/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 19:38:14,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:38:14,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:38:14,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:38:14,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:38:14,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:38:14,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:38:14,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:38:14,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:38:14,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:38:14,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:38:14,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:38:14,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:38:14,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:38:14,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:38:14,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:38:14,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:38:14,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:38:14,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:38:14,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:38:14,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:38:14,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:38:14,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:38:14,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:38:14,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:38:14,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:38:14,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:38:14,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:38:14,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:38:14,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:38:14,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:38:14,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:38:14,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:38:14,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:38:14,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:38:14,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:38:14,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:38:14,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:38:14,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:38:14,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:38:14,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:38:14,316 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 [2020-08-21 19:38:14,353 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:38:14,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:38:14,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:38:14,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:38:14,355 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:38:14,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:38:14,356 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:38:14,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:38:14,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:38:14,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:38:14,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:38:14,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:38:14,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:38:14,359 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:38:14,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:38:14,359 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:38:14,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:38:14,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:38:14,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:38:14,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:38:14,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:38:14,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:38:14,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:38:14,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:38:14,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:38:14,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:38:14,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:38:14,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:38:14,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:38:14,362 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=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:38:14,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:38:14,663 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:38:14,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:38:14,667 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:38:14,668 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:38:14,668 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-21 19:38:14,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0534d0b65/651e5ab5ffcc4bd4b8cc2b1a01470460/FLAGa6c37cefc [2020-08-21 19:38:15,320 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:38:15,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-21 19:38:15,341 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0534d0b65/651e5ab5ffcc4bd4b8cc2b1a01470460/FLAGa6c37cefc [2020-08-21 19:38:15,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0534d0b65/651e5ab5ffcc4bd4b8cc2b1a01470460 [2020-08-21 19:38:15,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:38:15,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:38:15,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:38:15,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:38:15,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:38:15,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:38:15" (1/1) ... [2020-08-21 19:38:15,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b44b751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:15, skipping insertion in model container [2020-08-21 19:38:15,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:38:15" (1/1) ... [2020-08-21 19:38:15,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:38:15,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:38:16,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:38:16,186 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:38:16,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:38:16,303 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:38:16,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:16 WrapperNode [2020-08-21 19:38:16,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:38:16,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:38:16,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:38:16,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:38:16,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:16" (1/1) ... [2020-08-21 19:38:16,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:16" (1/1) ... [2020-08-21 19:38:16,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:16" (1/1) ... [2020-08-21 19:38:16,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:16" (1/1) ... [2020-08-21 19:38:16,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:16" (1/1) ... [2020-08-21 19:38:16,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:16" (1/1) ... [2020-08-21 19:38:16,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:16" (1/1) ... [2020-08-21 19:38:16,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:38:16,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:38:16,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:38:16,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:38:16,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:38:16,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:38:16,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:38:16,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 19:38:16,481 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 19:38:16,482 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 19:38:16,482 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 19:38:16,482 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 19:38:16,482 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 19:38:16,482 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 19:38:16,483 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 19:38:16,483 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 19:38:16,483 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 19:38:16,483 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 19:38:16,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 19:38:16,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 19:38:16,485 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 19:38:16,485 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 19:38:16,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 19:38:16,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 19:38:16,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 19:38:16,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 19:38:16,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 19:38:16,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 19:38:16,486 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 19:38:16,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 19:38:16,487 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 19:38:16,487 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 19:38:16,487 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 19:38:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 19:38:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:38:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 19:38:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 19:38:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 19:38:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 19:38:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 19:38:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 19:38:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 19:38:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 19:38:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 19:38:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 19:38:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 19:38:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 19:38:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 19:38:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:38:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:38:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 19:38:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 19:38:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 19:38:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 19:38:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 19:38:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 19:38:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 19:38:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 19:38:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 19:38:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 19:38:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 19:38:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 19:38:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 19:38:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 19:38:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 19:38:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 19:38:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 19:38:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 19:38:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 19:38:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 19:38:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 19:38:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 19:38:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 19:38:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 19:38:16,495 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 19:38:16,495 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 19:38:16,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 19:38:16,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 19:38:16,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 19:38:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 19:38:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 19:38:16,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 19:38:16,498 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 19:38:16,498 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 19:38:16,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 19:38:16,498 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 19:38:16,499 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 19:38:16,500 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 19:38:16,500 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 19:38:16,500 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 19:38:16,500 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 19:38:16,500 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 19:38:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 19:38:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 19:38:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 19:38:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 19:38:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 19:38:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 19:38:16,502 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 19:38:16,502 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 19:38:16,502 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:38:16,502 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 19:38:16,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:38:16,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 19:38:16,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:38:17,579 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:38:17,580 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 19:38:17,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:38:17 BoogieIcfgContainer [2020-08-21 19:38:17,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:38:17,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:38:17,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:38:17,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:38:17,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:38:15" (1/3) ... [2020-08-21 19:38:17,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3d9517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:38:17, skipping insertion in model container [2020-08-21 19:38:17,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:38:16" (2/3) ... [2020-08-21 19:38:17,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3d9517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:38:17, skipping insertion in model container [2020-08-21 19:38:17,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:38:17" (3/3) ... [2020-08-21 19:38:17,593 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product56.cil.c [2020-08-21 19:38:17,603 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:38:17,611 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:38:17,625 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:38:17,647 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:38:17,647 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:38:17,647 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:38:17,648 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:38:17,648 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:38:17,648 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:38:17,648 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:38:17,649 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:38:17,672 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-08-21 19:38:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 19:38:17,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:38:17,683 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] [2020-08-21 19:38:17,683 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:38:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:38:17,688 INFO L82 PathProgramCache]: Analyzing trace with hash -559348317, now seen corresponding path program 1 times [2020-08-21 19:38:17,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:38:17,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627575404] [2020-08-21 19:38:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:38:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:18,356 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:38:18,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:38:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:18,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:38:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:18,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:38:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:18,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:38:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:18,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:38:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:18,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 19:38:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:18,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 19:38:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:38:18,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627575404] [2020-08-21 19:38:18,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:38:18,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:38:18,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703163066] [2020-08-21 19:38:18,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:38:18,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:38:18,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:38:18,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:38:18,501 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 3 states. [2020-08-21 19:38:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:38:19,843 INFO L93 Difference]: Finished difference Result 358 states and 464 transitions. [2020-08-21 19:38:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:38:19,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 19:38:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:38:19,859 INFO L225 Difference]: With dead ends: 358 [2020-08-21 19:38:19,859 INFO L226 Difference]: Without dead ends: 193 [2020-08-21 19:38:19,863 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 [2020-08-21 19:38:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-21 19:38:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2020-08-21 19:38:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-21 19:38:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2020-08-21 19:38:19,956 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 46 [2020-08-21 19:38:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:38:19,957 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2020-08-21 19:38:19,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:38:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2020-08-21 19:38:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 19:38:19,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:38:19,961 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] [2020-08-21 19:38:19,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:38:19,962 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:38:19,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:38:19,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1620740414, now seen corresponding path program 1 times [2020-08-21 19:38:19,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:38:19,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136644973] [2020-08-21 19:38:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:38:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:20,366 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:38:20,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:38:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:20,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:38:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:20,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:38:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:20,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:38:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:20,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:38:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:20,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 19:38:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:20,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 19:38:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:38:20,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136644973] [2020-08-21 19:38:20,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:38:20,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 19:38:20,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489788874] [2020-08-21 19:38:20,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 19:38:20,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:38:20,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 19:38:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 19:38:20,412 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand 4 states. [2020-08-21 19:38:20,838 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:38:21,877 INFO L93 Difference]: Finished difference Result 281 states and 343 transitions. [2020-08-21 19:38:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:38:21,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 19:38:21,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:38:21,882 INFO L225 Difference]: With dead ends: 281 [2020-08-21 19:38:21,882 INFO L226 Difference]: Without dead ends: 177 [2020-08-21 19:38:21,884 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 [2020-08-21 19:38:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-08-21 19:38:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2020-08-21 19:38:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-21 19:38:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2020-08-21 19:38:21,926 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 47 [2020-08-21 19:38:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:38:21,926 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2020-08-21 19:38:21,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 19:38:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2020-08-21 19:38:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 19:38:21,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:38:21,929 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] [2020-08-21 19:38:21,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:38:21,929 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:38:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:38:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash -396868600, now seen corresponding path program 1 times [2020-08-21 19:38:21,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:38:21,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413528445] [2020-08-21 19:38:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:38:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:22,286 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:38:22,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:38:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:22,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:38:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:22,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:38:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:22,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:38:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:22,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:38:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:22,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 19:38:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:22,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 19:38:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:38:22,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413528445] [2020-08-21 19:38:22,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:38:22,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 19:38:22,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272125851] [2020-08-21 19:38:22,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:38:22,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:38:22,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:38:22,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:38:22,385 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 8 states. [2020-08-21 19:38:22,748 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:38:23,042 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:38:23,315 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:38:23,556 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:38:24,327 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:38:26,492 INFO L93 Difference]: Finished difference Result 500 states and 619 transitions. [2020-08-21 19:38:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:38:26,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 19:38:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:38:26,498 INFO L225 Difference]: With dead ends: 500 [2020-08-21 19:38:26,498 INFO L226 Difference]: Without dead ends: 377 [2020-08-21 19:38:26,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:38:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-21 19:38:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 308. [2020-08-21 19:38:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-08-21 19:38:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 372 transitions. [2020-08-21 19:38:26,588 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 372 transitions. Word has length 52 [2020-08-21 19:38:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:38:26,588 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 372 transitions. [2020-08-21 19:38:26,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:38:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 372 transitions. [2020-08-21 19:38:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 19:38:26,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:38:26,591 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] [2020-08-21 19:38:26,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:38:26,592 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:38:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:38:26,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1317156286, now seen corresponding path program 1 times [2020-08-21 19:38:26,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:38:26,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800618822] [2020-08-21 19:38:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:38:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:26,937 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:38:26,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:38:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:26,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:38:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:26,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:38:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:26,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:38:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:27,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:38:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:27,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 19:38:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:27,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 19:38:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:27,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 19:38:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:38:27,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800618822] [2020-08-21 19:38:27,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:38:27,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 19:38:27,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308167206] [2020-08-21 19:38:27,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 19:38:27,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:38:27,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 19:38:27,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:38:27,047 INFO L87 Difference]: Start difference. First operand 308 states and 372 transitions. Second operand 12 states. [2020-08-21 19:38:27,507 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:38:27,806 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:38:28,051 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:38:28,317 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:38:28,838 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:29,666 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:38:30,092 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 19:38:30,418 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 19:38:30,691 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 19:38:30,957 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:38:31,340 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 19:38:31,698 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 19:38:32,081 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:38:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:38:34,421 INFO L93 Difference]: Finished difference Result 1257 states and 1722 transitions. [2020-08-21 19:38:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 19:38:34,422 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-21 19:38:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:38:34,429 INFO L225 Difference]: With dead ends: 1257 [2020-08-21 19:38:34,429 INFO L226 Difference]: Without dead ends: 973 [2020-08-21 19:38:34,432 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 [2020-08-21 19:38:34,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-08-21 19:38:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 872. [2020-08-21 19:38:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 19:38:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1114 transitions. [2020-08-21 19:38:34,631 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1114 transitions. Word has length 57 [2020-08-21 19:38:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:38:34,632 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1114 transitions. [2020-08-21 19:38:34,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 19:38:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1114 transitions. [2020-08-21 19:38:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 19:38:34,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:38:34,637 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] [2020-08-21 19:38:34,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:38:34,638 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:38:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:38:34,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1811637144, now seen corresponding path program 1 times [2020-08-21 19:38:34,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:38:34,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564100795] [2020-08-21 19:38:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:38:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:34,928 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:38:34,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:38:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:34,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:38:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:34,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:38:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:34,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:38:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:34,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:38:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:35,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 19:38:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:35,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:38:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:35,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 19:38:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:35,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 19:38:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:38:35,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564100795] [2020-08-21 19:38:35,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:38:35,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 19:38:35,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587867729] [2020-08-21 19:38:35,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:38:35,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:38:35,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:38:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:38:35,057 INFO L87 Difference]: Start difference. First operand 872 states and 1114 transitions. Second operand 6 states. [2020-08-21 19:38:35,416 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:38:37,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:38:37,514 INFO L93 Difference]: Finished difference Result 2053 states and 2819 transitions. [2020-08-21 19:38:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 19:38:37,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 19:38:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:38:37,525 INFO L225 Difference]: With dead ends: 2053 [2020-08-21 19:38:37,525 INFO L226 Difference]: Without dead ends: 1205 [2020-08-21 19:38:37,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:38:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-08-21 19:38:37,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1114. [2020-08-21 19:38:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2020-08-21 19:38:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1402 transitions. [2020-08-21 19:38:37,779 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1402 transitions. Word has length 61 [2020-08-21 19:38:37,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:38:37,780 INFO L479 AbstractCegarLoop]: Abstraction has 1114 states and 1402 transitions. [2020-08-21 19:38:37,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:38:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1402 transitions. [2020-08-21 19:38:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 19:38:37,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:38:37,785 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] [2020-08-21 19:38:37,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:38:37,786 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:38:37,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:38:37,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1078445760, now seen corresponding path program 1 times [2020-08-21 19:38:37,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:38:37,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589998999] [2020-08-21 19:38:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:38:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,097 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:38:38,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:38:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:38:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:38:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:38:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:38:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 19:38:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:38:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 19:38:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 19:38:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 19:38:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 19:38:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 19:38:38,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589998999] [2020-08-21 19:38:38,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:38:38,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 19:38:38,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257578492] [2020-08-21 19:38:38,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 19:38:38,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:38:38,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 19:38:38,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:38:38,253 INFO L87 Difference]: Start difference. First operand 1114 states and 1402 transitions. Second operand 10 states. [2020-08-21 19:38:38,928 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-21 19:38:39,537 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:38:41,573 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:38:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:38:43,776 INFO L93 Difference]: Finished difference Result 2165 states and 2849 transitions. [2020-08-21 19:38:43,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 19:38:43,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-21 19:38:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:38:43,785 INFO L225 Difference]: With dead ends: 2165 [2020-08-21 19:38:43,786 INFO L226 Difference]: Without dead ends: 1340 [2020-08-21 19:38:43,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-21 19:38:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2020-08-21 19:38:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1227. [2020-08-21 19:38:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-21 19:38:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1523 transitions. [2020-08-21 19:38:43,989 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1523 transitions. Word has length 89 [2020-08-21 19:38:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:38:43,989 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1523 transitions. [2020-08-21 19:38:43,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 19:38:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1523 transitions. [2020-08-21 19:38:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-21 19:38:43,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:38:43,994 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] [2020-08-21 19:38:43,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:38:43,994 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:38:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:38:43,995 INFO L82 PathProgramCache]: Analyzing trace with hash -478965993, now seen corresponding path program 1 times [2020-08-21 19:38:43,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:38:43,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492267648] [2020-08-21 19:38:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:38:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,257 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:38:44,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:38:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:38:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:38:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:38:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:38:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 19:38:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:38:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 19:38:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 19:38:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 19:38:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 19:38:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 19:38:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-21 19:38:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 19:38:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 19:38:44,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492267648] [2020-08-21 19:38:44,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:38:44,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 19:38:44,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317610682] [2020-08-21 19:38:44,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:38:44,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:38:44,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:38:44,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:38:44,423 INFO L87 Difference]: Start difference. First operand 1227 states and 1523 transitions. Second operand 9 states. [2020-08-21 19:38:45,463 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:45,692 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:45,925 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:38:46,968 INFO L93 Difference]: Finished difference Result 2268 states and 2960 transitions. [2020-08-21 19:38:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:38:46,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2020-08-21 19:38:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:38:46,978 INFO L225 Difference]: With dead ends: 2268 [2020-08-21 19:38:46,978 INFO L226 Difference]: Without dead ends: 1353 [2020-08-21 19:38:46,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:38:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2020-08-21 19:38:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1227. [2020-08-21 19:38:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-21 19:38:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1521 transitions. [2020-08-21 19:38:47,291 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1521 transitions. Word has length 137 [2020-08-21 19:38:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:38:47,292 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1521 transitions. [2020-08-21 19:38:47,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:38:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1521 transitions. [2020-08-21 19:38:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 19:38:47,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:38:47,298 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] [2020-08-21 19:38:47,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:38:47,298 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:38:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:38:47,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1688312402, now seen corresponding path program 1 times [2020-08-21 19:38:47,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:38:47,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392577770] [2020-08-21 19:38:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:38:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,579 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:38:47,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:38:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:38:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:38:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:38:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:38:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 19:38:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 19:38:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 19:38:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 19:38:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 19:38:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 19:38:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-21 19:38:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-21 19:38:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 19:38:47,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392577770] [2020-08-21 19:38:47,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:38:47,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 19:38:47,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804516181] [2020-08-21 19:38:47,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 19:38:47,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:38:47,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 19:38:47,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:38:47,804 INFO L87 Difference]: Start difference. First operand 1227 states and 1521 transitions. Second operand 10 states. [2020-08-21 19:38:48,838 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:38:49,075 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 19:38:49,326 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:49,617 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:50,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:38:50,639 INFO L93 Difference]: Finished difference Result 2564 states and 3284 transitions. [2020-08-21 19:38:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:38:50,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-21 19:38:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:38:50,647 INFO L225 Difference]: With dead ends: 2564 [2020-08-21 19:38:50,647 INFO L226 Difference]: Without dead ends: 1361 [2020-08-21 19:38:50,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 19:38:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2020-08-21 19:38:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1247. [2020-08-21 19:38:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2020-08-21 19:38:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1543 transitions. [2020-08-21 19:38:50,879 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1543 transitions. Word has length 133 [2020-08-21 19:38:50,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:38:50,879 INFO L479 AbstractCegarLoop]: Abstraction has 1247 states and 1543 transitions. [2020-08-21 19:38:50,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 19:38:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1543 transitions. [2020-08-21 19:38:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 19:38:50,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:38:50,885 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] [2020-08-21 19:38:50,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:38:50,886 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:38:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:38:50,886 INFO L82 PathProgramCache]: Analyzing trace with hash 545809936, now seen corresponding path program 1 times [2020-08-21 19:38:50,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:38:50,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995709366] [2020-08-21 19:38:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:38:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,184 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:38:51,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:38:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:38:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:38:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:38:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:38:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 19:38:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 19:38:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 19:38:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 19:38:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 19:38:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 19:38:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-21 19:38:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-21 19:38:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 19:38:51,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995709366] [2020-08-21 19:38:51,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:38:51,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 19:38:51,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535181054] [2020-08-21 19:38:51,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 19:38:51,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:38:51,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 19:38:51,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:38:51,417 INFO L87 Difference]: Start difference. First operand 1247 states and 1543 transitions. Second operand 12 states. [2020-08-21 19:38:52,448 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:52,788 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:53,001 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:53,741 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:53,997 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:54,250 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:38:55,452 INFO L93 Difference]: Finished difference Result 2351 states and 3005 transitions. [2020-08-21 19:38:55,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:38:55,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 133 [2020-08-21 19:38:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:38:55,459 INFO L225 Difference]: With dead ends: 2351 [2020-08-21 19:38:55,459 INFO L226 Difference]: Without dead ends: 1128 [2020-08-21 19:38:55,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 19:38:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-08-21 19:38:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1070. [2020-08-21 19:38:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-08-21 19:38:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1296 transitions. [2020-08-21 19:38:55,679 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1296 transitions. Word has length 133 [2020-08-21 19:38:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:38:55,679 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1296 transitions. [2020-08-21 19:38:55,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 19:38:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1296 transitions. [2020-08-21 19:38:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-21 19:38:55,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:38:55,684 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] [2020-08-21 19:38:55,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:38:55,685 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:38:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:38:55,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1621468459, now seen corresponding path program 1 times [2020-08-21 19:38:55,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:38:55,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836871291] [2020-08-21 19:38:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:38:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:55,964 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:38:55,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:38:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:55,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:38:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:55,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:38:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:55,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:38:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:55,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:38:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 19:38:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:38:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 19:38:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 19:38:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 19:38:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 19:38:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:38:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:38:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 19:38:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-21 19:38:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 19:38:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:38:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 19:38:56,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836871291] [2020-08-21 19:38:56,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:38:56,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 19:38:56,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176121785] [2020-08-21 19:38:56,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 19:38:56,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:38:56,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 19:38:56,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:38:56,169 INFO L87 Difference]: Start difference. First operand 1070 states and 1296 transitions. Second operand 13 states. [2020-08-21 19:38:56,866 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:38:57,550 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:38:59,916 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:39:00,190 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:39:00,450 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:39:00,695 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 19:39:00,963 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:39:01,228 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 19:39:01,477 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:39:01,719 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 19:39:01,987 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 19:39:02,255 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 19:39:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:39:03,240 INFO L93 Difference]: Finished difference Result 3048 states and 3818 transitions. [2020-08-21 19:39:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 19:39:03,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-08-21 19:39:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:39:03,251 INFO L225 Difference]: With dead ends: 3048 [2020-08-21 19:39:03,251 INFO L226 Difference]: Without dead ends: 2002 [2020-08-21 19:39:03,255 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 [2020-08-21 19:39:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2020-08-21 19:39:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1897. [2020-08-21 19:39:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2020-08-21 19:39:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2260 transitions. [2020-08-21 19:39:03,615 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2260 transitions. Word has length 137 [2020-08-21 19:39:03,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:39:03,617 INFO L479 AbstractCegarLoop]: Abstraction has 1897 states and 2260 transitions. [2020-08-21 19:39:03,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 19:39:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2260 transitions. [2020-08-21 19:39:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-21 19:39:03,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:39:03,623 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] [2020-08-21 19:39:03,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:39:03,623 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:39:03,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:39:03,623 INFO L82 PathProgramCache]: Analyzing trace with hash -671261639, now seen corresponding path program 1 times [2020-08-21 19:39:03,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:39:03,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797136002] [2020-08-21 19:39:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:39:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:03,921 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:39:03,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:39:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:03,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:39:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:03,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:39:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:03,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:39:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:03,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:39:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:03,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 19:39:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:03,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 19:39:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:03,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 19:39:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:39:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 19:39:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 19:39:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:39:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 19:39:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 19:39:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:39:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 19:39:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-21 19:39:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-21 19:39:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 19:39:04,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797136002] [2020-08-21 19:39:04,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:39:04,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 19:39:04,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039529325] [2020-08-21 19:39:04,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:39:04,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:39:04,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:39:04,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:39:04,142 INFO L87 Difference]: Start difference. First operand 1897 states and 2260 transitions. Second operand 11 states. [2020-08-21 19:39:04,562 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:39:06,807 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:39:07,139 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:39:07,405 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:39:07,807 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:39:08,078 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:39:08,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:39:08,508 INFO L93 Difference]: Finished difference Result 2235 states and 2855 transitions. [2020-08-21 19:39:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 19:39:08,509 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2020-08-21 19:39:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:39:08,520 INFO L225 Difference]: With dead ends: 2235 [2020-08-21 19:39:08,520 INFO L226 Difference]: Without dead ends: 2232 [2020-08-21 19:39:08,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-21 19:39:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2020-08-21 19:39:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1897. [2020-08-21 19:39:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2020-08-21 19:39:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2250 transitions. [2020-08-21 19:39:08,830 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2250 transitions. Word has length 141 [2020-08-21 19:39:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:39:08,831 INFO L479 AbstractCegarLoop]: Abstraction has 1897 states and 2250 transitions. [2020-08-21 19:39:08,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:39:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2250 transitions. [2020-08-21 19:39:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-21 19:39:08,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:39:08,837 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] [2020-08-21 19:39:08,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:39:08,837 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:39:08,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:39:08,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1745517035, now seen corresponding path program 1 times [2020-08-21 19:39:08,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:39:08,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507168947] [2020-08-21 19:39:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:39:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,326 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 19:39:09,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:39:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:39:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 19:39:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:39:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 19:39:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 19:39:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:39:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:39:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 19:39:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 19:39:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:39:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 19:39:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 19:39:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:39:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 19:39:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:39:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 19:39:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:39:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-21 19:39:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-21 19:39:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:39:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 19:39:09,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507168947] [2020-08-21 19:39:09,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:39:09,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 19:39:09,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839564616] [2020-08-21 19:39:09,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 19:39:09,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:39:09,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 19:39:09,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:39:09,609 INFO L87 Difference]: Start difference. First operand 1897 states and 2250 transitions. Second operand 12 states. [2020-08-21 19:39:10,110 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 19:39:11,062 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 19:39:11,338 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 19:39:11,597 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 19:39:11,825 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:39:12,169 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:39:12,463 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 19:39:13,374 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 19:39:13,640 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 19:39:13,876 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 190