/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:23:59,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:23:59,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:23:59,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:23:59,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:23:59,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:23:59,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:23:59,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:23:59,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:23:59,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:23:59,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:23:59,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:23:59,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:23:59,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:23:59,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:23:59,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:23:59,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:23:59,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:23:59,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:23:59,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:23:59,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:23:59,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:23:59,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:23:59,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:23:59,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:23:59,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:23:59,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:23:59,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:23:59,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:23:59,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:23:59,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:23:59,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:23:59,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:23:59,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:23:59,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:23:59,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:23:59,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:23:59,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:23:59,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:23:59,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:23:59,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:23:59,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2020-08-18 18:23:59,359 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:23:59,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:23:59,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:23:59,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:23:59,361 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:23:59,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:23:59,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:23:59,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:23:59,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:23:59,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:23:59,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:23:59,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:23:59,362 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:23:59,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:23:59,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:23:59,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:23:59,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:23:59,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:23:59,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:23:59,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:23:59,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:23:59,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:23:59,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:23:59,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:23:59,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:23:59,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:23:59,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-18 18:23:59,365 INFO L138 SettingsManager]: * To the following directory=dump/ Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:23:59,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:23:59,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:23:59,700 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:23:59,702 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:23:59,702 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:23:59,703 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-18 18:23:59,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0261e99b6/457d25ef5b114f85b76004dd6d68e420/FLAG3ca553143 [2020-08-18 18:24:00,563 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:24:00,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-18 18:24:00,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0261e99b6/457d25ef5b114f85b76004dd6d68e420/FLAG3ca553143 [2020-08-18 18:24:01,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0261e99b6/457d25ef5b114f85b76004dd6d68e420 [2020-08-18 18:24:01,122 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:24:01,124 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:24:01,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:24:01,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:24:01,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:24:01,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:24:01" (1/1) ... [2020-08-18 18:24:01,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35246ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:01, skipping insertion in model container [2020-08-18 18:24:01,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:24:01" (1/1) ... [2020-08-18 18:24:01,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:24:01,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:24:02,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:24:02,835 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:24:03,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:24:03,306 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:24:03,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:03 WrapperNode [2020-08-18 18:24:03,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:24:03,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:24:03,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:24:03,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:24:03,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:03" (1/1) ... [2020-08-18 18:24:03,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:03" (1/1) ... [2020-08-18 18:24:03,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:03" (1/1) ... [2020-08-18 18:24:03,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:03" (1/1) ... [2020-08-18 18:24:03,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:03" (1/1) ... [2020-08-18 18:24:03,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:03" (1/1) ... [2020-08-18 18:24:03,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:03" (1/1) ... [2020-08-18 18:24:03,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:24:03,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:24:03,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:24:03,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:24:03,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 18:24:03,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:24:03,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:24:03,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 18:24:03,622 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2020-08-18 18:24:03,622 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2020-08-18 18:24:03,623 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-08-18 18:24:03,625 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-08-18 18:24:03,626 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-08-18 18:24:03,626 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 18:24:03,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-18 18:24:03,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-18 18:24:03,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-18 18:24:03,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-18 18:24:03,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-18 18:24:03,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-18 18:24:03,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2020-08-18 18:24:03,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2020-08-18 18:24:03,634 INFO L138 BoogieDeclarations]: Found implementation of procedure to_spi_device [2020-08-18 18:24:03,634 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_set_drvdata [2020-08-18 18:24:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_get_drvdata [2020-08-18 18:24:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_unregister_driver [2020-08-18 18:24:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_init [2020-08-18 18:24:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_add_tail [2020-08-18 18:24:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_reset [2020-08-18 18:24:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_init [2020-08-18 18:24:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_read_busy [2020-08-18 18:24:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_read [2020-08-18 18:24:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_write [2020-08-18 18:24:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_probe [2020-08-18 18:24:03,637 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_remove [2020-08-18 18:24:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_init [2020-08-18 18:24:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_exit [2020-08-18 18:24:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-18 18:24:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_spi_driver_1 [2020-08-18 18:24:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:24:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2020-08-18 18:24:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata [2020-08-18 18:24:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata [2020-08-18 18:24:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_put_intf [2020-08-18 18:24:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2020-08-18 18:24:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_int_urb [2020-08-18 18:24:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_bulk_urb [2020-08-18 18:24:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-08-18 18:24:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_dev [2020-08-18 18:24:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2020-08-18 18:24:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2020-08-18 18:24:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2020-08-18 18:24:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_register [2020-08-18 18:24:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_deregister [2020-08-18 18:24:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-18 18:24:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2020-08-18 18:24:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure crc7 [2020-08-18 18:24:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2020-08-18 18:24:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2020-08-18 18:24:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2020-08-18 18:24:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2020-08-18 18:24:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-18 18:24:03,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_2 [2020-08-18 18:24:03,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_setup_2 [2020-08-18 18:24:03,643 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add [2020-08-18 18:24:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_data [2020-08-18 18:24:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_resources [2020-08-18 18:24:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_alloc [2020-08-18 18:24:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_put [2020-08-18 18:24:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2020-08-18 18:24:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_register_driver [2020-08-18 18:24:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_setup [2020-08-18 18:24:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_sync [2020-08-18 18:24:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2020-08-18 18:24:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-18 18:24:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-08-18 18:24:03,646 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-18 18:24:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:24:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2020-08-18 18:24:03,647 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-08-18 18:24:03,647 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2020-08-18 18:24:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2020-08-18 18:24:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 18:24:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2020-08-18 18:24:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2020-08-18 18:24:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 18:24:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2020-08-18 18:24:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2020-08-18 18:24:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2020-08-18 18:24:03,650 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2020-08-18 18:24:03,650 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-18 18:24:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-18 18:24:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-08-18 18:24:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-08-18 18:24:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-18 18:24:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-08-18 18:24:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 18:24:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 18:24:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:24:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_size_t [2020-08-18 18:24:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-18 18:24:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 18:24:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 18:24:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 18:24:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-18 18:24:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-18 18:24:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-18 18:24:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-18 18:24:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-18 18:24:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2020-08-18 18:24:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-18 18:24:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_spi_driver_1 [2020-08-18 18:24:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure crc7 [2020-08-18 18:24:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure to_spi_device [2020-08-18 18:24:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure spi_set_drvdata [2020-08-18 18:24:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure spi_get_drvdata [2020-08-18 18:24:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure spi_register_driver [2020-08-18 18:24:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure spi_unregister_driver [2020-08-18 18:24:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_init [2020-08-18 18:24:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-08-18 18:24:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_add_tail [2020-08-18 18:24:03,656 INFO L130 BoogieDeclarations]: Found specification of procedure spi_setup [2020-08-18 18:24:03,657 INFO L130 BoogieDeclarations]: Found specification of procedure spi_sync [2020-08-18 18:24:03,657 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2020-08-18 18:24:03,657 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_alloc [2020-08-18 18:24:03,658 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_resources [2020-08-18 18:24:03,658 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_data [2020-08-18 18:24:03,659 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add [2020-08-18 18:24:03,659 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_put [2020-08-18 18:24:03,659 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_reset [2020-08-18 18:24:03,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 18:24:03,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 18:24:03,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 18:24:03,660 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_init [2020-08-18 18:24:03,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 18:24:03,722 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_read_busy [2020-08-18 18:24:03,722 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_read [2020-08-18 18:24:03,722 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_write [2020-08-18 18:24:03,722 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_probe [2020-08-18 18:24:03,722 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_remove [2020-08-18 18:24:03,722 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_init [2020-08-18 18:24:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_exit [2020-08-18 18:24:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-18 18:24:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_2 [2020-08-18 18:24:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-18 18:24:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_setup_2 [2020-08-18 18:24:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:24:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2020-08-18 18:24:03,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata [2020-08-18 18:24:03,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata [2020-08-18 18:24:03,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_put_intf [2020-08-18 18:24:03,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2020-08-18 18:24:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_int_urb [2020-08-18 18:24:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_bulk_urb [2020-08-18 18:24:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-08-18 18:24:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 18:24:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_dev [2020-08-18 18:24:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2020-08-18 18:24:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2020-08-18 18:24:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2020-08-18 18:24:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_register [2020-08-18 18:24:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_deregister [2020-08-18 18:24:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-18 18:24:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 18:24:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:24:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 18:24:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-18 18:24:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:24:04,803 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-18 18:24:05,395 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2020-08-18 18:24:05,874 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:24:05,874 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:24:05,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:24:05 BoogieIcfgContainer [2020-08-18 18:24:05,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:24:05,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:24:05,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:24:05,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:24:05,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:24:01" (1/3) ... [2020-08-18 18:24:05,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632f8958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:24:05, skipping insertion in model container [2020-08-18 18:24:05,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:24:03" (2/3) ... [2020-08-18 18:24:05,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632f8958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:24:05, skipping insertion in model container [2020-08-18 18:24:05,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:24:05" (3/3) ... [2020-08-18 18:24:05,891 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-18 18:24:05,901 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:24:05,910 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:24:05,926 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:24:05,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:24:05,955 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:24:05,955 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:24:05,956 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:24:05,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:24:05,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:24:05,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:24:05,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:24:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states. [2020-08-18 18:24:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 18:24:05,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:24:06,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:24:06,000 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:24:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:24:06,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2051707004, now seen corresponding path program 1 times [2020-08-18 18:24:06,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:24:06,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972823843] [2020-08-18 18:24:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:24:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:06,923 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:24:06,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:24:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:06,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:24:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:06,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:24:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:07,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:24:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:07,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:24:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:07,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 18:24:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:07,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 18:24:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:07,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:24:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 18:24:07,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972823843] [2020-08-18 18:24:07,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:24:07,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:24:07,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132950200] [2020-08-18 18:24:07,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:24:07,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:24:07,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:24:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:24:07,143 INFO L87 Difference]: Start difference. First operand 469 states. Second operand 7 states. [2020-08-18 18:24:07,508 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 18:24:08,230 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-18 18:24:08,551 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-08-18 18:24:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:24:14,098 INFO L93 Difference]: Finished difference Result 945 states and 1293 transitions. [2020-08-18 18:24:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:24:14,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-18 18:24:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:24:14,123 INFO L225 Difference]: With dead ends: 945 [2020-08-18 18:24:14,124 INFO L226 Difference]: Without dead ends: 492 [2020-08-18 18:24:14,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:24:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-08-18 18:24:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 437. [2020-08-18 18:24:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-08-18 18:24:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 559 transitions. [2020-08-18 18:24:14,265 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 559 transitions. Word has length 52 [2020-08-18 18:24:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:24:14,266 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 559 transitions. [2020-08-18 18:24:14,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:24:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 559 transitions. [2020-08-18 18:24:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 18:24:14,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:24:14,271 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:24:14,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:24:14,272 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:24:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:24:14,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1503436246, now seen corresponding path program 1 times [2020-08-18 18:24:14,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:24:14,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147031274] [2020-08-18 18:24:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:24:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:14,667 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:24:14,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:24:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:14,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:24:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:14,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:24:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:14,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:24:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:14,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:24:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:14,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:24:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:14,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 18:24:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:14,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:24:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 18:24:14,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147031274] [2020-08-18 18:24:14,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:24:14,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:24:14,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365119888] [2020-08-18 18:24:14,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:24:14,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:24:14,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:24:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:24:14,865 INFO L87 Difference]: Start difference. First operand 437 states and 559 transitions. Second operand 6 states. [2020-08-18 18:24:15,173 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 18:24:15,950 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 18:24:17,293 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:24:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:24:23,728 INFO L93 Difference]: Finished difference Result 1313 states and 1710 transitions. [2020-08-18 18:24:23,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:24:23,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-08-18 18:24:23,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:24:23,742 INFO L225 Difference]: With dead ends: 1313 [2020-08-18 18:24:23,742 INFO L226 Difference]: Without dead ends: 893 [2020-08-18 18:24:23,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:24:23,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2020-08-18 18:24:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 796. [2020-08-18 18:24:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2020-08-18 18:24:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1025 transitions. [2020-08-18 18:24:23,863 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1025 transitions. Word has length 54 [2020-08-18 18:24:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:24:23,864 INFO L479 AbstractCegarLoop]: Abstraction has 796 states and 1025 transitions. [2020-08-18 18:24:23,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:24:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1025 transitions. [2020-08-18 18:24:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 18:24:23,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:24:23,868 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:24:23,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:24:23,868 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:24:23,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:24:23,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1632677837, now seen corresponding path program 1 times [2020-08-18 18:24:23,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:24:23,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736087246] [2020-08-18 18:24:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:24:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:24,313 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:24:24,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:24:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:24,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:24:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:24,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:24:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:24,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:24:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:24,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:24:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:24,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:24:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:24,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 18:24:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:24,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:24:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 18:24:24,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736087246] [2020-08-18 18:24:24,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:24:24,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:24:24,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125496861] [2020-08-18 18:24:24,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:24:24,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:24:24,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:24:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:24:24,604 INFO L87 Difference]: Start difference. First operand 796 states and 1025 transitions. Second operand 6 states. [2020-08-18 18:24:24,959 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 18:24:25,329 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-18 18:24:25,651 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 18:24:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:24:31,529 INFO L93 Difference]: Finished difference Result 895 states and 1170 transitions. [2020-08-18 18:24:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:24:31,530 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-08-18 18:24:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:24:31,537 INFO L225 Difference]: With dead ends: 895 [2020-08-18 18:24:31,538 INFO L226 Difference]: Without dead ends: 892 [2020-08-18 18:24:31,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:24:31,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-08-18 18:24:31,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 795. [2020-08-18 18:24:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-08-18 18:24:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1023 transitions. [2020-08-18 18:24:31,628 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1023 transitions. Word has length 58 [2020-08-18 18:24:31,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:24:31,629 INFO L479 AbstractCegarLoop]: Abstraction has 795 states and 1023 transitions. [2020-08-18 18:24:31,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:24:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1023 transitions. [2020-08-18 18:24:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 18:24:31,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:24:31,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:24:31,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:24:31,632 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:24:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:24:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 926229248, now seen corresponding path program 1 times [2020-08-18 18:24:31,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:24:31,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276864154] [2020-08-18 18:24:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:24:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:32,126 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:24:32,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:24:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:32,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:24:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:32,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:24:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:32,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:24:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:32,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:24:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:32,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:24:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:32,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 18:24:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:32,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:24:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 18:24:32,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276864154] [2020-08-18 18:24:32,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:24:32,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:24:32,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012617586] [2020-08-18 18:24:32,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:24:32,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:24:32,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:24:32,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:24:32,325 INFO L87 Difference]: Start difference. First operand 795 states and 1023 transitions. Second operand 6 states. [2020-08-18 18:24:32,596 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 18:24:32,952 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-18 18:24:33,266 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 18:24:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:24:40,536 INFO L93 Difference]: Finished difference Result 894 states and 1168 transitions. [2020-08-18 18:24:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:24:40,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-08-18 18:24:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:24:40,543 INFO L225 Difference]: With dead ends: 894 [2020-08-18 18:24:40,543 INFO L226 Difference]: Without dead ends: 891 [2020-08-18 18:24:40,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:24:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-08-18 18:24:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 794. [2020-08-18 18:24:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-08-18 18:24:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1021 transitions. [2020-08-18 18:24:40,640 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1021 transitions. Word has length 59 [2020-08-18 18:24:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:24:40,641 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 1021 transitions. [2020-08-18 18:24:40,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:24:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1021 transitions. [2020-08-18 18:24:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 18:24:40,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:24:40,647 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:24:40,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:24:40,648 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:24:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:24:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1352024874, now seen corresponding path program 1 times [2020-08-18 18:24:40,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:24:40,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656887752] [2020-08-18 18:24:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:24:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:41,047 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:24:41,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:24:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:41,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:24:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:41,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:24:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:41,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:24:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:41,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:24:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:41,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:24:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:41,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 18:24:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:41,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:24:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 18:24:41,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656887752] [2020-08-18 18:24:41,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:24:41,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:24:41,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966235215] [2020-08-18 18:24:41,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:24:41,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:24:41,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:24:41,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:24:41,292 INFO L87 Difference]: Start difference. First operand 794 states and 1021 transitions. Second operand 6 states. [2020-08-18 18:24:41,678 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 18:24:42,059 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 18:24:42,403 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:24:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:24:48,854 INFO L93 Difference]: Finished difference Result 893 states and 1166 transitions. [2020-08-18 18:24:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:24:48,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-18 18:24:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:24:48,861 INFO L225 Difference]: With dead ends: 893 [2020-08-18 18:24:48,861 INFO L226 Difference]: Without dead ends: 890 [2020-08-18 18:24:48,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:24:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-18 18:24:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 793. [2020-08-18 18:24:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2020-08-18 18:24:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1019 transitions. [2020-08-18 18:24:48,944 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1019 transitions. Word has length 60 [2020-08-18 18:24:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:24:48,945 INFO L479 AbstractCegarLoop]: Abstraction has 793 states and 1019 transitions. [2020-08-18 18:24:48,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:24:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1019 transitions. [2020-08-18 18:24:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 18:24:48,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:24:48,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:24:48,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:24:48,947 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:24:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:24:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1036546243, now seen corresponding path program 1 times [2020-08-18 18:24:48,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:24:48,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916092944] [2020-08-18 18:24:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:24:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:49,291 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:24:49,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:24:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:49,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:24:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:49,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:24:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:49,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:24:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:49,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:24:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:49,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:24:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:49,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 18:24:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:49,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:24:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 18:24:49,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916092944] [2020-08-18 18:24:49,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:24:49,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:24:49,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421019230] [2020-08-18 18:24:49,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:24:49,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:24:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:24:49,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:24:49,436 INFO L87 Difference]: Start difference. First operand 793 states and 1019 transitions. Second operand 6 states. [2020-08-18 18:24:49,739 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 18:24:50,127 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 18:24:50,535 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:24:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:24:57,109 INFO L93 Difference]: Finished difference Result 892 states and 1164 transitions. [2020-08-18 18:24:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:24:57,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 18:24:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:24:57,116 INFO L225 Difference]: With dead ends: 892 [2020-08-18 18:24:57,116 INFO L226 Difference]: Without dead ends: 889 [2020-08-18 18:24:57,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:24:57,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-08-18 18:24:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 792. [2020-08-18 18:24:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-18 18:24:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1017 transitions. [2020-08-18 18:24:57,197 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1017 transitions. Word has length 61 [2020-08-18 18:24:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:24:57,198 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1017 transitions. [2020-08-18 18:24:57,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:24:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1017 transitions. [2020-08-18 18:24:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 18:24:57,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:24:57,200 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:24:57,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:24:57,200 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:24:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:24:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2067811705, now seen corresponding path program 1 times [2020-08-18 18:24:57,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:24:57,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134516049] [2020-08-18 18:24:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:24:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:57,572 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:24:57,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:24:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:57,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:24:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:57,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:24:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:57,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:24:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:57,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:24:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:57,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:24:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:57,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 18:24:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:57,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:24:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:24:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 18:24:57,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134516049] [2020-08-18 18:24:57,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:24:57,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:24:57,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859075680] [2020-08-18 18:24:57,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:24:57,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:24:57,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:24:57,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:24:57,699 INFO L87 Difference]: Start difference. First operand 792 states and 1017 transitions. Second operand 6 states. [2020-08-18 18:24:57,988 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 18:24:58,383 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 18:24:58,709 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 189