/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/copy-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:52:42,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:52:42,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:52:42,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:52:42,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:52:42,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:52:42,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:52:42,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:52:42,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:52:42,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:52:42,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:52:42,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:52:42,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:52:42,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:52:42,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:52:42,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:52:42,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:52:42,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:52:42,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:52:42,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:52:42,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:52:42,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:52:42,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:52:42,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:52:42,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:52:42,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:52:42,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:52:42,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:52:42,921 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 00:52:42,979 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:52:42,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:52:42,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:52:42,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:52:42,986 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:52:42,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:52:42,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:52:42,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:52:42,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:52:42,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:52:42,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:52:42,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:52:42,989 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:52:42,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:52:42,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:52:42,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:52:42,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:52:42,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:52:42,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:52:42,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:52:42,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:52:42,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:52:42,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:52:42,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:52:42,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:52:42,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:52:43,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:52:43,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:52:43,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:52:43,568 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:52:43,569 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:52:43,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-2-u.c [2020-12-23 00:52:43,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/79e39acd8/a008421683664c60b97b3e70b8cbe161/FLAG4ea24dd72 [2020-12-23 00:52:44,351 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:52:44,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-2-u.c [2020-12-23 00:52:44,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/79e39acd8/a008421683664c60b97b3e70b8cbe161/FLAG4ea24dd72 [2020-12-23 00:52:44,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/79e39acd8/a008421683664c60b97b3e70b8cbe161 [2020-12-23 00:52:44,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:52:44,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:52:44,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:52:44,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:52:44,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:52:44,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:52:44" (1/1) ... [2020-12-23 00:52:44,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7841ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:44, skipping insertion in model container [2020-12-23 00:52:44,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:52:44" (1/1) ... [2020-12-23 00:52:44,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:52:44,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:52:44,984 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/copy-2-u.c[320,333] 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[~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[~A~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 00:52:45,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:52:45,038 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:52:45,053 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/copy-2-u.c[320,333] 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[~#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[~#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: 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 00:52:45,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:52:45,084 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:52:45,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45 WrapperNode [2020-12-23 00:52:45,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:52:45,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:52:45,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:52:45,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:52:45,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (1/1) ... [2020-12-23 00:52:45,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (1/1) ... [2020-12-23 00:52:45,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:52:45,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:52:45,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:52:45,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:52:45,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (1/1) ... [2020-12-23 00:52:45,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (1/1) ... [2020-12-23 00:52:45,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (1/1) ... [2020-12-23 00:52:45,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (1/1) ... [2020-12-23 00:52:45,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (1/1) ... [2020-12-23 00:52:45,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (1/1) ... [2020-12-23 00:52:45,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (1/1) ... [2020-12-23 00:52:45,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:52:45,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:52:45,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:52:45,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:52:45,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (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 00:52:45,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:52:45,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:52:45,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:52:45,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:52:45,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:52:45,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:52:45,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:52:45,695 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:52:45,696 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 00:52:45,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:52:45 BoogieIcfgContainer [2020-12-23 00:52:45,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:52:45,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:52:45,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:52:45,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:52:45,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:52:44" (1/3) ... [2020-12-23 00:52:45,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67180fe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:52:45, skipping insertion in model container [2020-12-23 00:52:45,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:45" (2/3) ... [2020-12-23 00:52:45,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67180fe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:52:45, skipping insertion in model container [2020-12-23 00:52:45,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:52:45" (3/3) ... [2020-12-23 00:52:45,735 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-2-u.c [2020-12-23 00:52:45,747 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:52:45,756 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:52:45,787 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:52:45,825 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:52:45,826 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:52:45,826 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:52:45,826 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:52:45,826 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:52:45,827 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:52:45,827 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:52:45,827 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:52:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 00:52:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:52:45,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:45,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:45,857 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2020-12-23 00:52:45,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:45,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904097971] [2020-12-23 00:52:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:46,073 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:46,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537147311] [2020-12-23 00:52:46,074 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 00:52:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:52:46,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:46,302 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 00:52:46,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904097971] [2020-12-23 00:52:46,303 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:46,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537147311] [2020-12-23 00:52:46,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:46,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:52:46,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741363282] [2020-12-23 00:52:46,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:52:46,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:46,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:52:46,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:52:46,337 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-12-23 00:52:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:46,412 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2020-12-23 00:52:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:52:46,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:52:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:46,426 INFO L225 Difference]: With dead ends: 43 [2020-12-23 00:52:46,426 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 00:52:46,430 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 00:52:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 00:52:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-23 00:52:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:52:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2020-12-23 00:52:46,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2020-12-23 00:52:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:46,472 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2020-12-23 00:52:46,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:52:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2020-12-23 00:52:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:52:46,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:46,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:46,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:52:46,689 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:46,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:46,690 INFO L82 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2020-12-23 00:52:46,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:46,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570916363] [2020-12-23 00:52:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:46,715 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:46,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021500636] [2020-12-23 00:52:46,716 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 00:52:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:46,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:52:46,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:46,886 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 00:52:46,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570916363] [2020-12-23 00:52:46,887 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:46,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021500636] [2020-12-23 00:52:46,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:46,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:52:46,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782466504] [2020-12-23 00:52:46,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:52:46,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:46,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:52:46,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:46,895 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2020-12-23 00:52:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:47,023 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-12-23 00:52:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:52:47,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 00:52:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:47,028 INFO L225 Difference]: With dead ends: 43 [2020-12-23 00:52:47,029 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:52:47,030 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 00:52:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:52:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2020-12-23 00:52:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:52:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-23 00:52:47,052 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2020-12-23 00:52:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:47,053 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-23 00:52:47,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:52:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-23 00:52:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:52:47,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:47,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:47,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:47,271 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:47,273 INFO L82 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2020-12-23 00:52:47,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:47,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147363826] [2020-12-23 00:52:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:47,291 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:47,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570124275] [2020-12-23 00:52:47,293 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 00:52:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:52:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:47,405 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 00:52:47,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147363826] [2020-12-23 00:52:47,406 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:47,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570124275] [2020-12-23 00:52:47,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:47,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:52:47,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916195363] [2020-12-23 00:52:47,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:52:47,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:47,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:52:47,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:52:47,410 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2020-12-23 00:52:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:47,496 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-23 00:52:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:52:47,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 00:52:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:47,498 INFO L225 Difference]: With dead ends: 53 [2020-12-23 00:52:47,498 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:52:47,499 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 00:52:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:52:47,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-12-23 00:52:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:52:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-23 00:52:47,507 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-12-23 00:52:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:47,507 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-23 00:52:47,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:52:47,508 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-23 00:52:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:52:47,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:47,509 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:47,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:47,723 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash -483699617, now seen corresponding path program 2 times [2020-12-23 00:52:47,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:47,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405451298] [2020-12-23 00:52:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:47,738 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:47,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346267975] [2020-12-23 00:52:47,739 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 00:52:47,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:52:47,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:47,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:52:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:47,853 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 00:52:47,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405451298] [2020-12-23 00:52:47,854 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:47,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346267975] [2020-12-23 00:52:47,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:47,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:52:47,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628139488] [2020-12-23 00:52:47,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:52:47,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:47,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:52:47,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:47,857 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-12-23 00:52:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:47,914 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2020-12-23 00:52:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:52:47,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-23 00:52:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:47,916 INFO L225 Difference]: With dead ends: 58 [2020-12-23 00:52:47,916 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 00:52:47,917 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 00:52:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 00:52:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2020-12-23 00:52:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:52:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-23 00:52:47,925 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2020-12-23 00:52:47,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:47,925 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-23 00:52:47,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:52:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-23 00:52:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:52:47,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:47,927 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 00:52:48,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:48,141 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:48,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1009156328, now seen corresponding path program 1 times [2020-12-23 00:52:48,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:48,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302073631] [2020-12-23 00:52:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:48,155 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:48,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66528072] [2020-12-23 00:52:48,156 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 00:52:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:52:48,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:48,282 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 00:52:48,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302073631] [2020-12-23 00:52:48,282 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:48,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66528072] [2020-12-23 00:52:48,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:48,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:52:48,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125178407] [2020-12-23 00:52:48,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:52:48,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:48,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:52:48,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:52:48,285 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 6 states. [2020-12-23 00:52:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:48,359 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-12-23 00:52:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:52:48,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-23 00:52:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:48,361 INFO L225 Difference]: With dead ends: 65 [2020-12-23 00:52:48,361 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 00:52:48,362 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 00:52:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 00:52:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-12-23 00:52:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 00:52:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-12-23 00:52:48,369 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2020-12-23 00:52:48,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:48,370 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-12-23 00:52:48,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:52:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-12-23 00:52:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:52:48,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:48,371 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 00:52:48,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:48,586 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:48,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:48,587 INFO L82 PathProgramCache]: Analyzing trace with hash 923115154, now seen corresponding path program 2 times [2020-12-23 00:52:48,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:48,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343128973] [2020-12-23 00:52:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:48,600 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:48,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42215405] [2020-12-23 00:52:48,600 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 00:52:48,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:52:48,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:48,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:52:48,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:48,789 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 00:52:48,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343128973] [2020-12-23 00:52:48,790 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:48,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42215405] [2020-12-23 00:52:48,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:48,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:52:48,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369486649] [2020-12-23 00:52:48,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:52:48,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:48,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:52:48,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:52:48,797 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-12-23 00:52:48,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:48,918 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-12-23 00:52:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:52:48,920 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-23 00:52:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:48,924 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:52:48,924 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 00:52:48,926 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 00:52:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 00:52:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-12-23 00:52:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 00:52:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-12-23 00:52:48,946 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2020-12-23 00:52:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:48,947 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-12-23 00:52:48,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:52:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-12-23 00:52:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 00:52:48,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:48,949 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 00:52:49,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:49,151 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1541106392, now seen corresponding path program 3 times [2020-12-23 00:52:49,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:49,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029014267] [2020-12-23 00:52:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:49,168 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:49,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482632520] [2020-12-23 00:52:49,169 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 00:52:49,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:52:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:49,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:52:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:49,328 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 00:52:49,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029014267] [2020-12-23 00:52:49,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:49,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482632520] [2020-12-23 00:52:49,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:49,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:52:49,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465620027] [2020-12-23 00:52:49,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:52:49,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:52:49,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:52:49,332 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2020-12-23 00:52:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:49,417 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2020-12-23 00:52:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:52:49,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-12-23 00:52:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:49,421 INFO L225 Difference]: With dead ends: 124 [2020-12-23 00:52:49,421 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 00:52:49,423 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 00:52:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 00:52:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 51. [2020-12-23 00:52:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 00:52:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-12-23 00:52:49,451 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2020-12-23 00:52:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:49,453 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-12-23 00:52:49,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:52:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-12-23 00:52:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:52:49,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:49,455 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 00:52:49,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:49,670 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash -57445772, now seen corresponding path program 4 times [2020-12-23 00:52:49,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:49,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709901247] [2020-12-23 00:52:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:49,691 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:49,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223781271] [2020-12-23 00:52:49,692 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 00:52:49,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:52:49,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:49,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:52:49,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 00:52:49,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709901247] [2020-12-23 00:52:49,969 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:52:49,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223781271] [2020-12-23 00:52:49,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:52:49,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:52:49,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109651447] [2020-12-23 00:52:49,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:52:49,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:49,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:52:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:52:49,972 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 10 states. [2020-12-23 00:52:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:50,287 INFO L93 Difference]: Finished difference Result 168 states and 200 transitions. [2020-12-23 00:52:50,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:52:50,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-12-23 00:52:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:50,289 INFO L225 Difference]: With dead ends: 168 [2020-12-23 00:52:50,290 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 00:52:50,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:52:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 00:52:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 65. [2020-12-23 00:52:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:52:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-12-23 00:52:50,304 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 38 [2020-12-23 00:52:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:50,304 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-12-23 00:52:50,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:52:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-12-23 00:52:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 00:52:50,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:50,307 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:50,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:52:50,523 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1931323112, now seen corresponding path program 5 times [2020-12-23 00:52:50,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:50,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266217959] [2020-12-23 00:52:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:50,537 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:52:50,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520275675] [2020-12-23 00:52:50,537 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 [2020-12-23 00:53:02,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 00:53:02,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:02,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:53:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 81 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-12-23 00:53:02,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266217959] [2020-12-23 00:53:03,000 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:03,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520275675] [2020-12-23 00:53:03,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:03,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:53:03,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497650904] [2020-12-23 00:53:03,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:53:03,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:03,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:53:03,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:53:03,002 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 8 states. [2020-12-23 00:53:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:03,121 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2020-12-23 00:53:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:53:03,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-12-23 00:53:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:03,123 INFO L225 Difference]: With dead ends: 144 [2020-12-23 00:53:03,123 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 00:53:03,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 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 00:53:03,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 00:53:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2020-12-23 00:53:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 00:53:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-12-23 00:53:03,138 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 52 [2020-12-23 00:53:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:03,138 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-12-23 00:53:03,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:53:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-12-23 00:53:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:53:03,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:03,140 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:03,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:03,341 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:03,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:03,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2035130766, now seen corresponding path program 6 times [2020-12-23 00:53:03,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:03,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235671275] [2020-12-23 00:53:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:03,357 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:03,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994234277] [2020-12-23 00:53:03,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 00:53:04,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 00:53:04,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:53:04,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-23 00:53:04,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235671275] [2020-12-23 00:53:04,535 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:04,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994234277] [2020-12-23 00:53:04,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:04,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:53:04,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133692209] [2020-12-23 00:53:04,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:53:04,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:04,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:53:04,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:53:04,538 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 9 states. [2020-12-23 00:53:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:04,677 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2020-12-23 00:53:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:53:04,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-23 00:53:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:04,678 INFO L225 Difference]: With dead ends: 163 [2020-12-23 00:53:04,678 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:53:04,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:53:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:53:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-12-23 00:53:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:53:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-12-23 00:53:04,696 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 58 [2020-12-23 00:53:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:04,696 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-12-23 00:53:04,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:53:04,696 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-12-23 00:53:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 00:53:04,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:04,698 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:04,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:04,914 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:04,916 INFO L82 PathProgramCache]: Analyzing trace with hash 301106088, now seen corresponding path program 7 times [2020-12-23 00:53:04,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:04,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412931675] [2020-12-23 00:53:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:04,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:04,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151661131] [2020-12-23 00:53:04,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 00:53:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:05,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:53:05,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-12-23 00:53:05,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412931675] [2020-12-23 00:53:05,211 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:05,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151661131] [2020-12-23 00:53:05,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:05,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:53:05,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755121230] [2020-12-23 00:53:05,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:53:05,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:05,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:53:05,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:53:05,214 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 10 states. [2020-12-23 00:53:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:05,352 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2020-12-23 00:53:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:53:05,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-12-23 00:53:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:05,354 INFO L225 Difference]: With dead ends: 182 [2020-12-23 00:53:05,354 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 00:53:05,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:53:05,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 00:53:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2020-12-23 00:53:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:53:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2020-12-23 00:53:05,372 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 64 [2020-12-23 00:53:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:05,372 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2020-12-23 00:53:05,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:53:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2020-12-23 00:53:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 00:53:05,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:05,373 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:05,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:53:05,587 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:05,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:05,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1977547214, now seen corresponding path program 8 times [2020-12-23 00:53:05,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:05,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105259955] [2020-12-23 00:53:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:05,599 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:05,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069481062] [2020-12-23 00:53:05,600 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 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 00:53:05,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:53:05,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:53:05,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2020-12-23 00:53:05,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105259955] [2020-12-23 00:53:05,925 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:05,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069481062] [2020-12-23 00:53:05,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:05,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:53:05,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066022311] [2020-12-23 00:53:05,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:53:05,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:05,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:53:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:53:05,928 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 11 states. [2020-12-23 00:53:06,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:06,077 INFO L93 Difference]: Finished difference Result 201 states and 231 transitions. [2020-12-23 00:53:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:53:06,078 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-12-23 00:53:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:06,079 INFO L225 Difference]: With dead ends: 201 [2020-12-23 00:53:06,080 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 00:53:06,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:53:06,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 00:53:06,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2020-12-23 00:53:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 00:53:06,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-12-23 00:53:06,096 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 70 [2020-12-23 00:53:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:06,097 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-12-23 00:53:06,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:53:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-12-23 00:53:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 00:53:06,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:06,098 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:06,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:06,312 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash -630230936, now seen corresponding path program 9 times [2020-12-23 00:53:06,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:06,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338553408] [2020-12-23 00:53:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:06,333 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:06,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61471577] [2020-12-23 00:53:06,333 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 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 00:53:22,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:53:22,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:22,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:53:22,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 167 proven. 36 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-12-23 00:53:22,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338553408] [2020-12-23 00:53:22,707 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:22,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61471577] [2020-12-23 00:53:22,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:22,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:53:22,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688267310] [2020-12-23 00:53:22,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:53:22,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:53:22,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:53:22,710 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 12 states. [2020-12-23 00:53:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:22,870 INFO L93 Difference]: Finished difference Result 220 states and 251 transitions. [2020-12-23 00:53:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:53:22,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-12-23 00:53:22,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:22,871 INFO L225 Difference]: With dead ends: 220 [2020-12-23 00:53:22,872 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 00:53:22,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:53:22,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 00:53:22,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-12-23 00:53:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 00:53:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2020-12-23 00:53:22,912 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 76 [2020-12-23 00:53:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:22,913 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2020-12-23 00:53:22,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:53:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2020-12-23 00:53:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:53:22,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:22,915 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:23,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:53:23,116 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1972059634, now seen corresponding path program 10 times [2020-12-23 00:53:23,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:23,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411786738] [2020-12-23 00:53:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:23,127 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:23,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12990097] [2020-12-23 00:53:23,128 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 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 00:53:23,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:53:23,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:23,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:53:23,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 36 proven. 318 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2020-12-23 00:53:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411786738] [2020-12-23 00:53:23,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:23,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12990097] [2020-12-23 00:53:23,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:23,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 00:53:23,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717959873] [2020-12-23 00:53:23,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:53:23,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:23,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:53:23,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:53:23,529 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand 16 states. [2020-12-23 00:53:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:23,910 INFO L93 Difference]: Finished difference Result 371 states and 435 transitions. [2020-12-23 00:53:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 00:53:23,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2020-12-23 00:53:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:23,913 INFO L225 Difference]: With dead ends: 371 [2020-12-23 00:53:23,913 INFO L226 Difference]: Without dead ends: 300 [2020-12-23 00:53:23,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:53:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-23 00:53:23,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 134. [2020-12-23 00:53:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 00:53:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2020-12-23 00:53:23,932 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 82 [2020-12-23 00:53:23,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:23,932 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2020-12-23 00:53:23,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:53:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2020-12-23 00:53:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:53:23,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:23,934 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:24,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:24,149 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:24,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1215801900, now seen corresponding path program 11 times [2020-12-23 00:53:24,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:24,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628263801] [2020-12-23 00:53:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:24,164 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:24,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817138465] [2020-12-23 00:53:24,164 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 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