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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product52.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:38:42,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:38:42,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:38:42,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:38:42,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:38:42,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:38:42,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:38:42,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:38:42,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:38:42,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:38:42,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:38:42,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:38:42,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:38:42,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:38:42,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:38:42,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:38:42,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:38:42,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:38:42,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:38:42,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:38:42,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:38:42,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:38:42,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:38:42,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:38:42,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:38:42,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:38:42,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:38:42,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:38:42,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:38:42,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:38:42,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:38:42,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:38:42,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:38:42,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:38:42,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:38:42,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:38:42,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:38:42,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:38:42,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:38:42,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:38:42,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:38:42,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:38:42,074 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:38:42,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:38:42,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:38:42,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:38:42,076 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:38:42,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:38:42,077 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:38:42,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:38:42,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:38:42,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:38:42,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:38:42,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:38:42,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:38:42,078 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:38:42,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:38:42,078 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:38:42,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:38:42,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:38:42,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:38:42,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:38:42,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:38:42,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:38:42,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:38:42,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:38:42,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:38:42,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:38:42,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:38:42,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:38:42,081 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:38:42,360 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:38:42,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:38:42,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:38:42,381 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:38:42,381 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:38:42,382 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product52.cil.c [2019-10-14 23:38:42,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b53791a/a06110ef9cc94a61aa04407c1cece222/FLAG135f9e685 [2019-10-14 23:38:42,983 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:38:42,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product52.cil.c [2019-10-14 23:38:43,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b53791a/a06110ef9cc94a61aa04407c1cece222/FLAG135f9e685 [2019-10-14 23:38:43,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b53791a/a06110ef9cc94a61aa04407c1cece222 [2019-10-14 23:38:43,315 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:38:43,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:38:43,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:38:43,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:38:43,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:38:43,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:38:43" (1/1) ... [2019-10-14 23:38:43,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5072d986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:43, skipping insertion in model container [2019-10-14 23:38:43,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:38:43" (1/1) ... [2019-10-14 23:38:43,330 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:38:43,380 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:38:43,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:38:43,883 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:38:43,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:38:44,010 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:38:44,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:44 WrapperNode [2019-10-14 23:38:44,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:38:44,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:38:44,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:38:44,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:38:44,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:44" (1/1) ... [2019-10-14 23:38:44,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:44" (1/1) ... [2019-10-14 23:38:44,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:44" (1/1) ... [2019-10-14 23:38:44,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:44" (1/1) ... [2019-10-14 23:38:44,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:44" (1/1) ... [2019-10-14 23:38:44,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:44" (1/1) ... [2019-10-14 23:38:44,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:44" (1/1) ... [2019-10-14 23:38:44,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:38:44,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:38:44,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:38:44,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:38:44,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-14 23:38:44,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:38:44,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:38:44,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-14 23:38:44,150 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-14 23:38:44,150 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-14 23:38:44,151 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-14 23:38:44,151 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-14 23:38:44,151 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-14 23:38:44,151 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-14 23:38:44,151 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-14 23:38:44,151 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-14 23:38:44,152 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-14 23:38:44,152 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-14 23:38:44,152 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-14 23:38:44,152 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-14 23:38:44,152 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-14 23:38:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-14 23:38:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-14 23:38:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-14 23:38:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-14 23:38:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-14 23:38:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-14 23:38:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2019-10-14 23:38:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-10-14 23:38:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-14 23:38:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-14 23:38:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-14 23:38:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-14 23:38:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-14 23:38:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-14 23:38:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-14 23:38:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-14 23:38:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-14 23:38:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-14 23:38:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-14 23:38:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:38:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-14 23:38:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-14 23:38:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-14 23:38:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-14 23:38:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-14 23:38:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-14 23:38:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:38:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:38:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-14 23:38:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-14 23:38:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-14 23:38:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-14 23:38:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-14 23:38:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-14 23:38:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-14 23:38:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-14 23:38:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-14 23:38:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:38:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-14 23:38:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-14 23:38:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-14 23:38:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-14 23:38:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-14 23:38:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2019-10-14 23:38:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-10-14 23:38:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-14 23:38:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-14 23:38:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-14 23:38:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-14 23:38:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-14 23:38:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-14 23:38:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-14 23:38:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-14 23:38:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-14 23:38:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-14 23:38:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:38:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:38:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-14 23:38:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:38:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:38:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:38:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:38:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-14 23:38:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:38:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-14 23:38:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-14 23:38:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:38:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-14 23:38:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-14 23:38:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-14 23:38:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-14 23:38:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-14 23:38:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-14 23:38:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-14 23:38:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-14 23:38:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-14 23:38:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:38:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-14 23:38:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-14 23:38:44,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:38:44,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-14 23:38:44,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:38:45,163 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:38:45,163 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 23:38:45,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:38:45 BoogieIcfgContainer [2019-10-14 23:38:45,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:38:45,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:38:45,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:38:45,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:38:45,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:38:43" (1/3) ... [2019-10-14 23:38:45,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2ac9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:38:45, skipping insertion in model container [2019-10-14 23:38:45,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:44" (2/3) ... [2019-10-14 23:38:45,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2ac9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:38:45, skipping insertion in model container [2019-10-14 23:38:45,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:38:45" (3/3) ... [2019-10-14 23:38:45,175 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product52.cil.c [2019-10-14 23:38:45,185 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:38:45,193 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:38:45,205 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:38:45,238 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:38:45,239 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:38:45,239 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:38:45,239 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:38:45,239 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:38:45,240 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:38:45,240 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:38:45,241 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:38:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2019-10-14 23:38:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:38:45,285 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:38:45,286 INFO L380 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] [2019-10-14 23:38:45,288 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:38:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:38:45,295 INFO L82 PathProgramCache]: Analyzing trace with hash -583894042, now seen corresponding path program 1 times [2019-10-14 23:38:45,304 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:38:45,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718646953] [2019-10-14 23:38:45,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:45,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:45,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:38:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:46,029 WARN L191 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:38:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:38:46,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718646953] [2019-10-14 23:38:46,156 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:38:46,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:38:46,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51140443] [2019-10-14 23:38:46,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:38:46,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:38:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:38:46,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:38:46,182 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 3 states. [2019-10-14 23:38:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:38:47,379 INFO L93 Difference]: Finished difference Result 320 states and 417 transitions. [2019-10-14 23:38:47,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:38:47,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-10-14 23:38:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:38:47,407 INFO L225 Difference]: With dead ends: 320 [2019-10-14 23:38:47,407 INFO L226 Difference]: Without dead ends: 173 [2019-10-14 23:38:47,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:38:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-10-14 23:38:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2019-10-14 23:38:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-10-14 23:38:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2019-10-14 23:38:47,521 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 46 [2019-10-14 23:38:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:38:47,522 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2019-10-14 23:38:47,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:38:47,523 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2019-10-14 23:38:47,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:38:47,535 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:38:47,539 INFO L380 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] [2019-10-14 23:38:47,539 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:38:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:38:47,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2008699999, now seen corresponding path program 1 times [2019-10-14 23:38:47,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:38:47,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311508239] [2019-10-14 23:38:47,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:47,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:47,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:38:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:47,945 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:38:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:38:48,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311508239] [2019-10-14 23:38:48,005 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:38:48,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:38:48,006 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660397479] [2019-10-14 23:38:48,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:38:48,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:38:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:38:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:38:48,019 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand 4 states. [2019-10-14 23:38:48,446 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:38:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:38:49,290 INFO L93 Difference]: Finished difference Result 243 states and 296 transitions. [2019-10-14 23:38:49,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:38:49,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-10-14 23:38:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:38:49,294 INFO L225 Difference]: With dead ends: 243 [2019-10-14 23:38:49,294 INFO L226 Difference]: Without dead ends: 157 [2019-10-14 23:38:49,296 INFO L600 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 [2019-10-14 23:38:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-14 23:38:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 129. [2019-10-14 23:38:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-14 23:38:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2019-10-14 23:38:49,333 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 47 [2019-10-14 23:38:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:38:49,334 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2019-10-14 23:38:49,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:38:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2019-10-14 23:38:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:38:49,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:38:49,336 INFO L380 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] [2019-10-14 23:38:49,336 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:38:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:38:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash 940393630, now seen corresponding path program 1 times [2019-10-14 23:38:49,337 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:38:49,337 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925554376] [2019-10-14 23:38:49,337 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:49,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:49,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:38:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:49,668 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:38:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:38:49,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925554376] [2019-10-14 23:38:49,789 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:38:49,789 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 23:38:49,789 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527844764] [2019-10-14 23:38:49,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:38:49,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:38:49,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:38:49,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:38:49,791 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand 8 states. [2019-10-14 23:38:50,277 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:38:50,626 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:38:50,943 WARN L191 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:38:51,195 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:38:52,099 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:38:54,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:38:54,005 INFO L93 Difference]: Finished difference Result 442 states and 547 transitions. [2019-10-14 23:38:54,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:38:54,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2019-10-14 23:38:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:38:54,013 INFO L225 Difference]: With dead ends: 442 [2019-10-14 23:38:54,013 INFO L226 Difference]: Without dead ends: 337 [2019-10-14 23:38:54,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:38:54,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-10-14 23:38:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 272. [2019-10-14 23:38:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2019-10-14 23:38:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 328 transitions. [2019-10-14 23:38:54,092 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 328 transitions. Word has length 52 [2019-10-14 23:38:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:38:54,093 INFO L462 AbstractCegarLoop]: Abstraction has 272 states and 328 transitions. [2019-10-14 23:38:54,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:38:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 328 transitions. [2019-10-14 23:38:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 23:38:54,095 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:38:54,095 INFO L380 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] [2019-10-14 23:38:54,096 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:38:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:38:54,096 INFO L82 PathProgramCache]: Analyzing trace with hash -885199720, now seen corresponding path program 1 times [2019-10-14 23:38:54,096 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:38:54,097 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413809614] [2019-10-14 23:38:54,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:54,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:54,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:38:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:54,450 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:38:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:38:54,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413809614] [2019-10-14 23:38:54,577 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:38:54,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-14 23:38:54,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217603878] [2019-10-14 23:38:54,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:38:54,578 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:38:54,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:38:54,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:38:54,579 INFO L87 Difference]: Start difference. First operand 272 states and 328 transitions. Second operand 12 states. [2019-10-14 23:38:55,168 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:38:55,515 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:38:55,819 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:38:56,073 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:38:56,715 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:38:57,670 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:38:58,092 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:38:58,412 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:38:58,710 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:38:59,029 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:38:59,465 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:38:59,833 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:00,261 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:02,292 INFO L93 Difference]: Finished difference Result 1101 states and 1516 transitions. [2019-10-14 23:39:02,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:39:02,293 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-10-14 23:39:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:02,302 INFO L225 Difference]: With dead ends: 1101 [2019-10-14 23:39:02,302 INFO L226 Difference]: Without dead ends: 853 [2019-10-14 23:39:02,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:39:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2019-10-14 23:39:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 756. [2019-10-14 23:39:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 756 states. [2019-10-14 23:39:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 962 transitions. [2019-10-14 23:39:02,470 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 962 transitions. Word has length 57 [2019-10-14 23:39:02,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:02,471 INFO L462 AbstractCegarLoop]: Abstraction has 756 states and 962 transitions. [2019-10-14 23:39:02,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:39:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 962 transitions. [2019-10-14 23:39:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 23:39:02,475 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:02,475 INFO L380 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] [2019-10-14 23:39:02,475 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:02,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1426922018, now seen corresponding path program 1 times [2019-10-14 23:39:02,476 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:02,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961105442] [2019-10-14 23:39:02,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:02,477 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:02,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:02,847 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:39:02,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961105442] [2019-10-14 23:39:02,913 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:39:02,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:39:02,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422860889] [2019-10-14 23:39:02,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:39:02,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:02,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:39:02,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:39:02,914 INFO L87 Difference]: Start difference. First operand 756 states and 962 transitions. Second operand 6 states. [2019-10-14 23:39:03,311 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:05,348 INFO L93 Difference]: Finished difference Result 1819 states and 2481 transitions. [2019-10-14 23:39:05,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:39:05,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2019-10-14 23:39:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:05,357 INFO L225 Difference]: With dead ends: 1819 [2019-10-14 23:39:05,357 INFO L226 Difference]: Without dead ends: 1087 [2019-10-14 23:39:05,360 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:39:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2019-10-14 23:39:05,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 996. [2019-10-14 23:39:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 996 states. [2019-10-14 23:39:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1256 transitions. [2019-10-14 23:39:05,566 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1256 transitions. Word has length 61 [2019-10-14 23:39:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:05,567 INFO L462 AbstractCegarLoop]: Abstraction has 996 states and 1256 transitions. [2019-10-14 23:39:05,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:39:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1256 transitions. [2019-10-14 23:39:05,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 23:39:05,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:05,570 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:39:05,571 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:05,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:05,571 INFO L82 PathProgramCache]: Analyzing trace with hash -50759536, now seen corresponding path program 1 times [2019-10-14 23:39:05,571 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:05,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692854821] [2019-10-14 23:39:05,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:05,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:05,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:05,931 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-14 23:39:06,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692854821] [2019-10-14 23:39:06,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200560685] [2019-10-14 23:39:06,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:06,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:39:06,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:39:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:39:06,444 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:39:06,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-14 23:39:06,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820718279] [2019-10-14 23:39:06,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:39:06,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:06,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:39:06,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:39:06,447 INFO L87 Difference]: Start difference. First operand 996 states and 1256 transitions. Second operand 15 states. [2019-10-14 23:39:07,297 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:08,104 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:08,942 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:10,203 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:39:10,595 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:12,282 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:12,670 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:13,123 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:14,404 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:14,730 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:15,022 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:15,326 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:15,628 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:15,991 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:16,312 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:16,608 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:16,904 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:39:17,353 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:18,008 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:18,781 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:19,093 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:19,387 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:19,947 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:20,257 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:20,549 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:20,826 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:21,156 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:21,823 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-10-14 23:39:22,178 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-10-14 23:39:22,474 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-10-14 23:39:22,810 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:23,100 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 190