/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/array-multidimensional/add-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:52:36,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:52:36,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:52:36,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:52:36,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:52:36,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:52:36,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:52:36,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:52:36,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:52:36,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:52:36,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:52:36,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:52:36,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:52:36,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:52:36,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:52:36,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:52:36,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:52:36,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:52:36,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:52:36,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:52:36,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:52:36,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:52:36,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:52:36,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:52:36,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:52:36,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:52:36,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:52:36,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:52:36,892 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 00:52:36,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:52:36,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:52:36,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:52:36,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:52:36,975 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:52:36,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:52:36,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:52:36,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:52:36,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:52:36,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:52:36,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:52:36,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:52:36,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:52:36,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:52:36,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:52:36,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:52:36,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:52:36,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:52:36,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:52:36,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:52:36,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:52:36,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:52:36,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:52:36,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:52:36,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:52:36,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:52:37,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:52:37,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:52:37,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:52:37,605 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:52:37,606 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:52:37,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2020-12-23 00:52:37,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/33bedf645/86348fc4ada6464aae05b760344cd4dc/FLAGb5b2fa085 [2020-12-23 00:52:38,446 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:52:38,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2020-12-23 00:52:38,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/33bedf645/86348fc4ada6464aae05b760344cd4dc/FLAGb5b2fa085 [2020-12-23 00:52:38,815 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/33bedf645/86348fc4ada6464aae05b760344cd4dc [2020-12-23 00:52:38,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:52:38,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:52:38,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:52:38,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:52:38,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:52:38,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:52:38" (1/1) ... [2020-12-23 00:52:38,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@219a9b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:38, skipping insertion in model container [2020-12-23 00:52:38,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:52:38" (1/1) ... [2020-12-23 00:52:38,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:52:38,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:52:39,200 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/array-multidimensional/add-2-n-u.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~B~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~C~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:52:39,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:52:39,257 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:52:39,274 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/array-multidimensional/add-2-n-u.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#B~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#B~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#C~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#C~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:52:39,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:52:39,312 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:52:39,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39 WrapperNode [2020-12-23 00:52:39,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:52:39,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:52:39,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:52:39,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:52:39,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (1/1) ... [2020-12-23 00:52:39,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (1/1) ... [2020-12-23 00:52:39,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:52:39,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:52:39,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:52:39,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:52:39,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (1/1) ... [2020-12-23 00:52:39,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (1/1) ... [2020-12-23 00:52:39,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (1/1) ... [2020-12-23 00:52:39,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (1/1) ... [2020-12-23 00:52:39,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (1/1) ... [2020-12-23 00:52:39,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (1/1) ... [2020-12-23 00:52:39,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (1/1) ... [2020-12-23 00:52:39,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:52:39,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:52:39,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:52:39,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:52:39,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (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 00:52:39,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:52:39,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:52:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:52:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:52:39,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:52:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:52:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:52:39,998 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:52:39,998 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 00:52:40,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:52:40 BoogieIcfgContainer [2020-12-23 00:52:40,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:52:40,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:52:40,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:52:40,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:52:40,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:52:38" (1/3) ... [2020-12-23 00:52:40,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23912811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:52:40, skipping insertion in model container [2020-12-23 00:52:40,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:39" (2/3) ... [2020-12-23 00:52:40,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23912811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:52:40, skipping insertion in model container [2020-12-23 00:52:40,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:52:40" (3/3) ... [2020-12-23 00:52:40,014 INFO L111 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2020-12-23 00:52:40,023 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:52:40,031 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:52:40,063 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:52:40,101 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:52:40,101 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:52:40,101 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:52:40,101 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:52:40,102 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:52:40,102 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:52:40,102 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:52:40,102 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:52:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 00:52:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:52:40,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:40,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:40,140 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:40,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2020-12-23 00:52:40,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:40,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161201668] [2020-12-23 00:52:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:40,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:40,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289327033] [2020-12-23 00:52:40,316 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 00:52:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:40,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:52:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:40,619 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 00:52:40,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161201668] [2020-12-23 00:52:40,620 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:40,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289327033] [2020-12-23 00:52:40,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:40,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:52:40,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64678154] [2020-12-23 00:52:40,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:52:40,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:40,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:52:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:52:40,658 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-12-23 00:52:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:40,749 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2020-12-23 00:52:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:52:40,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:52:40,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:40,766 INFO L225 Difference]: With dead ends: 43 [2020-12-23 00:52:40,767 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 00:52:40,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 00:52:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 00:52:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-23 00:52:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:52:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2020-12-23 00:52:40,833 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2020-12-23 00:52:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:40,834 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2020-12-23 00:52:40,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:52:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2020-12-23 00:52:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:52:40,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:40,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:41,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:52:41,050 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:41,052 INFO L82 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2020-12-23 00:52:41,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:41,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381385381] [2020-12-23 00:52:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:41,098 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:41,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004791592] [2020-12-23 00:52:41,099 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 00:52:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:52:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:41,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381385381] [2020-12-23 00:52:41,312 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:41,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004791592] [2020-12-23 00:52:41,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:41,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:52:41,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060230559] [2020-12-23 00:52:41,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:52:41,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:41,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:52:41,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:41,329 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2020-12-23 00:52:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:41,435 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-12-23 00:52:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:52:41,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 00:52:41,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:41,439 INFO L225 Difference]: With dead ends: 43 [2020-12-23 00:52:41,440 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:52:41,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 00:52:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:52:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2020-12-23 00:52:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:52:41,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-23 00:52:41,457 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2020-12-23 00:52:41,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:41,457 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-23 00:52:41,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:52:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-23 00:52:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:52:41,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:41,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:41,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:41,670 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:41,672 INFO L82 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2020-12-23 00:52:41,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:41,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518403027] [2020-12-23 00:52:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:41,689 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:41,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626014818] [2020-12-23 00:52:41,692 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 00:52:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:41,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:52:41,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:41,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518403027] [2020-12-23 00:52:41,928 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:41,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626014818] [2020-12-23 00:52:41,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:41,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:52:41,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228314743] [2020-12-23 00:52:41,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:52:41,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:41,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:52:41,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:52:41,933 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2020-12-23 00:52:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:42,062 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-23 00:52:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:52:42,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 00:52:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:42,067 INFO L225 Difference]: With dead ends: 53 [2020-12-23 00:52:42,067 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:52:42,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 00:52:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:52:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-12-23 00:52:42,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:52:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-23 00:52:42,092 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-12-23 00:52:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:42,093 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-23 00:52:42,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:52:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-23 00:52:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:52:42,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:42,096 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:42,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:42,311 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash -483699617, now seen corresponding path program 2 times [2020-12-23 00:52:42,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:42,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737464757] [2020-12-23 00:52:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:42,326 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:42,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782085672] [2020-12-23 00:52:42,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:42,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:52:42,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:52:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:42,461 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 00:52:42,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737464757] [2020-12-23 00:52:42,462 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:42,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782085672] [2020-12-23 00:52:42,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:42,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:52:42,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960548667] [2020-12-23 00:52:42,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:52:42,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:42,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:52:42,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:42,466 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-12-23 00:52:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:42,523 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2020-12-23 00:52:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:52:42,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-23 00:52:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:42,525 INFO L225 Difference]: With dead ends: 58 [2020-12-23 00:52:42,525 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 00:52:42,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 00:52:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 00:52:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2020-12-23 00:52:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:52:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-23 00:52:42,534 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2020-12-23 00:52:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:42,534 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-23 00:52:42,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:52:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-23 00:52:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:52:42,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:42,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:42,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:42,751 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:42,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1009156328, now seen corresponding path program 1 times [2020-12-23 00:52:42,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:42,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614690849] [2020-12-23 00:52:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:42,768 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:42,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401514618] [2020-12-23 00:52:42,769 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 00:52:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:52:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:52:42,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614690849] [2020-12-23 00:52:42,951 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:42,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401514618] [2020-12-23 00:52:42,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:42,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:52:42,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253396403] [2020-12-23 00:52:42,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:52:42,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:42,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:52:42,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:52:42,958 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 6 states. [2020-12-23 00:52:43,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:43,072 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-12-23 00:52:43,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:52:43,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-23 00:52:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:43,073 INFO L225 Difference]: With dead ends: 65 [2020-12-23 00:52:43,074 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 00:52:43,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 00:52:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 00:52:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-12-23 00:52:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 00:52:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-12-23 00:52:43,083 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2020-12-23 00:52:43,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:43,084 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-12-23 00:52:43,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:52:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-12-23 00:52:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:52:43,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:43,085 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:43,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:43,298 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:43,300 INFO L82 PathProgramCache]: Analyzing trace with hash 923115154, now seen corresponding path program 2 times [2020-12-23 00:52:43,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:43,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797760907] [2020-12-23 00:52:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:43,313 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:43,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376642836] [2020-12-23 00:52:43,314 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 00:52:43,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:52:43,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:52:43,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:52:43,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797760907] [2020-12-23 00:52:43,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:43,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376642836] [2020-12-23 00:52:43,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:43,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:52:43,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445314390] [2020-12-23 00:52:43,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:52:43,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:43,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:52:43,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:52:43,534 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-12-23 00:52:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:43,667 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-12-23 00:52:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:52:43,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-23 00:52:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:43,676 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:52:43,676 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 00:52:43,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 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 00:52:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 00:52:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-12-23 00:52:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 00:52:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-12-23 00:52:43,696 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2020-12-23 00:52:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:43,696 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-12-23 00:52:43,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:52:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-12-23 00:52:43,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 00:52:43,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:43,697 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:43,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:43,903 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1541106392, now seen corresponding path program 3 times [2020-12-23 00:52:43,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:43,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838573883] [2020-12-23 00:52:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:43,921 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:43,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840237722] [2020-12-23 00:52:43,922 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 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 00:52:43,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:52:43,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:43,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:52:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 00:52:44,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838573883] [2020-12-23 00:52:44,133 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:44,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840237722] [2020-12-23 00:52:44,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:44,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:52:44,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024706495] [2020-12-23 00:52:44,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:52:44,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:52:44,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:52:44,139 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2020-12-23 00:52:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:44,271 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2020-12-23 00:52:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:52:44,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-12-23 00:52:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:44,276 INFO L225 Difference]: With dead ends: 124 [2020-12-23 00:52:44,276 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 00:52:44,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 00:52:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 00:52:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 51. [2020-12-23 00:52:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 00:52:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-12-23 00:52:44,294 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2020-12-23 00:52:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:44,295 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-12-23 00:52:44,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:52:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-12-23 00:52:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:52:44,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:44,297 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:44,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:44,513 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:44,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:44,514 INFO L82 PathProgramCache]: Analyzing trace with hash -57445772, now seen corresponding path program 4 times [2020-12-23 00:52:44,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:44,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348268368] [2020-12-23 00:52:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:44,528 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:44,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5045248] [2020-12-23 00:52:44,529 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 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 00:52:45,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:52:45,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:45,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:52:46,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-23 00:52:46,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348268368] [2020-12-23 00:52:46,117 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:46,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5045248] [2020-12-23 00:52:46,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:46,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:52:46,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582067303] [2020-12-23 00:52:46,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:52:46,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:46,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:52:46,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:52:46,120 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2020-12-23 00:52:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:46,238 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2020-12-23 00:52:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:52:46,238 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-12-23 00:52:46,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:46,239 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:52:46,240 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:52:46,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:52:46,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:52:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-12-23 00:52:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 00:52:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-12-23 00:52:46,253 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 38 [2020-12-23 00:52:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:46,254 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-12-23 00:52:46,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:52:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-12-23 00:52:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 00:52:46,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:46,255 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:46,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:52:46,478 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:46,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1601697520, now seen corresponding path program 5 times [2020-12-23 00:52:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:46,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546701217] [2020-12-23 00:52:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:46,493 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:46,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046826384] [2020-12-23 00:52:46,494 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 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