/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:03:00,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:03:00,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:03:00,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:03:00,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:03:00,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:03:00,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:03:00,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:03:00,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:03:00,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:03:00,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:03:00,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:03:00,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:03:00,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:03:00,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:03:00,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:03:00,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:03:00,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:03:00,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:03:00,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:03:00,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:03:00,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:03:00,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:03:00,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:03:00,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:03:00,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:03:00,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:03:00,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:03:00,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:03:00,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:03:00,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:03:00,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:03:00,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:03:00,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:03:00,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:03:00,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:03:00,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:03:00,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:03:00,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:03:00,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:03:00,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:03:00,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:03:00,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:03:00,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:03:00,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:03:00,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:03:00,330 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:03:00,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:03:00,331 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:03:00,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:03:00,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:03:00,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:03:00,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:03:00,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:03:00,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:03:00,333 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:03:00,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:03:00,334 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:03:00,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:03:00,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:03:00,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:03:00,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:03:00,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:03:00,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:03:00,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:03:00,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:03:00,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:03:00,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:03:00,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:03:00,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:03:00,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:03:00,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:03:00,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:03:00,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:03:00,678 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:03:00,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:03:00,679 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:03:00,680 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-18 16:03:00,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb8cef9d6/d84d56dfa1324c488a15988be1dc9f2f/FLAGfec4ae025 [2020-08-18 16:03:01,212 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:03:01,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-18 16:03:01,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb8cef9d6/d84d56dfa1324c488a15988be1dc9f2f/FLAGfec4ae025 [2020-08-18 16:03:01,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb8cef9d6/d84d56dfa1324c488a15988be1dc9f2f [2020-08-18 16:03:01,526 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:03:01,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:03:01,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:03:01,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:03:01,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:03:01,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:03:01" (1/1) ... [2020-08-18 16:03:01,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c5ba0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:01, skipping insertion in model container [2020-08-18 16:03:01,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:03:01" (1/1) ... [2020-08-18 16:03:01,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:03:01,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:03:02,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:03:02,015 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:03:02,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:03:02,179 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:03:02,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:02 WrapperNode [2020-08-18 16:03:02,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:03:02,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:03:02,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:03:02,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:03:02,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:02" (1/1) ... [2020-08-18 16:03:02,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:02" (1/1) ... [2020-08-18 16:03:02,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:02" (1/1) ... [2020-08-18 16:03:02,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:02" (1/1) ... [2020-08-18 16:03:02,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:02" (1/1) ... [2020-08-18 16:03:02,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:02" (1/1) ... [2020-08-18 16:03:02,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:02" (1/1) ... [2020-08-18 16:03:02,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:03:02,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:03:02,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:03:02,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:03:02,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:03:02,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:03:02,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:03:02,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 16:03:02,329 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 16:03:02,330 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 16:03:02,330 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 16:03:02,331 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 16:03:02,331 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 16:03:02,331 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 16:03:02,331 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 16:03:02,331 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 16:03:02,332 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 16:03:02,332 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 16:03:02,333 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 16:03:02,333 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 16:03:02,334 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 16:03:02,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 16:03:02,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 16:03:02,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 16:03:02,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 16:03:02,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 16:03:02,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 16:03:02,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 16:03:02,335 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 16:03:02,337 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 16:03:02,337 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 16:03:02,338 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 16:03:02,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 16:03:02,338 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 16:03:02,338 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 16:03:02,339 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 16:03:02,339 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 16:03:02,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:03:02,339 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 16:03:02,339 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 16:03:02,340 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 16:03:02,340 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 16:03:02,340 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 16:03:02,340 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 16:03:02,340 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 16:03:02,340 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 16:03:02,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:03:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:03:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 16:03:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 16:03:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 16:03:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 16:03:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 16:03:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 16:03:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 16:03:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 16:03:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 16:03:02,342 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 16:03:02,342 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 16:03:02,342 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 16:03:02,342 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 16:03:02,342 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 16:03:02,342 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 16:03:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 16:03:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 16:03:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 16:03:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 16:03:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 16:03:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 16:03:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 16:03:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 16:03:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:03:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 16:03:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:03:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 16:03:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 16:03:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:03:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 16:03:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:03:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 16:03:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 16:03:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:03:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 16:03:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 16:03:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:03:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 16:03:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 16:03:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 16:03:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 16:03:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 16:03:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 16:03:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 16:03:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 16:03:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 16:03:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 16:03:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 16:03:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:03:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 16:03:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:03:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 16:03:02,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:03:03,347 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:03:03,347 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 16:03:03,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:03:03 BoogieIcfgContainer [2020-08-18 16:03:03,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:03:03,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:03:03,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:03:03,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:03:03,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:03:01" (1/3) ... [2020-08-18 16:03:03,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab21b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:03:03, skipping insertion in model container [2020-08-18 16:03:03,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:03:02" (2/3) ... [2020-08-18 16:03:03,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab21b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:03:03, skipping insertion in model container [2020-08-18 16:03:03,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:03:03" (3/3) ... [2020-08-18 16:03:03,360 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product51.cil.c [2020-08-18 16:03:03,370 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:03:03,377 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:03:03,391 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:03:03,415 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:03:03,415 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:03:03,415 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:03:03,415 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:03:03,416 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:03:03,416 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:03:03,416 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:03:03,416 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:03:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-08-18 16:03:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 16:03:03,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:03,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:03,448 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:03,454 INFO L82 PathProgramCache]: Analyzing trace with hash -199381509, now seen corresponding path program 1 times [2020-08-18 16:03:03,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:03,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681991784] [2020-08-18 16:03:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:04,144 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:04,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:04,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:04,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:04,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:04,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:04,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 16:03:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:04,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 16:03:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:04,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681991784] [2020-08-18 16:03:04,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:04,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:03:04,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149099177] [2020-08-18 16:03:04,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:03:04,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:04,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:03:04,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:03:04,276 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-08-18 16:03:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:05,359 INFO L93 Difference]: Finished difference Result 311 states and 407 transitions. [2020-08-18 16:03:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:03:05,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 16:03:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:05,375 INFO L225 Difference]: With dead ends: 311 [2020-08-18 16:03:05,375 INFO L226 Difference]: Without dead ends: 168 [2020-08-18 16:03:05,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:03:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-18 16:03:05,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-08-18 16:03:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 16:03:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-08-18 16:03:05,469 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 46 [2020-08-18 16:03:05,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:05,470 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-08-18 16:03:05,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:03:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-08-18 16:03:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 16:03:05,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:05,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:05,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:03:05,475 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:05,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:05,479 INFO L82 PathProgramCache]: Analyzing trace with hash 822116352, now seen corresponding path program 1 times [2020-08-18 16:03:05,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:05,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475856379] [2020-08-18 16:03:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:05,806 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:05,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:05,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:05,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:05,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:05,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:05,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 16:03:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:05,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 16:03:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:05,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475856379] [2020-08-18 16:03:05,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:05,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:03:05,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773404537] [2020-08-18 16:03:05,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:03:05,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:05,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:03:05,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:03:05,849 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 4 states. [2020-08-18 16:03:06,231 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:07,060 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-08-18 16:03:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:03:07,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 16:03:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:07,065 INFO L225 Difference]: With dead ends: 238 [2020-08-18 16:03:07,065 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 16:03:07,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:03:07,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 16:03:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2020-08-18 16:03:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 16:03:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-08-18 16:03:07,103 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 47 [2020-08-18 16:03:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:07,104 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-08-18 16:03:07,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:03:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-08-18 16:03:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 16:03:07,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:07,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:07,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:03:07,107 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:07,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:07,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1772796698, now seen corresponding path program 1 times [2020-08-18 16:03:07,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:07,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506491393] [2020-08-18 16:03:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:07,442 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:07,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:07,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:07,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:07,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:07,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:07,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 16:03:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:07,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 16:03:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:07,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506491393] [2020-08-18 16:03:07,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:07,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 16:03:07,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255349910] [2020-08-18 16:03:07,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:03:07,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:07,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:03:07,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:03:07,524 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 8 states. [2020-08-18 16:03:07,876 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:08,190 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:08,427 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:08,650 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:09,341 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:10,988 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2020-08-18 16:03:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 16:03:10,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 16:03:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:10,995 INFO L225 Difference]: With dead ends: 427 [2020-08-18 16:03:10,995 INFO L226 Difference]: Without dead ends: 326 [2020-08-18 16:03:10,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 16:03:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-18 16:03:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2020-08-18 16:03:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-18 16:03:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 324 transitions. [2020-08-18 16:03:11,075 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 324 transitions. Word has length 51 [2020-08-18 16:03:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:11,076 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 324 transitions. [2020-08-18 16:03:11,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:03:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 324 transitions. [2020-08-18 16:03:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 16:03:11,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:11,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:11,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:03:11,079 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:11,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1539786498, now seen corresponding path program 1 times [2020-08-18 16:03:11,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:11,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978876768] [2020-08-18 16:03:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:11,384 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:11,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:11,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:11,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:11,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:11,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:11,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 16:03:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:11,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 16:03:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:11,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 16:03:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:11,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978876768] [2020-08-18 16:03:11,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:11,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 16:03:11,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402621729] [2020-08-18 16:03:11,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:03:11,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:11,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:03:11,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:03:11,491 INFO L87 Difference]: Start difference. First operand 268 states and 324 transitions. Second operand 8 states. [2020-08-18 16:03:11,831 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:12,889 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:13,200 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:13,469 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:13,751 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:14,188 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:14,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:14,994 INFO L93 Difference]: Finished difference Result 862 states and 1117 transitions. [2020-08-18 16:03:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:03:14,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 16:03:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:15,001 INFO L225 Difference]: With dead ends: 862 [2020-08-18 16:03:15,001 INFO L226 Difference]: Without dead ends: 618 [2020-08-18 16:03:15,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 16:03:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-18 16:03:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 491. [2020-08-18 16:03:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-08-18 16:03:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 598 transitions. [2020-08-18 16:03:15,124 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 598 transitions. Word has length 57 [2020-08-18 16:03:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:15,125 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 598 transitions. [2020-08-18 16:03:15,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:03:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 598 transitions. [2020-08-18 16:03:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 16:03:15,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:15,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:15,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:03:15,129 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1493126654, now seen corresponding path program 1 times [2020-08-18 16:03:15,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:15,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864879596] [2020-08-18 16:03:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:15,454 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:15,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:15,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:15,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:15,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:15,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:15,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:03:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:15,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 16:03:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:15,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 16:03:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:15,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 16:03:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:15,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864879596] [2020-08-18 16:03:15,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:15,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 16:03:15,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443898579] [2020-08-18 16:03:15,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:03:15,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:03:15,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:03:15,562 INFO L87 Difference]: Start difference. First operand 491 states and 598 transitions. Second operand 9 states. [2020-08-18 16:03:15,880 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:16,746 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:17,024 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:17,269 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:17,741 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:18,037 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:18,841 INFO L93 Difference]: Finished difference Result 1371 states and 1840 transitions. [2020-08-18 16:03:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 16:03:18,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 16:03:18,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:18,849 INFO L225 Difference]: With dead ends: 1371 [2020-08-18 16:03:18,849 INFO L226 Difference]: Without dead ends: 904 [2020-08-18 16:03:18,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 16:03:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-08-18 16:03:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 723. [2020-08-18 16:03:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-08-18 16:03:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 891 transitions. [2020-08-18 16:03:18,990 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 891 transitions. Word has length 61 [2020-08-18 16:03:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:18,990 INFO L479 AbstractCegarLoop]: Abstraction has 723 states and 891 transitions. [2020-08-18 16:03:18,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:03:18,991 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 891 transitions. [2020-08-18 16:03:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 16:03:18,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:18,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:18,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:03:18,994 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:18,994 INFO L82 PathProgramCache]: Analyzing trace with hash 807556796, now seen corresponding path program 1 times [2020-08-18 16:03:18,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:18,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385583069] [2020-08-18 16:03:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,240 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:19,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:03:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 16:03:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:03:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:03:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 16:03:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 16:03:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:19,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385583069] [2020-08-18 16:03:19,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:19,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 16:03:19,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669887309] [2020-08-18 16:03:19,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:03:19,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:19,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:03:19,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:03:19,401 INFO L87 Difference]: Start difference. First operand 723 states and 891 transitions. Second operand 9 states. [2020-08-18 16:03:20,393 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:20,632 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 16:03:20,878 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:21,119 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:22,162 INFO L93 Difference]: Finished difference Result 1679 states and 2233 transitions. [2020-08-18 16:03:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 16:03:22,163 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-18 16:03:22,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:22,173 INFO L225 Difference]: With dead ends: 1679 [2020-08-18 16:03:22,174 INFO L226 Difference]: Without dead ends: 980 [2020-08-18 16:03:22,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 16:03:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-08-18 16:03:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 749. [2020-08-18 16:03:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-08-18 16:03:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 919 transitions. [2020-08-18 16:03:22,339 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 919 transitions. Word has length 83 [2020-08-18 16:03:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:22,340 INFO L479 AbstractCegarLoop]: Abstraction has 749 states and 919 transitions. [2020-08-18 16:03:22,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:03:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 919 transitions. [2020-08-18 16:03:22,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 16:03:22,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:22,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:22,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:03:22,344 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash 830189050, now seen corresponding path program 1 times [2020-08-18 16:03:22,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:22,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279533506] [2020-08-18 16:03:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,622 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:22,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:03:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 16:03:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:03:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:03:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 16:03:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 16:03:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:22,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279533506] [2020-08-18 16:03:22,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:22,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 16:03:22,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318847268] [2020-08-18 16:03:22,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:03:22,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:22,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:03:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:03:22,831 INFO L87 Difference]: Start difference. First operand 749 states and 919 transitions. Second operand 11 states. [2020-08-18 16:03:23,699 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:03:23,918 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:24,137 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:24,740 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:25,001 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:25,236 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:03:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:26,547 INFO L93 Difference]: Finished difference Result 1733 states and 2344 transitions. [2020-08-18 16:03:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:03:26,547 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-18 16:03:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:26,554 INFO L225 Difference]: With dead ends: 1733 [2020-08-18 16:03:26,554 INFO L226 Difference]: Without dead ends: 1008 [2020-08-18 16:03:26,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 16:03:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-08-18 16:03:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 765. [2020-08-18 16:03:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-08-18 16:03:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-08-18 16:03:26,699 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 83 [2020-08-18 16:03:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:26,699 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-08-18 16:03:26,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:03:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-08-18 16:03:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 16:03:26,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:26,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:26,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:03:26,705 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1855681049, now seen corresponding path program 1 times [2020-08-18 16:03:26,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:26,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863559360] [2020-08-18 16:03:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,098 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:03:27,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:03:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:03:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:03:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:03:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:03:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:03:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 16:03:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:03:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:03:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:03:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 16:03:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 16:03:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:03:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:03:27,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863559360] [2020-08-18 16:03:27,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:03:27,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 16:03:27,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864301192] [2020-08-18 16:03:27,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:03:27,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:03:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:03:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:03:27,277 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 7 states. [2020-08-18 16:03:27,594 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:28,054 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:03:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:03:30,617 INFO L93 Difference]: Finished difference Result 2622 states and 3569 transitions. [2020-08-18 16:03:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 16:03:30,618 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-08-18 16:03:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:03:30,633 INFO L225 Difference]: With dead ends: 2622 [2020-08-18 16:03:30,634 INFO L226 Difference]: Without dead ends: 1881 [2020-08-18 16:03:30,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-18 16:03:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-08-18 16:03:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1579. [2020-08-18 16:03:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-08-18 16:03:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1949 transitions. [2020-08-18 16:03:30,942 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1949 transitions. Word has length 83 [2020-08-18 16:03:30,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:03:30,942 INFO L479 AbstractCegarLoop]: Abstraction has 1579 states and 1949 transitions. [2020-08-18 16:03:30,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:03:30,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1949 transitions. [2020-08-18 16:03:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 16:03:30,945 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:03:30,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:03:30,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:03:30,946 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:03:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:03:30,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1308897473, now seen corresponding path program 1 times [2020-08-18 16:03:30,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:03:30,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524203189] [2020-08-18 16:03:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:03:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:03:31,006 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:03:31,007 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:03:31,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:03:31,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:03:31 BoogieIcfgContainer [2020-08-18 16:03:31,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:03:31,048 INFO L168 Benchmark]: Toolchain (without parser) took 29521.00 ms. Allocated memory was 140.0 MB in the beginning and 648.0 MB in the end (delta: 508.0 MB). Free memory was 101.7 MB in the beginning and 336.8 MB in the end (delta: -235.1 MB). Peak memory consumption was 272.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:03:31,049 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:03:31,056 INFO L168 Benchmark]: CACSL2BoogieTranslator took 651.72 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.5 MB in the beginning and 170.9 MB in the end (delta: -69.5 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:03:31,060 INFO L168 Benchmark]: Boogie Preprocessor took 86.89 ms. Allocated memory is still 203.4 MB. Free memory was 170.9 MB in the beginning and 166.6 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:03:31,061 INFO L168 Benchmark]: RCFGBuilder took 1084.49 ms. Allocated memory was 203.4 MB in the beginning and 236.5 MB in the end (delta: 33.0 MB). Free memory was 166.6 MB in the beginning and 194.2 MB in the end (delta: -27.6 MB). Peak memory consumption was 81.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:03:31,066 INFO L168 Benchmark]: TraceAbstraction took 27693.30 ms. Allocated memory was 236.5 MB in the beginning and 648.0 MB in the end (delta: 411.6 MB). Free memory was 192.8 MB in the beginning and 336.8 MB in the end (delta: -144.0 MB). Peak memory consumption was 267.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:03:31,068 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 651.72 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.5 MB in the beginning and 170.9 MB in the end (delta: -69.5 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 86.89 ms. Allocated memory is still 203.4 MB. Free memory was 170.9 MB in the beginning and 166.6 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1084.49 ms. Allocated memory was 203.4 MB in the beginning and 236.5 MB in the end (delta: 33.0 MB). Free memory was 166.6 MB in the beginning and 194.2 MB in the end (delta: -27.6 MB). Peak memory consumption was 81.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27693.30 ms. Allocated memory was 236.5 MB in the beginning and 648.0 MB in the end (delta: 411.6 MB). Free memory was 192.8 MB in the beginning and 336.8 MB in the end (delta: -144.0 MB). Peak memory consumption was 267.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 704]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L121] int pumpRunning = 0; [L122] int systemActive = 1; [L503] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L773] int cleanupTimeShifts = 4; [L870] int waterLevel = 1; [L871] int methaneLevelCritical = 0; [L846] int retValue_acc ; [L847] int tmp ; [L851] FCALL select_helpers() [L852] FCALL select_features() [L853] CALL, EXPR valid_product() [L738] int retValue_acc ; [L741] retValue_acc = 1 [L742] return (retValue_acc); [L853] RET, EXPR valid_product() [L853] tmp = valid_product() [L855] COND TRUE \read(tmp) [L857] FCALL setup() [L858] CALL runTest() [L840] CALL test() [L46] int splverifierCounter ; [L47] int tmp ; [L48] int tmp___0 ; [L49] int tmp___1 ; [L50] int tmp___2 ; [L53] splverifierCounter = 0 [L55] COND TRUE 1 [L57] COND TRUE splverifierCounter < 4 [L63] tmp = __VERIFIER_nondet_int() [L65] COND TRUE \read(tmp) [L67] CALL waterRise() [L888] COND TRUE waterLevel < 2 [L889] waterLevel = waterLevel + 1 [L67] RET waterRise() [L73] tmp___0 = __VERIFIER_nondet_int() [L75] COND TRUE \read(tmp___0) [L77] CALL changeMethaneLevel() [L900] COND FALSE !(\read(methaneLevelCritical)) [L903] methaneLevelCritical = 1 [L77] RET changeMethaneLevel() [L83] tmp___2 = __VERIFIER_nondet_int() [L85] COND TRUE \read(tmp___2) [L100] CALL timeShift() [L129] COND FALSE !(\read(pumpRunning)) [L136] COND TRUE \read(systemActive) [L138] CALL processEnvironment() [L184] int tmp ; [L187] COND FALSE !(\read(pumpRunning)) [L202] CALL processEnvironment__wrappee__highWaterSensor() [L158] int tmp ; [L161] COND TRUE ! pumpRunning [L163] CALL, EXPR isHighWaterLevel() [L281] int retValue_acc ; [L282] int tmp ; [L283] int tmp___0 ; [L287] CALL, EXPR isHighWaterSensorDry() [L950] int retValue_acc ; [L953] COND FALSE !(waterLevel < 2) [L957] retValue_acc = 0 [L958] return (retValue_acc); [L287] RET, EXPR isHighWaterSensorDry() [L287] tmp = isHighWaterSensorDry() [L289] COND FALSE !(\read(tmp)) [L292] tmp___0 = 1 [L294] retValue_acc = tmp___0 [L295] return (retValue_acc); [L163] RET, EXPR isHighWaterLevel() [L163] tmp = isHighWaterLevel() [L165] COND TRUE \read(tmp) [L167] CALL activatePump() [L212] pumpRunning = 1 [L167] RET activatePump() [L202] RET processEnvironment__wrappee__highWaterSensor() [L138] RET processEnvironment() [L144] CALL __utac_acc__Specification1_spec__1() [L748] int tmp ; [L749] int tmp___0 ; [L753] CALL, EXPR isMethaneLevelCritical() [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); [L753] RET, EXPR isMethaneLevelCritical() [L753] tmp = isMethaneLevelCritical() [L755] COND TRUE \read(tmp) [L757] CALL, EXPR isPumpRunning() [L236] int retValue_acc ; [L239] retValue_acc = pumpRunning [L240] return (retValue_acc); [L757] RET, EXPR isPumpRunning() [L757] tmp___0 = isPumpRunning() [L759] COND TRUE \read(tmp___0) [L761] CALL __automaton_fail() [L704] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 241 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 27.5s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 22.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 990 SDtfs, 1945 SDslu, 1032 SDs, 0 SdLazy, 5152 SolverSat, 1211 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1579occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 1203 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 150744 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...