/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--input--joystick--analog.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:51:22,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:51:22,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:51:22,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:51:22,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:51:22,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:51:22,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:51:22,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:51:22,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:51:22,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:51:22,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:51:22,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:51:22,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:51:22,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:51:22,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:51:22,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:51:22,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:51:22,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:51:22,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:51:22,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:51:22,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:51:22,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:51:22,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:51:22,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:51:22,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:51:22,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:51:22,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:51:22,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:51:22,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:51:22,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:51:22,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:51:22,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:51:22,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:51:22,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:51:22,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:51:22,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:51:22,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:51:22,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:51:22,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:51:22,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:51:22,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:51:22,696 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 11:51:22,719 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:51:22,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:51:22,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:51:22,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:51:22,721 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:51:22,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:51:22,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:51:22,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:51:22,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:51:22,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:51:22,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:51:22,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:51:22,723 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:51:22,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:51:22,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:51:22,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:51:22,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:51:22,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:51:22,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:51:22,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:51:22,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:51:22,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:51:22,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:51:22,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:51:22,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:51:22,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:51:22,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-18 11:51:22,726 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 [2020-08-18 11:51:23,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:51:23,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:51:23,043 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:51:23,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:51:23,045 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:51:23,045 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--input--joystick--analog.ko-entry_point.cil.out.i [2020-08-18 11:51:23,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0160f7fe4/7a059214ed674debaac81e78d6b227a7/FLAGb44613a2c [2020-08-18 11:51:23,809 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:51:23,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--input--joystick--analog.ko-entry_point.cil.out.i [2020-08-18 11:51:23,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0160f7fe4/7a059214ed674debaac81e78d6b227a7/FLAGb44613a2c [2020-08-18 11:51:24,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0160f7fe4/7a059214ed674debaac81e78d6b227a7 [2020-08-18 11:51:24,128 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:51:24,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:51:24,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:51:24,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:51:24,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:51:24,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:51:24" (1/1) ... [2020-08-18 11:51:24,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff3ebf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:24, skipping insertion in model container [2020-08-18 11:51:24,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:51:24" (1/1) ... [2020-08-18 11:51:24,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:51:24,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:51:24,754 WARN L1191 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [2539] [2020-08-18 11:51:24,754 WARN L1191 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [2540-2541] [2020-08-18 11:51:25,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:51:25,479 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:51:25,553 WARN L1191 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [2539] [2020-08-18 11:51:25,554 WARN L1191 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [2540-2541] [2020-08-18 11:51:25,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:51:25,892 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:51:25,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:25 WrapperNode [2020-08-18 11:51:25,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:51:25,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:51:25,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:51:25,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:51:25,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:25" (1/1) ... [2020-08-18 11:51:25,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:25" (1/1) ... [2020-08-18 11:51:26,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:25" (1/1) ... [2020-08-18 11:51:26,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:25" (1/1) ... [2020-08-18 11:51:26,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:25" (1/1) ... [2020-08-18 11:51:26,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:25" (1/1) ... [2020-08-18 11:51:26,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:25" (1/1) ... [2020-08-18 11:51:26,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:51:26,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:51:26,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:51:26,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:51:26,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:25" (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 11:51:26,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:51:26,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:51:26,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 11:51:26,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2020-08-18 11:51:26,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2020-08-18 11:51:26,273 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2020-08-18 11:51:26,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __arch_hweight32 [2020-08-18 11:51:26,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __arch_hweight16 [2020-08-18 11:51:26,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __arch_hweight8 [2020-08-18 11:51:26,273 INFO L138 BoogieDeclarations]: Found implementation of procedure paravirt_read_tsc [2020-08-18 11:51:26,273 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_save_flags [2020-08-18 11:51:26,273 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2020-08-18 11:51:26,274 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_disable [2020-08-18 11:51:26,274 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_save [2020-08-18 11:51:26,274 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_irqs_disabled_flags [2020-08-18 11:51:26,274 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2020-08-18 11:51:26,274 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2020-08-18 11:51:26,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 11:51:26,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-18 11:51:26,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-18 11:51:26,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-18 11:51:26,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-18 11:51:26,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-18 11:51:26,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-18 11:51:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2020-08-18 11:51:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2020-08-18 11:51:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2020-08-18 11:51:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2020-08-18 11:51:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure input_allocate_device [2020-08-18 11:51:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure input_get_drvdata [2020-08-18 11:51:26,277 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_drvdata [2020-08-18 11:51:26,277 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2020-08-18 11:51:26,277 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_abs [2020-08-18 11:51:26,277 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2020-08-18 11:51:26,277 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_get_drvdata [2020-08-18 11:51:26,277 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_set_drvdata [2020-08-18 11:51:26,278 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_trigger [2020-08-18 11:51:26,278 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_read [2020-08-18 11:51:26,278 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_cooked_read [2020-08-18 11:51:26,278 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_calibrate [2020-08-18 11:51:26,278 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_time [2020-08-18 11:51:26,279 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_set_poll_handler [2020-08-18 11:51:26,279 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_set_poll_interval [2020-08-18 11:51:26,279 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_decode [2020-08-18 11:51:26,279 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_cooked_read [2020-08-18 11:51:26,279 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_button_read [2020-08-18 11:51:26,279 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_poll [2020-08-18 11:51:26,280 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_open [2020-08-18 11:51:26,280 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_close [2020-08-18 11:51:26,280 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_calibrate_timer [2020-08-18 11:51:26,280 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_name [2020-08-18 11:51:26,280 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_init_device [2020-08-18 11:51:26,280 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_init_masks [2020-08-18 11:51:26,281 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_init_port [2020-08-18 11:51:26,281 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_connect [2020-08-18 11:51:26,281 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_disconnect [2020-08-18 11:51:26,281 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_parse_options [2020-08-18 11:51:26,281 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_init [2020-08-18 11:51:26,281 INFO L138 BoogieDeclarations]: Found implementation of procedure analog_exit [2020-08-18 11:51:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_gameport_driver_1 [2020-08-18 11:51:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:51:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-08-18 11:51:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2020-08-18 11:51:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags_and_return_some_page [2020-08-18 11:51:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_nonatomic [2020-08-18 11:51:26,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2020-08-18 11:51:26,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2020-08-18 11:51:26,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_trylock [2020-08-18 11:51:26,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2020-08-18 11:51:26,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __gameport_register_driver [2020-08-18 11:51:26,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __udelay [2020-08-18 11:51:26,283 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_close [2020-08-18 11:51:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_open [2020-08-18 11:51:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_start_polling [2020-08-18 11:51:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_stop_polling [2020-08-18 11:51:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_unregister_driver [2020-08-18 11:51:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2020-08-18 11:51:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure input_free_device [2020-08-18 11:51:26,285 INFO L138 BoogieDeclarations]: Found implementation of procedure input_register_device [2020-08-18 11:51:26,285 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2020-08-18 11:51:26,285 INFO L138 BoogieDeclarations]: Found implementation of procedure input_unregister_device [2020-08-18 11:51:26,285 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_alloc [2020-08-18 11:51:26,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_bind_1 [2020-08-18 11:51:26,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-18 11:51:26,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-18 11:51:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_1 [2020-08-18 11:51:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_some_page [2020-08-18 11:51:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2020-08-18 11:51:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2020-08-18 11:51:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2020-08-18 11:51:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2020-08-18 11:51:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2020-08-18 11:51:26,287 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_on [2020-08-18 11:51:26,287 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-18 11:51:26,287 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-18 11:51:26,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:51:26,287 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2020-08-18 11:51:26,287 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2020-08-18 11:51:26,288 INFO L130 BoogieDeclarations]: Found specification of procedure __arch_hweight32 [2020-08-18 11:51:26,288 INFO L130 BoogieDeclarations]: Found specification of procedure __arch_hweight16 [2020-08-18 11:51:26,288 INFO L130 BoogieDeclarations]: Found specification of procedure __arch_hweight8 [2020-08-18 11:51:26,288 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2020-08-18 11:51:26,288 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2020-08-18 11:51:26,288 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-08-18 11:51:26,288 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-18 11:51:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-18 11:51:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2020-08-18 11:51:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure paravirt_read_tsc [2020-08-18 11:51:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 11:51:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_save_flags [2020-08-18 11:51:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2020-08-18 11:51:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_disable [2020-08-18 11:51:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_save [2020-08-18 11:51:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure arch_irqs_disabled_flags [2020-08-18 11:51:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_on [2020-08-18 11:51:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2020-08-18 11:51:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2020-08-18 11:51:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2020-08-18 11:51:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-18 11:51:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc [2020-08-18 11:51:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-08-18 11:51:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2020-08-18 11:51:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 11:51:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 11:51:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:51:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-18 11:51:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 11:51:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 11:51:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-18 11:51:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 11:51:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-18 11:51:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-18 11:51:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-18 11:51:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-18 11:51:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-18 11:51:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-18 11:51:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2020-08-18 11:51:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_gameport_driver_1 [2020-08-18 11:51:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure __udelay [2020-08-18 11:51:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2020-08-18 11:51:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2020-08-18 11:51:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2020-08-18 11:51:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2020-08-18 11:51:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 11:51:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure input_allocate_device [2020-08-18 11:51:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure input_free_device [2020-08-18 11:51:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure input_get_drvdata [2020-08-18 11:51:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_drvdata [2020-08-18 11:51:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure input_register_device [2020-08-18 11:51:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure input_unregister_device [2020-08-18 11:51:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2020-08-18 11:51:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2020-08-18 11:51:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_abs [2020-08-18 11:51:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2020-08-18 11:51:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2020-08-18 11:51:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_open [2020-08-18 11:51:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_close [2020-08-18 11:51:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_get_drvdata [2020-08-18 11:51:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_set_drvdata [2020-08-18 11:51:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure __gameport_register_driver [2020-08-18 11:51:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_unregister_driver [2020-08-18 11:51:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_trigger [2020-08-18 11:51:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 11:51:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:51:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_read [2020-08-18 11:51:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2020-08-18 11:51:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_cooked_read [2020-08-18 11:51:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2020-08-18 11:51:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_calibrate [2020-08-18 11:51:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_time [2020-08-18 11:51:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_set_poll_handler [2020-08-18 11:51:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_set_poll_interval [2020-08-18 11:51:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:51:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_start_polling [2020-08-18 11:51:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_stop_polling [2020-08-18 11:51:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure analog_decode [2020-08-18 11:51:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure analog_cooked_read [2020-08-18 11:51:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:51:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:51:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure analog_button_read [2020-08-18 11:51:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure analog_poll [2020-08-18 11:51:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure analog_open [2020-08-18 11:51:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure analog_close [2020-08-18 11:51:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure analog_calibrate_timer [2020-08-18 11:51:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure analog_name [2020-08-18 11:51:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure analog_init_device [2020-08-18 11:51:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure analog_init_masks [2020-08-18 11:51:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure analog_init_port [2020-08-18 11:51:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure analog_connect [2020-08-18 11:51:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure analog_disconnect [2020-08-18 11:51:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure analog_parse_options [2020-08-18 11:51:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure analog_init [2020-08-18 11:51:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure analog_exit [2020-08-18 11:51:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-18 11:51:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-18 11:51:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_1 [2020-08-18 11:51:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_bind_1 [2020-08-18 11:51:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:51:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_some_page [2020-08-18 11:51:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags_and_return_some_page [2020-08-18 11:51:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_nonatomic [2020-08-18 11:51:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2020-08-18 11:51:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2020-08-18 11:51:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_trylock [2020-08-18 11:51:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 11:51:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:51:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 11:51:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-18 11:51:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:51:26,982 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-18 11:51:28,534 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:51:28,534 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 11:51:28,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:51:28 BoogieIcfgContainer [2020-08-18 11:51:28,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:51:28,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:51:28,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:51:28,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:51:28,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:51:24" (1/3) ... [2020-08-18 11:51:28,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f530487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:51:28, skipping insertion in model container [2020-08-18 11:51:28,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:51:25" (2/3) ... [2020-08-18 11:51:28,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f530487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:51:28, skipping insertion in model container [2020-08-18 11:51:28,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:51:28" (3/3) ... [2020-08-18 11:51:28,551 INFO L109 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--input--joystick--analog.ko-entry_point.cil.out.i [2020-08-18 11:51:28,563 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:51:28,572 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:51:28,588 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:51:28,616 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:51:28,616 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:51:28,616 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:51:28,616 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:51:28,617 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:51:28,617 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:51:28,617 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:51:28,617 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:51:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states. [2020-08-18 11:51:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 11:51:28,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:51:28,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 11:51:28,672 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:51:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:51:28,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2058672228, now seen corresponding path program 1 times [2020-08-18 11:51:28,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:51:28,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880255896] [2020-08-18 11:51:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:51:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:29,694 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-08-18 11:51:29,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:51:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:29,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:51:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:29,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:51:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:51:29,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880255896] [2020-08-18 11:51:29,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:51:29,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:51:29,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403692046] [2020-08-18 11:51:29,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:51:29,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:51:29,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:51:29,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:51:29,808 INFO L87 Difference]: Start difference. First operand 791 states. Second operand 5 states. [2020-08-18 11:51:30,575 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 264 [2020-08-18 11:51:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:51:38,217 INFO L93 Difference]: Finished difference Result 1648 states and 2166 transitions. [2020-08-18 11:51:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 11:51:38,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-18 11:51:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:51:38,256 INFO L225 Difference]: With dead ends: 1648 [2020-08-18 11:51:38,257 INFO L226 Difference]: Without dead ends: 834 [2020-08-18 11:51:38,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:51:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2020-08-18 11:51:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 803. [2020-08-18 11:51:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-18 11:51:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1039 transitions. [2020-08-18 11:51:38,484 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1039 transitions. Word has length 30 [2020-08-18 11:51:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:51:38,484 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1039 transitions. [2020-08-18 11:51:38,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:51:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1039 transitions. [2020-08-18 11:51:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 11:51:38,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:51:38,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:51:38,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:51:38,488 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:51:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:51:38,489 INFO L82 PathProgramCache]: Analyzing trace with hash 229024885, now seen corresponding path program 1 times [2020-08-18 11:51:38,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:51:38,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450742123] [2020-08-18 11:51:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:51:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:39,031 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-08-18 11:51:39,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:51:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:39,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:51:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:39,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:51:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:39,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 11:51:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:39,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:51:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:39,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 11:51:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:39,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 11:51:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:39,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:51:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:51:39,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450742123] [2020-08-18 11:51:39,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:51:39,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:51:39,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044045706] [2020-08-18 11:51:39,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:51:39,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:51:39,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:51:39,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:51:39,272 INFO L87 Difference]: Start difference. First operand 803 states and 1039 transitions. Second operand 7 states. [2020-08-18 11:51:45,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:51:45,016 INFO L93 Difference]: Finished difference Result 1640 states and 2144 transitions. [2020-08-18 11:51:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:51:45,018 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-08-18 11:51:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:51:45,024 INFO L225 Difference]: With dead ends: 1640 [2020-08-18 11:51:45,025 INFO L226 Difference]: Without dead ends: 864 [2020-08-18 11:51:45,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:51:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2020-08-18 11:51:45,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 807. [2020-08-18 11:51:45,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 807 states. [2020-08-18 11:51:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1045 transitions. [2020-08-18 11:51:45,140 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1045 transitions. Word has length 65 [2020-08-18 11:51:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:51:45,141 INFO L479 AbstractCegarLoop]: Abstraction has 807 states and 1045 transitions. [2020-08-18 11:51:45,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:51:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1045 transitions. [2020-08-18 11:51:45,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 11:51:45,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:51:45,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:51:45,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:51:45,145 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:51:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:51:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash 780245369, now seen corresponding path program 1 times [2020-08-18 11:51:45,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:51:45,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002798248] [2020-08-18 11:51:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:51:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:45,605 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-08-18 11:51:45,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:51:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:45,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:51:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:45,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:51:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:45,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 11:51:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:45,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:51:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:45,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:51:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:45,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 11:51:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:45,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:51:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:51:45,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002798248] [2020-08-18 11:51:45,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:51:45,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 11:51:45,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287820868] [2020-08-18 11:51:45,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:51:45,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:51:45,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:51:45,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:51:45,771 INFO L87 Difference]: Start difference. First operand 807 states and 1045 transitions. Second operand 8 states. [2020-08-18 11:51:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:51:52,266 INFO L93 Difference]: Finished difference Result 1674 states and 2194 transitions. [2020-08-18 11:51:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 11:51:52,267 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-08-18 11:51:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:51:52,274 INFO L225 Difference]: With dead ends: 1674 [2020-08-18 11:51:52,274 INFO L226 Difference]: Without dead ends: 894 [2020-08-18 11:51:52,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:51:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-08-18 11:51:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 837. [2020-08-18 11:51:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2020-08-18 11:51:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1089 transitions. [2020-08-18 11:51:52,397 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1089 transitions. Word has length 67 [2020-08-18 11:51:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:51:52,398 INFO L479 AbstractCegarLoop]: Abstraction has 837 states and 1089 transitions. [2020-08-18 11:51:52,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:51:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1089 transitions. [2020-08-18 11:51:52,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 11:51:52,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:51:52,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:51:52,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:51:52,403 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:51:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:51:52,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2072814211, now seen corresponding path program 2 times [2020-08-18 11:51:52,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:51:52,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621500783] [2020-08-18 11:51:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:51:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:52,908 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-08-18 11:51:52,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:51:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:52,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:51:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:52,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:51:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:52,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 11:51:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:52,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:51:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:53,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:51:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:53,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 11:51:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:53,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:51:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:51:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:51:53,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621500783] [2020-08-18 11:51:53,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:51:53,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:51:53,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055020496] [2020-08-18 11:51:53,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:51:53,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:51:53,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:51:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:51:53,104 INFO L87 Difference]: Start difference. First operand 837 states and 1089 transitions. Second operand 9 states. [2020-08-18 11:52:01,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:52:01,203 INFO L93 Difference]: Finished difference Result 1734 states and 2282 transitions. [2020-08-18 11:52:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:52:01,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-08-18 11:52:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:52:01,210 INFO L225 Difference]: With dead ends: 1734 [2020-08-18 11:52:01,210 INFO L226 Difference]: Without dead ends: 924 [2020-08-18 11:52:01,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:52:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2020-08-18 11:52:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 867. [2020-08-18 11:52:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2020-08-18 11:52:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1133 transitions. [2020-08-18 11:52:01,321 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1133 transitions. Word has length 69 [2020-08-18 11:52:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:52:01,322 INFO L479 AbstractCegarLoop]: Abstraction has 867 states and 1133 transitions. [2020-08-18 11:52:01,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:52:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1133 transitions. [2020-08-18 11:52:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 11:52:01,324 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:52:01,324 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:52:01,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:52:01,325 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:52:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:52:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash 621031553, now seen corresponding path program 3 times [2020-08-18 11:52:01,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:52:01,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659452663] [2020-08-18 11:52:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:52:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:01,782 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-08-18 11:52:01,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:52:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:01,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:52:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:01,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:52:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:01,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 11:52:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:01,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:52:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:01,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 11:52:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:01,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 11:52:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:01,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:52:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:52:01,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659452663] [2020-08-18 11:52:01,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:52:01,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:52:01,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835260062] [2020-08-18 11:52:01,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:52:01,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:52:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:52:01,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:52:01,985 INFO L87 Difference]: Start difference. First operand 867 states and 1133 transitions. Second operand 10 states. [2020-08-18 11:52:08,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:52:08,044 INFO L93 Difference]: Finished difference Result 1794 states and 2370 transitions. [2020-08-18 11:52:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:52:08,046 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-08-18 11:52:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:52:08,052 INFO L225 Difference]: With dead ends: 1794 [2020-08-18 11:52:08,052 INFO L226 Difference]: Without dead ends: 954 [2020-08-18 11:52:08,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:52:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-08-18 11:52:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 897. [2020-08-18 11:52:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-08-18 11:52:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1177 transitions. [2020-08-18 11:52:08,178 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1177 transitions. Word has length 71 [2020-08-18 11:52:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:52:08,179 INFO L479 AbstractCegarLoop]: Abstraction has 897 states and 1177 transitions. [2020-08-18 11:52:08,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:52:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1177 transitions. [2020-08-18 11:52:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 11:52:08,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:52:08,181 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:52:08,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:52:08,181 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:52:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:52:08,182 INFO L82 PathProgramCache]: Analyzing trace with hash -458468731, now seen corresponding path program 4 times [2020-08-18 11:52:08,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:52:08,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497162615] [2020-08-18 11:52:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:52:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:08,640 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-08-18 11:52:08,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:52:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:08,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:52:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:08,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:52:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:08,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 11:52:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:08,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:52:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:08,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 11:52:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:08,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 11:52:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:08,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:52:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:52:08,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497162615] [2020-08-18 11:52:08,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:52:08,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 11:52:08,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159169882] [2020-08-18 11:52:08,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:52:08,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:52:08,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:52:08,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:52:08,902 INFO L87 Difference]: Start difference. First operand 897 states and 1177 transitions. Second operand 11 states. [2020-08-18 11:52:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:52:17,697 INFO L93 Difference]: Finished difference Result 1854 states and 2458 transitions. [2020-08-18 11:52:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:52:17,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-08-18 11:52:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:52:17,707 INFO L225 Difference]: With dead ends: 1854 [2020-08-18 11:52:17,707 INFO L226 Difference]: Without dead ends: 984 [2020-08-18 11:52:17,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:52:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2020-08-18 11:52:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 927. [2020-08-18 11:52:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2020-08-18 11:52:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1221 transitions. [2020-08-18 11:52:17,840 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1221 transitions. Word has length 73 [2020-08-18 11:52:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:52:17,842 INFO L479 AbstractCegarLoop]: Abstraction has 927 states and 1221 transitions. [2020-08-18 11:52:17,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:52:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1221 transitions. [2020-08-18 11:52:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 11:52:17,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:52:17,844 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:52:17,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:52:17,845 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:52:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:52:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1523843977, now seen corresponding path program 5 times [2020-08-18 11:52:17,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:52:17,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407596009] [2020-08-18 11:52:17,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:52:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:18,329 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-08-18 11:52:18,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:52:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:18,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:52:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:18,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:52:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:18,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 11:52:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:18,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:52:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:18,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 11:52:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:18,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 11:52:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:18,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:52:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:52:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 11:52:18,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407596009] [2020-08-18 11:52:18,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:52:18,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 11:52:18,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483285915] [2020-08-18 11:52:18,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 11:52:18,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:52:18,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 11:52:18,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:52:18,588 INFO L87 Difference]: Start difference. First operand 927 states and 1221 transitions. Second operand 12 states.