/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:24:36,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:24:36,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:24:36,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:24:36,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:24:36,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:24:36,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:24:36,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:24:36,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:24:36,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:24:36,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:24:36,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:24:36,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:24:36,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:24:36,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:24:36,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:24:36,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:24:36,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:24:36,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:24:36,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:24:36,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:24:36,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:24:36,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:24:36,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:24:36,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:24:36,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:24:36,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:24:36,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:24:36,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:24:36,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 23:24:36,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 23:24:36,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 23:24:36,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 23:24:36,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 23:24:36,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 23:24:36,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 23:24:36,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 23:24:36,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 23:24:36,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:24:36,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:24:36,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:24:36,302 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 23:24:36,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:24:36,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:24:36,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:24:36,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:24:36,326 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:24:36,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:24:36,326 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:24:36,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:24:36,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:24:36,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:24:36,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:24:36,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:24:36,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:24:36,327 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:24:36,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:24:36,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:24:36,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:24:36,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:24:36,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:24:36,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:24:36,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:24:36,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:24:36,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:24:36,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:24:36,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:24:36,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:24:36,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:24:36,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:24:36,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:24:36,331 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=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:24:36,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:24:36,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:24:36,669 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:24:36,671 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:24:36,671 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:24:36,672 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-18 23:24:36,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3d21889f/a6b40fd82c384d46b5037947849aa84f/FLAG1174dcf8f [2020-08-18 23:24:37,285 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:24:37,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-18 23:24:37,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3d21889f/a6b40fd82c384d46b5037947849aa84f/FLAG1174dcf8f [2020-08-18 23:24:37,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3d21889f/a6b40fd82c384d46b5037947849aa84f [2020-08-18 23:24:37,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:24:37,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:24:37,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:24:37,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:24:37,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:24:37,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:24:37" (1/1) ... [2020-08-18 23:24:37,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11967da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:37, skipping insertion in model container [2020-08-18 23:24:37,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:24:37" (1/1) ... [2020-08-18 23:24:37,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:24:37,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:24:38,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:24:38,166 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:24:38,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:24:38,326 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:24:38,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:38 WrapperNode [2020-08-18 23:24:38,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:24:38,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:24:38,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:24:38,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:24:38,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:38" (1/1) ... [2020-08-18 23:24:38,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:38" (1/1) ... [2020-08-18 23:24:38,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:38" (1/1) ... [2020-08-18 23:24:38,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:38" (1/1) ... [2020-08-18 23:24:38,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:38" (1/1) ... [2020-08-18 23:24:38,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:38" (1/1) ... [2020-08-18 23:24:38,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:38" (1/1) ... [2020-08-18 23:24:38,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:24:38,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:24:38,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:24:38,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:24:38,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:38" (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 23:24:38,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:24:38,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:24:38,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 23:24:38,482 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 23:24:38,482 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 23:24:38,482 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 23:24:38,483 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 23:24:38,483 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 23:24:38,483 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 23:24:38,483 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 23:24:38,483 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 23:24:38,483 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 23:24:38,484 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 23:24:38,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 23:24:38,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 23:24:38,484 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 23:24:38,484 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 23:24:38,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 23:24:38,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 23:24:38,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 23:24:38,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 23:24:38,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 23:24:38,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 23:24:38,485 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 23:24:38,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-18 23:24:38,486 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 23:24:38,486 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 23:24:38,486 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 23:24:38,486 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 23:24:38,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:24:38,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 23:24:38,487 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 23:24:38,488 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 23:24:38,488 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 23:24:38,488 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 23:24:38,488 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 23:24:38,488 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 23:24:38,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 23:24:38,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 23:24:38,489 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 23:24:38,489 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 23:24:38,489 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 23:24:38,489 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 23:24:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:24:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:24:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 23:24:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 23:24:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 23:24:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 23:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 23:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 23:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 23:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 23:24:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 23:24:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 23:24:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 23:24:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 23:24:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 23:24:38,493 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-18 23:24:38,493 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 23:24:38,493 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 23:24:38,493 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 23:24:38,493 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 23:24:38,493 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 23:24:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 23:24:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 23:24:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 23:24:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 23:24:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 23:24:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 23:24:38,495 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 23:24:38,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 23:24:38,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 23:24:38,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 23:24:38,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 23:24:38,495 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 23:24:38,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 23:24:38,496 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 23:24:38,496 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 23:24:38,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 23:24:38,496 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 23:24:38,496 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 23:24:38,497 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 23:24:38,497 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 23:24:38,497 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 23:24:38,497 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 23:24:38,497 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 23:24:38,497 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 23:24:38,498 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 23:24:38,498 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 23:24:38,498 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 23:24:38,498 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 23:24:38,498 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 23:24:38,498 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 23:24:38,498 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 23:24:38,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:24:38,499 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 23:24:38,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:24:38,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 23:24:38,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:24:39,582 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:24:39,582 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 23:24:39,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:24:39 BoogieIcfgContainer [2020-08-18 23:24:39,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:24:39,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:24:39,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:24:39,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:24:39,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:24:37" (1/3) ... [2020-08-18 23:24:39,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf2815b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:24:39, skipping insertion in model container [2020-08-18 23:24:39,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:24:38" (2/3) ... [2020-08-18 23:24:39,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf2815b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:24:39, skipping insertion in model container [2020-08-18 23:24:39,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:24:39" (3/3) ... [2020-08-18 23:24:39,596 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product56.cil.c [2020-08-18 23:24:39,607 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:24:39,616 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:24:39,631 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:24:39,658 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:24:39,659 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:24:39,659 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:24:39,659 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:24:39,659 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:24:39,660 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:24:39,660 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:24:39,660 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:24:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-08-18 23:24:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 23:24:39,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:24:39,696 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 23:24:39,697 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:24:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:24:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash -559348317, now seen corresponding path program 1 times [2020-08-18 23:24:39,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:24:39,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189848446] [2020-08-18 23:24:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:24:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:40,359 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:24:40,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:24:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:40,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:24:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:40,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:24:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:40,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:24:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:40,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:24:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:40,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 23:24:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:40,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 23:24:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:40,453 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 23:24:40,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189848446] [2020-08-18 23:24:40,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:24:40,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:24:40,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507222211] [2020-08-18 23:24:40,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:24:40,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:24:40,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:24:40,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:24:40,480 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 3 states. [2020-08-18 23:24:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:24:41,863 INFO L93 Difference]: Finished difference Result 358 states and 464 transitions. [2020-08-18 23:24:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:24:41,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 23:24:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:24:41,885 INFO L225 Difference]: With dead ends: 358 [2020-08-18 23:24:41,885 INFO L226 Difference]: Without dead ends: 193 [2020-08-18 23:24:41,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:24:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-18 23:24:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2020-08-18 23:24:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-18 23:24:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2020-08-18 23:24:42,013 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 46 [2020-08-18 23:24:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:24:42,013 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2020-08-18 23:24:42,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:24:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2020-08-18 23:24:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 23:24:42,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:24:42,018 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 23:24:42,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:24:42,018 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:24:42,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:24:42,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1620740414, now seen corresponding path program 1 times [2020-08-18 23:24:42,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:24:42,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404307398] [2020-08-18 23:24:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:24:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:42,330 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:24:42,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:24:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:42,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:24:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:42,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:24:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:42,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:24:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:42,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:24:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:42,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 23:24:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:42,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 23:24:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:42,378 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 23:24:42,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404307398] [2020-08-18 23:24:42,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:24:42,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:24:42,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913944583] [2020-08-18 23:24:42,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:24:42,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:24:42,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:24:42,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:24:42,383 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand 4 states. [2020-08-18 23:24:42,847 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:24:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:24:43,856 INFO L93 Difference]: Finished difference Result 281 states and 343 transitions. [2020-08-18 23:24:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:24:43,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 23:24:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:24:43,861 INFO L225 Difference]: With dead ends: 281 [2020-08-18 23:24:43,861 INFO L226 Difference]: Without dead ends: 177 [2020-08-18 23:24:43,863 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 23:24:43,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-08-18 23:24:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2020-08-18 23:24:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-18 23:24:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2020-08-18 23:24:43,908 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 47 [2020-08-18 23:24:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:24:43,908 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2020-08-18 23:24:43,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:24:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2020-08-18 23:24:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 23:24:43,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:24:43,911 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] [2020-08-18 23:24:43,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:24:43,912 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:24:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:24:43,912 INFO L82 PathProgramCache]: Analyzing trace with hash -396868600, now seen corresponding path program 1 times [2020-08-18 23:24:43,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:24:43,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106397846] [2020-08-18 23:24:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:24:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:44,256 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:24:44,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:24:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:44,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:24:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:44,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:24:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:44,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:24:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:44,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:24:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:44,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 23:24:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:44,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 23:24:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:44,368 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 23:24:44,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106397846] [2020-08-18 23:24:44,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:24:44,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 23:24:44,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50360389] [2020-08-18 23:24:44,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 23:24:44,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:24:44,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 23:24:44,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:24:44,376 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 8 states. [2020-08-18 23:24:44,787 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:24:45,089 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:24:45,321 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:24:45,546 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:24:46,287 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:24:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:24:48,475 INFO L93 Difference]: Finished difference Result 500 states and 619 transitions. [2020-08-18 23:24:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:24:48,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 23:24:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:24:48,483 INFO L225 Difference]: With dead ends: 500 [2020-08-18 23:24:48,484 INFO L226 Difference]: Without dead ends: 377 [2020-08-18 23:24:48,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:24:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-18 23:24:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 308. [2020-08-18 23:24:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-08-18 23:24:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 372 transitions. [2020-08-18 23:24:48,567 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 372 transitions. Word has length 52 [2020-08-18 23:24:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:24:48,568 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 372 transitions. [2020-08-18 23:24:48,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 23:24:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 372 transitions. [2020-08-18 23:24:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 23:24:48,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:24:48,571 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] [2020-08-18 23:24:48,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:24:48,572 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:24:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:24:48,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1317156286, now seen corresponding path program 1 times [2020-08-18 23:24:48,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:24:48,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410718242] [2020-08-18 23:24:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:24:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:48,901 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:24:48,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:24:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:48,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:24:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:48,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:24:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:48,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:24:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:48,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:24:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:48,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 23:24:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:48,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 23:24:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:49,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 23:24:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:49,023 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 23:24:49,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410718242] [2020-08-18 23:24:49,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:24:49,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 23:24:49,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325087615] [2020-08-18 23:24:49,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 23:24:49,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:24:49,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 23:24:49,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:24:49,026 INFO L87 Difference]: Start difference. First operand 308 states and 372 transitions. Second operand 12 states. [2020-08-18 23:24:49,520 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:24:49,857 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:24:50,107 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:24:50,346 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:24:50,894 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:24:51,743 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:24:52,101 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 23:24:52,456 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 23:24:52,709 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 23:24:52,980 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:24:53,339 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 23:24:53,702 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 23:24:54,107 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:24:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:24:56,392 INFO L93 Difference]: Finished difference Result 1257 states and 1722 transitions. [2020-08-18 23:24:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 23:24:56,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-18 23:24:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:24:56,403 INFO L225 Difference]: With dead ends: 1257 [2020-08-18 23:24:56,403 INFO L226 Difference]: Without dead ends: 973 [2020-08-18 23:24:56,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 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 23:24:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-08-18 23:24:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 872. [2020-08-18 23:24:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-18 23:24:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1114 transitions. [2020-08-18 23:24:56,622 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1114 transitions. Word has length 57 [2020-08-18 23:24:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:24:56,623 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1114 transitions. [2020-08-18 23:24:56,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 23:24:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1114 transitions. [2020-08-18 23:24:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 23:24:56,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:24:56,628 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] [2020-08-18 23:24:56,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:24:56,629 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:24:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:24:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1811637144, now seen corresponding path program 1 times [2020-08-18 23:24:56,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:24:56,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401018375] [2020-08-18 23:24:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:24:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:56,958 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:24:56,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:24:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:56,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:24:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:56,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:24:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:56,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:24:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:56,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:24:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:57,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 23:24:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:57,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 23:24:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:57,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 23:24:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:57,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 23:24:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:24:57,030 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 23:24:57,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401018375] [2020-08-18 23:24:57,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:24:57,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 23:24:57,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179551425] [2020-08-18 23:24:57,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:24:57,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:24:57,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:24:57,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:24:57,033 INFO L87 Difference]: Start difference. First operand 872 states and 1114 transitions. Second operand 6 states. [2020-08-18 23:24:57,562 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:24:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:24:59,637 INFO L93 Difference]: Finished difference Result 2053 states and 2819 transitions. [2020-08-18 23:24:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 23:24:59,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 23:24:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:24:59,652 INFO L225 Difference]: With dead ends: 2053 [2020-08-18 23:24:59,652 INFO L226 Difference]: Without dead ends: 1205 [2020-08-18 23:24:59,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:24:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-08-18 23:24:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1114. [2020-08-18 23:24:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2020-08-18 23:24:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1402 transitions. [2020-08-18 23:24:59,884 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1402 transitions. Word has length 61 [2020-08-18 23:24:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:24:59,885 INFO L479 AbstractCegarLoop]: Abstraction has 1114 states and 1402 transitions. [2020-08-18 23:24:59,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:24:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1402 transitions. [2020-08-18 23:24:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 23:24:59,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:24:59,889 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] [2020-08-18 23:24:59,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:24:59,889 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:24:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:24:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1078445760, now seen corresponding path program 1 times [2020-08-18 23:24:59,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:24:59,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329939125] [2020-08-18 23:24:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:24:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,169 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:25:00,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:25:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:25:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:25:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:25:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:25:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 23:25:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 23:25:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 23:25:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 23:25:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 23:25:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 23:25:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 23:25:00,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329939125] [2020-08-18 23:25:00,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:25:00,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:25:00,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379866244] [2020-08-18 23:25:00,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:25:00,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:25:00,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:25:00,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:25:00,355 INFO L87 Difference]: Start difference. First operand 1114 states and 1402 transitions. Second operand 10 states. [2020-08-18 23:25:01,090 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-18 23:25:01,746 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:25:03,857 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:25:06,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:25:06,204 INFO L93 Difference]: Finished difference Result 2165 states and 2849 transitions. [2020-08-18 23:25:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 23:25:06,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-18 23:25:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:25:06,219 INFO L225 Difference]: With dead ends: 2165 [2020-08-18 23:25:06,219 INFO L226 Difference]: Without dead ends: 1340 [2020-08-18 23:25:06,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-18 23:25:06,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2020-08-18 23:25:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1227. [2020-08-18 23:25:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-18 23:25:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1523 transitions. [2020-08-18 23:25:06,433 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1523 transitions. Word has length 89 [2020-08-18 23:25:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:25:06,434 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1523 transitions. [2020-08-18 23:25:06,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:25:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1523 transitions. [2020-08-18 23:25:06,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 23:25:06,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:25:06,439 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] [2020-08-18 23:25:06,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:25:06,440 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:25:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:25:06,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1688312402, now seen corresponding path program 1 times [2020-08-18 23:25:06,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:25:06,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388047785] [2020-08-18 23:25:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:25:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,722 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:25:06,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:25:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:25:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:25:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:25:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:25:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 23:25:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 23:25:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 23:25:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 23:25:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:25:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:25:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-18 23:25:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 23:25:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 23:25:06,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388047785] [2020-08-18 23:25:06,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:25:06,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:25:06,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582091299] [2020-08-18 23:25:06,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:25:06,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:25:06,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:25:06,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:25:06,952 INFO L87 Difference]: Start difference. First operand 1227 states and 1523 transitions. Second operand 10 states. [2020-08-18 23:25:08,354 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:08,584 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 23:25:08,821 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:09,058 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:10,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:25:10,110 INFO L93 Difference]: Finished difference Result 2574 states and 3341 transitions. [2020-08-18 23:25:10,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:25:10,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-18 23:25:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:25:10,119 INFO L225 Difference]: With dead ends: 2574 [2020-08-18 23:25:10,119 INFO L226 Difference]: Without dead ends: 1371 [2020-08-18 23:25:10,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:25:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2020-08-18 23:25:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1257. [2020-08-18 23:25:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1257 states. [2020-08-18 23:25:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1557 transitions. [2020-08-18 23:25:10,376 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1557 transitions. Word has length 133 [2020-08-18 23:25:10,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:25:10,376 INFO L479 AbstractCegarLoop]: Abstraction has 1257 states and 1557 transitions. [2020-08-18 23:25:10,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:25:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1557 transitions. [2020-08-18 23:25:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-18 23:25:10,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:25:10,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:25:10,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:25:10,382 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:25:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:25:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1621468459, now seen corresponding path program 1 times [2020-08-18 23:25:10,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:25:10,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819167089] [2020-08-18 23:25:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:25:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,647 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:25:10,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:25:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:25:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:25:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:25:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:25:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 23:25:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 23:25:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 23:25:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 23:25:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 23:25:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 23:25:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:25:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 23:25:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 23:25:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 23:25:10,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819167089] [2020-08-18 23:25:10,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:25:10,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 23:25:10,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723426046] [2020-08-18 23:25:10,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 23:25:10,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:25:10,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 23:25:10,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:25:10,875 INFO L87 Difference]: Start difference. First operand 1257 states and 1557 transitions. Second operand 13 states. [2020-08-18 23:25:11,695 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:25:12,601 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:14,911 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:15,181 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:15,425 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:15,653 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 23:25:15,896 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:16,131 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 23:25:16,355 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:16,615 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 23:25:16,871 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 23:25:17,096 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 23:25:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:25:18,053 INFO L93 Difference]: Finished difference Result 3807 states and 4924 transitions. [2020-08-18 23:25:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 23:25:18,053 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-08-18 23:25:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:25:18,068 INFO L225 Difference]: With dead ends: 3807 [2020-08-18 23:25:18,068 INFO L226 Difference]: Without dead ends: 2574 [2020-08-18 23:25:18,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 23:25:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2020-08-18 23:25:18,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2369. [2020-08-18 23:25:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2369 states. [2020-08-18 23:25:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 2892 transitions. [2020-08-18 23:25:18,533 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 2892 transitions. Word has length 137 [2020-08-18 23:25:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:25:18,534 INFO L479 AbstractCegarLoop]: Abstraction has 2369 states and 2892 transitions. [2020-08-18 23:25:18,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 23:25:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 2892 transitions. [2020-08-18 23:25:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-18 23:25:18,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:25:18,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:25:18,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:25:18,544 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:25:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:25:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash -892794252, now seen corresponding path program 1 times [2020-08-18 23:25:18,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:25:18,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311183894] [2020-08-18 23:25:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:25:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,819 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:25:18,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:25:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:25:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:25:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:25:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:25:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 23:25:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 23:25:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 23:25:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 23:25:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 23:25:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:18,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 23:25:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:19,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:19,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:19,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:25:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:19,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 23:25:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:19,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 23:25:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 23:25:19,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311183894] [2020-08-18 23:25:19,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:25:19,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 23:25:19,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111967056] [2020-08-18 23:25:19,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 23:25:19,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:25:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 23:25:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:25:19,043 INFO L87 Difference]: Start difference. First operand 2369 states and 2892 transitions. Second operand 13 states. [2020-08-18 23:25:19,791 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:20,116 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:20,382 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:21,290 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:21,560 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:21,787 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:25:23,438 INFO L93 Difference]: Finished difference Result 4569 states and 5911 transitions. [2020-08-18 23:25:23,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 23:25:23,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-08-18 23:25:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:25:23,452 INFO L225 Difference]: With dead ends: 4569 [2020-08-18 23:25:23,453 INFO L226 Difference]: Without dead ends: 2224 [2020-08-18 23:25:23,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-08-18 23:25:23,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2020-08-18 23:25:23,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1917. [2020-08-18 23:25:23,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-08-18 23:25:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2288 transitions. [2020-08-18 23:25:23,752 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2288 transitions. Word has length 137 [2020-08-18 23:25:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:25:23,752 INFO L479 AbstractCegarLoop]: Abstraction has 1917 states and 2288 transitions. [2020-08-18 23:25:23,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 23:25:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2288 transitions. [2020-08-18 23:25:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-18 23:25:23,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:25:23,758 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:25:23,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:25:23,759 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:25:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:25:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash -671261639, now seen corresponding path program 1 times [2020-08-18 23:25:23,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:25:23,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114736706] [2020-08-18 23:25:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:25:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,033 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:25:24,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:25:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:25:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:25:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:25:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:25:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 23:25:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:25:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:25:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 23:25:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 23:25:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 23:25:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 23:25:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:25:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-18 23:25:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 23:25:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 23:25:24,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114736706] [2020-08-18 23:25:24,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:25:24,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 23:25:24,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676457155] [2020-08-18 23:25:24,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 23:25:24,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:25:24,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 23:25:24,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:25:24,211 INFO L87 Difference]: Start difference. First operand 1917 states and 2288 transitions. Second operand 11 states. [2020-08-18 23:25:24,680 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:25:26,823 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:27,084 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:27,330 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:27,701 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:25:27,964 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:25:28,423 INFO L93 Difference]: Finished difference Result 2255 states and 2883 transitions. [2020-08-18 23:25:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 23:25:28,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2020-08-18 23:25:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:25:28,436 INFO L225 Difference]: With dead ends: 2255 [2020-08-18 23:25:28,436 INFO L226 Difference]: Without dead ends: 2252 [2020-08-18 23:25:28,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-18 23:25:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2020-08-18 23:25:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1917. [2020-08-18 23:25:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-08-18 23:25:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2278 transitions. [2020-08-18 23:25:28,706 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2278 transitions. Word has length 141 [2020-08-18 23:25:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:25:28,707 INFO L479 AbstractCegarLoop]: Abstraction has 1917 states and 2278 transitions. [2020-08-18 23:25:28,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 23:25:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2278 transitions. [2020-08-18 23:25:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 23:25:28,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:25:28,713 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, 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 23:25:28,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:25:28,714 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:25:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:25:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1745517035, now seen corresponding path program 1 times [2020-08-18 23:25:28,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:25:28,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216403944] [2020-08-18 23:25:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:25:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,015 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 23:25:29,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:25:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:25:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 23:25:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:25:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 23:25:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 23:25:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 23:25:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 23:25:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 23:25:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 23:25:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 23:25:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 23:25:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 23:25:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 23:25:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:25:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 23:25:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-18 23:25:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:25:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 23:25:29,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216403944] [2020-08-18 23:25:29,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:25:29,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 23:25:29,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581564454] [2020-08-18 23:25:29,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 23:25:29,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:25:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 23:25:29,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:25:29,199 INFO L87 Difference]: Start difference. First operand 1917 states and 2278 transitions. Second operand 12 states. [2020-08-18 23:25:29,710 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 23:25:30,739 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 23:25:31,029 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 23:25:31,286 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 23:25:31,522 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:25:31,865 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:32,120 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 23:25:33,086 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 23:25:33,356 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 23:25:33,660 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 190