/usr/bin/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-fb55353 [2019-11-07 03:53:56,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:53:56,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:53:56,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:53:56,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:53:56,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:53:56,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:53:56,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:53:56,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:53:56,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:53:56,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:53:56,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:53:56,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:53:56,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:53:56,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:53:56,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:53:56,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:53:56,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:53:56,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:53:56,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:53:56,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:53:56,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:53:56,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:53:56,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:53:56,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 03:53:56,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 03:53:56,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 03:53:56,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 03:53:56,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 03:53:56,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 03:53:56,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 03:53:56,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 03:53:56,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 03:53:56,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 03:53:56,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 03:53:56,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 03:53:56,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 03:53:56,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 03:53:56,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:53:56,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:53:56,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:53:56,422 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 [2019-11-07 03:53:56,456 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:53:56,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:53:56,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:53:56,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:53:56,461 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:53:56,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:53:56,461 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:53:56,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:53:56,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:53:56,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:53:56,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:53:56,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:53:56,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:53:56,462 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:53:56,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:53:56,464 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:53:56,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:53:56,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:53:56,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:53:56,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:53:56,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:53:56,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:53:56,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:53:56,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:53:56,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:53:56,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:53:56,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:53:56,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:53:56,466 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 [2019-11-07 03:53:56,773 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:53:56,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:53:56,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:53:56,811 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:53:56,812 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:53:56,813 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-11-07 03:53:56,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2afc53bb8/fcbbd79c715b4da99e670c06a619637a/FLAGb148b5538 [2019-11-07 03:53:57,580 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:53:57,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-11-07 03:53:57,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2afc53bb8/fcbbd79c715b4da99e670c06a619637a/FLAGb148b5538 [2019-11-07 03:53:57,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2afc53bb8/fcbbd79c715b4da99e670c06a619637a [2019-11-07 03:53:57,750 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:53:57,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:53:57,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:53:57,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:53:57,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:53:57,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:53:57" (1/1) ... [2019-11-07 03:53:57,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cef4058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:57, skipping insertion in model container [2019-11-07 03:53:57,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:53:57" (1/1) ... [2019-11-07 03:53:57,769 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:53:57,877 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:53:58,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:53:59,092 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:53:59,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:53:59,430 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:53:59,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:59 WrapperNode [2019-11-07 03:53:59,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:53:59,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:53:59,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:53:59,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:53:59,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:59" (1/1) ... [2019-11-07 03:53:59,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:59" (1/1) ... [2019-11-07 03:53:59,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:59" (1/1) ... [2019-11-07 03:53:59,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:59" (1/1) ... [2019-11-07 03:53:59,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:59" (1/1) ... [2019-11-07 03:53:59,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:59" (1/1) ... [2019-11-07 03:53:59,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:59" (1/1) ... [2019-11-07 03:53:59,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:53:59,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:53:59,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:53:59,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:53:59,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:59" (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 [2019-11-07 03:53:59,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:53:59,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:53:59,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-11-07 03:53:59,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-11-07 03:53:59,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-11-07 03:53:59,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-11-07 03:53:59,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-11-07 03:53:59,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-11-07 03:53:59,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-11-07 03:53:59,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-11-07 03:53:59,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2019-11-07 03:53:59,808 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2019-11-07 03:53:59,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2019-11-07 03:53:59,808 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2019-11-07 03:53:59,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kzalloc_1 [2019-11-07 03:53:59,809 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2019-11-07 03:53:59,809 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2019-11-07 03:53:59,809 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2019-11-07 03:53:59,809 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_in [2019-11-07 03:53:59,811 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_out [2019-11-07 03:53:59,811 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register [2019-11-07 03:53:59,812 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2019-11-07 03:53:59,812 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2019-11-07 03:53:59,812 INFO L138 BoogieDeclarations]: Found implementation of procedure qcprobe [2019-11-07 03:53:59,812 INFO L138 BoogieDeclarations]: Found implementation of procedure qc_release [2019-11-07 03:53:59,813 INFO L138 BoogieDeclarations]: Found implementation of procedure qcinit [2019-11-07 03:53:59,813 INFO L138 BoogieDeclarations]: Found implementation of procedure qcexit [2019-11-07 03:53:59,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_usb_serial_driver_1 [2019-11-07 03:53:59,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_2 [2019-11-07 03:53:59,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:53:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2019-11-07 03:53:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_register_driver_2 [2019-11-07 03:53:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_3 [2019-11-07 03:53:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_4 [2019-11-07 03:53:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_5 [2019-11-07 03:53:59,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_6 [2019-11-07 03:53:59,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_7 [2019-11-07 03:53:59,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_8 [2019-11-07 03:53:59,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_9 [2019-11-07 03:53:59,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_10 [2019-11-07 03:53:59,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_deregister_11 [2019-11-07 03:53:59,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-11-07 03:53:59,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc [2019-11-07 03:53:59,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2019-11-07 03:53:59,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-11-07 03:53:59,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2019-11-07 03:53:59,899 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2019-11-07 03:53:59,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-11-07 03:53:59,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_reset_resume_2 [2019-11-07 03:53:59,900 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-11-07 03:53:59,900 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2019-11-07 03:53:59,900 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_enable_autosuspend [2019-11-07 03:53:59,900 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2019-11-07 03:53:59,901 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2019-11-07 03:53:59,901 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2019-11-07 03:53:59,901 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2019-11-07 03:53:59,901 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_register [2019-11-07 03:53:59,902 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2019-11-07 03:53:59,902 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2019-11-07 03:53:59,903 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2019-11-07 03:53:59,904 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2019-11-07 03:53:59,904 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2019-11-07 03:53:59,904 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2019-11-07 03:53:59,904 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2019-11-07 03:53:59,904 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_release [2019-11-07 03:53:59,905 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2019-11-07 03:53:59,905 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_startup [2019-11-07 03:53:59,905 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2019-11-07 03:53:59,905 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2019-11-07 03:53:59,905 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2019-11-07 03:53:59,906 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-11-07 03:53:59,907 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-11-07 03:53:59,907 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-11-07 03:53:59,909 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-11-07 03:53:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:53:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-11-07 03:53:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 03:53:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 03:53:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-11-07 03:53:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 03:53:59,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-11-07 03:53:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-11-07 03:53:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 03:53:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-11-07 03:53:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 03:53:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-11-07 03:53:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-11-07 03:53:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-11-07 03:53:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-11-07 03:53:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-11-07 03:53:59,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-11-07 03:53:59,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-11-07 03:53:59,919 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-11-07 03:53:59,919 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-11-07 03:53:59,919 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2019-11-07 03:53:59,919 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc [2019-11-07 03:53:59,920 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2019-11-07 03:53:59,920 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2019-11-07 03:53:59,920 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2019-11-07 03:53:59,920 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-11-07 03:53:59,920 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_4 [2019-11-07 03:53:59,921 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_7 [2019-11-07 03:53:59,921 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_9 [2019-11-07 03:53:59,921 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_10 [2019-11-07 03:53:59,921 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2019-11-07 03:53:59,922 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2019-11-07 03:53:59,922 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kzalloc_1 [2019-11-07 03:53:59,922 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2019-11-07 03:53:59,922 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_usb_serial_driver_1 [2019-11-07 03:53:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_2 [2019-11-07 03:53:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2019-11-07 03:53:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2019-11-07 03:53:59,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:53:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2019-11-07 03:53:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2019-11-07 03:53:59,925 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_in [2019-11-07 03:53:59,926 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_out [2019-11-07 03:53:59,926 INFO L130 BoogieDeclarations]: Found specification of procedure usb_enable_autosuspend [2019-11-07 03:53:59,926 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2019-11-07 03:53:59,926 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_register_driver_2 [2019-11-07 03:53:59,928 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register [2019-11-07 03:53:59,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 03:53:59,929 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2019-11-07 03:53:59,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_deregister_11 [2019-11-07 03:53:59,932 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2019-11-07 03:53:59,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_3 [2019-11-07 03:53:59,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_5 [2019-11-07 03:53:59,933 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_6 [2019-11-07 03:53:59,933 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_8 [2019-11-07 03:53:59,933 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2019-11-07 03:53:59,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 03:53:59,935 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2019-11-07 03:53:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 03:53:59,937 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_register [2019-11-07 03:53:59,941 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2019-11-07 03:53:59,942 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2019-11-07 03:53:59,942 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2019-11-07 03:53:59,942 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2019-11-07 03:53:59,943 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2019-11-07 03:53:59,943 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2019-11-07 03:53:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2019-11-07 03:53:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_startup [2019-11-07 03:53:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2019-11-07 03:53:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_release [2019-11-07 03:53:59,951 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2019-11-07 03:53:59,951 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2019-11-07 03:53:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2019-11-07 03:53:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2019-11-07 03:53:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2019-11-07 03:53:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure qcprobe [2019-11-07 03:53:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:53:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure qc_release [2019-11-07 03:53:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure qcinit [2019-11-07 03:53:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure qcexit [2019-11-07 03:53:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_reset_resume_2 [2019-11-07 03:53:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-11-07 03:53:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-11-07 03:53:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:53:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-11-07 03:53:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-11-07 03:53:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 03:53:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:53:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 03:53:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-07 03:53:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:53:59,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:54:01,247 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-11-07 03:54:03,171 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:54:03,172 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-07 03:54:03,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:54:03 BoogieIcfgContainer [2019-11-07 03:54:03,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:54:03,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:54:03,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:54:03,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:54:03,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:53:57" (1/3) ... [2019-11-07 03:54:03,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bb79ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:54:03, skipping insertion in model container [2019-11-07 03:54:03,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:53:59" (2/3) ... [2019-11-07 03:54:03,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bb79ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:54:03, skipping insertion in model container [2019-11-07 03:54:03,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:54:03" (3/3) ... [2019-11-07 03:54:03,183 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 [2019-11-07 03:54:03,193 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:54:03,206 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:54:03,218 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:54:03,263 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:54:03,263 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:54:03,263 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:54:03,263 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:54:03,264 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:54:03,264 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:54:03,264 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:54:03,264 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:54:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states. [2019-11-07 03:54:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-07 03:54:03,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:03,333 INFO L410 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] [2019-11-07 03:54:03,335 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash 394282032, now seen corresponding path program 1 times [2019-11-07 03:54:03,352 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:03,352 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632684017] [2019-11-07 03:54:03,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-07 03:54:04,187 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632684017] [2019-11-07 03:54:04,188 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:04,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:54:04,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265201945] [2019-11-07 03:54:04,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:54:04,198 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:54:04,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:54:04,215 INFO L87 Difference]: Start difference. First operand 448 states. Second operand 3 states. [2019-11-07 03:54:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:04,582 INFO L93 Difference]: Finished difference Result 1214 states and 1590 transitions. [2019-11-07 03:54:04,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:54:04,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2019-11-07 03:54:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:04,609 INFO L225 Difference]: With dead ends: 1214 [2019-11-07 03:54:04,610 INFO L226 Difference]: Without dead ends: 778 [2019-11-07 03:54:04,617 INFO L630 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 [2019-11-07 03:54:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2019-11-07 03:54:04,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2019-11-07 03:54:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2019-11-07 03:54:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1012 transitions. [2019-11-07 03:54:04,743 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1012 transitions. Word has length 83 [2019-11-07 03:54:04,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:04,744 INFO L462 AbstractCegarLoop]: Abstraction has 778 states and 1012 transitions. [2019-11-07 03:54:04,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:54:04,744 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1012 transitions. [2019-11-07 03:54:04,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-07 03:54:04,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:04,749 INFO L410 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] [2019-11-07 03:54:04,750 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:04,750 INFO L82 PathProgramCache]: Analyzing trace with hash 226321823, now seen corresponding path program 1 times [2019-11-07 03:54:04,750 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:04,750 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936702435] [2019-11-07 03:54:04,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-07 03:54:05,024 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936702435] [2019-11-07 03:54:05,024 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:05,024 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:54:05,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023844705] [2019-11-07 03:54:05,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:54:05,026 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:05,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:54:05,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:54:05,027 INFO L87 Difference]: Start difference. First operand 778 states and 1012 transitions. Second operand 3 states. [2019-11-07 03:54:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:05,105 INFO L93 Difference]: Finished difference Result 1501 states and 1981 transitions. [2019-11-07 03:54:05,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:54:05,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2019-11-07 03:54:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:05,123 INFO L225 Difference]: With dead ends: 1501 [2019-11-07 03:54:05,123 INFO L226 Difference]: Without dead ends: 1482 [2019-11-07 03:54:05,125 INFO L630 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 [2019-11-07 03:54:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2019-11-07 03:54:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1440. [2019-11-07 03:54:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2019-11-07 03:54:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1895 transitions. [2019-11-07 03:54:05,257 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1895 transitions. Word has length 81 [2019-11-07 03:54:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:05,261 INFO L462 AbstractCegarLoop]: Abstraction has 1440 states and 1895 transitions. [2019-11-07 03:54:05,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:54:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1895 transitions. [2019-11-07 03:54:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-07 03:54:05,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:05,273 INFO L410 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] [2019-11-07 03:54:05,274 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:05,274 INFO L82 PathProgramCache]: Analyzing trace with hash -521682506, now seen corresponding path program 1 times [2019-11-07 03:54:05,275 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:05,275 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806861435] [2019-11-07 03:54:05,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-07 03:54:05,609 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806861435] [2019-11-07 03:54:05,610 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:05,610 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:54:05,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255659196] [2019-11-07 03:54:05,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:54:05,611 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:05,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:54:05,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:54:05,612 INFO L87 Difference]: Start difference. First operand 1440 states and 1895 transitions. Second operand 3 states. [2019-11-07 03:54:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:05,979 INFO L93 Difference]: Finished difference Result 3160 states and 4150 transitions. [2019-11-07 03:54:05,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:54:05,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-11-07 03:54:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:05,993 INFO L225 Difference]: With dead ends: 3160 [2019-11-07 03:54:05,993 INFO L226 Difference]: Without dead ends: 1747 [2019-11-07 03:54:06,001 INFO L630 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 [2019-11-07 03:54:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2019-11-07 03:54:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1728. [2019-11-07 03:54:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1728 states. [2019-11-07 03:54:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2266 transitions. [2019-11-07 03:54:06,090 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2266 transitions. Word has length 118 [2019-11-07 03:54:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:06,091 INFO L462 AbstractCegarLoop]: Abstraction has 1728 states and 2266 transitions. [2019-11-07 03:54:06,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:54:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2266 transitions. [2019-11-07 03:54:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 03:54:06,099 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:06,100 INFO L410 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] [2019-11-07 03:54:06,100 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:06,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:06,101 INFO L82 PathProgramCache]: Analyzing trace with hash -881599301, now seen corresponding path program 1 times [2019-11-07 03:54:06,101 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:06,101 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678219455] [2019-11-07 03:54:06,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-07 03:54:06,437 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678219455] [2019-11-07 03:54:06,438 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:06,438 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 03:54:06,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639323385] [2019-11-07 03:54:06,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:54:06,439 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:54:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:54:06,440 INFO L87 Difference]: Start difference. First operand 1728 states and 2266 transitions. Second operand 5 states. [2019-11-07 03:54:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:06,767 INFO L93 Difference]: Finished difference Result 3662 states and 4760 transitions. [2019-11-07 03:54:06,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 03:54:06,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2019-11-07 03:54:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:06,786 INFO L225 Difference]: With dead ends: 3662 [2019-11-07 03:54:06,786 INFO L226 Difference]: Without dead ends: 1953 [2019-11-07 03:54:06,793 INFO L630 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 [2019-11-07 03:54:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2019-11-07 03:54:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1734. [2019-11-07 03:54:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1734 states. [2019-11-07 03:54:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2270 transitions. [2019-11-07 03:54:06,908 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2270 transitions. Word has length 166 [2019-11-07 03:54:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:06,909 INFO L462 AbstractCegarLoop]: Abstraction has 1734 states and 2270 transitions. [2019-11-07 03:54:06,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:54:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2270 transitions. [2019-11-07 03:54:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-07 03:54:06,915 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:06,916 INFO L410 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] [2019-11-07 03:54:06,916 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:06,916 INFO L82 PathProgramCache]: Analyzing trace with hash 515293493, now seen corresponding path program 1 times [2019-11-07 03:54:06,917 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:06,917 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211437983] [2019-11-07 03:54:06,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-07 03:54:07,593 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211437983] [2019-11-07 03:54:07,594 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700393445] [2019-11-07 03:54:07,594 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 [2019-11-07 03:54:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:08,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 3732 conjuncts, 59 conjunts are in the unsatisfiable core [2019-11-07 03:54:08,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:54:09,058 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 [2019-11-07 03:54:09,059 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 03:54:09,103 INFO L567 ElimStorePlain]: treesize reduction 4, result has 85.2 percent of original size [2019-11-07 03:54:09,104 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-11-07 03:54:09,104 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:23 [2019-11-07 03:54:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-11-07 03:54:09,780 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:54:09,965 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-11-07 03:54:11,567 WARN L191 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 204 DAG size of output: 86 [2019-11-07 03:54:11,853 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-07 03:54:12,229 WARN L191 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-07 03:54:12,468 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-11-07 03:54:12,741 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-07 03:54:13,014 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-07 03:54:13,322 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-11-07 03:54:13,560 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-07 03:54:13,834 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-07 03:54:14,101 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-07 03:54:14,416 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-11-07 03:54:14,702 WARN L191 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-07 03:54:15,033 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-07 03:54:15,287 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-07 03:54:15,551 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2019-11-07 03:54:15,871 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-11-07 03:54:17,355 WARN L191 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 204 DAG size of output: 85 [2019-11-07 03:54:17,604 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-07 03:54:17,915 WARN L191 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 03:54:18,140 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-11-07 03:54:18,368 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-07 03:54:18,624 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-07 03:54:18,901 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-11-07 03:54:19,154 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-07 03:54:19,424 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 03:54:19,739 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 03:54:20,010 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2019-11-07 03:54:20,253 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-07 03:54:20,506 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 03:54:20,762 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 03:54:21,033 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2019-11-07 03:54:21,359 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-11-07 03:54:22,782 WARN L191 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 204 DAG size of output: 85 [2019-11-07 03:54:23,010 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-07 03:54:23,254 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 03:54:23,467 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-11-07 03:54:23,706 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-07 03:54:23,930 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-07 03:54:24,167 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-11-07 03:54:24,394 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-07 03:54:24,636 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 03:54:24,883 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 03:54:25,152 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2019-11-07 03:54:25,458 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-11-07 03:54:25,701 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 03:54:25,934 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 03:54:26,076 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-11-07 03:54:27,419 WARN L191 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 204 DAG size of output: 84 [2019-11-07 03:54:27,647 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-11-07 03:54:27,943 WARN L191 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 03:54:28,172 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-07 03:54:28,406 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-11-07 03:54:28,642 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-11-07 03:54:28,906 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-11-07 03:54:29,130 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-11-07 03:54:29,352 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 03:54:29,598 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 03:54:29,755 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-11-07 03:54:31,102 WARN L191 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 204 DAG size of output: 80 [2019-11-07 03:54:31,270 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-07 03:54:31,453 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-11-07 03:54:31,619 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2019-11-07 03:54:31,794 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-07 03:54:31,957 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-07 03:54:32,115 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-11-07 03:54:33,490 WARN L191 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 204 DAG size of output: 84 [2019-11-07 03:54:33,686 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-11-07 03:54:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-11-07 03:54:34,029 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 03:54:34,029 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 6] imperfect sequences [6] total 23 [2019-11-07 03:54:34,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830628959] [2019-11-07 03:54:34,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-07 03:54:34,030 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:34,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-07 03:54:34,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2019-11-07 03:54:34,031 INFO L87 Difference]: Start difference. First operand 1734 states and 2270 transitions. Second operand 19 states. [2019-11-07 03:54:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:35,646 INFO L93 Difference]: Finished difference Result 2734 states and 3605 transitions. [2019-11-07 03:54:35,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 03:54:35,648 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 191 [2019-11-07 03:54:35,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:35,661 INFO L225 Difference]: With dead ends: 2734 [2019-11-07 03:54:35,662 INFO L226 Difference]: Without dead ends: 1836 [2019-11-07 03:54:35,666 INFO L630 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 [2019-11-07 03:54:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2019-11-07 03:54:35,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1746. [2019-11-07 03:54:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1746 states. [2019-11-07 03:54:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2282 transitions. [2019-11-07 03:54:35,769 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2282 transitions. Word has length 191 [2019-11-07 03:54:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:54:35,770 INFO L462 AbstractCegarLoop]: Abstraction has 1746 states and 2282 transitions. [2019-11-07 03:54:35,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-07 03:54:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2282 transitions. [2019-11-07 03:54:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-07 03:54:35,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:54:35,774 INFO L410 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] [2019-11-07 03:54:35,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:54:35,984 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:54:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:54:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1559019880, now seen corresponding path program 1 times [2019-11-07 03:54:35,985 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:54:35,985 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034960441] [2019-11-07 03:54:35,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:54:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:54:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-07 03:54:36,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034960441] [2019-11-07 03:54:36,293 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:54:36,293 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:54:36,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24339230] [2019-11-07 03:54:36,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:54:36,300 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:54:36,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:54:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:54:36,300 INFO L87 Difference]: Start difference. First operand 1746 states and 2282 transitions. Second operand 3 states. [2019-11-07 03:54:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:54:36,713 INFO L93 Difference]: Finished difference Result 3964 states and 5261 transitions. [2019-11-07 03:54:36,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:54:36,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2019-11-07 03:54:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:54:36,726 INFO L225 Difference]: With dead ends: 3964 [2019-11-07 03:54:36,726 INFO L226 Difference]: Without dead ends: 2251 [2019-11-07 03:54:36,731 INFO L630 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 [2019-11-07 03:54:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states.