/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/float-benchs/filter2_alt.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:06:39,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:06:39,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:06:39,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:06:39,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:06:39,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:06:39,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:06:39,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:06:39,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:06:39,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:06:39,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:06:39,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:06:39,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:06:39,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:06:39,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:06:39,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:06:39,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:06:39,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:06:39,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:06:39,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:06:39,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:06:39,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:06:39,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:06:39,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:06:39,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 06:06:39,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 06:06:39,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 06:06:39,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 06:06:39,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 06:06:39,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 06:06:39,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:06:39,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:06:39,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:06:39,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:06:39,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:06:39,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:06:39,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:06:39,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:06:39,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:06:39,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:06:39,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:06:39,643 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 06:06:39,691 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:06:39,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:06:39,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:06:39,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:06:39,697 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:06:39,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:06:39,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:06:39,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:06:39,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:06:39,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:06:39,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:06:39,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:06:39,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:06:39,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:06:39,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:06:39,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:06:39,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:06:39,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:06:39,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:06:39,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:06:39,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:06:39,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:06:39,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:06:39,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:06:39,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:06:39,704 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:06:40,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:06:40,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:06:40,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:06:40,144 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:06:40,145 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:06:40,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_alt.c [2020-12-23 06:06:40,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/299505330/2edaaaea399448eaa453ed9fdedaa3e5/FLAG8eb47b93a [2020-12-23 06:06:40,840 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:06:40,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_alt.c [2020-12-23 06:06:40,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/299505330/2edaaaea399448eaa453ed9fdedaa3e5/FLAG8eb47b93a [2020-12-23 06:06:41,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/299505330/2edaaaea399448eaa453ed9fdedaa3e5 [2020-12-23 06:06:41,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:06:41,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:06:41,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:06:41,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:06:41,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:06:41,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a0f6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41, skipping insertion in model container [2020-12-23 06:06:41,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:06:41,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:06:41,534 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/float-benchs/filter2_alt.c[631,644] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~S~0,GLOBAL],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~P~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~E~0,GLOBAL],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~P~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~E~0,GLOBAL],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~E~0,GLOBAL],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~S~0,GLOBAL],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~S~0,GLOBAL],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~X~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~INIT~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~X~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~INIT~0,GLOBAL] [2020-12-23 06:06:41,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:06:41,595 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:06:41,614 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/float-benchs/filter2_alt.c[631,644] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#S~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~#S~0,GLOBAL],offset]]] left hand side expression in assignment: lhs: VariableLHS[~P~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#E~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~#E~0,GLOBAL],offset]]] left hand side expression in assignment: lhs: VariableLHS[~P~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#E~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#E~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#E~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~#E~0,GLOBAL],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#S~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#S~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#S~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~#S~0,GLOBAL],offset]]] left hand side expression in assignment: lhs: VariableLHS[~X~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~INIT~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~X~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~INIT~0,GLOBAL] [2020-12-23 06:06:41,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:06:41,667 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:06:41,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41 WrapperNode [2020-12-23 06:06:41,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:06:41,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:06:41,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:06:41,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:06:41,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:06:41,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:06:41,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:06:41,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:06:41,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (1/1) ... [2020-12-23 06:06:41,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:06:41,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:06:41,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:06:41,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:06:41,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (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 06:06:41,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:06:41,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:06:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-23 06:06:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-23 06:06:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:06:41,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:06:41,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-12-23 06:06:42,301 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:06:42,301 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 06:06:42,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:06:42 BoogieIcfgContainer [2020-12-23 06:06:42,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:06:42,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:06:42,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:06:42,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:06:42,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:06:41" (1/3) ... [2020-12-23 06:06:42,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17691c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:06:42, skipping insertion in model container [2020-12-23 06:06:42,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:41" (2/3) ... [2020-12-23 06:06:42,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17691c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:06:42, skipping insertion in model container [2020-12-23 06:06:42,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:06:42" (3/3) ... [2020-12-23 06:06:42,326 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_alt.c [2020-12-23 06:06:42,333 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:06:42,337 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:06:42,357 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:06:42,382 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:06:42,383 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:06:42,383 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:06:42,383 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:06:42,383 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:06:42,383 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:06:42,383 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:06:42,384 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:06:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 06:06:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:06:42,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:42,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:42,402 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:42,408 INFO L82 PathProgramCache]: Analyzing trace with hash -711541957, now seen corresponding path program 1 times [2020-12-23 06:06:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:42,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092097225] [2020-12-23 06:06:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:42,657 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 06:06:42,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092097225] [2020-12-23 06:06:42,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:06:42,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:06:42,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097472397] [2020-12-23 06:06:42,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:06:42,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:42,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:06:42,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:06:42,691 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 06:06:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:42,712 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2020-12-23 06:06:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:06:42,714 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-23 06:06:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:42,724 INFO L225 Difference]: With dead ends: 31 [2020-12-23 06:06:42,725 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:06:42,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:06:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:06:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 06:06:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:06:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 06:06:42,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-23 06:06:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:42,772 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 06:06:42,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:06:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 06:06:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:06:42,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:42,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:42,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:06:42,777 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1047310665, now seen corresponding path program 1 times [2020-12-23 06:06:42,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:42,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282512244] [2020-12-23 06:06:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:42,994 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 06:06:42,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282512244] [2020-12-23 06:06:42,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:06:42,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:06:42,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654138351] [2020-12-23 06:06:42,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:06:42,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:06:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:06:43,002 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2020-12-23 06:06:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:43,047 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-23 06:06:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:06:43,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 06:06:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:43,049 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:06:43,049 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:06:43,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:06:43,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:06:43,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-23 06:06:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 06:06:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 06:06:43,061 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2020-12-23 06:06:43,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:43,062 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 06:06:43,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:06:43,062 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 06:06:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:06:43,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:43,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:43,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:06:43,064 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:43,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash 60789832, now seen corresponding path program 1 times [2020-12-23 06:06:43,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:43,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290604602] [2020-12-23 06:06:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:06:43,141 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:06:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:06:43,186 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:06:43,221 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:06:43,221 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:06:43,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:06:43,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:06:43 BoogieIcfgContainer [2020-12-23 06:06:43,270 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:06:43,271 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:06:43,271 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:06:43,271 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:06:43,272 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:06:42" (3/4) ... [2020-12-23 06:06:43,276 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 06:06:43,277 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:06:43,279 INFO L168 Benchmark]: Toolchain (without parser) took 2038.43 ms. Allocated memory is still 172.0 MB. Free memory was 146.3 MB in the beginning and 114.8 MB in the end (delta: 31.5 MB). Peak memory consumption was 30.6 MB. Max. memory is 8.0 GB. [2020-12-23 06:06:43,280 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 172.0 MB. Free memory was 144.7 MB in the beginning and 144.6 MB in the end (delta: 80.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:06:43,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 423.36 ms. Allocated memory is still 172.0 MB. Free memory was 146.1 MB in the beginning and 135.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:06:43,282 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.50 ms. Allocated memory is still 172.0 MB. Free memory was 135.6 MB in the beginning and 133.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:06:43,283 INFO L168 Benchmark]: Boogie Preprocessor took 64.08 ms. Allocated memory is still 172.0 MB. Free memory was 133.9 MB in the beginning and 132.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:06:43,285 INFO L168 Benchmark]: RCFGBuilder took 509.45 ms. Allocated memory is still 172.0 MB. Free memory was 132.6 MB in the beginning and 148.9 MB in the end (delta: -16.3 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. [2020-12-23 06:06:43,285 INFO L168 Benchmark]: TraceAbstraction took 950.56 ms. Allocated memory is still 172.0 MB. Free memory was 148.9 MB in the beginning and 114.8 MB in the end (delta: 34.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2020-12-23 06:06:43,286 INFO L168 Benchmark]: Witness Printer took 5.85 ms. Allocated memory is still 172.0 MB. Free memory is still 114.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:06:43,291 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 172.0 MB. Free memory was 144.7 MB in the beginning and 144.6 MB in the end (delta: 80.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 423.36 ms. Allocated memory is still 172.0 MB. Free memory was 146.1 MB in the beginning and 135.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 72.50 ms. Allocated memory is still 172.0 MB. Free memory was 135.6 MB in the beginning and 133.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.08 ms. Allocated memory is still 172.0 MB. Free memory was 133.9 MB in the beginning and 132.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 509.45 ms. Allocated memory is still 172.0 MB. Free memory was 132.6 MB in the beginning and 148.9 MB in the end (delta: -16.3 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 950.56 ms. Allocated memory is still 172.0 MB. Free memory was 148.9 MB in the beginning and 114.8 MB in the end (delta: 34.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * Witness Printer took 5.85 ms. Allocated memory is still 172.0 MB. Free memory is still 114.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 43, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L19] BOOLEAN INIT; [L20] float P, X; [L32] static float E[2], S[2]; VAL [E={3:0}, INIT=0, P=0, S={5:0}, X=0] [L24] float x; [L25] x = __VERIFIER_nondet_float() [L12] COND FALSE !(!cond) VAL [E={3:0}, INIT=0, P=0, S={5:0}, X=0] [L27] return x; VAL [E={3:0}, INIT=0, P=0, S={5:0}, X=0] [L52] X = RANDOM_INPUT() [L53] INIT = TRUE VAL [E={3:0}, INIT=1, P=0, S={5:0}, X=50] [L54] COND TRUE \read(TRUE) [L24] float x; [L25] x = __VERIFIER_nondet_float() [L12] COND FALSE !(!cond) VAL [E={3:0}, INIT=1, P=0, S={5:0}, X=50] [L27] return x; VAL [E={3:0}, INIT=1, P=0, S={5:0}, X=50] [L55] X = RANDOM_INPUT() [L33] COND TRUE \read(INIT) [L34] S[0] = X [L35] P = X [L36] E[0] = X VAL [E={3:0}, INIT=1, P=51, S={5:0}, X=51] [L46] EXPR E[0] [L46] E[1] = E[0] [L46] E[0] = X [L47] EXPR S[0] [L47] S[1] = S[0] [L47] S[0] = P VAL [E={3:0}, INIT=1, P=51, S={5:0}, X=51] [L57] INIT = FALSE VAL [E={3:0}, INIT=0, P=51, S={5:0}, X=51] [L54] COND TRUE \read(TRUE) [L24] float x; [L25] x = __VERIFIER_nondet_float() [L12] COND FALSE !(!cond) VAL [E={3:0}, INIT=0, P=51, S={5:0}, X=51] [L27] return x; VAL [E={3:0}, INIT=0, P=51, S={5:0}, X=51] [L55] X = RANDOM_INPUT() [L33] COND FALSE !(\read(INIT)) [L39] EXPR E[0] [L40] EXPR E[1] [L41] EXPR S[0] [L42] EXPR S[1] [L38-L42] P = (((((0.4677826f * X) - (E[0] * 0.7700725f)) + (E[1] * 0.4344376f)) + (S[0] * 1.5419f)) - (S[1] * 0.6740477f)) [L14] COND TRUE !(cond) VAL [E={3:0}, INIT=0, S={5:0}, X=55] [L14] reach_error() VAL [E={3:0}, INIT=0, S={5:0}, X=55] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 2 SDslu, 11 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 352 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...