/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product36.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:14:17,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:14:17,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:14:17,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:14:17,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:14:17,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:14:17,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:14:17,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:14:17,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:14:17,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:14:17,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:14:17,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:14:17,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:14:17,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:14:17,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:14:17,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:14:17,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:14:17,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:14:17,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:14:17,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:14:17,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:14:17,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:14:17,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:14:17,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:14:17,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 15:14:17,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 15:14:17,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 15:14:17,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 15:14:17,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 15:14:17,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 15:14:17,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 15:14:17,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 15:14:17,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 15:14:17,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 15:14:17,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 15:14:17,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 15:14:17,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 15:14:17,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 15:14:17,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:14:17,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:14:17,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:14:17,162 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 15:14:17,184 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:14:17,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:14:17,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:14:17,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:14:17,186 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:14:17,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:14:17,186 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:14:17,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:14:17,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:14:17,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:14:17,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:14:17,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:14:17,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:14:17,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:14:17,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:14:17,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:14:17,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:14:17,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:14:17,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:14:17,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:14:17,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:14:17,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:14:17,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:14:17,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:14:17,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:14:17,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:14:17,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:14:17,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:14:17,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:14:17,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-18 15:14:17,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:14:17,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:14:17,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:14:17,470 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:14:17,470 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:14:17,471 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product36.cil.c [2020-08-18 15:14:17,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b06e991d3/aea082b184fb462d98c7639f4d66536d/FLAG1fda74b8e [2020-08-18 15:14:18,120 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:14:18,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product36.cil.c [2020-08-18 15:14:18,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b06e991d3/aea082b184fb462d98c7639f4d66536d/FLAG1fda74b8e [2020-08-18 15:14:18,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b06e991d3/aea082b184fb462d98c7639f4d66536d [2020-08-18 15:14:18,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:14:18,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:14:18,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:14:18,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:14:18,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:14:18,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:14:18" (1/1) ... [2020-08-18 15:14:18,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71155234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:18, skipping insertion in model container [2020-08-18 15:14:18,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:14:18" (1/1) ... [2020-08-18 15:14:18,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:14:18,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:14:18,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:14:18,944 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:14:19,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:14:19,095 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:14:19,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:19 WrapperNode [2020-08-18 15:14:19,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:14:19,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:14:19,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:14:19,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:14:19,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:19" (1/1) ... [2020-08-18 15:14:19,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:19" (1/1) ... [2020-08-18 15:14:19,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:19" (1/1) ... [2020-08-18 15:14:19,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:19" (1/1) ... [2020-08-18 15:14:19,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:19" (1/1) ... [2020-08-18 15:14:19,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:19" (1/1) ... [2020-08-18 15:14:19,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:19" (1/1) ... [2020-08-18 15:14:19,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:14:19,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:14:19,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:14:19,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:14:19,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:19" (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 15:14:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:14:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:14:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 15:14:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 15:14:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 15:14:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 15:14:19,286 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 15:14:19,286 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 15:14:19,286 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 15:14:19,286 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 15:14:19,287 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 15:14:19,287 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 15:14:19,287 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 15:14:19,287 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 15:14:19,287 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 15:14:19,287 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 15:14:19,288 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 15:14:19,288 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 15:14:19,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 15:14:19,288 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 15:14:19,288 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 15:14:19,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 15:14:19,288 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 15:14:19,289 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 15:14:19,289 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 15:14:19,289 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 15:14:19,289 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 15:14:19,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 15:14:19,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 15:14:19,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 15:14:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 15:14:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 15:14:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 15:14:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 15:14:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 15:14:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 15:14:19,291 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 15:14:19,291 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 15:14:19,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:14:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:14:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:14:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 15:14:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 15:14:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 15:14:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 15:14:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 15:14:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 15:14:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 15:14:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 15:14:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 15:14:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 15:14:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 15:14:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 15:14:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 15:14:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 15:14:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 15:14:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 15:14:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 15:14:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 15:14:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 15:14:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 15:14:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 15:14:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 15:14:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 15:14:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 15:14:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 15:14:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 15:14:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 15:14:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 15:14:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 15:14:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 15:14:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 15:14:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 15:14:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 15:14:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 15:14:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 15:14:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 15:14:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 15:14:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 15:14:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 15:14:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 15:14:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 15:14:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 15:14:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 15:14:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 15:14:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 15:14:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 15:14:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 15:14:19,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:14:19,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:14:19,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 15:14:19,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:14:22,410 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:14:22,411 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 15:14:22,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:14:22 BoogieIcfgContainer [2020-08-18 15:14:22,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:14:22,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:14:22,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:14:22,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:14:22,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:14:18" (1/3) ... [2020-08-18 15:14:22,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bad2c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:14:22, skipping insertion in model container [2020-08-18 15:14:22,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:14:19" (2/3) ... [2020-08-18 15:14:22,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bad2c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:14:22, skipping insertion in model container [2020-08-18 15:14:22,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:14:22" (3/3) ... [2020-08-18 15:14:22,424 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product36.cil.c [2020-08-18 15:14:22,435 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:14:22,443 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:14:22,457 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:14:22,481 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:14:22,481 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:14:22,481 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:14:22,481 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:14:22,482 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:14:22,482 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:14:22,482 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:14:22,482 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:14:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-08-18 15:14:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 15:14:22,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:14:22,513 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 15:14:22,514 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:14:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:14:22,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1779053206, now seen corresponding path program 1 times [2020-08-18 15:14:22,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:14:22,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116906338] [2020-08-18 15:14:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:14:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:23,180 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 15:14:23,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:14:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:23,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:14:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:23,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:14:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:23,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:14:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:23,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 15:14:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:23,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 15:14:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 15:14:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:23,272 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 15:14:23,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116906338] [2020-08-18 15:14:23,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:14:23,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:14:23,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195958752] [2020-08-18 15:14:23,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:14:23,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:14:23,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:14:23,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:14:23,317 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 3 states. [2020-08-18 15:14:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:14:24,501 INFO L93 Difference]: Finished difference Result 278 states and 364 transitions. [2020-08-18 15:14:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:14:24,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 15:14:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:14:24,518 INFO L225 Difference]: With dead ends: 278 [2020-08-18 15:14:24,518 INFO L226 Difference]: Without dead ends: 151 [2020-08-18 15:14:24,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:14:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-18 15:14:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 118. [2020-08-18 15:14:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-18 15:14:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2020-08-18 15:14:24,607 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 46 [2020-08-18 15:14:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:14:24,608 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2020-08-18 15:14:24,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:14:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2020-08-18 15:14:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 15:14:24,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:14:24,611 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 15:14:24,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:14:24,612 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:14:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:14:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash 83171531, now seen corresponding path program 1 times [2020-08-18 15:14:24,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:14:24,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35185333] [2020-08-18 15:14:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:14:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:25,005 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 15:14:25,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:14:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:25,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:14:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:25,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:14:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:25,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:14:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:25,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 15:14:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:25,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 15:14:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:25,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 15:14:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:25,048 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 15:14:25,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35185333] [2020-08-18 15:14:25,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:14:25,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:14:25,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478221351] [2020-08-18 15:14:25,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:14:25,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:14:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:14:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:14:25,052 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand 4 states. [2020-08-18 15:14:25,520 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:14:26,215 INFO L93 Difference]: Finished difference Result 198 states and 241 transitions. [2020-08-18 15:14:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:14:26,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 15:14:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:14:26,220 INFO L225 Difference]: With dead ends: 198 [2020-08-18 15:14:26,221 INFO L226 Difference]: Without dead ends: 135 [2020-08-18 15:14:26,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:14:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-18 15:14:26,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2020-08-18 15:14:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-18 15:14:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-08-18 15:14:26,271 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 47 [2020-08-18 15:14:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:14:26,272 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-08-18 15:14:26,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 15:14:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-08-18 15:14:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 15:14:26,274 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:14:26,274 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 15:14:26,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:14:26,275 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:14:26,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:14:26,275 INFO L82 PathProgramCache]: Analyzing trace with hash -532729622, now seen corresponding path program 1 times [2020-08-18 15:14:26,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:14:26,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859094470] [2020-08-18 15:14:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:14:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:26,594 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 15:14:26,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:14:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:26,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:14:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:26,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:14:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:26,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:14:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:26,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 15:14:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:26,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 15:14:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:26,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 15:14:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:26,679 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 15:14:26,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859094470] [2020-08-18 15:14:26,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:14:26,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 15:14:26,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909806206] [2020-08-18 15:14:26,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:14:26,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:14:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:14:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:14:26,682 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 8 states. [2020-08-18 15:14:27,086 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 15:14:27,386 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 15:14:27,637 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 15:14:27,898 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 15:14:28,634 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:14:30,071 INFO L93 Difference]: Finished difference Result 378 states and 466 transitions. [2020-08-18 15:14:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:14:30,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 15:14:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:14:30,080 INFO L225 Difference]: With dead ends: 378 [2020-08-18 15:14:30,080 INFO L226 Difference]: Without dead ends: 293 [2020-08-18 15:14:30,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:14:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-08-18 15:14:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 220. [2020-08-18 15:14:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-08-18 15:14:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 262 transitions. [2020-08-18 15:14:30,148 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 262 transitions. Word has length 52 [2020-08-18 15:14:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:14:30,149 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 262 transitions. [2020-08-18 15:14:30,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:14:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 262 transitions. [2020-08-18 15:14:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 15:14:30,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:14:30,152 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 15:14:30,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:14:30,152 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:14:30,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:14:30,152 INFO L82 PathProgramCache]: Analyzing trace with hash 692647563, now seen corresponding path program 1 times [2020-08-18 15:14:30,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:14:30,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417418057] [2020-08-18 15:14:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:14:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:30,440 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 15:14:30,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:14:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:30,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:14:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:30,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:14:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:30,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:14:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:30,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 15:14:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:30,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 15:14:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:30,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 15:14:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:30,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 15:14:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:30,543 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 15:14:30,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417418057] [2020-08-18 15:14:30,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:14:30,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 15:14:30,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918492715] [2020-08-18 15:14:30,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:14:30,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:14:30,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:14:30,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:14:30,545 INFO L87 Difference]: Start difference. First operand 220 states and 262 transitions. Second operand 8 states. [2020-08-18 15:14:30,943 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 15:14:32,025 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 15:14:32,334 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 15:14:32,642 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 15:14:32,869 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 15:14:33,199 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:14:33,924 INFO L93 Difference]: Finished difference Result 713 states and 925 transitions. [2020-08-18 15:14:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 15:14:33,924 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 15:14:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:14:33,930 INFO L225 Difference]: With dead ends: 713 [2020-08-18 15:14:33,930 INFO L226 Difference]: Without dead ends: 517 [2020-08-18 15:14:33,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 15:14:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-08-18 15:14:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 395. [2020-08-18 15:14:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-08-18 15:14:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 474 transitions. [2020-08-18 15:14:34,031 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 474 transitions. Word has length 57 [2020-08-18 15:14:34,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:14:34,032 INFO L479 AbstractCegarLoop]: Abstraction has 395 states and 474 transitions. [2020-08-18 15:14:34,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:14:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 474 transitions. [2020-08-18 15:14:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 15:14:34,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:14:34,035 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 15:14:34,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:14:34,036 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:14:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:14:34,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1256704497, now seen corresponding path program 1 times [2020-08-18 15:14:34,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:14:34,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015278066] [2020-08-18 15:14:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:14:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:34,320 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 15:14:34,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:14:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:34,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:14:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:34,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:14:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:34,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:14:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:34,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 15:14:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:34,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 15:14:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:34,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 15:14:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:34,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 15:14:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:34,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 15:14:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:34,428 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 15:14:34,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015278066] [2020-08-18 15:14:34,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:14:34,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 15:14:34,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430871681] [2020-08-18 15:14:34,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:14:34,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:14:34,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:14:34,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:14:34,433 INFO L87 Difference]: Start difference. First operand 395 states and 474 transitions. Second operand 9 states. [2020-08-18 15:14:34,889 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 15:14:35,936 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 15:14:36,232 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 15:14:36,476 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 15:14:37,010 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 15:14:37,295 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:14:38,137 INFO L93 Difference]: Finished difference Result 1150 states and 1524 transitions. [2020-08-18 15:14:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 15:14:38,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 15:14:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:14:38,152 INFO L225 Difference]: With dead ends: 1150 [2020-08-18 15:14:38,152 INFO L226 Difference]: Without dead ends: 779 [2020-08-18 15:14:38,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 15:14:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-08-18 15:14:38,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 615. [2020-08-18 15:14:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2020-08-18 15:14:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 751 transitions. [2020-08-18 15:14:38,283 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 751 transitions. Word has length 61 [2020-08-18 15:14:38,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:14:38,284 INFO L479 AbstractCegarLoop]: Abstraction has 615 states and 751 transitions. [2020-08-18 15:14:38,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:14:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 751 transitions. [2020-08-18 15:14:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 15:14:38,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:14:38,287 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] [2020-08-18 15:14:38,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:14:38,287 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:14:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:14:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash 148740965, now seen corresponding path program 1 times [2020-08-18 15:14:38,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:14:38,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706102464] [2020-08-18 15:14:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:14:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,667 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 15:14:38,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:14:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:14:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:14:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:14:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 15:14:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 15:14:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 15:14:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:14:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:14:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 15:14:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 15:14:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 15:14:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:38,812 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 15:14:38,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706102464] [2020-08-18 15:14:38,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:14:38,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 15:14:38,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263117472] [2020-08-18 15:14:38,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:14:38,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:14:38,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:14:38,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:14:38,817 INFO L87 Difference]: Start difference. First operand 615 states and 751 transitions. Second operand 9 states. [2020-08-18 15:14:39,356 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 15:14:40,266 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:40,515 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 15:14:40,765 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:41,034 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:14:42,628 INFO L93 Difference]: Finished difference Result 2147 states and 3042 transitions. [2020-08-18 15:14:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 15:14:42,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-08-18 15:14:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:14:42,647 INFO L225 Difference]: With dead ends: 2147 [2020-08-18 15:14:42,648 INFO L226 Difference]: Without dead ends: 1556 [2020-08-18 15:14:42,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-18 15:14:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2020-08-18 15:14:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1159. [2020-08-18 15:14:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1159 states. [2020-08-18 15:14:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1412 transitions. [2020-08-18 15:14:42,939 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1412 transitions. Word has length 79 [2020-08-18 15:14:42,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:14:42,940 INFO L479 AbstractCegarLoop]: Abstraction has 1159 states and 1412 transitions. [2020-08-18 15:14:42,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:14:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1412 transitions. [2020-08-18 15:14:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 15:14:42,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:14:42,947 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] [2020-08-18 15:14:42,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:14:42,947 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:14:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:14:42,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2136122490, now seen corresponding path program 1 times [2020-08-18 15:14:42,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:14:42,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017632411] [2020-08-18 15:14:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:14:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,192 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 15:14:43,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:14:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:14:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:14:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:14:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 15:14:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 15:14:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 15:14:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:14:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:14:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 15:14:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 15:14:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 15:14:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:43,291 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 15:14:43,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017632411] [2020-08-18 15:14:43,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:14:43,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 15:14:43,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431430154] [2020-08-18 15:14:43,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:14:43,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:14:43,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:14:43,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:14:43,293 INFO L87 Difference]: Start difference. First operand 1159 states and 1412 transitions. Second operand 9 states. [2020-08-18 15:14:44,358 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:44,655 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 15:14:45,008 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:45,249 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:46,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:14:46,275 INFO L93 Difference]: Finished difference Result 2704 states and 3585 transitions. [2020-08-18 15:14:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:14:46,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-08-18 15:14:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:14:46,291 INFO L225 Difference]: With dead ends: 2704 [2020-08-18 15:14:46,291 INFO L226 Difference]: Without dead ends: 1569 [2020-08-18 15:14:46,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:14:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-08-18 15:14:46,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1199. [2020-08-18 15:14:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2020-08-18 15:14:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1452 transitions. [2020-08-18 15:14:46,527 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1452 transitions. Word has length 79 [2020-08-18 15:14:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:14:46,527 INFO L479 AbstractCegarLoop]: Abstraction has 1199 states and 1452 transitions. [2020-08-18 15:14:46,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:14:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1452 transitions. [2020-08-18 15:14:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 15:14:46,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:14:46,531 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] [2020-08-18 15:14:46,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:14:46,531 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:14:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:14:46,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1649371716, now seen corresponding path program 1 times [2020-08-18 15:14:46,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:14:46,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411949800] [2020-08-18 15:14:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:14:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:46,877 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 15:14:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:14:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:46,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 15:14:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:46,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:14:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:46,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 15:14:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:46,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 15:14:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:46,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 15:14:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:46,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 15:14:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:46,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:14:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:47,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 15:14:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:47,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 15:14:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:47,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 15:14:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:47,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 15:14:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:14:47,049 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 15:14:47,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411949800] [2020-08-18 15:14:47,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:14:47,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 15:14:47,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080808555] [2020-08-18 15:14:47,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:14:47,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:14:47,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:14:47,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:14:47,056 INFO L87 Difference]: Start difference. First operand 1199 states and 1452 transitions. Second operand 11 states. [2020-08-18 15:14:47,869 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:48,125 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:48,348 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:49,062 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:49,332 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:49,594 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 15:14:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:14:50,549 INFO L93 Difference]: Finished difference Result 2398 states and 3135 transitions. [2020-08-18 15:14:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 15:14:50,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-08-18 15:14:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:14:50,560 INFO L225 Difference]: With dead ends: 2398 [2020-08-18 15:14:50,560 INFO L226 Difference]: Without dead ends: 1223 [2020-08-18 15:14:50,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 15:14:50,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2020-08-18 15:14:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 973. [2020-08-18 15:14:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2020-08-18 15:14:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1148 transitions. [2020-08-18 15:14:50,731 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1148 transitions. Word has length 79 [2020-08-18 15:14:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:14:50,732 INFO L479 AbstractCegarLoop]: Abstraction has 973 states and 1148 transitions. [2020-08-18 15:14:50,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:14:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1148 transitions. [2020-08-18 15:14:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 15:14:50,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:14:50,734 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 15:14:50,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:14:50,734 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:14:50,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:14:50,734 INFO L82 PathProgramCache]: Analyzing trace with hash -453271351, now seen corresponding path program 1 times [2020-08-18 15:14:50,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:14:50,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741888032] [2020-08-18 15:14:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:14:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 15:14:50,786 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 15:14:50,787 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 15:14:50,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:14:50,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:14:50 BoogieIcfgContainer [2020-08-18 15:14:50,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:14:50,817 INFO L168 Benchmark]: Toolchain (without parser) took 32410.48 ms. Allocated memory was 139.5 MB in the beginning and 630.7 MB in the end (delta: 491.3 MB). Free memory was 102.0 MB in the beginning and 301.9 MB in the end (delta: -200.0 MB). Peak memory consumption was 291.3 MB. Max. memory is 7.1 GB. [2020-08-18 15:14:50,818 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-18 15:14:50,819 INFO L168 Benchmark]: CACSL2BoogieTranslator took 687.73 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.6 MB in the beginning and 172.1 MB in the end (delta: -70.6 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2020-08-18 15:14:50,820 INFO L168 Benchmark]: Boogie Preprocessor took 119.80 ms. Allocated memory is still 202.9 MB. Free memory was 172.1 MB in the beginning and 168.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:14:50,821 INFO L168 Benchmark]: RCFGBuilder took 3197.24 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 168.1 MB in the beginning and 201.2 MB in the end (delta: -33.1 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2020-08-18 15:14:50,822 INFO L168 Benchmark]: TraceAbstraction took 28398.66 ms. Allocated memory was 235.9 MB in the beginning and 630.7 MB in the end (delta: 394.8 MB). Free memory was 199.5 MB in the beginning and 301.9 MB in the end (delta: -102.5 MB). Peak memory consumption was 292.3 MB. Max. memory is 7.1 GB. [2020-08-18 15:14:50,825 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 687.73 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.6 MB in the beginning and 172.1 MB in the end (delta: -70.6 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.80 ms. Allocated memory is still 202.9 MB. Free memory was 172.1 MB in the beginning and 168.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3197.24 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 168.1 MB in the beginning and 201.2 MB in the end (delta: -33.1 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28398.66 ms. Allocated memory was 235.9 MB in the beginning and 630.7 MB in the end (delta: 394.8 MB). Free memory was 199.5 MB in the beginning and 301.9 MB in the end (delta: -102.5 MB). Peak memory consumption was 292.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 44]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L60] int pumpRunning = 0; [L61] int systemActive = 1; [L239] int waterLevel = 1; [L240] int methaneLevelCritical = 0; [L610] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L833] int cleanupTimeShifts = 4; [L906] int retValue_acc ; [L907] int tmp ; [L911] FCALL select_helpers() [L912] FCALL select_features() [L913] CALL, EXPR valid_product() [L432] int retValue_acc ; [L435] retValue_acc = 1 [L436] return (retValue_acc); [L913] RET, EXPR valid_product() [L913] tmp = valid_product() [L915] COND TRUE \read(tmp) [L917] FCALL setup() [L918] CALL runTest() [L900] CALL test() [L335] int splverifierCounter ; [L336] int tmp ; [L337] int tmp___0 ; [L338] int tmp___1 ; [L339] int tmp___2 ; [L342] splverifierCounter = 0 [L344] COND TRUE 1 [L346] COND TRUE splverifierCounter < 4 [L352] tmp = __VERIFIER_nondet_int() [L354] COND TRUE \read(tmp) [L356] CALL waterRise() [L257] COND TRUE waterLevel < 2 [L258] waterLevel = waterLevel + 1 [L356] RET waterRise() [L362] tmp___0 = __VERIFIER_nondet_int() [L364] COND TRUE \read(tmp___0) [L366] CALL changeMethaneLevel() [L269] COND FALSE !(\read(methaneLevelCritical)) [L272] methaneLevelCritical = 1 [L366] RET changeMethaneLevel() [L372] tmp___2 = __VERIFIER_nondet_int() [L374] COND FALSE !(\read(tmp___2)) [L380] tmp___1 = __VERIFIER_nondet_int() [L382] COND FALSE !(\read(tmp___1)) [L391] CALL timeShift() [L68] COND FALSE !(\read(pumpRunning)) [L75] COND TRUE \read(systemActive) [L77] CALL processEnvironment() [L97] int tmp ; [L100] COND TRUE ! pumpRunning [L102] CALL, EXPR isHighWaterLevel() [L194] int retValue_acc ; [L195] int tmp ; [L196] int tmp___0 ; [L200] CALL, EXPR isHighWaterSensorDry() [L319] int retValue_acc ; [L322] COND FALSE !(waterLevel < 2) [L326] retValue_acc = 0 [L327] return (retValue_acc); [L200] RET, EXPR isHighWaterSensorDry() [L200] tmp = isHighWaterSensorDry() [L202] COND FALSE !(\read(tmp)) [L205] tmp___0 = 1 [L207] retValue_acc = tmp___0 [L208] return (retValue_acc); [L102] RET, EXPR isHighWaterLevel() [L102] tmp = isHighWaterLevel() [L104] COND TRUE \read(tmp) [L106] CALL activatePump() [L125] pumpRunning = 1 [L106] RET activatePump() [L77] RET processEnvironment() [L83] CALL __utac_acc__Specification1_spec__1() [L808] int tmp ; [L809] int tmp___0 ; [L813] CALL, EXPR isMethaneLevelCritical() [L278] int retValue_acc ; [L281] retValue_acc = methaneLevelCritical [L282] return (retValue_acc); [L813] RET, EXPR isMethaneLevelCritical() [L813] tmp = isMethaneLevelCritical() [L815] COND TRUE \read(tmp) [L817] CALL, EXPR isPumpRunning() [L149] int retValue_acc ; [L152] retValue_acc = pumpRunning [L153] return (retValue_acc); [L817] RET, EXPR isPumpRunning() [L817] tmp___0 = isPumpRunning() [L819] COND TRUE \read(tmp___0) [L821] CALL __automaton_fail() [L44] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 39 procedures, 225 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.3s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 23.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 837 SDtfs, 1659 SDslu, 1113 SDs, 0 SdLazy, 4903 SolverSat, 1141 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1199occurred in iteration=7, 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, 1435 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 583 NumberOfCodeBlocks, 583 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 492 ConstructedInterpolants, 0 QuantifiedInterpolants, 143100 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...