/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/reducercommutativity/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:25:27,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:25:27,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:25:27,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:25:27,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:25:27,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:25:27,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:25:27,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:25:27,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:25:27,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:25:27,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:25:27,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:25:27,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:25:27,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:25:27,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:25:27,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:25:27,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:25:27,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:25:27,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:25:27,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:25:27,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:25:27,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:25:27,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:25:27,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:25:27,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:25:27,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:25:27,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:25:27,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:25:27,921 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 00:25:27,969 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:25:27,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:25:27,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:25:27,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:25:27,974 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:25:27,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:25:27,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:25:27,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:25:27,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:25:27,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:25:27,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:25:27,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:25:27,977 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:25:27,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:25:27,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:25:27,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:25:27,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:25:27,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:25:27,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:25:27,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:25:27,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:25:27,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:25:27,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:25:27,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:25:27,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:25:27,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:25:28,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:25:28,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:25:28,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:25:28,404 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:25:28,410 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:25:28,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum05.i [2020-12-23 00:25:28,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/239efaf05/4f2fb0e110124b13a3f795fc9738be29/FLAGc1656624b [2020-12-23 00:25:29,193 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:25:29,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i [2020-12-23 00:25:29,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/239efaf05/4f2fb0e110124b13a3f795fc9738be29/FLAGc1656624b [2020-12-23 00:25:29,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/239efaf05/4f2fb0e110124b13a3f795fc9738be29 [2020-12-23 00:25:29,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:25:29,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:25:29,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:25:29,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:25:29,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:25:29,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5549dadf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29, skipping insertion in model container [2020-12-23 00:25:29,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:25:29,589 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~cnt~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[4]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:25:29,772 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/reducercommutativity/rangesum05.i[1457,1470] [2020-12-23 00:25:29,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:25:29,784 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~cnt~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[16],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:25:29,811 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/reducercommutativity/rangesum05.i[1457,1470] [2020-12-23 00:25:29,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:25:29,829 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:25:29,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29 WrapperNode [2020-12-23 00:25:29,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:25:29,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:25:29,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:25:29,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:25:29,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:25:29,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:25:29,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:25:29,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:25:29,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (1/1) ... [2020-12-23 00:25:29,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:25:29,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:25:29,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:25:29,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:25:29,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (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 00:25:30,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:25:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:25:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:25:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:25:30,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:25:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:25:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:25:30,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:25:30,452 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 00:25:30,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:25:30 BoogieIcfgContainer [2020-12-23 00:25:30,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:25:30,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:25:30,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:25:30,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:25:30,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:25:29" (1/3) ... [2020-12-23 00:25:30,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651cd3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:25:30, skipping insertion in model container [2020-12-23 00:25:30,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:29" (2/3) ... [2020-12-23 00:25:30,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651cd3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:25:30, skipping insertion in model container [2020-12-23 00:25:30,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:25:30" (3/3) ... [2020-12-23 00:25:30,463 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-12-23 00:25:30,470 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:25:30,474 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:25:30,495 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:25:30,523 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:25:30,524 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:25:30,524 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:25:30,524 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:25:30,524 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:25:30,524 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:25:30,524 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:25:30,525 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:25:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-23 00:25:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:25:30,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:30,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:30,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2020-12-23 00:25:30,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:30,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128118325] [2020-12-23 00:25:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:30,742 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 00:25:30,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128118325] [2020-12-23 00:25:30,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:30,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:25:30,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518770805] [2020-12-23 00:25:30,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:25:30,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:30,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:25:30,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:25:30,775 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-23 00:25:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:30,804 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2020-12-23 00:25:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:25:30,805 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-23 00:25:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:30,834 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:25:30,835 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:25:30,841 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 00:25:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:25:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 00:25:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:25:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-23 00:25:30,887 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2020-12-23 00:25:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:30,887 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-23 00:25:30,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:25:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-23 00:25:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:25:30,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:30,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:30,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:25:30,892 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:30,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:30,895 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2020-12-23 00:25:30,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:30,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683681464] [2020-12-23 00:25:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:30,936 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:30,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721103958] [2020-12-23 00:25:30,937 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 00:25:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:31,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:31,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:31,116 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 00:25:31,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683681464] [2020-12-23 00:25:31,117 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:31,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721103958] [2020-12-23 00:25:31,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:31,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:25:31,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620155565] [2020-12-23 00:25:31,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:31,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:31,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:31,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:25:31,121 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2020-12-23 00:25:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:31,141 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-12-23 00:25:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:31,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:25:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:31,143 INFO L225 Difference]: With dead ends: 50 [2020-12-23 00:25:31,143 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:25:31,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 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 00:25:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:25:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 00:25:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:25:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-12-23 00:25:31,150 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2020-12-23 00:25:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:31,150 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-12-23 00:25:31,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-12-23 00:25:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:25:31,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:31,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:31,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:25:31,367 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:31,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2020-12-23 00:25:31,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:31,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139187785] [2020-12-23 00:25:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:31,465 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 00:25:31,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139187785] [2020-12-23 00:25:31,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943026121] [2020-12-23 00:25:31,466 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 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 00:25:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:31,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:31,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:25:31,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:31,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:31,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232906248] [2020-12-23 00:25:31,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:31,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:31,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:31,594 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-12-23 00:25:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:31,642 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-12-23 00:25:31,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:31,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:25:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:31,643 INFO L225 Difference]: With dead ends: 57 [2020-12-23 00:25:31,643 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 00:25:31,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:31,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 00:25:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-23 00:25:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:25:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-23 00:25:31,651 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2020-12-23 00:25:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:31,651 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-23 00:25:31,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-23 00:25:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:25:31,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:31,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:31,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:31,869 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:31,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:31,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2020-12-23 00:25:31,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:31,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580313041] [2020-12-23 00:25:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:25:31,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580313041] [2020-12-23 00:25:31,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661996154] [2020-12-23 00:25:31,945 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 00:25:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:32,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:32,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:32,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270514335] [2020-12-23 00:25:32,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:32,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:32,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:32,059 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2020-12-23 00:25:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:32,090 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-12-23 00:25:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:32,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-23 00:25:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:32,093 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:25:32,097 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:25:32,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:25:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 00:25:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:25:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-23 00:25:32,111 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2020-12-23 00:25:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:32,112 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-23 00:25:32,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-23 00:25:32,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:25:32,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:32,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:32,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:32,324 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:32,326 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2020-12-23 00:25:32,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:32,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347335371] [2020-12-23 00:25:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:32,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347335371] [2020-12-23 00:25:32,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391589347] [2020-12-23 00:25:32,398 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 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 00:25:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:32,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:32,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:25:32,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:32,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:32,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574789539] [2020-12-23 00:25:32,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:32,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:32,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:32,527 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-12-23 00:25:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:32,581 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2020-12-23 00:25:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:32,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-23 00:25:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:32,583 INFO L225 Difference]: With dead ends: 78 [2020-12-23 00:25:32,583 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 00:25:32,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 00:25:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-23 00:25:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:25:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-23 00:25:32,593 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2020-12-23 00:25:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:32,594 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-23 00:25:32,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-23 00:25:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:25:32,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:32,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:32,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:32,807 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:32,809 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2020-12-23 00:25:32,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:32,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240569985] [2020-12-23 00:25:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:32,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240569985] [2020-12-23 00:25:32,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170175839] [2020-12-23 00:25:32,870 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 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 00:25:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:32,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:32,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:33,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:33,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:25:33,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99866050] [2020-12-23 00:25:33,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:33,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:33,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:33,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:33,018 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2020-12-23 00:25:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:33,038 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2020-12-23 00:25:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:33,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 00:25:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:33,040 INFO L225 Difference]: With dead ends: 90 [2020-12-23 00:25:33,040 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:25:33,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:25:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:25:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:25:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-12-23 00:25:33,047 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2020-12-23 00:25:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:33,047 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-12-23 00:25:33,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-12-23 00:25:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:25:33,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:33,049 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:33,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:25:33,263 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:33,264 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2020-12-23 00:25:33,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:33,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578673448] [2020-12-23 00:25:33,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:25:33,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578673448] [2020-12-23 00:25:33,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780930983] [2020-12-23 00:25:33,339 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 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 00:25:33,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:25:33,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:33,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:25:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:25:33,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:33,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-23 00:25:33,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877660900] [2020-12-23 00:25:33,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:25:33,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:33,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:25:33,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:33,520 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-12-23 00:25:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:33,599 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2020-12-23 00:25:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:25:33,600 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-23 00:25:33,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:33,601 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:25:33,602 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 00:25:33,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:25:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 00:25:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-12-23 00:25:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 00:25:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-23 00:25:33,614 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2020-12-23 00:25:33,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:33,614 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-23 00:25:33,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:25:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-23 00:25:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:25:33,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:33,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:33,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:33,832 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2020-12-23 00:25:33,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:33,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508649247] [2020-12-23 00:25:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 00:25:33,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508649247] [2020-12-23 00:25:33,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964764882] [2020-12-23 00:25:33,877 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:33,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:25:34,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:34,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:25:34,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249694847] [2020-12-23 00:25:34,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:34,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:34,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:34,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:34,030 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2020-12-23 00:25:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:34,128 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2020-12-23 00:25:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:34,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-23 00:25:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:34,132 INFO L225 Difference]: With dead ends: 162 [2020-12-23 00:25:34,132 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 00:25:34,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 00:25:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-23 00:25:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:25:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-23 00:25:34,146 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2020-12-23 00:25:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:34,146 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-23 00:25:34,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-23 00:25:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:25:34,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:34,149 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:34,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:34,364 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:34,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2020-12-23 00:25:34,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:34,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371124355] [2020-12-23 00:25:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:34,385 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:34,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859308859] [2020-12-23 00:25:34,386 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:34,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:34,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:34,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:34,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-23 00:25:34,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371124355] [2020-12-23 00:25:34,565 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:34,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859308859] [2020-12-23 00:25:34,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:34,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:34,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261232748] [2020-12-23 00:25:34,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:34,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:34,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:34,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:34,568 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2020-12-23 00:25:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:34,601 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-12-23 00:25:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:34,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-23 00:25:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:34,603 INFO L225 Difference]: With dead ends: 174 [2020-12-23 00:25:34,603 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:25:34,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:25:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:25:34,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:25:34,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2020-12-23 00:25:34,614 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2020-12-23 00:25:34,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:34,614 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2020-12-23 00:25:34,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2020-12-23 00:25:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:25:34,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:34,616 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:34,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:25:34,825 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:34,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:34,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2020-12-23 00:25:34,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:34,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063797221] [2020-12-23 00:25:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:25:34,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063797221] [2020-12-23 00:25:34,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:34,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:25:34,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111411769] [2020-12-23 00:25:34,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:34,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:34,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:34,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:34,886 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2020-12-23 00:25:34,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:34,955 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2020-12-23 00:25:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:34,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-23 00:25:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:34,956 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:25:34,957 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:25:34,957 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 00:25:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:25:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2020-12-23 00:25:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:25:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-12-23 00:25:34,967 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2020-12-23 00:25:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:34,967 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-12-23 00:25:34,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:34,967 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-12-23 00:25:34,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:25:34,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:34,969 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:34,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 00:25:34,969 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:34,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:34,970 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2020-12-23 00:25:34,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:34,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500330641] [2020-12-23 00:25:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:34,984 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:34,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328712484] [2020-12-23 00:25:34,985 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:35,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:35,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 00:25:35,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500330641] [2020-12-23 00:25:35,154 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:35,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328712484] [2020-12-23 00:25:35,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:35,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:25:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583628370] [2020-12-23 00:25:35,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:35,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:35,156 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2020-12-23 00:25:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:35,201 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2020-12-23 00:25:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:35,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-23 00:25:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:35,202 INFO L225 Difference]: With dead ends: 157 [2020-12-23 00:25:35,203 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 00:25:35,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 00:25:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-23 00:25:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:25:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-12-23 00:25:35,211 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2020-12-23 00:25:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:35,212 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-12-23 00:25:35,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-12-23 00:25:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:25:35,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:35,213 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:35,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:35,428 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:35,430 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2020-12-23 00:25:35,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:35,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359991167] [2020-12-23 00:25:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:35,465 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:35,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893430301] [2020-12-23 00:25:35,465 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:35,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:35,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 00:25:35,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359991167] [2020-12-23 00:25:35,639 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:35,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893430301] [2020-12-23 00:25:35,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:35,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:35,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905857496] [2020-12-23 00:25:35,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:35,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:35,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:35,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:35,641 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 5 states. [2020-12-23 00:25:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:35,712 INFO L93 Difference]: Finished difference Result 166 states and 202 transitions. [2020-12-23 00:25:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:35,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-12-23 00:25:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:35,714 INFO L225 Difference]: With dead ends: 166 [2020-12-23 00:25:35,714 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 00:25:35,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 00:25:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-23 00:25:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:25:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-12-23 00:25:35,723 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 56 [2020-12-23 00:25:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:35,724 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-12-23 00:25:35,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-12-23 00:25:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:25:35,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:35,726 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:35,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:35,940 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash 35998627, now seen corresponding path program 3 times [2020-12-23 00:25:35,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:35,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530805386] [2020-12-23 00:25:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:35,959 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:35,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092315488] [2020-12-23 00:25:35,959 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:36,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:25:36,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-12-23 00:25:36,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530805386] [2020-12-23 00:25:36,118 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:36,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092315488] [2020-12-23 00:25:36,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:36,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:25:36,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628126947] [2020-12-23 00:25:36,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:36,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:36,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:36,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:36,125 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 4 states. [2020-12-23 00:25:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:36,156 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-12-23 00:25:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:36,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-23 00:25:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:36,158 INFO L225 Difference]: With dead ends: 132 [2020-12-23 00:25:36,158 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:25:36,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 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 00:25:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:25:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-12-23 00:25:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 00:25:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-12-23 00:25:36,164 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 65 [2020-12-23 00:25:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:36,164 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-12-23 00:25:36,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:36,164 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-12-23 00:25:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:25:36,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:36,166 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:36,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:25:36,381 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:36,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1841436961, now seen corresponding path program 1 times [2020-12-23 00:25:36,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:36,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641104896] [2020-12-23 00:25:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:36,397 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:36,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531113884] [2020-12-23 00:25:36,397 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:36,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:36,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:25:36,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641104896] [2020-12-23 00:25:36,588 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:36,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531113884] [2020-12-23 00:25:36,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:36,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:25:36,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092574222] [2020-12-23 00:25:36,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:36,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:36,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:36,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:36,590 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 7 states. [2020-12-23 00:25:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:36,697 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2020-12-23 00:25:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:36,698 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-12-23 00:25:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:36,699 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:25:36,699 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:25:36,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:36,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:25:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-23 00:25:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 00:25:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-12-23 00:25:36,709 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 65 [2020-12-23 00:25:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:36,712 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-12-23 00:25:36,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-12-23 00:25:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 00:25:36,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:36,713 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:36,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:25:36,928 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash -484525568, now seen corresponding path program 2 times [2020-12-23 00:25:36,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:36,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918256809] [2020-12-23 00:25:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:36,945 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:36,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408109504] [2020-12-23 00:25:36,945 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:37,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:37,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:25:37,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918256809] [2020-12-23 00:25:37,106 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:37,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408109504] [2020-12-23 00:25:37,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:37,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 00:25:37,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036203395] [2020-12-23 00:25:37,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:37,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:37,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:37,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:37,108 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 4 states. [2020-12-23 00:25:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:37,123 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2020-12-23 00:25:37,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:37,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-23 00:25:37,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:37,125 INFO L225 Difference]: With dead ends: 100 [2020-12-23 00:25:37,125 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 00:25:37,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 71 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 00:25:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 00:25:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-23 00:25:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 00:25:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-12-23 00:25:37,131 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 74 [2020-12-23 00:25:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:37,131 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-12-23 00:25:37,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-12-23 00:25:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 00:25:37,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:37,132 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:37,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:25:37,346 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:37,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1416102914, now seen corresponding path program 3 times [2020-12-23 00:25:37,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:37,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459660385] [2020-12-23 00:25:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:37,362 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:37,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417217115] [2020-12-23 00:25:37,362 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:37,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:25:37,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:37,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:37,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:25:37,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459660385] [2020-12-23 00:25:37,739 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:37,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417217115] [2020-12-23 00:25:37,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:37,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:37,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787519231] [2020-12-23 00:25:37,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:37,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:37,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:37,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:37,741 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-12-23 00:25:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:37,762 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-12-23 00:25:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:37,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-12-23 00:25:37,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:37,763 INFO L225 Difference]: With dead ends: 102 [2020-12-23 00:25:37,763 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 00:25:37,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 00:25:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-23 00:25:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 00:25:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-12-23 00:25:37,769 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2020-12-23 00:25:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:37,769 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-12-23 00:25:37,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-12-23 00:25:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 00:25:37,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:37,771 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:37,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:37,985 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:37,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:37,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 4 times [2020-12-23 00:25:37,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:37,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270302970] [2020-12-23 00:25:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:38,001 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:38,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688044896] [2020-12-23 00:25:38,002 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:38,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:38,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:38,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:38,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-23 00:25:38,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270302970] [2020-12-23 00:25:38,212 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:38,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688044896] [2020-12-23 00:25:38,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:38,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:38,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499915272] [2020-12-23 00:25:38,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:38,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:38,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:38,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:38,214 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 6 states. [2020-12-23 00:25:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:38,242 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-12-23 00:25:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:38,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-23 00:25:38,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:38,245 INFO L225 Difference]: With dead ends: 103 [2020-12-23 00:25:38,245 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:25:38,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:25:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-23 00:25:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 00:25:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-12-23 00:25:38,250 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2020-12-23 00:25:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:38,251 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-12-23 00:25:38,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-12-23 00:25:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 00:25:38,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:38,252 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:38,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:25:38,467 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 5 times [2020-12-23 00:25:38,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:38,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120007315] [2020-12-23 00:25:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:38,482 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:38,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504073372] [2020-12-23 00:25:38,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:38,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:25:38,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-23 00:25:38,896 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 00:25:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 00:25:39,104 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 00:25:39,322 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 00:25:39,322 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 00:25:39,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:25:39,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 12:25:39 BoogieIcfgContainer [2020-12-23 00:25:39,621 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 00:25:39,622 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 00:25:39,622 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 00:25:39,622 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 00:25:39,622 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:25:30" (3/4) ... [2020-12-23 00:25:39,624 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 00:25:39,716 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/reducercommutativity/rangesum05.i-witness.graphml [2020-12-23 00:25:39,717 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 00:25:39,718 INFO L168 Benchmark]: Toolchain (without parser) took 10172.85 ms. Allocated memory was 159.4 MB in the beginning and 234.9 MB in the end (delta: 75.5 MB). Free memory was 134.1 MB in the beginning and 131.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 79.5 MB. Max. memory is 8.0 GB. [2020-12-23 00:25:39,719 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 159.4 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 00:25:39,719 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.26 ms. Allocated memory is still 159.4 MB. Free memory was 134.0 MB in the beginning and 123.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 00:25:39,720 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.67 ms. Allocated memory is still 159.4 MB. Free memory was 123.9 MB in the beginning and 121.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 00:25:39,720 INFO L168 Benchmark]: Boogie Preprocessor took 34.90 ms. Allocated memory is still 159.4 MB. Free memory was 121.9 MB in the beginning and 120.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 00:25:39,721 INFO L168 Benchmark]: RCFGBuilder took 534.77 ms. Allocated memory is still 159.4 MB. Free memory was 120.4 MB in the beginning and 138.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. [2020-12-23 00:25:39,722 INFO L168 Benchmark]: TraceAbstraction took 9165.41 ms. Allocated memory was 159.4 MB in the beginning and 234.9 MB in the end (delta: 75.5 MB). Free memory was 137.9 MB in the beginning and 139.0 MB in the end (delta: -1.0 MB). Peak memory consumption was 76.0 MB. Max. memory is 8.0 GB. [2020-12-23 00:25:39,722 INFO L168 Benchmark]: Witness Printer took 95.07 ms. Allocated memory is still 234.9 MB. Free memory was 139.0 MB in the beginning and 131.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2020-12-23 00:25:39,725 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 159.4 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.26 ms. Allocated memory is still 159.4 MB. Free memory was 134.0 MB in the beginning and 123.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 51.67 ms. Allocated memory is still 159.4 MB. Free memory was 123.9 MB in the beginning and 121.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.90 ms. Allocated memory is still 159.4 MB. Free memory was 121.9 MB in the beginning and 120.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 534.77 ms. Allocated memory is still 159.4 MB. Free memory was 120.4 MB in the beginning and 138.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9165.41 ms. Allocated memory was 159.4 MB in the beginning and 234.9 MB in the end (delta: 75.5 MB). Free memory was 137.9 MB in the beginning and 139.0 MB in the end (delta: -1.0 MB). Peak memory consumption was 76.0 MB. Max. memory is 8.0 GB. * Witness Printer took 95.07 ms. Allocated memory is still 234.9 MB. Free memory was 139.0 MB in the beginning and 131.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 5) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 526 SDtfs, 266 SDslu, 677 SDs, 0 SdLazy, 362 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 721 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 95 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 1024 NumberOfCodeBlocks, 941 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 921 ConstructedInterpolants, 0 QuantifiedInterpolants, 58587 SizeOfPredicates, 5 NumberOfNonLiveVariables, 2576 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 765/844 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...