/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product60.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:57:06,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:57:06,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:57:06,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:57:06,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:57:06,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:57:06,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:57:06,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:57:06,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:57:06,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:57:06,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:57:06,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:57:06,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:57:06,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:57:06,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:57:06,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:57:06,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:57:06,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:57:06,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:57:06,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:57:06,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:57:06,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:57:06,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:57:06,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:57:06,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:57:06,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:57:06,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:57:06,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:57:06,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:57:06,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:57:06,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:57:06,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:57:06,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:57:06,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:57:06,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:57:06,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:57:06,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:57:06,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:57:06,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:57:06,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:57:06,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:57:06,080 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 20:57:06,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:57:06,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:57:06,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:57:06,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:57:06,106 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:57:06,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:57:06,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:57:06,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:57:06,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:57:06,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:57:06,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:57:06,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:57:06,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:57:06,108 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:57:06,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:57:06,108 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:57:06,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:57:06,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:57:06,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:57:06,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:57:06,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:57:06,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:57:06,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:57:06,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:57:06,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:57:06,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:57:06,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:57:06,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:57:06,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:57:06,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 20:57:06,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:57:06,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:57:06,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:57:06,457 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:57:06,457 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:57:06,458 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product60.cil.c [2020-08-18 20:57:06,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fa232cc3/bfa5a0e5e9434597994162a5d9298651/FLAG38ae7d2be [2020-08-18 20:57:07,064 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:57:07,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product60.cil.c [2020-08-18 20:57:07,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fa232cc3/bfa5a0e5e9434597994162a5d9298651/FLAG38ae7d2be [2020-08-18 20:57:07,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fa232cc3/bfa5a0e5e9434597994162a5d9298651 [2020-08-18 20:57:07,398 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:57:07,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:57:07,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:57:07,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:57:07,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:57:07,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:57:07" (1/1) ... [2020-08-18 20:57:07,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217e3fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:07, skipping insertion in model container [2020-08-18 20:57:07,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:57:07" (1/1) ... [2020-08-18 20:57:07,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:57:07,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:57:07,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:57:07,923 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:57:08,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:57:08,049 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:57:08,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:08 WrapperNode [2020-08-18 20:57:08,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:57:08,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:57:08,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:57:08,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:57:08,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:08" (1/1) ... [2020-08-18 20:57:08,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:08" (1/1) ... [2020-08-18 20:57:08,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:08" (1/1) ... [2020-08-18 20:57:08,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:08" (1/1) ... [2020-08-18 20:57:08,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:08" (1/1) ... [2020-08-18 20:57:08,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:08" (1/1) ... [2020-08-18 20:57:08,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:08" (1/1) ... [2020-08-18 20:57:08,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:57:08,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:57:08,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:57:08,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:57:08,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:08" (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 20:57:08,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:57:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:57:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 20:57:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 20:57:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 20:57:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 20:57:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 20:57:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 20:57:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 20:57:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 20:57:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 20:57:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 20:57:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 20:57:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 20:57:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 20:57:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 20:57:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 20:57:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 20:57:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-18 20:57:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 20:57:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 20:57:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 20:57:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 20:57:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 20:57:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 20:57:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 20:57:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 20:57:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 20:57:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 20:57:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 20:57:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 20:57:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 20:57:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 20:57:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 20:57:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 20:57:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 20:57:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 20:57:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 20:57:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 20:57:08,218 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 20:57:08,218 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 20:57:08,218 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 20:57:08,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:57:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:57:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:57:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 20:57:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 20:57:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 20:57:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 20:57:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 20:57:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 20:57:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 20:57:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 20:57:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 20:57:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 20:57:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 20:57:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 20:57:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 20:57:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 20:57:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 20:57:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 20:57:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 20:57:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-18 20:57:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 20:57:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 20:57:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 20:57:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 20:57:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 20:57:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 20:57:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 20:57:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:57:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 20:57:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 20:57:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 20:57:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 20:57:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 20:57:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 20:57:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 20:57:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 20:57:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:57:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 20:57:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 20:57:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:57:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 20:57:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 20:57:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:57:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 20:57:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 20:57:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 20:57:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 20:57:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 20:57:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 20:57:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 20:57:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 20:57:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 20:57:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 20:57:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:57:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:57:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 20:57:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:57:09,244 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:57:09,245 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 20:57:09,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:57:09 BoogieIcfgContainer [2020-08-18 20:57:09,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:57:09,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:57:09,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:57:09,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:57:09,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:57:07" (1/3) ... [2020-08-18 20:57:09,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181cdb63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:57:09, skipping insertion in model container [2020-08-18 20:57:09,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:57:08" (2/3) ... [2020-08-18 20:57:09,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181cdb63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:57:09, skipping insertion in model container [2020-08-18 20:57:09,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:57:09" (3/3) ... [2020-08-18 20:57:09,259 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product60.cil.c [2020-08-18 20:57:09,270 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:57:09,278 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:57:09,292 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:57:09,318 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:57:09,318 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:57:09,319 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:57:09,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:57:09,319 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:57:09,319 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:57:09,320 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:57:09,320 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:57:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-08-18 20:57:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 20:57:09,354 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:57:09,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:57:09,356 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:57:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:57:09,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1529441714, now seen corresponding path program 1 times [2020-08-18 20:57:09,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:57:09,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835943048] [2020-08-18 20:57:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:57:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:10,102 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:57:10,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:57:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:10,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:57:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:10,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:57:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:10,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:57:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:10,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:57:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:10,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:57:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:10,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:57:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:10,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 20:57:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:10,258 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 20:57:10,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835943048] [2020-08-18 20:57:10,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:57:10,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:57:10,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920065069] [2020-08-18 20:57:10,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:57:10,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:57:10,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:57:10,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:57:10,287 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 3 states. [2020-08-18 20:57:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:57:11,616 INFO L93 Difference]: Finished difference Result 358 states and 461 transitions. [2020-08-18 20:57:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:57:11,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-18 20:57:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:57:11,634 INFO L225 Difference]: With dead ends: 358 [2020-08-18 20:57:11,634 INFO L226 Difference]: Without dead ends: 193 [2020-08-18 20:57:11,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 20:57:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-18 20:57:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2020-08-18 20:57:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-18 20:57:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 183 transitions. [2020-08-18 20:57:11,762 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 183 transitions. Word has length 52 [2020-08-18 20:57:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:57:11,762 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 183 transitions. [2020-08-18 20:57:11,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:57:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 183 transitions. [2020-08-18 20:57:11,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 20:57:11,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:57:11,767 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] [2020-08-18 20:57:11,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:57:11,768 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:57:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:57:11,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2080089166, now seen corresponding path program 1 times [2020-08-18 20:57:11,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:57:11,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368971145] [2020-08-18 20:57:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:57:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:12,090 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:57:12,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:57:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:12,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:57:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:12,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:57:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:12,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:57:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:12,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:57:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:12,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 20:57:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:12,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:57:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:12,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 20:57:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:12,151 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 20:57:12,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368971145] [2020-08-18 20:57:12,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:57:12,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 20:57:12,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122208736] [2020-08-18 20:57:12,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 20:57:12,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:57:12,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 20:57:12,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 20:57:12,156 INFO L87 Difference]: Start difference. First operand 156 states and 183 transitions. Second operand 4 states. [2020-08-18 20:57:12,572 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:57:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:57:13,517 INFO L93 Difference]: Finished difference Result 281 states and 340 transitions. [2020-08-18 20:57:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:57:13,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-18 20:57:13,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:57:13,522 INFO L225 Difference]: With dead ends: 281 [2020-08-18 20:57:13,523 INFO L226 Difference]: Without dead ends: 177 [2020-08-18 20:57:13,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 20:57:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-08-18 20:57:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2020-08-18 20:57:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-18 20:57:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2020-08-18 20:57:13,569 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 53 [2020-08-18 20:57:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:57:13,569 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2020-08-18 20:57:13,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 20:57:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2020-08-18 20:57:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 20:57:13,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:57:13,572 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] [2020-08-18 20:57:13,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:57:13,573 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:57:13,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:57:13,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1856420908, now seen corresponding path program 1 times [2020-08-18 20:57:13,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:57:13,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125781616] [2020-08-18 20:57:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:57:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:13,894 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:57:13,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:57:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:13,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:57:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:13,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:57:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:13,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:57:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:13,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:57:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:13,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:57:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:13,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 20:57:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:13,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 20:57:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:13,987 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 20:57:13,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125781616] [2020-08-18 20:57:13,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:57:13,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 20:57:13,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555066092] [2020-08-18 20:57:13,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:57:13,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:57:13,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:57:13,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:57:13,991 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand 8 states. [2020-08-18 20:57:14,357 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:57:14,662 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:57:14,919 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:57:15,144 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:57:15,835 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:57:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:57:18,072 INFO L93 Difference]: Finished difference Result 506 states and 621 transitions. [2020-08-18 20:57:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:57:18,077 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-18 20:57:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:57:18,083 INFO L225 Difference]: With dead ends: 506 [2020-08-18 20:57:18,083 INFO L226 Difference]: Without dead ends: 383 [2020-08-18 20:57:18,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 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 20:57:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-08-18 20:57:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 314. [2020-08-18 20:57:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-18 20:57:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 377 transitions. [2020-08-18 20:57:18,167 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 377 transitions. Word has length 58 [2020-08-18 20:57:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:57:18,167 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 377 transitions. [2020-08-18 20:57:18,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:57:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 377 transitions. [2020-08-18 20:57:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 20:57:18,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:57:18,171 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] [2020-08-18 20:57:18,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:57:18,172 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:57:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:57:18,172 INFO L82 PathProgramCache]: Analyzing trace with hash 425111279, now seen corresponding path program 1 times [2020-08-18 20:57:18,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:57:18,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857270628] [2020-08-18 20:57:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:57:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:18,480 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:57:18,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:57:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:18,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:57:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:18,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:57:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:18,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:57:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:18,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:57:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:18,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 20:57:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:18,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 20:57:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:18,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 20:57:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:18,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 20:57:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:18,576 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 20:57:18,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857270628] [2020-08-18 20:57:18,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:57:18,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 20:57:18,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061566267] [2020-08-18 20:57:18,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:57:18,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:57:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:57:18,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:57:18,579 INFO L87 Difference]: Start difference. First operand 314 states and 377 transitions. Second operand 8 states. [2020-08-18 20:57:18,893 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:57:20,317 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:57:20,679 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:57:20,946 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:57:21,200 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:57:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:57:22,172 INFO L93 Difference]: Finished difference Result 973 states and 1259 transitions. [2020-08-18 20:57:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 20:57:22,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-18 20:57:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:57:22,179 INFO L225 Difference]: With dead ends: 973 [2020-08-18 20:57:22,179 INFO L226 Difference]: Without dead ends: 683 [2020-08-18 20:57:22,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-18 20:57:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2020-08-18 20:57:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 609. [2020-08-18 20:57:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2020-08-18 20:57:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 743 transitions. [2020-08-18 20:57:22,306 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 743 transitions. Word has length 63 [2020-08-18 20:57:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:57:22,307 INFO L479 AbstractCegarLoop]: Abstraction has 609 states and 743 transitions. [2020-08-18 20:57:22,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:57:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 743 transitions. [2020-08-18 20:57:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 20:57:22,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:57:22,311 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] [2020-08-18 20:57:22,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:57:22,312 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:57:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:57:22,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1458119221, now seen corresponding path program 1 times [2020-08-18 20:57:22,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:57:22,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475498590] [2020-08-18 20:57:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:57:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,579 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:57:22,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:57:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:57:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:57:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:57:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:57:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 20:57:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 20:57:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 20:57:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 20:57:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 20:57:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:57:22,659 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 20:57:22,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475498590] [2020-08-18 20:57:22,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:57:22,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:57:22,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386540810] [2020-08-18 20:57:22,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:57:22,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:57:22,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:57:22,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:57:22,662 INFO L87 Difference]: Start difference. First operand 609 states and 743 transitions. Second operand 6 states. [2020-08-18 20:57:22,972 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:57:24,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:57:24,840 INFO L93 Difference]: Finished difference Result 1435 states and 1848 transitions. [2020-08-18 20:57:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 20:57:24,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-08-18 20:57:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:57:24,848 INFO L225 Difference]: With dead ends: 1435 [2020-08-18 20:57:24,848 INFO L226 Difference]: Without dead ends: 850 [2020-08-18 20:57:24,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:57:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-08-18 20:57:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 777. [2020-08-18 20:57:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2020-08-18 20:57:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 940 transitions. [2020-08-18 20:57:24,985 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 940 transitions. Word has length 67 [2020-08-18 20:57:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:57:24,985 INFO L479 AbstractCegarLoop]: Abstraction has 777 states and 940 transitions. [2020-08-18 20:57:24,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:57:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 940 transitions. [2020-08-18 20:57:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 20:57:24,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:57:24,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:57:24,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:57:24,988 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:57:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:57:24,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1610113419, now seen corresponding path program 1 times [2020-08-18 20:57:24,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:57:24,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713778832] [2020-08-18 20:57:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:57:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 20:57:25,045 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 20:57:25,045 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 20:57:25,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:57:25,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:57:25 BoogieIcfgContainer [2020-08-18 20:57:25,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:57:25,073 INFO L168 Benchmark]: Toolchain (without parser) took 17673.79 ms. Allocated memory was 141.0 MB in the beginning and 511.2 MB in the end (delta: 370.1 MB). Free memory was 102.9 MB in the beginning and 352.4 MB in the end (delta: -249.5 MB). Peak memory consumption was 120.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:57:25,074 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 20:57:25,075 INFO L168 Benchmark]: CACSL2BoogieTranslator took 649.27 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 102.7 MB in the beginning and 171.7 MB in the end (delta: -69.0 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-08-18 20:57:25,076 INFO L168 Benchmark]: Boogie Preprocessor took 89.83 ms. Allocated memory is still 205.0 MB. Free memory was 171.7 MB in the beginning and 167.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-18 20:57:25,077 INFO L168 Benchmark]: RCFGBuilder took 1110.45 ms. Allocated memory was 205.0 MB in the beginning and 237.0 MB in the end (delta: 32.0 MB). Free memory was 167.7 MB in the beginning and 190.8 MB in the end (delta: -23.2 MB). Peak memory consumption was 80.7 MB. Max. memory is 7.1 GB. [2020-08-18 20:57:25,078 INFO L168 Benchmark]: TraceAbstraction took 15819.63 ms. Allocated memory was 237.0 MB in the beginning and 511.2 MB in the end (delta: 274.2 MB). Free memory was 190.8 MB in the beginning and 352.4 MB in the end (delta: -161.5 MB). Peak memory consumption was 112.7 MB. Max. memory is 7.1 GB. [2020-08-18 20:57:25,081 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 649.27 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 102.7 MB in the beginning and 171.7 MB in the end (delta: -69.0 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 89.83 ms. Allocated memory is still 205.0 MB. Free memory was 171.7 MB in the beginning and 167.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1110.45 ms. Allocated memory was 205.0 MB in the beginning and 237.0 MB in the end (delta: 32.0 MB). Free memory was 167.7 MB in the beginning and 190.8 MB in the end (delta: -23.2 MB). Peak memory consumption was 80.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15819.63 ms. Allocated memory was 237.0 MB in the beginning and 511.2 MB in the end (delta: 274.2 MB). Free memory was 190.8 MB in the beginning and 352.4 MB in the end (delta: -161.5 MB). Peak memory consumption was 112.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 769]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L124] int pumpRunning = 0; [L125] int systemActive = 1; [L568] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L812] int waterLevel = 1; [L813] int methaneLevelCritical = 0; [L915] int cleanupTimeShifts = 4; [L988] int retValue_acc ; [L989] int tmp ; [L993] FCALL select_helpers() [L994] FCALL select_features() [L995] CALL, EXPR valid_product() [L803] int retValue_acc ; [L806] retValue_acc = 1 [L807] return (retValue_acc); [L995] RET, EXPR valid_product() [L995] tmp = valid_product() [L997] COND TRUE \read(tmp) [L999] FCALL setup() [L1000] CALL runTest() [L982] CALL test() [L47] int splverifierCounter ; [L48] int tmp ; [L49] int tmp___0 ; [L50] int tmp___1 ; [L51] int tmp___2 ; [L54] splverifierCounter = 0 [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND TRUE \read(tmp) [L68] CALL waterRise() [L830] COND TRUE waterLevel < 2 [L831] waterLevel = waterLevel + 1 [L68] RET waterRise() [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND TRUE \read(tmp___1) [L96] CALL stopSystem() [L343] COND FALSE !(\read(pumpRunning)) [L350] systemActive = 0 [L96] RET stopSystem() [L103] CALL timeShift() [L132] COND FALSE !(\read(pumpRunning)) [L139] COND FALSE !(\read(systemActive)) [L147] CALL __utac_acc__Specification3_spec__1() [L366] int tmp ; [L367] int tmp___0 ; [L368] int tmp___1 ; [L372] CALL, EXPR isMethaneLevelCritical() [L851] int retValue_acc ; [L854] retValue_acc = methaneLevelCritical [L855] return (retValue_acc); [L372] RET, EXPR isMethaneLevelCritical() [L372] tmp = isMethaneLevelCritical() [L374] COND FALSE !(\read(tmp)) [L378] CALL, EXPR getWaterLevel() [L883] int retValue_acc ; [L886] retValue_acc = waterLevel [L887] return (retValue_acc); [L378] RET, EXPR getWaterLevel() [L378] tmp___0 = getWaterLevel() [L380] COND TRUE tmp___0 == 2 [L382] CALL, EXPR isPumpRunning() [L257] int retValue_acc ; [L260] retValue_acc = pumpRunning [L261] return (retValue_acc); [L382] RET, EXPR isPumpRunning() [L382] tmp___1 = isPumpRunning() [L384] COND FALSE !(\read(tmp___1)) [L388] CALL __automaton_fail() [L769] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 43 procedures, 255 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.7s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 12.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 719 SDtfs, 1300 SDslu, 479 SDs, 0 SdLazy, 2649 SolverSat, 820 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=777occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 5 MinimizatonAttempts, 283 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 360 NumberOfCodeBlocks, 360 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 288 ConstructedInterpolants, 0 QuantifiedInterpolants, 82716 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...