java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 22:55:24,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 22:55:24,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 22:55:24,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 22:55:24,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 22:55:24,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 22:55:24,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 22:55:24,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 22:55:24,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 22:55:24,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 22:55:24,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 22:55:24,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 22:55:24,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 22:55:24,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 22:55:24,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 22:55:24,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 22:55:24,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 22:55:24,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 22:55:24,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 22:55:24,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 22:55:24,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 22:55:24,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 22:55:24,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 22:55:24,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 22:55:24,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 22:55:24,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 22:55:24,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 22:55:24,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 22:55:24,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 22:55:24,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 22:55:24,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 22:55:24,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 22:55:24,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 22:55:24,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 22:55:24,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 22:55:24,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 22:55:24,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 22:55:24,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 22:55:24,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 22:55:24,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 22:55:24,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 22:55:24,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 22:55:24,326 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 22:55:24,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 22:55:24,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 22:55:24,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 22:55:24,328 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 22:55:24,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 22:55:24,329 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 22:55:24,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 22:55:24,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 22:55:24,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 22:55:24,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 22:55:24,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 22:55:24,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 22:55:24,331 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 22:55:24,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 22:55:24,332 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 22:55:24,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 22:55:24,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 22:55:24,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 22:55:24,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 22:55:24,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 22:55:24,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 22:55:24,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 22:55:24,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 22:55:24,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 22:55:24,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 22:55:24,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 22:55:24,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 22:55:24,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 22:55:24,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 22:55:24,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 22:55:24,624 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 22:55:24,625 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 22:55:24,625 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 22:55:24,626 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-10-13 22:55:24,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5f328a5d/2bcf3205603a408b80f20adb5a9111e4/FLAGfbd7c399c [2019-10-13 22:55:25,352 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 22:55:25,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-10-13 22:55:25,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5f328a5d/2bcf3205603a408b80f20adb5a9111e4/FLAGfbd7c399c [2019-10-13 22:55:25,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5f328a5d/2bcf3205603a408b80f20adb5a9111e4 [2019-10-13 22:55:25,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 22:55:25,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 22:55:25,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 22:55:25,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 22:55:25,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 22:55:25,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:55:25" (1/1) ... [2019-10-13 22:55:25,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd35dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:25, skipping insertion in model container [2019-10-13 22:55:25,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:55:25" (1/1) ... [2019-10-13 22:55:25,480 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 22:55:25,569 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 22:55:26,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:55:26,747 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 22:55:26,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:55:27,061 INFO L192 MainTranslator]: Completed translation [2019-10-13 22:55:27,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:27 WrapperNode [2019-10-13 22:55:27,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 22:55:27,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 22:55:27,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 22:55:27,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 22:55:27,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:27" (1/1) ... [2019-10-13 22:55:27,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:27" (1/1) ... [2019-10-13 22:55:27,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:27" (1/1) ... [2019-10-13 22:55:27,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:27" (1/1) ... [2019-10-13 22:55:27,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:27" (1/1) ... [2019-10-13 22:55:27,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:27" (1/1) ... [2019-10-13 22:55:27,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:27" (1/1) ... [2019-10-13 22:55:27,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 22:55:27,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 22:55:27,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 22:55:27,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 22:55:27,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 22:55:27,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 22:55:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 22:55:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-13 22:55:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-13 22:55:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-13 22:55:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-13 22:55:27,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-13 22:55:27,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-13 22:55:27,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-13 22:55:27,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-13 22:55:27,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2019-10-13 22:55:27,453 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2019-10-13 22:55:27,453 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2019-10-13 22:55:27,453 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2019-10-13 22:55:27,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kzalloc_1 [2019-10-13 22:55:27,454 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2019-10-13 22:55:27,454 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2019-10-13 22:55:27,454 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2019-10-13 22:55:27,454 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_in [2019-10-13 22:55:27,454 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_out [2019-10-13 22:55:27,456 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register [2019-10-13 22:55:27,456 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2019-10-13 22:55:27,456 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2019-10-13 22:55:27,456 INFO L138 BoogieDeclarations]: Found implementation of procedure qcprobe [2019-10-13 22:55:27,456 INFO L138 BoogieDeclarations]: Found implementation of procedure qc_release [2019-10-13 22:55:27,456 INFO L138 BoogieDeclarations]: Found implementation of procedure qcinit [2019-10-13 22:55:27,457 INFO L138 BoogieDeclarations]: Found implementation of procedure qcexit [2019-10-13 22:55:27,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_usb_serial_driver_1 [2019-10-13 22:55:27,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_2 [2019-10-13 22:55:27,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 22:55:27,457 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2019-10-13 22:55:27,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_register_driver_2 [2019-10-13 22:55:27,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_3 [2019-10-13 22:55:27,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_4 [2019-10-13 22:55:27,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_5 [2019-10-13 22:55:27,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_6 [2019-10-13 22:55:27,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_7 [2019-10-13 22:55:27,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_8 [2019-10-13 22:55:27,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_9 [2019-10-13 22:55:27,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_10 [2019-10-13 22:55:27,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_deregister_11 [2019-10-13 22:55:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-13 22:55:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc [2019-10-13 22:55:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2019-10-13 22:55:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-13 22:55:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2019-10-13 22:55:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2019-10-13 22:55:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-13 22:55:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_reset_resume_2 [2019-10-13 22:55:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-13 22:55:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2019-10-13 22:55:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_enable_autosuspend [2019-10-13 22:55:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2019-10-13 22:55:27,463 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2019-10-13 22:55:27,463 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2019-10-13 22:55:27,463 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2019-10-13 22:55:27,463 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_register [2019-10-13 22:55:27,463 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2019-10-13 22:55:27,463 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2019-10-13 22:55:27,464 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2019-10-13 22:55:27,464 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2019-10-13 22:55:27,464 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2019-10-13 22:55:27,464 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2019-10-13 22:55:27,464 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2019-10-13 22:55:27,465 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_release [2019-10-13 22:55:27,465 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2019-10-13 22:55:27,465 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_startup [2019-10-13 22:55:27,465 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2019-10-13 22:55:27,465 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2019-10-13 22:55:27,466 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2019-10-13 22:55:27,466 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-13 22:55:27,466 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-13 22:55:27,466 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-13 22:55:27,467 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-13 22:55:27,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 22:55:27,467 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-13 22:55:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 22:55:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 22:55:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-13 22:55:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 22:55:27,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-13 22:55:27,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-13 22:55:27,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 22:55:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-13 22:55:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 22:55:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-13 22:55:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-13 22:55:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-13 22:55:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-13 22:55:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-13 22:55:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-13 22:55:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-13 22:55:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-13 22:55:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-13 22:55:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2019-10-13 22:55:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc [2019-10-13 22:55:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2019-10-13 22:55:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2019-10-13 22:55:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2019-10-13 22:55:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-13 22:55:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_4 [2019-10-13 22:55:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_7 [2019-10-13 22:55:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_9 [2019-10-13 22:55:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_10 [2019-10-13 22:55:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2019-10-13 22:55:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2019-10-13 22:55:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kzalloc_1 [2019-10-13 22:55:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2019-10-13 22:55:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_usb_serial_driver_1 [2019-10-13 22:55:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_2 [2019-10-13 22:55:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2019-10-13 22:55:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2019-10-13 22:55:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 22:55:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2019-10-13 22:55:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2019-10-13 22:55:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_in [2019-10-13 22:55:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_out [2019-10-13 22:55:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure usb_enable_autosuspend [2019-10-13 22:55:27,476 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2019-10-13 22:55:27,476 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_register_driver_2 [2019-10-13 22:55:27,476 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register [2019-10-13 22:55:27,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 22:55:27,476 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2019-10-13 22:55:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_deregister_11 [2019-10-13 22:55:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2019-10-13 22:55:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_3 [2019-10-13 22:55:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_5 [2019-10-13 22:55:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_6 [2019-10-13 22:55:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_8 [2019-10-13 22:55:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2019-10-13 22:55:27,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 22:55:27,479 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2019-10-13 22:55:27,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 22:55:27,480 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_register [2019-10-13 22:55:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2019-10-13 22:55:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2019-10-13 22:55:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2019-10-13 22:55:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2019-10-13 22:55:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2019-10-13 22:55:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2019-10-13 22:55:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2019-10-13 22:55:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_startup [2019-10-13 22:55:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2019-10-13 22:55:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_release [2019-10-13 22:55:27,491 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2019-10-13 22:55:27,492 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2019-10-13 22:55:27,492 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2019-10-13 22:55:27,492 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2019-10-13 22:55:27,492 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2019-10-13 22:55:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure qcprobe [2019-10-13 22:55:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 22:55:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure qc_release [2019-10-13 22:55:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure qcinit [2019-10-13 22:55:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure qcexit [2019-10-13 22:55:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_reset_resume_2 [2019-10-13 22:55:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-13 22:55:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-13 22:55:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 22:55:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-13 22:55:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-13 22:55:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 22:55:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 22:55:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 22:55:27,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 22:55:27,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 22:55:27,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 22:55:28,545 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-13 22:55:30,447 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 22:55:30,448 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 22:55:30,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:55:30 BoogieIcfgContainer [2019-10-13 22:55:30,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 22:55:30,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 22:55:30,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 22:55:30,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 22:55:30,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:55:25" (1/3) ... [2019-10-13 22:55:30,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fef58ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:55:30, skipping insertion in model container [2019-10-13 22:55:30,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:27" (2/3) ... [2019-10-13 22:55:30,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fef58ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:55:30, skipping insertion in model container [2019-10-13 22:55:30,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:55:30" (3/3) ... [2019-10-13 22:55:30,459 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-10-13 22:55:30,468 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 22:55:30,482 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 22:55:30,493 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 22:55:30,537 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 22:55:30,537 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 22:55:30,538 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 22:55:30,538 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 22:55:30,538 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 22:55:30,538 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 22:55:30,539 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 22:55:30,539 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 22:55:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states. [2019-10-13 22:55:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-13 22:55:30,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:55:30,580 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 22:55:30,582 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:55:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:55:30,588 INFO L82 PathProgramCache]: Analyzing trace with hash 394282032, now seen corresponding path program 1 times [2019-10-13 22:55:30,597 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:55:30,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868316924] [2019-10-13 22:55:30,598 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:30,598 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:30,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:55:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:55:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 22:55:31,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868316924] [2019-10-13 22:55:31,273 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:55:31,274 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:55:31,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437213444] [2019-10-13 22:55:31,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:55:31,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:55:31,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:55:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:55:31,298 INFO L87 Difference]: Start difference. First operand 448 states. Second operand 3 states. [2019-10-13 22:55:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:55:31,644 INFO L93 Difference]: Finished difference Result 1214 states and 1590 transitions. [2019-10-13 22:55:31,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:55:31,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2019-10-13 22:55:31,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:55:31,690 INFO L225 Difference]: With dead ends: 1214 [2019-10-13 22:55:31,692 INFO L226 Difference]: Without dead ends: 778 [2019-10-13 22:55:31,705 INFO L600 BasicCegarLoop]: 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 [2019-10-13 22:55:31,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2019-10-13 22:55:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2019-10-13 22:55:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2019-10-13 22:55:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1012 transitions. [2019-10-13 22:55:31,904 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1012 transitions. Word has length 83 [2019-10-13 22:55:31,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:55:31,905 INFO L462 AbstractCegarLoop]: Abstraction has 778 states and 1012 transitions. [2019-10-13 22:55:31,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:55:31,905 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1012 transitions. [2019-10-13 22:55:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-13 22:55:31,924 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:55:31,925 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 22:55:31,925 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:55:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:55:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash 226321823, now seen corresponding path program 1 times [2019-10-13 22:55:31,926 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:55:31,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016960733] [2019-10-13 22:55:31,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:31,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:31,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:55:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:55:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 22:55:32,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016960733] [2019-10-13 22:55:32,236 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:55:32,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:55:32,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328284087] [2019-10-13 22:55:32,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:55:32,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:55:32,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:55:32,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:55:32,239 INFO L87 Difference]: Start difference. First operand 778 states and 1012 transitions. Second operand 3 states. [2019-10-13 22:55:32,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:55:32,339 INFO L93 Difference]: Finished difference Result 1501 states and 1981 transitions. [2019-10-13 22:55:32,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:55:32,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2019-10-13 22:55:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:55:32,354 INFO L225 Difference]: With dead ends: 1501 [2019-10-13 22:55:32,355 INFO L226 Difference]: Without dead ends: 1482 [2019-10-13 22:55:32,357 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:55:32,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2019-10-13 22:55:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1440. [2019-10-13 22:55:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2019-10-13 22:55:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1895 transitions. [2019-10-13 22:55:32,459 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1895 transitions. Word has length 81 [2019-10-13 22:55:32,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:55:32,464 INFO L462 AbstractCegarLoop]: Abstraction has 1440 states and 1895 transitions. [2019-10-13 22:55:32,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:55:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1895 transitions. [2019-10-13 22:55:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 22:55:32,481 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:55:32,481 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:55:32,481 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:55:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:55:32,482 INFO L82 PathProgramCache]: Analyzing trace with hash -521682506, now seen corresponding path program 1 times [2019-10-13 22:55:32,483 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:55:32,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926443225] [2019-10-13 22:55:32,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:32,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:32,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:55:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:55:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 22:55:32,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926443225] [2019-10-13 22:55:32,842 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:55:32,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:55:32,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498078819] [2019-10-13 22:55:32,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:55:32,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:55:32,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:55:32,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:55:32,845 INFO L87 Difference]: Start difference. First operand 1440 states and 1895 transitions. Second operand 3 states. [2019-10-13 22:55:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:55:33,142 INFO L93 Difference]: Finished difference Result 3160 states and 4150 transitions. [2019-10-13 22:55:33,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:55:33,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-10-13 22:55:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:55:33,153 INFO L225 Difference]: With dead ends: 3160 [2019-10-13 22:55:33,154 INFO L226 Difference]: Without dead ends: 1747 [2019-10-13 22:55:33,159 INFO L600 BasicCegarLoop]: 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 [2019-10-13 22:55:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2019-10-13 22:55:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1728. [2019-10-13 22:55:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1728 states. [2019-10-13 22:55:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2266 transitions. [2019-10-13 22:55:33,244 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2266 transitions. Word has length 118 [2019-10-13 22:55:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:55:33,245 INFO L462 AbstractCegarLoop]: Abstraction has 1728 states and 2266 transitions. [2019-10-13 22:55:33,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:55:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2266 transitions. [2019-10-13 22:55:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 22:55:33,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:55:33,251 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:55:33,251 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:55:33,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:55:33,252 INFO L82 PathProgramCache]: Analyzing trace with hash -881599301, now seen corresponding path program 1 times [2019-10-13 22:55:33,252 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:55:33,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382457129] [2019-10-13 22:55:33,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:33,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:33,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:55:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:55:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-10-13 22:55:33,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382457129] [2019-10-13 22:55:33,616 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:55:33,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 22:55:33,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265490774] [2019-10-13 22:55:33,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 22:55:33,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:55:33,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 22:55:33,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:55:33,618 INFO L87 Difference]: Start difference. First operand 1728 states and 2266 transitions. Second operand 5 states. [2019-10-13 22:55:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:55:33,848 INFO L93 Difference]: Finished difference Result 3662 states and 4760 transitions. [2019-10-13 22:55:33,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 22:55:33,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2019-10-13 22:55:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:55:33,860 INFO L225 Difference]: With dead ends: 3662 [2019-10-13 22:55:33,860 INFO L226 Difference]: Without dead ends: 1953 [2019-10-13 22:55:33,866 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 22:55:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2019-10-13 22:55:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1734. [2019-10-13 22:55:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1734 states. [2019-10-13 22:55:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2270 transitions. [2019-10-13 22:55:33,950 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2270 transitions. Word has length 166 [2019-10-13 22:55:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:55:33,951 INFO L462 AbstractCegarLoop]: Abstraction has 1734 states and 2270 transitions. [2019-10-13 22:55:33,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 22:55:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2270 transitions. [2019-10-13 22:55:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 22:55:33,956 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:55:33,957 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:55:33,957 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:55:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:55:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash 515293493, now seen corresponding path program 1 times [2019-10-13 22:55:33,957 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:55:33,958 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747683716] [2019-10-13 22:55:33,958 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:33,958 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:33,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:55:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:55:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-13 22:55:34,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747683716] [2019-10-13 22:55:34,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176573062] [2019-10-13 22:55:34,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:55:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:55:35,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 3732 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-13 22:55:35,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:55:35,615 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2019-10-13 22:55:35,616 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 22:55:35,650 INFO L567 ElimStorePlain]: treesize reduction 4, result has 85.2 percent of original size [2019-10-13 22:55:35,650 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-10-13 22:55:35,650 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:23 [2019-10-13 22:55:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-13 22:55:36,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:55:36,446 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-13 22:55:37,711 WARN L191 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 204 DAG size of output: 86 [2019-10-13 22:55:37,937 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-13 22:55:38,166 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-13 22:55:38,378 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-10-13 22:55:38,626 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-13 22:55:38,842 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-13 22:55:39,110 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-10-13 22:55:39,355 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-13 22:55:39,578 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-13 22:55:39,822 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-13 22:55:40,076 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-10-13 22:55:40,324 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-13 22:55:40,548 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-13 22:55:40,772 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-13 22:55:40,996 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2019-10-13 22:55:41,286 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-13 22:55:42,439 WARN L191 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 204 DAG size of output: 85 [2019-10-13 22:55:42,653 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-13 22:55:42,882 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-13 22:55:43,108 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-10-13 22:55:43,317 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-13 22:55:43,516 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-13 22:55:43,767 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-10-13 22:55:43,996 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-13 22:55:44,215 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-13 22:55:44,429 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-13 22:55:44,669 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2019-10-13 22:55:44,898 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-13 22:55:45,111 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-13 22:55:45,329 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-13 22:55:45,542 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2019-10-13 22:55:45,858 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-13 22:55:46,994 WARN L191 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 204 DAG size of output: 85 [2019-10-13 22:55:47,180 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-13 22:55:47,396 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-13 22:55:47,587 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-10-13 22:55:47,785 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-13 22:55:47,978 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-13 22:55:48,202 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-10-13 22:55:48,392 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-13 22:55:48,617 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-13 22:55:48,820 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-13 22:55:49,038 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2019-10-13 22:55:49,232 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-13 22:55:49,466 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-13 22:55:49,671 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-13 22:55:49,803 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-13 22:55:50,902 WARN L191 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 204 DAG size of output: 84 [2019-10-13 22:55:51,097 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-13 22:55:51,304 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-13 22:55:51,490 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-13 22:55:51,686 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-13 22:55:51,887 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-13 22:55:52,120 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-10-13 22:55:52,359 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-13 22:55:52,554 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-13 22:55:52,760 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-13 22:55:52,887 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-13 22:55:53,860 WARN L191 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 80 [2019-10-13 22:55:54,001 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-13 22:55:54,177 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-13 22:55:54,319 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2019-10-13 22:55:54,461 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-13 22:55:54,612 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-13 22:55:54,739 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-13 22:55:55,831 WARN L191 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 204 DAG size of output: 84 [2019-10-13 22:55:56,008 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-13 22:55:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-13 22:55:56,259 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 22:55:56,259 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [15, 6] imperfect sequences [6] total 23 [2019-10-13 22:55:56,259 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985498653] [2019-10-13 22:55:56,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 22:55:56,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:55:56,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 22:55:56,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2019-10-13 22:55:56,263 INFO L87 Difference]: Start difference. First operand 1734 states and 2270 transitions. Second operand 19 states. [2019-10-13 22:55:58,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:55:58,275 INFO L93 Difference]: Finished difference Result 2734 states and 3605 transitions. [2019-10-13 22:55:58,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 22:55:58,279 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 191 [2019-10-13 22:55:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:55:58,295 INFO L225 Difference]: With dead ends: 2734 [2019-10-13 22:55:58,295 INFO L226 Difference]: Without dead ends: 1836 [2019-10-13 22:55:58,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 363 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2019-10-13 22:55:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2019-10-13 22:55:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1746. [2019-10-13 22:55:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1746 states. [2019-10-13 22:55:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2282 transitions. [2019-10-13 22:55:58,402 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2282 transitions. Word has length 191 [2019-10-13 22:55:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:55:58,403 INFO L462 AbstractCegarLoop]: Abstraction has 1746 states and 2282 transitions. [2019-10-13 22:55:58,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 22:55:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2282 transitions. [2019-10-13 22:55:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 22:55:58,408 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:55:58,408 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:55:58,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:55:58,627 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:55:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:55:58,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1559019880, now seen corresponding path program 1 times [2019-10-13 22:55:58,628 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:55:58,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077536586] [2019-10-13 22:55:58,629 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:58,629 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:58,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:55:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:55:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-13 22:55:59,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077536586] [2019-10-13 22:55:59,061 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:55:59,061 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:55:59,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797210] [2019-10-13 22:55:59,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:55:59,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:55:59,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:55:59,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:55:59,070 INFO L87 Difference]: Start difference. First operand 1746 states and 2282 transitions. Second operand 3 states. [2019-10-13 22:55:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:55:59,422 INFO L93 Difference]: Finished difference Result 3964 states and 5261 transitions. [2019-10-13 22:55:59,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:55:59,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2019-10-13 22:55:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:55:59,435 INFO L225 Difference]: With dead ends: 3964 [2019-10-13 22:55:59,435 INFO L226 Difference]: Without dead ends: 2251 [2019-10-13 22:55:59,441 INFO L600 BasicCegarLoop]: 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 [2019-10-13 22:55:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2019-10-13 22:55:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2206. [2019-10-13 22:55:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2206 states. [2019-10-13 22:55:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 2851 transitions. [2019-10-13 22:55:59,532 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 2851 transitions. Word has length 191 [2019-10-13 22:55:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:55:59,534 INFO L462 AbstractCegarLoop]: Abstraction has 2206 states and 2851 transitions. [2019-10-13 22:55:59,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:55:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 2851 transitions. [2019-10-13 22:55:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-13 22:55:59,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:55:59,540 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:55:59,541 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:55:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:55:59,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1905539141, now seen corresponding path program 1 times [2019-10-13 22:55:59,541 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:55:59,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536375210] [2019-10-13 22:55:59,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:59,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:55:59,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:55:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:56:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-13 22:56:00,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536375210] [2019-10-13 22:56:00,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959537071] [2019-10-13 22:56:00,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:56:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:56:02,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 3810 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 22:56:02,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:56:02,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:56:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 22:56:02,193 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:56:02,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:56:02,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:56:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-13 22:56:02,656 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 22:56:02,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2019-10-13 22:56:02,656 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824538821] [2019-10-13 22:56:02,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 22:56:02,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:56:02,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 22:56:02,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-13 22:56:02,658 INFO L87 Difference]: Start difference. First operand 2206 states and 2851 transitions. Second operand 6 states.