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 0.1.24-36ac518-m [2019-10-07 13:09:35,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:09:35,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:09:35,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:09:35,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:09:35,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:09:35,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:09:35,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:09:35,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:09:35,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:09:35,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:09:35,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:09:35,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:09:35,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:09:35,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:09:35,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:09:35,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:09:35,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:09:35,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:09:35,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:09:35,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:09:35,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:09:35,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:09:35,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:09:35,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 13:09:35,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 13:09:35,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 13:09:35,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 13:09:35,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 13:09:35,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 13:09:35,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:09:35,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:09:35,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:09:35,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:09:35,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:09:35,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:09:35,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:09:35,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:09:35,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:09:35,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:09:35,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:09:35,320 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 [2019-10-07 13:09:35,339 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:09:35,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:09:35,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:09:35,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:09:35,341 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:09:35,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:09:35,341 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:09:35,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:09:35,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:09:35,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:09:35,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:09:35,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:09:35,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:09:35,343 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:09:35,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:09:35,346 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:09:35,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:09:35,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:09:35,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:09:35,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:09:35,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:09:35,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:09:35,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:09:35,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:09:35,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:09:35,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:09:35,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:09:35,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:09:35,349 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 [2019-10-07 13:09:35,635 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:09:35,654 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:09:35,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:09:35,660 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:09:35,660 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:09:35,661 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-10-07 13:09:35,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb52da8c5/81a4ca78139c45f9af29553e0788ff51/FLAG2f63d28ca [2019-10-07 13:09:36,465 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:09:36,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2019-10-07 13:09:36,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb52da8c5/81a4ca78139c45f9af29553e0788ff51/FLAG2f63d28ca [2019-10-07 13:09:36,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb52da8c5/81a4ca78139c45f9af29553e0788ff51 [2019-10-07 13:09:36,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:09:36,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:09:36,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:09:36,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:09:36,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:09:36,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:09:36" (1/1) ... [2019-10-07 13:09:36,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dbd79e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:36, skipping insertion in model container [2019-10-07 13:09:36,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:09:36" (1/1) ... [2019-10-07 13:09:36,608 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:09:36,709 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:09:37,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:09:37,919 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:09:38,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:09:38,285 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:09:38,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:38 WrapperNode [2019-10-07 13:09:38,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:09:38,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:09:38,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:09:38,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:09:38,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:38" (1/1) ... [2019-10-07 13:09:38,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:38" (1/1) ... [2019-10-07 13:09:38,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:38" (1/1) ... [2019-10-07 13:09:38,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:38" (1/1) ... [2019-10-07 13:09:38,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:38" (1/1) ... [2019-10-07 13:09:38,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:38" (1/1) ... [2019-10-07 13:09:38,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:38" (1/1) ... [2019-10-07 13:09:38,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:09:38,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:09:38,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:09:38,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:09:38,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:38" (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 [2019-10-07 13:09:38,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:09:38,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:09:38,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-07 13:09:38,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-07 13:09:38,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-07 13:09:38,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-07 13:09:38,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-07 13:09:38,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-07 13:09:38,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-07 13:09:38,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-07 13:09:38,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2019-10-07 13:09:38,588 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2019-10-07 13:09:38,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2019-10-07 13:09:38,588 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2019-10-07 13:09:38,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kzalloc_1 [2019-10-07 13:09:38,589 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2019-10-07 13:09:38,589 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2019-10-07 13:09:38,589 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2019-10-07 13:09:38,589 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_in [2019-10-07 13:09:38,590 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_out [2019-10-07 13:09:38,590 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register [2019-10-07 13:09:38,590 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2019-10-07 13:09:38,590 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2019-10-07 13:09:38,591 INFO L138 BoogieDeclarations]: Found implementation of procedure qcprobe [2019-10-07 13:09:38,591 INFO L138 BoogieDeclarations]: Found implementation of procedure qc_release [2019-10-07 13:09:38,591 INFO L138 BoogieDeclarations]: Found implementation of procedure qcinit [2019-10-07 13:09:38,591 INFO L138 BoogieDeclarations]: Found implementation of procedure qcexit [2019-10-07 13:09:38,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_usb_serial_driver_1 [2019-10-07 13:09:38,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_2 [2019-10-07 13:09:38,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:09:38,592 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2019-10-07 13:09:38,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_register_driver_2 [2019-10-07 13:09:38,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_3 [2019-10-07 13:09:38,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_4 [2019-10-07 13:09:38,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_5 [2019-10-07 13:09:38,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_6 [2019-10-07 13:09:38,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_7 [2019-10-07 13:09:38,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_interface_8 [2019-10-07 13:09:38,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_9 [2019-10-07 13:09:38,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_10 [2019-10-07 13:09:38,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_deregister_11 [2019-10-07 13:09:38,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-07 13:09:38,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc [2019-10-07 13:09:38,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2019-10-07 13:09:38,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-07 13:09:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2019-10-07 13:09:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2019-10-07 13:09:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-07 13:09:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_reset_resume_2 [2019-10-07 13:09:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-07 13:09:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2019-10-07 13:09:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_enable_autosuspend [2019-10-07 13:09:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2019-10-07 13:09:38,596 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2019-10-07 13:09:38,596 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2019-10-07 13:09:38,596 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2019-10-07 13:09:38,596 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_register [2019-10-07 13:09:38,596 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2019-10-07 13:09:38,596 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2019-10-07 13:09:38,596 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2019-10-07 13:09:38,597 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2019-10-07 13:09:38,597 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2019-10-07 13:09:38,597 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2019-10-07 13:09:38,597 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2019-10-07 13:09:38,597 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_release [2019-10-07 13:09:38,597 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2019-10-07 13:09:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_startup [2019-10-07 13:09:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2019-10-07 13:09:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2019-10-07 13:09:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2019-10-07 13:09:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-07 13:09:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-07 13:09:38,598 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-07 13:09:38,599 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-07 13:09:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:09:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-07 13:09:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 13:09:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-07 13:09:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-07 13:09:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 13:09:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-07 13:09:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-07 13:09:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-07 13:09:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-07 13:09:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 13:09:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-07 13:09:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-07 13:09:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-07 13:09:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-07 13:09:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-07 13:09:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-07 13:09:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-07 13:09:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-07 13:09:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-07 13:09:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2019-10-07 13:09:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc [2019-10-07 13:09:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2019-10-07 13:09:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2019-10-07 13:09:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2019-10-07 13:09:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-07 13:09:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_4 [2019-10-07 13:09:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_7 [2019-10-07 13:09:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_9 [2019-10-07 13:09:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_10 [2019-10-07 13:09:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2019-10-07 13:09:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2019-10-07 13:09:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kzalloc_1 [2019-10-07 13:09:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2019-10-07 13:09:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_usb_serial_driver_1 [2019-10-07 13:09:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_2 [2019-10-07 13:09:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2019-10-07 13:09:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2019-10-07 13:09:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 13:09:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2019-10-07 13:09:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2019-10-07 13:09:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_in [2019-10-07 13:09:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_out [2019-10-07 13:09:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure usb_enable_autosuspend [2019-10-07 13:09:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2019-10-07 13:09:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_register_driver_2 [2019-10-07 13:09:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register [2019-10-07 13:09:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 13:09:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2019-10-07 13:09:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_deregister_11 [2019-10-07 13:09:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2019-10-07 13:09:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_3 [2019-10-07 13:09:38,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_5 [2019-10-07 13:09:38,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_6 [2019-10-07 13:09:38,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_interface_8 [2019-10-07 13:09:38,647 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2019-10-07 13:09:38,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 13:09:38,647 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2019-10-07 13:09:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 13:09:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_register [2019-10-07 13:09:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2019-10-07 13:09:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2019-10-07 13:09:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2019-10-07 13:09:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2019-10-07 13:09:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2019-10-07 13:09:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2019-10-07 13:09:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2019-10-07 13:09:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_startup [2019-10-07 13:09:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2019-10-07 13:09:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_release [2019-10-07 13:09:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2019-10-07 13:09:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2019-10-07 13:09:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2019-10-07 13:09:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2019-10-07 13:09:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2019-10-07 13:09:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure qcprobe [2019-10-07 13:09:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 13:09:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure qc_release [2019-10-07 13:09:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure qcinit [2019-10-07 13:09:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure qcexit [2019-10-07 13:09:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_reset_resume_2 [2019-10-07 13:09:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-07 13:09:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-07 13:09:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:09:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-07 13:09:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-07 13:09:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 13:09:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:09:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-07 13:09:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-07 13:09:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:09:38,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 13:09:39,655 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-07 13:09:41,495 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:09:41,495 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-07 13:09:41,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:09:41 BoogieIcfgContainer [2019-10-07 13:09:41,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:09:41,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:09:41,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:09:41,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:09:41,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:09:36" (1/3) ... [2019-10-07 13:09:41,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b806169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:09:41, skipping insertion in model container [2019-10-07 13:09:41,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:09:38" (2/3) ... [2019-10-07 13:09:41,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b806169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:09:41, skipping insertion in model container [2019-10-07 13:09:41,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:09:41" (3/3) ... [2019-10-07 13:09:41,505 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 [2019-10-07 13:09:41,514 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:09:41,522 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:09:41,534 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:09:41,566 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:09:41,567 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:09:41,567 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:09:41,567 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:09:41,567 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:09:41,567 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:09:41,567 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:09:41,567 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:09:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states. [2019-10-07 13:09:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-07 13:09:41,625 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:09:41,626 INFO L385 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] [2019-10-07 13:09:41,628 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:09:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:09:41,634 INFO L82 PathProgramCache]: Analyzing trace with hash 394282032, now seen corresponding path program 1 times [2019-10-07 13:09:41,643 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:09:41,643 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:09:41,643 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:09:41,644 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:09:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:09:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:09:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-07 13:09:42,306 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:09:42,307 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:09:42,307 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 13:09:42,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 13:09:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 13:09:42,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 13:09:42,331 INFO L87 Difference]: Start difference. First operand 448 states. Second operand 3 states. [2019-10-07 13:09:42,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:09:42,805 INFO L93 Difference]: Finished difference Result 1214 states and 1590 transitions. [2019-10-07 13:09:42,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 13:09:42,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2019-10-07 13:09:42,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:09:42,850 INFO L225 Difference]: With dead ends: 1214 [2019-10-07 13:09:42,850 INFO L226 Difference]: Without dead ends: 778 [2019-10-07 13:09:42,864 INFO L606 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 [2019-10-07 13:09:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2019-10-07 13:09:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2019-10-07 13:09:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2019-10-07 13:09:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1012 transitions. [2019-10-07 13:09:43,022 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1012 transitions. Word has length 83 [2019-10-07 13:09:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:09:43,023 INFO L462 AbstractCegarLoop]: Abstraction has 778 states and 1012 transitions. [2019-10-07 13:09:43,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 13:09:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1012 transitions. [2019-10-07 13:09:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-07 13:09:43,032 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:09:43,032 INFO L385 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] [2019-10-07 13:09:43,032 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:09:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:09:43,033 INFO L82 PathProgramCache]: Analyzing trace with hash 226321823, now seen corresponding path program 1 times [2019-10-07 13:09:43,033 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:09:43,033 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:09:43,034 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:09:43,034 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:09:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:09:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:09:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-07 13:09:43,391 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:09:43,392 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:09:43,392 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 13:09:43,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 13:09:43,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 13:09:43,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 13:09:43,395 INFO L87 Difference]: Start difference. First operand 778 states and 1012 transitions. Second operand 3 states. [2019-10-07 13:09:43,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:09:43,507 INFO L93 Difference]: Finished difference Result 1501 states and 1981 transitions. [2019-10-07 13:09:43,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 13:09:43,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2019-10-07 13:09:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:09:43,529 INFO L225 Difference]: With dead ends: 1501 [2019-10-07 13:09:43,529 INFO L226 Difference]: Without dead ends: 1482 [2019-10-07 13:09:43,531 INFO L606 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 [2019-10-07 13:09:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2019-10-07 13:09:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1440. [2019-10-07 13:09:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2019-10-07 13:09:43,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1895 transitions. [2019-10-07 13:09:43,643 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1895 transitions. Word has length 81 [2019-10-07 13:09:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:09:43,645 INFO L462 AbstractCegarLoop]: Abstraction has 1440 states and 1895 transitions. [2019-10-07 13:09:43,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 13:09:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1895 transitions. [2019-10-07 13:09:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-07 13:09:43,662 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:09:43,663 INFO L385 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] [2019-10-07 13:09:43,664 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:09:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:09:43,664 INFO L82 PathProgramCache]: Analyzing trace with hash -521682506, now seen corresponding path program 1 times [2019-10-07 13:09:43,667 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:09:43,668 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:09:43,668 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:09:43,668 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:09:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:09:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:09:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-07 13:09:43,908 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:09:43,908 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:09:43,908 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 13:09:43,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 13:09:43,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 13:09:43,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 13:09:43,910 INFO L87 Difference]: Start difference. First operand 1440 states and 1895 transitions. Second operand 3 states. [2019-10-07 13:09:44,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:09:44,302 INFO L93 Difference]: Finished difference Result 3160 states and 4150 transitions. [2019-10-07 13:09:44,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 13:09:44,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-10-07 13:09:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:09:44,313 INFO L225 Difference]: With dead ends: 3160 [2019-10-07 13:09:44,313 INFO L226 Difference]: Without dead ends: 1747 [2019-10-07 13:09:44,318 INFO L606 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 [2019-10-07 13:09:44,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2019-10-07 13:09:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1728. [2019-10-07 13:09:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1728 states. [2019-10-07 13:09:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2266 transitions. [2019-10-07 13:09:44,402 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2266 transitions. Word has length 118 [2019-10-07 13:09:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:09:44,404 INFO L462 AbstractCegarLoop]: Abstraction has 1728 states and 2266 transitions. [2019-10-07 13:09:44,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 13:09:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2266 transitions. [2019-10-07 13:09:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-07 13:09:44,412 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:09:44,413 INFO L385 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] [2019-10-07 13:09:44,413 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:09:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:09:44,413 INFO L82 PathProgramCache]: Analyzing trace with hash -881599301, now seen corresponding path program 1 times [2019-10-07 13:09:44,414 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:09:44,414 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:09:44,414 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:09:44,414 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:09:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:09:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:09:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-10-07 13:09:44,689 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:09:44,689 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:09:44,689 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 13:09:44,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 13:09:44,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 13:09:44,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:09:44,691 INFO L87 Difference]: Start difference. First operand 1728 states and 2266 transitions. Second operand 5 states. [2019-10-07 13:09:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:09:44,951 INFO L93 Difference]: Finished difference Result 3662 states and 4760 transitions. [2019-10-07 13:09:44,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 13:09:44,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2019-10-07 13:09:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:09:44,964 INFO L225 Difference]: With dead ends: 3662 [2019-10-07 13:09:44,964 INFO L226 Difference]: Without dead ends: 1953 [2019-10-07 13:09:44,970 INFO L606 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 [2019-10-07 13:09:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2019-10-07 13:09:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1734. [2019-10-07 13:09:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1734 states. [2019-10-07 13:09:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2270 transitions. [2019-10-07 13:09:45,051 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2270 transitions. Word has length 166 [2019-10-07 13:09:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:09:45,051 INFO L462 AbstractCegarLoop]: Abstraction has 1734 states and 2270 transitions. [2019-10-07 13:09:45,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 13:09:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2270 transitions. [2019-10-07 13:09:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-07 13:09:45,057 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:09:45,057 INFO L385 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] [2019-10-07 13:09:45,058 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:09:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:09:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash 515293493, now seen corresponding path program 1 times [2019-10-07 13:09:45,058 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:09:45,058 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:09:45,059 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:09:45,059 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:09:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:09:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:09:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-07 13:09:45,680 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:09:45,680 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:09:45,680 INFO L95 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 [2019-10-07 13:09:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:09:46,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 3732 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-07 13:09:46,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:09:46,830 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 [2019-10-07 13:09:46,831 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-07 13:09:46,867 INFO L567 ElimStorePlain]: treesize reduction 4, result has 85.2 percent of original size [2019-10-07 13:09:46,867 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-10-07 13:09:46,868 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:23 [2019-10-07 13:09:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-07 13:09:47,442 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:09:47,612 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-07 13:09:48,896 WARN L191 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 204 DAG size of output: 86 [2019-10-07 13:09:49,113 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-07 13:09:49,354 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-07 13:09:49,635 WARN L191 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-10-07 13:09:49,893 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-07 13:09:50,126 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-07 13:09:50,417 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-10-07 13:09:50,649 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-07 13:09:50,880 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-07 13:09:51,110 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-07 13:09:51,372 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-10-07 13:09:51,618 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-07 13:09:51,876 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-07 13:09:52,145 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-10-07 13:09:52,403 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2019-10-07 13:09:52,698 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-07 13:09:53,844 WARN L191 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 204 DAG size of output: 85 [2019-10-07 13:09:54,099 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 13:09:54,330 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-07 13:09:54,539 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-10-07 13:09:54,753 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 13:09:54,977 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 13:09:55,218 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-10-07 13:09:55,461 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 13:09:55,711 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-07 13:09:55,947 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-07 13:09:56,205 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2019-10-07 13:09:56,435 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 13:09:56,653 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-07 13:09:56,890 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-07 13:09:57,160 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2019-10-07 13:09:57,445 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-07 13:09:58,579 WARN L191 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 204 DAG size of output: 85 [2019-10-07 13:09:58,780 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 13:09:59,001 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-07 13:09:59,216 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-10-07 13:09:59,424 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 13:09:59,667 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 13:09:59,889 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-10-07 13:10:00,090 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 13:10:00,314 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-07 13:10:00,540 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-07 13:10:00,774 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2019-10-07 13:10:00,976 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 13:10:01,188 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-07 13:10:01,408 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-07 13:10:01,540 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-07 13:10:02,736 WARN L191 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 204 DAG size of output: 84 [2019-10-07 13:10:02,936 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-07 13:10:03,152 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-07 13:10:03,348 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-07 13:10:03,559 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-07 13:10:03,769 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-07 13:10:03,993 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-10-07 13:10:04,195 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-07 13:10:04,403 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-07 13:10:04,616 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-07 13:10:04,748 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-07 13:10:05,814 WARN L191 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 80 [2019-10-07 13:10:05,960 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-07 13:10:06,123 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-07 13:10:06,268 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2019-10-07 13:10:06,437 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-07 13:10:06,591 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-10-07 13:10:06,727 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-10-07 13:10:07,844 WARN L191 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 204 DAG size of output: 84 [2019-10-07 13:10:08,060 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-07 13:10:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-07 13:10:08,233 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 13:10:08,233 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [15, 6] imperfect sequences [6] total 23 [2019-10-07 13:10:08,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-07 13:10:08,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-07 13:10:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2019-10-07 13:10:08,236 INFO L87 Difference]: Start difference. First operand 1734 states and 2270 transitions. Second operand 19 states. [2019-10-07 13:10:09,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:10:09,870 INFO L93 Difference]: Finished difference Result 2734 states and 3605 transitions. [2019-10-07 13:10:09,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-07 13:10:09,872 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 191 [2019-10-07 13:10:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:10:09,887 INFO L225 Difference]: With dead ends: 2734 [2019-10-07 13:10:09,887 INFO L226 Difference]: Without dead ends: 1836 [2019-10-07 13:10:09,892 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 363 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2019-10-07 13:10:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2019-10-07 13:10:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1746. [2019-10-07 13:10:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1746 states. [2019-10-07 13:10:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2282 transitions. [2019-10-07 13:10:09,996 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2282 transitions. Word has length 191 [2019-10-07 13:10:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:10:09,997 INFO L462 AbstractCegarLoop]: Abstraction has 1746 states and 2282 transitions. [2019-10-07 13:10:09,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-07 13:10:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2282 transitions. [2019-10-07 13:10:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-07 13:10:10,003 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:10:10,003 INFO L385 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] [2019-10-07 13:10:10,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:10:10,215 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:10:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:10:10,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1559019880, now seen corresponding path program 1 times [2019-10-07 13:10:10,216 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:10:10,216 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:10:10,216 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:10:10,216 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:10:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:10:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:10:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-07 13:10:10,571 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:10:10,573 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:10:10,573 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 13:10:10,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 13:10:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 13:10:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 13:10:10,575 INFO L87 Difference]: Start difference. First operand 1746 states and 2282 transitions. Second operand 3 states. [2019-10-07 13:10:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:10:10,924 INFO L93 Difference]: Finished difference Result 3964 states and 5261 transitions. [2019-10-07 13:10:10,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 13:10:10,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2019-10-07 13:10:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:10:10,941 INFO L225 Difference]: With dead ends: 3964 [2019-10-07 13:10:10,941 INFO L226 Difference]: Without dead ends: 2251 [2019-10-07 13:10:10,946 INFO L606 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 [2019-10-07 13:10:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2019-10-07 13:10:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2206. [2019-10-07 13:10:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2206 states. [2019-10-07 13:10:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 2851 transitions. [2019-10-07 13:10:11,034 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 2851 transitions. Word has length 191 [2019-10-07 13:10:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:10:11,036 INFO L462 AbstractCegarLoop]: Abstraction has 2206 states and 2851 transitions. [2019-10-07 13:10:11,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 13:10:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 2851 transitions. [2019-10-07 13:10:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-07 13:10:11,042 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:10:11,043 INFO L385 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] [2019-10-07 13:10:11,043 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:10:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:10:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1905539141, now seen corresponding path program 1 times [2019-10-07 13:10:11,044 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:10:11,044 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:10:11,044 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:10:11,044 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:10:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:10:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:10:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-07 13:10:11,493 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:10:11,493 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:10:11,493 INFO L95 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 [2019-10-07 13:10:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:10:13,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 3810 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-07 13:10:13,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:10:13,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:10:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-07 13:10:13,743 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:10:14,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:10:14,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:10:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-07 13:10:14,145 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 13:10:14,145 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2019-10-07 13:10:14,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 13:10:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 13:10:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-07 13:10:14,147 INFO L87 Difference]: Start difference. First operand 2206 states and 2851 transitions. Second operand 6 states. [2019-10-07 13:10:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:10:14,289 INFO L93 Difference]: Finished difference Result 4395 states and 5685 transitions. [2019-10-07 13:10:14,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 13:10:14,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 208 [2019-10-07 13:10:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:10:14,312 INFO L225 Difference]: With dead ends: 4395 [2019-10-07 13:10:14,313 INFO L226 Difference]: Without dead ends: 2207 [2019-10-07 13:10:14,319 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 409 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-10-07 13:10:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2019-10-07 13:10:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2207. [2019-10-07 13:10:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2207 states. [2019-10-07 13:10:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 2852 transitions. [2019-10-07 13:10:14,410 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 2852 transitions. Word has length 208 [2019-10-07 13:10:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:10:14,411 INFO L462 AbstractCegarLoop]: Abstraction has 2207 states and 2852 transitions. [2019-10-07 13:10:14,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 13:10:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 2852 transitions. [2019-10-07 13:10:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-10-07 13:10:14,418 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:10:14,419 INFO L385 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 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] [2019-10-07 13:10:14,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:10:14,632 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:10:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:10:14,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1191718954, now seen corresponding path program 1 times [2019-10-07 13:10:14,633 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:10:14,633 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:10:14,634 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:10:14,634 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:10:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:10:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:10:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-07 13:10:15,012 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:10:15,012 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:10:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:10:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:10:17,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 3828 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-07 13:10:17,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:10:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 92 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-07 13:10:17,238 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:10:17,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:10:17,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:10:17,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:10:17,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 13:10:21,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-07 13:10:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-07 13:10:21,595 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:10:21,626 INFO L162 IcfgInterpreter]: Started Sifa with 152 locations of interest [2019-10-07 13:10:21,626 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:10:21,637 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:10:21,644 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:10:21,644 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:10:49,764 WARN L191 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 3855 [2019-10-07 13:11:03,272 WARN L191 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 305 DAG size of output: 247 [2019-10-07 13:11:05,274 WARN L191 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 3907 [2019-10-07 13:11:07,294 WARN L191 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 3907 [2019-10-07 13:11:09,209 WARN L191 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 3907 [2019-10-07 13:11:11,564 WARN L191 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 4047 [2019-10-07 13:11:13,973 WARN L191 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 4047 [2019-10-07 13:11:16,493 WARN L191 SmtUtils]: Spent 2.51 s on a formula simplification that was a NOOP. DAG size: 4047 [2019-10-07 13:11:19,009 WARN L191 SmtUtils]: Spent 2.45 s on a formula simplification that was a NOOP. DAG size: 4047 [2019-10-07 13:11:23,722 WARN L191 SmtUtils]: Spent 4.68 s on a formula simplification. DAG size of input: 4049 DAG size of output: 4047 [2019-10-07 13:11:26,004 WARN L191 SmtUtils]: Spent 2.28 s on a formula simplification that was a NOOP. DAG size: 4047 [2019-10-07 13:11:28,543 WARN L191 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 4047 [2019-10-07 13:11:30,821 WARN L191 SmtUtils]: Spent 2.27 s on a formula simplification that was a NOOP. DAG size: 4047 [2019-10-07 13:11:33,077 WARN L191 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 4047 [2019-10-07 13:11:35,383 WARN L191 SmtUtils]: Spent 2.27 s on a formula simplification that was a NOOP. DAG size: 4047 [2019-10-07 13:11:35,440 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 310 for LOIs [2019-10-07 13:11:37,143 WARN L191 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 3846 [2019-10-07 13:11:38,710 WARN L191 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 3846 [2019-10-07 13:11:40,741 WARN L191 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 3986 [2019-10-07 13:11:40,744 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 4081 for LOIs [2019-10-07 13:11:43,001 WARN L191 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 4081 [2019-10-07 13:11:45,293 WARN L191 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 4081 [2019-10-07 13:11:47,859 WARN L191 SmtUtils]: Spent 2.51 s on a formula simplification that was a NOOP. DAG size: 4149 [2019-10-07 13:11:50,370 WARN L191 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 4111 [2019-10-07 13:11:52,698 WARN L191 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 4111 [2019-10-07 13:11:55,351 WARN L191 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 4185 [2019-10-07 13:13:03,685 WARN L191 SmtUtils]: Spent 12.57 s on a formula simplification that was a NOOP. DAG size: 1747 [2019-10-07 13:13:09,632 WARN L191 SmtUtils]: Spent 5.82 s on a formula simplification that was a NOOP. DAG size: 5410 [2019-10-07 13:13:38,841 WARN L191 SmtUtils]: Spent 5.72 s on a formula simplification that was a NOOP. DAG size: 5411 [2019-10-07 13:13:39,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:13:39,130 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 13:13:39,140 INFO L168 Benchmark]: Toolchain (without parser) took 242547.13 ms. Allocated memory was 143.1 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 95.1 MB in the beginning and 396.5 MB in the end (delta: -301.4 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2019-10-07 13:13:39,141 INFO L168 Benchmark]: CDTParser took 1.11 ms. Allocated memory is still 143.1 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 13:13:39,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1692.54 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 94.9 MB in the beginning and 107.9 MB in the end (delta: -13.0 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. [2019-10-07 13:13:39,147 INFO L168 Benchmark]: Boogie Preprocessor took 237.19 ms. Allocated memory is still 205.0 MB. Free memory was 107.9 MB in the beginning and 95.7 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2019-10-07 13:13:39,148 INFO L168 Benchmark]: RCFGBuilder took 2973.19 ms. Allocated memory was 205.0 MB in the beginning and 263.7 MB in the end (delta: 58.7 MB). Free memory was 95.7 MB in the beginning and 156.1 MB in the end (delta: -60.4 MB). Peak memory consumption was 78.6 MB. Max. memory is 7.1 GB. [2019-10-07 13:13:39,148 INFO L168 Benchmark]: TraceAbstraction took 237639.95 ms. Allocated memory was 263.7 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 156.1 MB in the beginning and 396.5 MB in the end (delta: -240.4 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2019-10-07 13:13:39,152 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.11 ms. Allocated memory is still 143.1 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1692.54 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 94.9 MB in the beginning and 107.9 MB in the end (delta: -13.0 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 237.19 ms. Allocated memory is still 205.0 MB. Free memory was 107.9 MB in the beginning and 95.7 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2973.19 ms. Allocated memory was 205.0 MB in the beginning and 263.7 MB in the end (delta: 58.7 MB). Free memory was 95.7 MB in the beginning and 156.1 MB in the end (delta: -60.4 MB). Peak memory consumption was 78.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237639.95 ms. Allocated memory was 263.7 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 156.1 MB in the beginning and 396.5 MB in the end (delta: -240.4 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...