/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:45:16,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:45:16,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:45:16,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:45:16,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:45:16,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:45:16,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:45:16,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:45:16,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:45:16,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:45:16,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:45:16,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:45:16,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:45:16,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:45:16,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:45:17,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:45:17,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:45:17,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:45:17,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:45:17,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:45:17,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:45:17,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:45:17,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:45:17,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:45:17,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 06:45:17,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 06:45:17,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 06:45:17,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 06:45:17,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 06:45:17,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 06:45:17,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:45:17,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:45:17,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:45:17,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:45:17,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:45:17,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:45:17,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:45:17,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:45:17,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:45:17,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:45:17,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:45:17,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:45:17,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:45:17,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:45:17,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:45:17,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:45:17,148 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:45:17,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:45:17,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:45:17,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:45:17,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:45:17,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:45:17,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:45:17,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:45:17,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:45:17,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:45:17,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:45:17,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:45:17,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:45:17,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:45:17,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:45:17,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:45:17,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:45:17,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:45:17,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:45:17,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:45:17,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:45:17,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:45:17,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:45:17,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:45:17,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:45:17,700 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:45:17,701 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:45:17,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/ludcmp.c [2020-12-23 06:45:17,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8f3d21fec/7e30226276114da4bf695bdd78773390/FLAG836b607be [2020-12-23 06:45:18,649 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:45:18,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c [2020-12-23 06:45:18,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8f3d21fec/7e30226276114da4bf695bdd78773390/FLAG836b607be [2020-12-23 06:45:18,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8f3d21fec/7e30226276114da4bf695bdd78773390 [2020-12-23 06:45:18,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:45:18,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:45:18,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:45:18,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:45:19,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:45:19,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:45:18" (1/1) ... [2020-12-23 06:45:19,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4220b9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19, skipping insertion in model container [2020-12-23 06:45:19,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:45:18" (1/1) ... [2020-12-23 06:45:19,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:45:19,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:45:19,246 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~eps~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~w~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~chkerr~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: lhs: VariableLHS[~w~1,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~j~1,]]],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: lhs: VariableLHS[~w~1,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~1,]]]],[IdentifierExpression[~j~1,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~y~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~w~1,] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~y~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,GLOBAL],[IdentifierExpression[~n,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~w~1,] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,GLOBAL],[IdentifierExpression[~i~1,]]] [2020-12-23 06:45:19,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:45:19,370 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:45:19,386 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~eps~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~w~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[400],IdentifierExpression[~i~0,]]],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~chkerr~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: lhs: VariableLHS[~w~1,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[400],IdentifierExpression[~j~1,]]],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: lhs: VariableLHS[~w~1,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[400],BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~1,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~j~1,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#y~0,],base],StructAccessExpression[IdentifierExpression[~#y~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~w~1,] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#y~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#y~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~n,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~w~1,] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~1,]]]]] [2020-12-23 06:45:19,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:45:19,445 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:45:19,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19 WrapperNode [2020-12-23 06:45:19,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:45:19,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:45:19,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:45:19,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:45:19,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (1/1) ... [2020-12-23 06:45:19,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (1/1) ... [2020-12-23 06:45:19,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:45:19,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:45:19,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:45:19,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:45:19,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (1/1) ... [2020-12-23 06:45:19,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (1/1) ... [2020-12-23 06:45:19,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (1/1) ... [2020-12-23 06:45:19,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (1/1) ... [2020-12-23 06:45:19,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (1/1) ... [2020-12-23 06:45:19,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (1/1) ... [2020-12-23 06:45:19,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (1/1) ... [2020-12-23 06:45:19,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:45:19,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:45:19,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:45:19,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:45:19,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:45:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:45:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:45:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-23 06:45:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-23 06:45:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:45:19,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:45:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:45:20,527 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:45:20,528 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-23 06:45:20,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:45:20 BoogieIcfgContainer [2020-12-23 06:45:20,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:45:20,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:45:20,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:45:20,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:45:20,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:45:18" (1/3) ... [2020-12-23 06:45:20,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2d59b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:45:20, skipping insertion in model container [2020-12-23 06:45:20,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:45:19" (2/3) ... [2020-12-23 06:45:20,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2d59b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:45:20, skipping insertion in model container [2020-12-23 06:45:20,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:45:20" (3/3) ... [2020-12-23 06:45:20,548 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2020-12-23 06:45:20,558 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:45:20,566 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:45:20,594 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:45:20,629 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:45:20,629 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:45:20,629 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:45:20,630 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:45:20,630 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:45:20,630 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:45:20,630 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:45:20,630 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:45:20,650 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-23 06:45:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:45:20,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:20,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:20,660 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2020-12-23 06:45:20,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:20,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759502099] [2020-12-23 06:45:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:20,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759502099] [2020-12-23 06:45:20,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:45:20,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:45:20,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439782790] [2020-12-23 06:45:20,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:45:20,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:20,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:45:20,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:45:20,993 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2020-12-23 06:45:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:21,092 INFO L93 Difference]: Finished difference Result 102 states and 159 transitions. [2020-12-23 06:45:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:45:21,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 06:45:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:21,108 INFO L225 Difference]: With dead ends: 102 [2020-12-23 06:45:21,109 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:45:21,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:45:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:45:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2020-12-23 06:45:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:45:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 06:45:21,162 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2020-12-23 06:45:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:21,162 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 06:45:21,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:45:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 06:45:21,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:45:21,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:21,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:21,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:45:21,164 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:21,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1948892579, now seen corresponding path program 1 times [2020-12-23 06:45:21,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:21,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081514401] [2020-12-23 06:45:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:21,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081514401] [2020-12-23 06:45:21,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444004182] [2020-12-23 06:45:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:45:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:21,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:45:21,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:21,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:21,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-23 06:45:21,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811080185] [2020-12-23 06:45:21,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:45:21,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:21,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:45:21,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:45:21,616 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2020-12-23 06:45:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:21,695 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-23 06:45:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:45:21,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-23 06:45:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:21,697 INFO L225 Difference]: With dead ends: 33 [2020-12-23 06:45:21,697 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:45:21,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:45:21,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:45:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-12-23 06:45:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:45:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-23 06:45:21,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2020-12-23 06:45:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:21,706 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-23 06:45:21,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:45:21,707 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-23 06:45:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:45:21,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:21,708 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:21,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:45:21,923 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash 116728450, now seen corresponding path program 2 times [2020-12-23 06:45:21,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:21,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151928156] [2020-12-23 06:45:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:22,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151928156] [2020-12-23 06:45:22,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487887088] [2020-12-23 06:45:22,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:22,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:45:22,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:45:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:45:22,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:22,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:45:22,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-23 06:45:22,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659819339] [2020-12-23 06:45:22,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:45:22,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:22,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:45:22,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:45:22,278 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 5 states. [2020-12-23 06:45:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:22,339 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-12-23 06:45:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:45:22,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 06:45:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:22,341 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:45:22,342 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:45:22,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:45:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:45:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-23 06:45:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:45:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-23 06:45:22,357 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2020-12-23 06:45:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:22,359 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-23 06:45:22,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:45:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-23 06:45:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:45:22,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:22,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:22,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:22,577 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:22,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2020-12-23 06:45:22,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:22,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179594590] [2020-12-23 06:45:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:22,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179594590] [2020-12-23 06:45:22,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636288115] [2020-12-23 06:45:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:22,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:45:22,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:22,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:22,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 06:45:22,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254724009] [2020-12-23 06:45:22,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:45:22,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:22,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:45:22,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:45:22,820 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-23 06:45:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:22,876 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-12-23 06:45:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:45:22,877 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 06:45:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:22,878 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:45:22,879 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:45:22,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:45:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:45:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-12-23 06:45:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:45:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-12-23 06:45:22,887 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 15 [2020-12-23 06:45:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:22,887 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-12-23 06:45:22,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:45:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-12-23 06:45:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:45:22,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:22,889 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:23,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:23,104 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:23,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1388100565, now seen corresponding path program 2 times [2020-12-23 06:45:23,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:23,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60038020] [2020-12-23 06:45:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:23,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60038020] [2020-12-23 06:45:23,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532326439] [2020-12-23 06:45:23,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:23,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:45:23,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:45:23,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:45:23,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:23,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:23,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-23 06:45:23,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791335202] [2020-12-23 06:45:23,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:45:23,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:23,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:45:23,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:45:23,351 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 11 states. [2020-12-23 06:45:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:23,430 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2020-12-23 06:45:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:45:23,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-12-23 06:45:23,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:23,432 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:45:23,432 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:45:23,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:45:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:45:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-12-23 06:45:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 06:45:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-12-23 06:45:23,441 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 19 [2020-12-23 06:45:23,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:23,441 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-12-23 06:45:23,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:45:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-12-23 06:45:23,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:45:23,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:23,443 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:23,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:23,658 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:23,659 INFO L82 PathProgramCache]: Analyzing trace with hash 756876242, now seen corresponding path program 3 times [2020-12-23 06:45:23,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:23,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13829388] [2020-12-23 06:45:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:23,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13829388] [2020-12-23 06:45:23,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401072614] [2020-12-23 06:45:23,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:23,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 06:45:23,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:45:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:45:23,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:24,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:24,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-23 06:45:24,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366107878] [2020-12-23 06:45:24,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:45:24,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:24,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:45:24,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:45:24,124 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 13 states. [2020-12-23 06:45:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:24,197 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-12-23 06:45:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:45:24,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-12-23 06:45:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:24,199 INFO L225 Difference]: With dead ends: 82 [2020-12-23 06:45:24,199 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 06:45:24,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:45:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 06:45:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-12-23 06:45:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 06:45:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-23 06:45:24,208 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 23 [2020-12-23 06:45:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:24,208 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-23 06:45:24,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:45:24,209 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-23 06:45:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:45:24,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:24,210 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:24,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:45:24,424 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1523542023, now seen corresponding path program 4 times [2020-12-23 06:45:24,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:24,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603911994] [2020-12-23 06:45:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:45:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:24,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603911994] [2020-12-23 06:45:24,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827260493] [2020-12-23 06:45:24,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:24,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:45:24,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:45:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:45:24,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:45:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:45:24,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:45:24,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 06:45:24,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817210492] [2020-12-23 06:45:24,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:45:24,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:45:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:45:24,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:45:24,760 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 15 states. [2020-12-23 06:45:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:45:24,883 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2020-12-23 06:45:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:45:24,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-12-23 06:45:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:45:24,886 INFO L225 Difference]: With dead ends: 94 [2020-12-23 06:45:24,886 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:45:24,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:45:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:45:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-12-23 06:45:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 06:45:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-12-23 06:45:24,896 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 27 [2020-12-23 06:45:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:45:24,896 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-12-23 06:45:24,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:45:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-12-23 06:45:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:45:24,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:45:24,898 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:45:25,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:45:25,113 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:45:25,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:45:25,115 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 5 times [2020-12-23 06:45:25,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:45:25,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341963023] [2020-12-23 06:45:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:45:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:45:25,145 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:45:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:45:25,178 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:45:25,210 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:45:25,210 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:45:25,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 06:45:25,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:45:25 BoogieIcfgContainer [2020-12-23 06:45:25,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:45:25,278 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:45:25,278 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:45:25,279 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:45:25,280 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:45:20" (3/4) ... [2020-12-23 06:45:25,286 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 06:45:25,286 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:45:25,289 INFO L168 Benchmark]: Toolchain (without parser) took 6293.53 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.5 MB in the beginning and 140.6 MB in the end (delta: -14.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:45:25,290 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 151.0 MB. Free memory was 122.8 MB in the beginning and 122.4 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:45:25,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 448.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 114.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 06:45:25,292 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.79 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 111.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:45:25,293 INFO L168 Benchmark]: Boogie Preprocessor took 58.50 ms. Allocated memory is still 151.0 MB. Free memory was 111.9 MB in the beginning and 110.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:45:25,294 INFO L168 Benchmark]: RCFGBuilder took 952.83 ms. Allocated memory is still 151.0 MB. Free memory was 110.2 MB in the beginning and 115.1 MB in the end (delta: -5.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:45:25,295 INFO L168 Benchmark]: TraceAbstraction took 4743.75 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 114.6 MB in the beginning and 140.6 MB in the end (delta: -26.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:45:25,295 INFO L168 Benchmark]: Witness Printer took 8.18 ms. Allocated memory is still 181.4 MB. Free memory is still 140.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:45:25,300 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 151.0 MB. Free memory was 122.8 MB in the beginning and 122.4 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 448.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 114.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 69.79 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 111.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.50 ms. Allocated memory is still 151.0 MB. Free memory was 111.9 MB in the beginning and 110.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 952.83 ms. Allocated memory is still 151.0 MB. Free memory was 110.2 MB in the beginning and 115.1 MB in the end (delta: -5.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4743.75 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 114.6 MB in the beginning and 140.6 MB in the end (delta: -26.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. * Witness Printer took 8.18 ms. Allocated memory is still 181.4 MB. Free memory is still 140.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 100. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [a={4:0}, b={3:0}, x={5:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={4:0}, b={3:0}, x={5:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={3:0}, x={5:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={3:0}, x={5:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={3:0}, x={5:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={3:0}, x={5:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={3:0}, x={5:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND FALSE !(j <= n) VAL [a={4:0}, b={3:0}, x={5:0}] [L6] COND TRUE !(cond) VAL [a={4:0}, b={3:0}, x={5:0}] [L7] reach_error() VAL [a={4:0}, b={3:0}, x={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 353 SDslu, 229 SDs, 0 SdLazy, 229 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 36 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 258 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 19428 SizeOfPredicates, 12 NumberOfNonLiveVariables, 566 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 10/202 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...