/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product49.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:34:14,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:34:14,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:34:14,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:34:14,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:34:14,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:34:14,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:34:14,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:34:14,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:34:14,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:34:14,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:34:14,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:34:14,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:34:14,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:34:14,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:34:14,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:34:14,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:34:14,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:34:14,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:34:14,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:34:14,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:34:14,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:34:14,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:34:14,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:34:14,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:34:14,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:34:14,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:34:14,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:34:14,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:34:14,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:34:14,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:34:14,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:34:14,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:34:14,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:34:14,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:34:14,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:34:14,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:34:14,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:34:14,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:34:14,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:34:14,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:34:14,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 18:34:14,211 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:34:14,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:34:14,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:34:14,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:34:14,213 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:34:14,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:34:14,214 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:34:14,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:34:14,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:34:14,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:34:14,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:34:14,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:34:14,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:34:14,215 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:34:14,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:34:14,215 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:34:14,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:34:14,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:34:14,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:34:14,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:34:14,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:34:14,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:34:14,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:34:14,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:34:14,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:34:14,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:34:14,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:34:14,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:34:14,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:34:14,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:34:14,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:34:14,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:34:14,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:34:14,538 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:34:14,539 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:34:14,540 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product49.cil.c [2020-08-18 18:34:14,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccf8fab25/e0849d967dae453d8f750e38e71de0c5/FLAG0b9a73062 [2020-08-18 18:34:15,058 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:34:15,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product49.cil.c [2020-08-18 18:34:15,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccf8fab25/e0849d967dae453d8f750e38e71de0c5/FLAG0b9a73062 [2020-08-18 18:34:15,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccf8fab25/e0849d967dae453d8f750e38e71de0c5 [2020-08-18 18:34:15,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:34:15,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:34:15,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:34:15,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:34:15,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:34:15,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:34:15" (1/1) ... [2020-08-18 18:34:15,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a47163c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:15, skipping insertion in model container [2020-08-18 18:34:15,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:34:15" (1/1) ... [2020-08-18 18:34:15,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:34:15,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:34:16,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:34:16,045 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:34:16,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:34:16,187 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:34:16,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:16 WrapperNode [2020-08-18 18:34:16,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:34:16,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:34:16,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:34:16,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:34:16,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:16" (1/1) ... [2020-08-18 18:34:16,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:16" (1/1) ... [2020-08-18 18:34:16,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:16" (1/1) ... [2020-08-18 18:34:16,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:16" (1/1) ... [2020-08-18 18:34:16,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:16" (1/1) ... [2020-08-18 18:34:16,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:16" (1/1) ... [2020-08-18 18:34:16,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:16" (1/1) ... [2020-08-18 18:34:16,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:34:16,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:34:16,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:34:16,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:34:16,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:16" (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 18:34:16,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:34:16,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:34:16,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 18:34:16,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 18:34:16,356 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 18:34:16,356 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 18:34:16,356 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 18:34:16,356 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 18:34:16,356 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 18:34:16,357 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 18:34:16,357 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 18:34:16,357 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 18:34:16,357 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 18:34:16,357 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 18:34:16,357 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 18:34:16,358 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 18:34:16,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:34:16,358 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 18:34:16,358 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 18:34:16,358 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 18:34:16,358 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 18:34:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 18:34:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 18:34:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 18:34:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 18:34:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 18:34:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 18:34:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 18:34:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 18:34:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 18:34:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 18:34:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 18:34:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 18:34:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-18 18:34:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 18:34:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 18:34:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 18:34:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 18:34:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 18:34:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 18:34:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:34:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:34:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 18:34:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 18:34:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 18:34:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 18:34:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 18:34:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 18:34:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 18:34:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 18:34:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 18:34:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 18:34:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 18:34:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 18:34:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 18:34:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 18:34:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 18:34:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 18:34:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 18:34:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 18:34:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 18:34:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 18:34:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 18:34:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:34:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 18:34:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 18:34:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 18:34:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-18 18:34:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 18:34:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 18:34:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 18:34:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 18:34:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 18:34:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 18:34:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 18:34:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 18:34:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 18:34:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 18:34:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 18:34:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 18:34:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 18:34:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 18:34:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 18:34:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 18:34:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 18:34:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 18:34:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 18:34:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 18:34:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 18:34:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 18:34:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 18:34:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:34:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 18:34:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:34:17,573 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:34:17,573 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 18:34:17,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:34:17 BoogieIcfgContainer [2020-08-18 18:34:17,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:34:17,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:34:17,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:34:17,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:34:17,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:34:15" (1/3) ... [2020-08-18 18:34:17,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b9716e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:34:17, skipping insertion in model container [2020-08-18 18:34:17,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:16" (2/3) ... [2020-08-18 18:34:17,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b9716e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:34:17, skipping insertion in model container [2020-08-18 18:34:17,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:34:17" (3/3) ... [2020-08-18 18:34:17,587 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product49.cil.c [2020-08-18 18:34:17,597 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:34:17,605 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:34:17,620 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:34:17,643 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:34:17,643 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:34:17,643 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:34:17,644 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:34:17,644 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:34:17,644 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:34:17,644 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:34:17,644 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:34:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states. [2020-08-18 18:34:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 18:34:17,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:17,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:34:17,678 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:17,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:17,685 INFO L82 PathProgramCache]: Analyzing trace with hash 916136138, now seen corresponding path program 1 times [2020-08-18 18:34:17,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:17,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824296034] [2020-08-18 18:34:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:18,345 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:18,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:18,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:18,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:18,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:18,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:34:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:18,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 18:34:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:18,425 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 18:34:18,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824296034] [2020-08-18 18:34:18,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:34:18,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:34:18,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788083937] [2020-08-18 18:34:18,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:34:18,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:18,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:34:18,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:34:18,458 INFO L87 Difference]: Start difference. First operand 171 states. Second operand 3 states. [2020-08-18 18:34:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:19,710 INFO L93 Difference]: Finished difference Result 297 states and 388 transitions. [2020-08-18 18:34:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:34:19,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 18:34:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:19,730 INFO L225 Difference]: With dead ends: 297 [2020-08-18 18:34:19,731 INFO L226 Difference]: Without dead ends: 160 [2020-08-18 18:34:19,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:34:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-18 18:34:19,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 128. [2020-08-18 18:34:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-08-18 18:34:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2020-08-18 18:34:19,889 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 46 [2020-08-18 18:34:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:19,890 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2020-08-18 18:34:19,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:34:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2020-08-18 18:34:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 18:34:19,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:19,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:34:19,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:34:19,898 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:19,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1104947330, now seen corresponding path program 1 times [2020-08-18 18:34:19,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:19,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987686232] [2020-08-18 18:34:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:20,258 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:20,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:20,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:20,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:20,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:20,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:20,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 18:34:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:20,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 18:34:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:20,322 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 18:34:20,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987686232] [2020-08-18 18:34:20,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:34:20,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:34:20,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101961283] [2020-08-18 18:34:20,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:34:20,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:20,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:34:20,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:34:20,326 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand 4 states. [2020-08-18 18:34:20,764 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:21,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:21,516 INFO L93 Difference]: Finished difference Result 230 states and 279 transitions. [2020-08-18 18:34:21,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:34:21,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 18:34:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:21,519 INFO L225 Difference]: With dead ends: 230 [2020-08-18 18:34:21,519 INFO L226 Difference]: Without dead ends: 144 [2020-08-18 18:34:21,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:34:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-18 18:34:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 119. [2020-08-18 18:34:21,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-18 18:34:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2020-08-18 18:34:21,557 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 47 [2020-08-18 18:34:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:21,557 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2020-08-18 18:34:21,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:34:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2020-08-18 18:34:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 18:34:21,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:21,570 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:34:21,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:34:21,570 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:21,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1852359913, now seen corresponding path program 1 times [2020-08-18 18:34:21,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:21,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370807578] [2020-08-18 18:34:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:21,943 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:21,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:21,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:21,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:21,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:21,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:21,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:34:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:21,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 18:34:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:22,006 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 18:34:22,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370807578] [2020-08-18 18:34:22,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:34:22,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:34:22,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153454540] [2020-08-18 18:34:22,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:34:22,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:22,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:34:22,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:34:22,009 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand 8 states. [2020-08-18 18:34:22,397 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:22,687 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:22,924 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:23,179 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:24,252 INFO L93 Difference]: Finished difference Result 239 states and 293 transitions. [2020-08-18 18:34:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:34:24,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 18:34:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:24,254 INFO L225 Difference]: With dead ends: 239 [2020-08-18 18:34:24,255 INFO L226 Difference]: Without dead ends: 144 [2020-08-18 18:34:24,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:34:24,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-18 18:34:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 119. [2020-08-18 18:34:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-18 18:34:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2020-08-18 18:34:24,293 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 51 [2020-08-18 18:34:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:24,294 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2020-08-18 18:34:24,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:34:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2020-08-18 18:34:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-18 18:34:24,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:24,295 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:24,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:34:24,296 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:24,296 INFO L82 PathProgramCache]: Analyzing trace with hash 458129541, now seen corresponding path program 1 times [2020-08-18 18:34:24,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:24,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746334532] [2020-08-18 18:34:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,593 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:24,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 18:34:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 18:34:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 18:34:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:24,678 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 18:34:24,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746334532] [2020-08-18 18:34:24,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:34:24,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:34:24,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395816402] [2020-08-18 18:34:24,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:34:24,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:24,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:34:24,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:34:24,681 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand 6 states. [2020-08-18 18:34:25,052 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:26,145 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:26,811 INFO L93 Difference]: Finished difference Result 331 states and 409 transitions. [2020-08-18 18:34:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:34:26,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-08-18 18:34:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:26,816 INFO L225 Difference]: With dead ends: 331 [2020-08-18 18:34:26,816 INFO L226 Difference]: Without dead ends: 236 [2020-08-18 18:34:26,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:34:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-18 18:34:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 195. [2020-08-18 18:34:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-18 18:34:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 222 transitions. [2020-08-18 18:34:26,860 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 222 transitions. Word has length 64 [2020-08-18 18:34:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:26,860 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 222 transitions. [2020-08-18 18:34:26,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:34:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 222 transitions. [2020-08-18 18:34:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 18:34:26,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:26,862 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:26,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:34:26,863 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:26,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1170867649, now seen corresponding path program 1 times [2020-08-18 18:34:26,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:26,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456841738] [2020-08-18 18:34:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,180 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:27,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 18:34:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:34:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 18:34:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 18:34:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:27,321 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 18:34:27,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456841738] [2020-08-18 18:34:27,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:34:27,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 18:34:27,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029041049] [2020-08-18 18:34:27,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:34:27,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:27,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:34:27,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:34:27,324 INFO L87 Difference]: Start difference. First operand 195 states and 222 transitions. Second operand 12 states. [2020-08-18 18:34:27,807 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:28,168 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:28,422 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:28,655 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:29,170 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:29,983 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:30,264 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 18:34:30,519 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 18:34:30,753 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:31,052 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 18:34:31,308 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 18:34:32,559 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:32,912 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:33,526 INFO L93 Difference]: Finished difference Result 677 states and 879 transitions. [2020-08-18 18:34:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 18:34:33,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-08-18 18:34:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:33,532 INFO L225 Difference]: With dead ends: 677 [2020-08-18 18:34:33,533 INFO L226 Difference]: Without dead ends: 506 [2020-08-18 18:34:33,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-18 18:34:33,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-18 18:34:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 448. [2020-08-18 18:34:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-18 18:34:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 529 transitions. [2020-08-18 18:34:33,628 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 529 transitions. Word has length 78 [2020-08-18 18:34:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:33,629 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 529 transitions. [2020-08-18 18:34:33,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 18:34:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 529 transitions. [2020-08-18 18:34:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 18:34:33,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:33,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:33,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:34:33,632 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash 524664374, now seen corresponding path program 1 times [2020-08-18 18:34:33,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:33,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49593605] [2020-08-18 18:34:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:33,899 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:33,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:33,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:33,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:33,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:33,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:34:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:34:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:34:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:34:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 18:34:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:34:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 18:34:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:34:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-18 18:34:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-18 18:34:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 18:34:34,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49593605] [2020-08-18 18:34:34,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:34:34,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:34:34,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605161055] [2020-08-18 18:34:34,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:34:34,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:34,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:34:34,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:34:34,227 INFO L87 Difference]: Start difference. First operand 448 states and 529 transitions. Second operand 13 states. [2020-08-18 18:34:34,760 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:35,391 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:35,912 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:36,211 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 18:34:36,484 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:36,746 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:36,988 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:37,265 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 18:34:37,581 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:37,888 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:39,535 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:39,786 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:40,033 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:40,285 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:40,820 INFO L93 Difference]: Finished difference Result 904 states and 1154 transitions. [2020-08-18 18:34:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 18:34:40,821 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-08-18 18:34:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:40,827 INFO L225 Difference]: With dead ends: 904 [2020-08-18 18:34:40,827 INFO L226 Difference]: Without dead ends: 480 [2020-08-18 18:34:40,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 18:34:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-08-18 18:34:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 418. [2020-08-18 18:34:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-08-18 18:34:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 497 transitions. [2020-08-18 18:34:40,923 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 497 transitions. Word has length 136 [2020-08-18 18:34:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:40,923 INFO L479 AbstractCegarLoop]: Abstraction has 418 states and 497 transitions. [2020-08-18 18:34:40,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:34:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 497 transitions. [2020-08-18 18:34:40,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-18 18:34:40,926 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:40,926 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:40,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:34:40,927 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:40,927 INFO L82 PathProgramCache]: Analyzing trace with hash -532032326, now seen corresponding path program 1 times [2020-08-18 18:34:40,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:40,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195818329] [2020-08-18 18:34:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,202 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:41,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:34:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:34:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:34:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:34:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 18:34:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:34:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 18:34:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-18 18:34:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 18:34:41,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195818329] [2020-08-18 18:34:41,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:34:41,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 18:34:41,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918878665] [2020-08-18 18:34:41,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:34:41,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:41,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:34:41,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:34:41,456 INFO L87 Difference]: Start difference. First operand 418 states and 497 transitions. Second operand 12 states. [2020-08-18 18:34:42,189 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:42,431 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:42,668 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:43,211 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:43,457 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:43,696 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:44,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:44,585 INFO L93 Difference]: Finished difference Result 761 states and 937 transitions. [2020-08-18 18:34:44,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 18:34:44,586 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 128 [2020-08-18 18:34:44,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:44,593 INFO L225 Difference]: With dead ends: 761 [2020-08-18 18:34:44,593 INFO L226 Difference]: Without dead ends: 367 [2020-08-18 18:34:44,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 18:34:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-08-18 18:34:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 343. [2020-08-18 18:34:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-18 18:34:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 405 transitions. [2020-08-18 18:34:44,664 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 405 transitions. Word has length 128 [2020-08-18 18:34:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:44,664 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 405 transitions. [2020-08-18 18:34:44,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 18:34:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 405 transitions. [2020-08-18 18:34:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-18 18:34:44,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:44,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:44,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:34:44,667 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash 759278389, now seen corresponding path program 1 times [2020-08-18 18:34:44,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:44,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719427189] [2020-08-18 18:34:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,966 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:44,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:34:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:34:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:34:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:34:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 18:34:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 18:34:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:34:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 18:34:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-18 18:34:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 18:34:45,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719427189] [2020-08-18 18:34:45,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:34:45,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:34:45,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430186256] [2020-08-18 18:34:45,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:34:45,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:34:45,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:34:45,174 INFO L87 Difference]: Start difference. First operand 343 states and 405 transitions. Second operand 10 states. [2020-08-18 18:34:46,955 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:47,200 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 18:34:47,448 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:47,691 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:48,030 INFO L93 Difference]: Finished difference Result 632 states and 772 transitions. [2020-08-18 18:34:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:34:48,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 132 [2020-08-18 18:34:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:48,035 INFO L225 Difference]: With dead ends: 632 [2020-08-18 18:34:48,035 INFO L226 Difference]: Without dead ends: 372 [2020-08-18 18:34:48,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:34:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-08-18 18:34:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 348. [2020-08-18 18:34:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-08-18 18:34:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 410 transitions. [2020-08-18 18:34:48,107 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 410 transitions. Word has length 132 [2020-08-18 18:34:48,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:48,108 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 410 transitions. [2020-08-18 18:34:48,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:34:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 410 transitions. [2020-08-18 18:34:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-18 18:34:48,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:48,110 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:48,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:34:48,111 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash 249805299, now seen corresponding path program 1 times [2020-08-18 18:34:48,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:48,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407928240] [2020-08-18 18:34:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,380 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:48,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:34:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:34:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:34:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:34:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 18:34:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 18:34:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:34:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 18:34:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-18 18:34:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 18:34:48,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407928240] [2020-08-18 18:34:48,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:34:48,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:34:48,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742434902] [2020-08-18 18:34:48,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:34:48,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:34:48,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:34:48,567 INFO L87 Difference]: Start difference. First operand 348 states and 410 transitions. Second operand 10 states. [2020-08-18 18:34:49,031 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:50,440 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:50,699 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:50,940 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:51,168 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:51,424 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:51,687 INFO L93 Difference]: Finished difference Result 379 states and 458 transitions. [2020-08-18 18:34:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 18:34:51,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 132 [2020-08-18 18:34:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:51,690 INFO L225 Difference]: With dead ends: 379 [2020-08-18 18:34:51,691 INFO L226 Difference]: Without dead ends: 376 [2020-08-18 18:34:51,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:34:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-18 18:34:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 348. [2020-08-18 18:34:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-08-18 18:34:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 409 transitions. [2020-08-18 18:34:51,755 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 409 transitions. Word has length 132 [2020-08-18 18:34:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:51,756 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 409 transitions. [2020-08-18 18:34:51,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:34:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 409 transitions. [2020-08-18 18:34:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 18:34:51,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:51,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:51,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:34:51,759 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:51,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1295460868, now seen corresponding path program 1 times [2020-08-18 18:34:51,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:51,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105806166] [2020-08-18 18:34:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,117 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:52,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:34:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:34:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:34:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:34:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 18:34:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 18:34:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:34:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-18 18:34:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-18 18:34:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 18:34:52,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105806166] [2020-08-18 18:34:52,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:34:52,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 18:34:52,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170625960] [2020-08-18 18:34:52,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:34:52,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:52,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:34:52,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:34:52,326 INFO L87 Difference]: Start difference. First operand 348 states and 409 transitions. Second operand 12 states. [2020-08-18 18:34:53,078 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:53,649 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:54,366 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:54,640 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:54,876 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:55,109 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:55,373 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:55,634 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:56,694 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:57,445 INFO L93 Difference]: Finished difference Result 832 states and 1064 transitions. [2020-08-18 18:34:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 18:34:57,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2020-08-18 18:34:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:57,452 INFO L225 Difference]: With dead ends: 832 [2020-08-18 18:34:57,452 INFO L226 Difference]: Without dead ends: 567 [2020-08-18 18:34:57,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-08-18 18:34:57,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2020-08-18 18:34:57,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 483. [2020-08-18 18:34:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-08-18 18:34:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 575 transitions. [2020-08-18 18:34:57,542 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 575 transitions. Word has length 136 [2020-08-18 18:34:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:57,543 INFO L479 AbstractCegarLoop]: Abstraction has 483 states and 575 transitions. [2020-08-18 18:34:57,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 18:34:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 575 transitions. [2020-08-18 18:34:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-08-18 18:34:57,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:57,547 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:34:57,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:34:57,547 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1491934830, now seen corresponding path program 2 times [2020-08-18 18:34:57,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:57,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853756975] [2020-08-18 18:34:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,899 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:57,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:34:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:34:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:34:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:34:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 18:34:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:34:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:34:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-18 18:34:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-18 18:34:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:34:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:34:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:34:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 18:34:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 18:34:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 46 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-08-18 18:34:58,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853756975] [2020-08-18 18:34:58,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:34:58,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:34:58,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031907610] [2020-08-18 18:34:58,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:34:58,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:34:58,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:34:58,283 INFO L87 Difference]: Start difference. First operand 483 states and 575 transitions. Second operand 13 states. [2020-08-18 18:34:59,399 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:59,651 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:35:01,134 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-18 18:35:01,384 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:35:01,616 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:35:02,052 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 186 [2020-08-18 18:35:03,612 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 189 [2020-08-18 18:35:03,886 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-08-18 18:35:04,182 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 18:35:04,432 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 18:35:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:35:05,363 INFO L93 Difference]: Finished difference Result 1322 states and 1661 transitions. [2020-08-18 18:35:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 18:35:05,364 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 189 [2020-08-18 18:35:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:35:05,387 INFO L225 Difference]: With dead ends: 1322 [2020-08-18 18:35:05,387 INFO L226 Difference]: Without dead ends: 920 [2020-08-18 18:35:05,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=299, Invalid=961, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 18:35:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-08-18 18:35:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 789. [2020-08-18 18:35:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 789 states. [2020-08-18 18:35:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 924 transitions. [2020-08-18 18:35:05,513 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 924 transitions. Word has length 189 [2020-08-18 18:35:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:35:05,514 INFO L479 AbstractCegarLoop]: Abstraction has 789 states and 924 transitions. [2020-08-18 18:35:05,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:35:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 924 transitions. [2020-08-18 18:35:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-08-18 18:35:05,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:35:05,517 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:35:05,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:35:05,518 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:35:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:35:05,518 INFO L82 PathProgramCache]: Analyzing trace with hash 384547988, now seen corresponding path program 1 times [2020-08-18 18:35:05,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:35:05,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420986600] [2020-08-18 18:35:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:35:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,808 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:35:05,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:35:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:35:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:35:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:35:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:35:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:35:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:35:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:35:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 18:35:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:35:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:35:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:35:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:05,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:06,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-18 18:35:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:06,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-18 18:35:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:06,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:06,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:06,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:35:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:06,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:06,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 18:35:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:06,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 18:35:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-08-18 18:35:06,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420986600] [2020-08-18 18:35:06,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:35:06,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:35:06,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086010238] [2020-08-18 18:35:06,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:35:06,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:35:06,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:35:06,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:35:06,051 INFO L87 Difference]: Start difference. First operand 789 states and 924 transitions. Second operand 13 states. [2020-08-18 18:35:06,618 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:06,865 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:07,105 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:08,252 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:08,486 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:35:08,779 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:09,014 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:09,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:35:09,299 INFO L93 Difference]: Finished difference Result 1041 states and 1226 transitions. [2020-08-18 18:35:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:35:09,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 189 [2020-08-18 18:35:09,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:35:09,300 INFO L225 Difference]: With dead ends: 1041 [2020-08-18 18:35:09,300 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:35:09,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:35:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:35:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:35:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:35:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:35:09,305 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2020-08-18 18:35:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:35:09,305 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:35:09,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:35:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:35:09,306 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:35:09,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:35:09,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:35:10,997 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 269 DAG size of output: 246 [2020-08-18 18:35:12,043 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 248