/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec2_product47.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:36:54,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:36:54,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:36:54,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:36:54,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:36:54,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:36:54,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:36:54,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:36:54,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:36:54,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:36:54,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:36:54,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:36:54,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:36:54,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:36:54,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:36:54,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:36:54,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:36:54,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:36:54,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:36:54,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:36:54,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:36:54,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:36:54,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:36:54,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:36:54,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:36:54,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:36:54,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:36:54,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:36:54,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:36:54,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:36:54,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:36:54,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:36:54,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:36:54,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:36:54,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:36:54,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:36:54,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:36:54,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:36:54,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:36:54,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:36:54,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:36:54,702 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 [2020-08-27 21:36:54,727 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:36:54,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:36:54,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:36:54,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:36:54,729 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:36:54,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:36:54,730 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:36:54,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:36:54,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:36:54,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:36:54,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:36:54,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:36:54,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:36:54,731 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:36:54,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:36:54,731 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:36:54,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:36:54,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:36:54,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:36:54,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:36:54,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:36:54,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:36:54,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:36:54,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:36:54,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:36:54,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:36:54,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:36:54,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:36:54,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:36:54,734 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 -> false [2020-08-27 21:36:55,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:36:55,243 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:36:55,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:36:55,250 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:36:55,250 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:36:55,252 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product47.cil.c [2020-08-27 21:36:55,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1798fed1/edb3077757ab4a00bc96a9846bf93696/FLAG45cb8baab [2020-08-27 21:36:55,960 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:36:55,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product47.cil.c [2020-08-27 21:36:55,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1798fed1/edb3077757ab4a00bc96a9846bf93696/FLAG45cb8baab [2020-08-27 21:36:56,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1798fed1/edb3077757ab4a00bc96a9846bf93696 [2020-08-27 21:36:56,208 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:36:56,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:36:56,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:36:56,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:36:56,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:36:56,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:36:56" (1/1) ... [2020-08-27 21:36:56,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b01e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:56, skipping insertion in model container [2020-08-27 21:36:56,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:36:56" (1/1) ... [2020-08-27 21:36:56,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:36:56,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:36:56,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:36:56,874 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:36:57,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:36:57,055 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:36:57,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:57 WrapperNode [2020-08-27 21:36:57,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:36:57,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:36:57,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:36:57,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:36:57,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:57" (1/1) ... [2020-08-27 21:36:57,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:57" (1/1) ... [2020-08-27 21:36:57,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:57" (1/1) ... [2020-08-27 21:36:57,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:57" (1/1) ... [2020-08-27 21:36:57,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:57" (1/1) ... [2020-08-27 21:36:57,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:57" (1/1) ... [2020-08-27 21:36:57,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:57" (1/1) ... [2020-08-27 21:36:57,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:36:57,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:36:57,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:36:57,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:36:57,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:57" (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 [2020-08-27 21:36:57,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:36:57,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:36:57,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-27 21:36:57,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-27 21:36:57,263 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-27 21:36:57,263 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-27 21:36:57,263 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-27 21:36:57,264 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-27 21:36:57,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-27 21:36:57,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-27 21:36:57,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-27 21:36:57,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-27 21:36:57,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-27 21:36:57,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-27 21:36:57,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-08-27 21:36:57,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-08-27 21:36:57,267 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-27 21:36:57,267 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-27 21:36:57,267 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-27 21:36:57,268 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-27 21:36:57,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:36:57,268 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-27 21:36:57,268 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-27 21:36:57,268 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-27 21:36:57,269 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-27 21:36:57,269 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-27 21:36:57,270 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-27 21:36:57,270 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-27 21:36:57,270 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-27 21:36:57,270 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-27 21:36:57,270 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-27 21:36:57,270 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-27 21:36:57,270 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-27 21:36:57,271 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-27 21:36:57,271 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-27 21:36:57,271 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-27 21:36:57,271 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-27 21:36:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-27 21:36:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-27 21:36:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-27 21:36:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-27 21:36:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:36:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:36:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-27 21:36:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-27 21:36:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-27 21:36:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-27 21:36:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-27 21:36:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-27 21:36:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-27 21:36:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-27 21:36:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-27 21:36:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-27 21:36:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-27 21:36:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-27 21:36:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-27 21:36:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-27 21:36:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-27 21:36:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-27 21:36:57,276 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-27 21:36:57,276 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-27 21:36:57,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-27 21:36:57,276 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-27 21:36:57,276 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-27 21:36:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-27 21:36:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-27 21:36:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-27 21:36:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-27 21:36:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-08-27 21:36:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-08-27 21:36:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-27 21:36:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-27 21:36:57,279 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-27 21:36:57,279 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-27 21:36:57,279 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-27 21:36:57,280 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-27 21:36:57,280 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-27 21:36:57,280 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-27 21:36:57,281 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-27 21:36:57,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:36:57,282 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-27 21:36:57,282 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-27 21:36:57,282 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-27 21:36:57,282 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-27 21:36:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-27 21:36:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-27 21:36:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-27 21:36:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-27 21:36:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-27 21:36:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-27 21:36:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-27 21:36:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-27 21:36:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-27 21:36:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:36:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-27 21:36:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:36:58,533 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:36:58,533 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-27 21:36:58,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:36:58 BoogieIcfgContainer [2020-08-27 21:36:58,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:36:58,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:36:58,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:36:58,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:36:58,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:36:56" (1/3) ... [2020-08-27 21:36:58,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42699a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:36:58, skipping insertion in model container [2020-08-27 21:36:58,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:36:57" (2/3) ... [2020-08-27 21:36:58,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42699a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:36:58, skipping insertion in model container [2020-08-27 21:36:58,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:36:58" (3/3) ... [2020-08-27 21:36:58,557 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product47.cil.c [2020-08-27 21:36:58,568 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:36:58,580 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:36:58,601 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:36:58,630 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:36:58,630 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:36:58,630 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:36:58,630 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:36:58,631 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:36:58,631 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:36:58,631 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:36:58,631 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:36:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states. [2020-08-27 21:36:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-27 21:36:58,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:36:58,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:36:58,672 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:36:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:36:58,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1859141612, now seen corresponding path program 1 times [2020-08-27 21:36:58,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:36:58,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455953039] [2020-08-27 21:36:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:36:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:36:59,419 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:36:59,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:36:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:36:59,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:36:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:36:59,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:36:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:36:59,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:36:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:36:59,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:36:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:36:59,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:36:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:36:59,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-27 21:36:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:36:59,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-27 21:36:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:36:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:36:59,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455953039] [2020-08-27 21:36:59,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:36:59,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:36:59,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495344448] [2020-08-27 21:36:59,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:36:59,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:36:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:36:59,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:36:59,604 INFO L87 Difference]: Start difference. First operand 184 states. Second operand 4 states. [2020-08-27 21:37:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:37:00,847 INFO L93 Difference]: Finished difference Result 317 states and 416 transitions. [2020-08-27 21:37:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:37:00,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-27 21:37:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:37:00,868 INFO L225 Difference]: With dead ends: 317 [2020-08-27 21:37:00,869 INFO L226 Difference]: Without dead ends: 177 [2020-08-27 21:37:00,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:37:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-08-27 21:37:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 141. [2020-08-27 21:37:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-27 21:37:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2020-08-27 21:37:00,983 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 51 [2020-08-27 21:37:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:37:00,983 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2020-08-27 21:37:00,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:37:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2020-08-27 21:37:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-27 21:37:00,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:37:00,988 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] [2020-08-27 21:37:00,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:37:00,989 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:37:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:37:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2121847036, now seen corresponding path program 1 times [2020-08-27 21:37:00,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:37:00,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390248481] [2020-08-27 21:37:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:37:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:01,359 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:37:01,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:37:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:01,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:37:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:01,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:37:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:01,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:01,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:37:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:01,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:37:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:01,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:37:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:01,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-27 21:37:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:37:01,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390248481] [2020-08-27 21:37:01,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:37:01,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:37:01,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706133244] [2020-08-27 21:37:01,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:37:01,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:37:01,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:37:01,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:37:01,476 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand 5 states. [2020-08-27 21:37:01,945 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:37:03,122 INFO L93 Difference]: Finished difference Result 256 states and 319 transitions. [2020-08-27 21:37:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:37:03,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-27 21:37:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:37:03,127 INFO L225 Difference]: With dead ends: 256 [2020-08-27 21:37:03,127 INFO L226 Difference]: Without dead ends: 167 [2020-08-27 21:37:03,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:37:03,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-08-27 21:37:03,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2020-08-27 21:37:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-27 21:37:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-08-27 21:37:03,173 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 52 [2020-08-27 21:37:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:37:03,174 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-08-27 21:37:03,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:37:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-08-27 21:37:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-27 21:37:03,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:37:03,177 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] [2020-08-27 21:37:03,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:37:03,177 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:37:03,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:37:03,178 INFO L82 PathProgramCache]: Analyzing trace with hash 51071948, now seen corresponding path program 1 times [2020-08-27 21:37:03,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:37:03,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595829868] [2020-08-27 21:37:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:37:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:03,603 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:37:03,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:37:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:03,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:37:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:03,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:37:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:03,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:03,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:37:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:03,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:37:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:03,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-27 21:37:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:03,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-27 21:37:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:37:03,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595829868] [2020-08-27 21:37:03,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:37:03,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-27 21:37:03,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518847360] [2020-08-27 21:37:03,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-27 21:37:03,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:37:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-27 21:37:03,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:37:03,736 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 9 states. [2020-08-27 21:37:04,141 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:37:04,520 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:04,855 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:05,151 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:06,061 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:37:08,310 INFO L93 Difference]: Finished difference Result 448 states and 568 transitions. [2020-08-27 21:37:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-27 21:37:08,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-27 21:37:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:37:08,317 INFO L225 Difference]: With dead ends: 448 [2020-08-27 21:37:08,318 INFO L226 Difference]: Without dead ends: 344 [2020-08-27 21:37:08,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-08-27 21:37:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-08-27 21:37:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 279. [2020-08-27 21:37:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-08-27 21:37:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 342 transitions. [2020-08-27 21:37:08,406 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 342 transitions. Word has length 56 [2020-08-27 21:37:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:37:08,406 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 342 transitions. [2020-08-27 21:37:08,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-27 21:37:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 342 transitions. [2020-08-27 21:37:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-27 21:37:08,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:37:08,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:37:08,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:37:08,410 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:37:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:37:08,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1476511447, now seen corresponding path program 1 times [2020-08-27 21:37:08,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:37:08,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547349687] [2020-08-27 21:37:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:37:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:08,756 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:37:08,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:37:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:08,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:37:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:08,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:37:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:08,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:08,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:37:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:08,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:37:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:08,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:37:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:08,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-27 21:37:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:08,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-27 21:37:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:37:08,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547349687] [2020-08-27 21:37:08,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:37:08,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-27 21:37:08,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087963863] [2020-08-27 21:37:08,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-27 21:37:08,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:37:08,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-27 21:37:08,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:37:08,904 INFO L87 Difference]: Start difference. First operand 279 states and 342 transitions. Second operand 9 states. [2020-08-27 21:37:09,363 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:37:10,547 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:11,014 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:37:11,413 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:11,809 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:37:13,536 INFO L93 Difference]: Finished difference Result 895 states and 1185 transitions. [2020-08-27 21:37:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-27 21:37:13,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-08-27 21:37:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:37:13,544 INFO L225 Difference]: With dead ends: 895 [2020-08-27 21:37:13,545 INFO L226 Difference]: Without dead ends: 644 [2020-08-27 21:37:13,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-27 21:37:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-08-27 21:37:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 506. [2020-08-27 21:37:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-08-27 21:37:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 624 transitions. [2020-08-27 21:37:13,673 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 624 transitions. Word has length 62 [2020-08-27 21:37:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:37:13,674 INFO L479 AbstractCegarLoop]: Abstraction has 506 states and 624 transitions. [2020-08-27 21:37:13,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-27 21:37:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 624 transitions. [2020-08-27 21:37:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-27 21:37:13,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:37:13,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:37:13,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:37:13,679 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:37:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:37:13,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1658122107, now seen corresponding path program 1 times [2020-08-27 21:37:13,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:37:13,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772363022] [2020-08-27 21:37:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:37:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,063 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:37:14,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:37:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:37:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:37:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:37:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:37:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-27 21:37:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-27 21:37:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-27 21:37:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-27 21:37:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:37:14,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772363022] [2020-08-27 21:37:14,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:37:14,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-27 21:37:14,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029576859] [2020-08-27 21:37:14,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:37:14,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:37:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:37:14,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:37:14,203 INFO L87 Difference]: Start difference. First operand 506 states and 624 transitions. Second operand 10 states. [2020-08-27 21:37:14,632 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:37:15,771 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:16,138 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:16,433 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:17,334 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:37:18,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:37:18,759 INFO L93 Difference]: Finished difference Result 1423 states and 1942 transitions. [2020-08-27 21:37:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-27 21:37:18,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-08-27 21:37:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:37:18,769 INFO L225 Difference]: With dead ends: 1423 [2020-08-27 21:37:18,770 INFO L226 Difference]: Without dead ends: 945 [2020-08-27 21:37:18,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2020-08-27 21:37:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2020-08-27 21:37:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 749. [2020-08-27 21:37:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-08-27 21:37:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 911 transitions. [2020-08-27 21:37:18,944 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 911 transitions. Word has length 66 [2020-08-27 21:37:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:37:18,945 INFO L479 AbstractCegarLoop]: Abstraction has 749 states and 911 transitions. [2020-08-27 21:37:18,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:37:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 911 transitions. [2020-08-27 21:37:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-27 21:37:18,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:37:18,949 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-27 21:37:18,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:37:18,949 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:37:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:37:18,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1979078966, now seen corresponding path program 1 times [2020-08-27 21:37:18,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:37:18,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720135803] [2020-08-27 21:37:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:37:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,272 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:37:19,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:37:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:37:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:37:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:37:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:37:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-27 21:37:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-27 21:37:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:37:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-27 21:37:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-27 21:37:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-27 21:37:19,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720135803] [2020-08-27 21:37:19,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:37:19,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-27 21:37:19,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054600881] [2020-08-27 21:37:19,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:37:19,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:37:19,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:37:19,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:37:19,504 INFO L87 Difference]: Start difference. First operand 749 states and 911 transitions. Second operand 10 states. [2020-08-27 21:37:20,005 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:37:21,273 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:21,589 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-27 21:37:21,953 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:22,282 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:37:24,830 INFO L93 Difference]: Finished difference Result 2518 states and 3561 transitions. [2020-08-27 21:37:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-27 21:37:24,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-08-27 21:37:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:37:24,852 INFO L225 Difference]: With dead ends: 2518 [2020-08-27 21:37:24,852 INFO L226 Difference]: Without dead ends: 1797 [2020-08-27 21:37:24,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-08-27 21:37:24,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2020-08-27 21:37:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1359. [2020-08-27 21:37:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1359 states. [2020-08-27 21:37:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1650 transitions. [2020-08-27 21:37:25,261 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1650 transitions. Word has length 103 [2020-08-27 21:37:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:37:25,261 INFO L479 AbstractCegarLoop]: Abstraction has 1359 states and 1650 transitions. [2020-08-27 21:37:25,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:37:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1650 transitions. [2020-08-27 21:37:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-27 21:37:25,269 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:37:25,270 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-27 21:37:25,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:37:25,270 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:37:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:37:25,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1738538837, now seen corresponding path program 1 times [2020-08-27 21:37:25,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:37:25,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606551844] [2020-08-27 21:37:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:37:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,634 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:37:25,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:37:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:37:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:37:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:37:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:37:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-27 21:37:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-27 21:37:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:37:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-27 21:37:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-27 21:37:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-27 21:37:25,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606551844] [2020-08-27 21:37:25,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:37:25,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-27 21:37:25,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728286929] [2020-08-27 21:37:25,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:37:25,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:37:25,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:37:25,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:37:25,882 INFO L87 Difference]: Start difference. First operand 1359 states and 1650 transitions. Second operand 10 states. [2020-08-27 21:37:27,208 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:27,557 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-27 21:37:27,895 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:28,217 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:37:29,784 INFO L93 Difference]: Finished difference Result 3144 states and 4258 transitions. [2020-08-27 21:37:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-27 21:37:29,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-08-27 21:37:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:37:29,803 INFO L225 Difference]: With dead ends: 3144 [2020-08-27 21:37:29,803 INFO L226 Difference]: Without dead ends: 1813 [2020-08-27 21:37:29,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-08-27 21:37:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2020-08-27 21:37:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1399. [2020-08-27 21:37:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1399 states. [2020-08-27 21:37:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1690 transitions. [2020-08-27 21:37:30,169 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 1690 transitions. Word has length 103 [2020-08-27 21:37:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:37:30,170 INFO L479 AbstractCegarLoop]: Abstraction has 1399 states and 1690 transitions. [2020-08-27 21:37:30,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:37:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 1690 transitions. [2020-08-27 21:37:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-27 21:37:30,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:37:30,175 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-27 21:37:30,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:37:30,175 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:37:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:37:30,176 INFO L82 PathProgramCache]: Analyzing trace with hash 189733865, now seen corresponding path program 1 times [2020-08-27 21:37:30,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:37:30,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879273057] [2020-08-27 21:37:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:37:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,527 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:37:30,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:37:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:37:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:37:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:37:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:37:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-27 21:37:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-27 21:37:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:37:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-27 21:37:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-27 21:37:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-27 21:37:30,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879273057] [2020-08-27 21:37:30,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:37:30,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-27 21:37:30,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618554914] [2020-08-27 21:37:30,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-27 21:37:30,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:37:30,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-27 21:37:30,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:37:30,726 INFO L87 Difference]: Start difference. First operand 1399 states and 1690 transitions. Second operand 12 states. [2020-08-27 21:37:31,323 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:31,605 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:31,895 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:32,806 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:33,141 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:33,438 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:37:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:37:35,046 INFO L93 Difference]: Finished difference Result 2768 states and 3642 transitions. [2020-08-27 21:37:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-27 21:37:35,046 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 103 [2020-08-27 21:37:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:37:35,056 INFO L225 Difference]: With dead ends: 2768 [2020-08-27 21:37:35,056 INFO L226 Difference]: Without dead ends: 1397 [2020-08-27 21:37:35,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-08-27 21:37:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2020-08-27 21:37:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1119. [2020-08-27 21:37:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2020-08-27 21:37:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1322 transitions. [2020-08-27 21:37:35,306 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1322 transitions. Word has length 103 [2020-08-27 21:37:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:37:35,307 INFO L479 AbstractCegarLoop]: Abstraction has 1119 states and 1322 transitions. [2020-08-27 21:37:35,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-27 21:37:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1322 transitions. [2020-08-27 21:37:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-27 21:37:35,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:37:35,315 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-27 21:37:35,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:37:35,315 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:37:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:37:35,316 INFO L82 PathProgramCache]: Analyzing trace with hash -237992882, now seen corresponding path program 1 times [2020-08-27 21:37:35,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:37:35,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617189936] [2020-08-27 21:37:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:37:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,651 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:37:35,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:37:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:37:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:37:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:37:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:37:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-27 21:37:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-27 21:37:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-27 21:37:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:37:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-27 21:37:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-27 21:37:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-27 21:37:35,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617189936] [2020-08-27 21:37:35,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:37:35,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-27 21:37:35,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309115737] [2020-08-27 21:37:35,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-27 21:37:35,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:37:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-27 21:37:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-08-27 21:37:35,981 INFO L87 Difference]: Start difference. First operand 1119 states and 1322 transitions. Second operand 18 states. [2020-08-27 21:37:36,559 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:37:36,963 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-27 21:37:37,358 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-27 21:37:37,678 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-27 21:37:38,492 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:37:39,183 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:39,680 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:41,264 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:41,663 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:42,046 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:42,408 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:43,034 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 191 [2020-08-27 21:37:43,718 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 191 [2020-08-27 21:37:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:37:45,973 INFO L93 Difference]: Finished difference Result 2496 states and 3148 transitions. [2020-08-27 21:37:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-27 21:37:45,973 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 107 [2020-08-27 21:37:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:37:45,983 INFO L225 Difference]: With dead ends: 2496 [2020-08-27 21:37:45,983 INFO L226 Difference]: Without dead ends: 1405 [2020-08-27 21:37:45,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2020-08-27 21:37:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2020-08-27 21:37:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1109. [2020-08-27 21:37:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-08-27 21:37:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1299 transitions. [2020-08-27 21:37:46,222 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1299 transitions. Word has length 107 [2020-08-27 21:37:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:37:46,225 INFO L479 AbstractCegarLoop]: Abstraction has 1109 states and 1299 transitions. [2020-08-27 21:37:46,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-27 21:37:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1299 transitions. [2020-08-27 21:37:46,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-27 21:37:46,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:37:46,232 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-08-27 21:37:46,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:37:46,232 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:37:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:37:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash 926596768, now seen corresponding path program 1 times [2020-08-27 21:37:46,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:37:46,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393055004] [2020-08-27 21:37:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:37:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,701 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:37:46,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:37:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:37:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:37:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:37:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-27 21:37:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-27 21:37:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-27 21:37:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:37:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:37:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-27 21:37:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-27 21:37:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-27 21:37:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-27 21:37:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:46,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:47,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:37:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:47,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-27 21:37:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:47,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:37:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:47,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-27 21:37:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:47,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-27 21:37:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:37:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-27 21:37:47,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393055004] [2020-08-27 21:37:47,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:37:47,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-27 21:37:47,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60844129] [2020-08-27 21:37:47,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-27 21:37:47,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:37:47,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-27 21:37:47,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-08-27 21:37:47,088 INFO L87 Difference]: Start difference. First operand 1109 states and 1299 transitions. Second operand 19 states. [2020-08-27 21:37:47,862 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:37:48,278 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-27 21:37:48,627 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-27 21:37:48,956 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-27 21:37:49,871 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:37:50,674 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:51,182 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:37:52,855 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 191