/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-fpi/eqn3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:11:28,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:11:28,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:11:28,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:11:28,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:11:28,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:11:28,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:11:28,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:11:28,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:11:28,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:11:28,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:11:28,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:11:28,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:11:28,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:11:28,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:11:28,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:11:28,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:11:28,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:11:28,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:11:28,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:11:28,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:11:28,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:11:28,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:11:28,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:11:28,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:11:28,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:11:28,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:11:28,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:11:28,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:11:28,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:11:28,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:11:28,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:11:28,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:11:28,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:11:28,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:11:28,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:11:28,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 11:11:29,037 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:11:29,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:11:29,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:11:29,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:11:29,042 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:11:29,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:11:29,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:11:29,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:11:29,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:11:29,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:11:29,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:11:29,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:11:29,043 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:11:29,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:11:29,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:11:29,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:11:29,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:11:29,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:11:29,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:11:29,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:11:29,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:11:29,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:11:29,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:11:29,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:11:29,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:11:29,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:11:29,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:11:29,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:11:29,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:11:29,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:11:29,502 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:11:29,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn3.c [2021-01-06 11:11:29,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/19524f88c/1df18bcb452d430ca666f692c4772d2f/FLAGfa5746796 [2021-01-06 11:11:30,192 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:11:30,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn3.c [2021-01-06 11:11:30,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/19524f88c/1df18bcb452d430ca666f692c4772d2f/FLAGfa5746796 [2021-01-06 11:11:30,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/19524f88c/1df18bcb452d430ca666f692c4772d2f [2021-01-06 11:11:30,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:11:30,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:11:30,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:11:30,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:11:30,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:11:30,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0b1250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30, skipping insertion in model container [2021-01-06 11:11:30,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:11:30,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:11:30,720 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-fpi/eqn3.c[587,600] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],StructAccessExpression[IdentifierExpression[~a~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],StructAccessExpression[IdentifierExpression[~b~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:11:30,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:11:30,756 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:11:30,771 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-fpi/eqn3.c[587,600] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],StructAccessExpression[IdentifierExpression[~a~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],StructAccessExpression[IdentifierExpression[~b~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:11:30,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:11:30,801 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:11:30,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30 WrapperNode [2021-01-06 11:11:30,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:11:30,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:11:30,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:11:30,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:11:30,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:11:30,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:11:30,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:11:30,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:11:30,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (1/1) ... [2021-01-06 11:11:30,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:11:30,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:11:30,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:11:30,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:11:30,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (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 [2021-01-06 11:11:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:11:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:11:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:11:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 11:11:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:11:31,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:11:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:11:31,509 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:11:31,510 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 11:11:31,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:11:31 BoogieIcfgContainer [2021-01-06 11:11:31,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:11:31,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:11:31,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:11:31,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:11:31,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:11:30" (1/3) ... [2021-01-06 11:11:31,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a9f285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:11:31, skipping insertion in model container [2021-01-06 11:11:31,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:11:30" (2/3) ... [2021-01-06 11:11:31,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a9f285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:11:31, skipping insertion in model container [2021-01-06 11:11:31,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:11:31" (3/3) ... [2021-01-06 11:11:31,572 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn3.c [2021-01-06 11:11:31,594 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:11:31,614 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:11:31,654 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:11:31,687 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:11:31,687 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:11:31,687 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:11:31,688 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:11:31,688 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:11:31,688 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:11:31,688 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:11:31,688 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:11:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 11:11:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 11:11:31,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:11:31,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:11:31,720 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:11:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:11:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-01-06 11:11:31,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:11:31,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335428016] [2021-01-06 11:11:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:11:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:11:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:11:32,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335428016] [2021-01-06 11:11:32,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:11:32,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:11:32,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38677563] [2021-01-06 11:11:32,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:11:32,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:11:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:11:32,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:11:32,045 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 11:11:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:11:32,065 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-01-06 11:11:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:11:32,066 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-06 11:11:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:11:32,076 INFO L225 Difference]: With dead ends: 38 [2021-01-06 11:11:32,076 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 11:11:32,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:11:32,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 11:11:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 11:11:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 11:11:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 11:11:32,126 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-01-06 11:11:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:11:32,126 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 11:11:32,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:11:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 11:11:32,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 11:11:32,128 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:11:32,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:11:32,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:11:32,131 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:11:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:11:32,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-01-06 11:11:32,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:11:32,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338577680] [2021-01-06 11:11:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:11:32,184 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:11:32,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553915597] [2021-01-06 11:11:32,185 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 [2021-01-06 11:11:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:11:32,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:11:32,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:11:32,504 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:32,505 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2021-01-06 11:11:32,510 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:32,543 INFO L625 ElimStorePlain]: treesize reduction 16, result has 64.4 percent of original size [2021-01-06 11:11:32,552 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:11:32,552 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:14 [2021-01-06 11:11:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:11:32,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338577680] [2021-01-06 11:11:32,634 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:11:32,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553915597] [2021-01-06 11:11:32,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:11:32,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 11:11:32,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513098007] [2021-01-06 11:11:32,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:11:32,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:11:32,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:11:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:11:32,639 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2021-01-06 11:11:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:11:32,904 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-01-06 11:11:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:11:32,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-01-06 11:11:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:11:32,906 INFO L225 Difference]: With dead ends: 39 [2021-01-06 11:11:32,906 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 11:11:32,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:11:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 11:11:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2021-01-06 11:11:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:11:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-01-06 11:11:32,916 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-01-06 11:11:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:11:32,917 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-01-06 11:11:32,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:11:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-01-06 11:11:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:11:32,918 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:11:32,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:11:33,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 11:11:33,133 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:11:33,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:11:33,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-01-06 11:11:33,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:11:33,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291970843] [2021-01-06 11:11:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:11:33,172 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:11:33,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277171403] [2021-01-06 11:11:33,173 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 [2021-01-06 11:11:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:11:33,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:11:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:11:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:11:33,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291970843] [2021-01-06 11:11:33,279 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:11:33,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277171403] [2021-01-06 11:11:33,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:11:33,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 11:11:33,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93865882] [2021-01-06 11:11:33,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:11:33,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:11:33,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:11:33,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:11:33,282 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2021-01-06 11:11:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:11:33,366 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-01-06 11:11:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:11:33,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 11:11:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:11:33,368 INFO L225 Difference]: With dead ends: 49 [2021-01-06 11:11:33,369 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 11:11:33,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:11:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 11:11:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-01-06 11:11:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:11:33,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 11:11:33,377 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-01-06 11:11:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:11:33,377 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 11:11:33,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:11:33,377 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 11:11:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:11:33,378 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:11:33,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:11:33,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:11:33,593 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:11:33,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:11:33,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-01-06 11:11:33,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:11:33,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179956227] [2021-01-06 11:11:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:11:33,641 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:11:33,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512542571] [2021-01-06 11:11:33,641 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 [2021-01-06 11:11:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:11:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:11:33,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:11:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:11:33,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179956227] [2021-01-06 11:11:33,753 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:11:33,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512542571] [2021-01-06 11:11:33,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:11:33,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 11:11:33,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666483196] [2021-01-06 11:11:33,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:11:33,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:11:33,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:11:33,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:11:33,756 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2021-01-06 11:11:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:11:33,834 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-01-06 11:11:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:11:33,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 11:11:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:11:33,836 INFO L225 Difference]: With dead ends: 44 [2021-01-06 11:11:33,836 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 11:11:33,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:11:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 11:11:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-01-06 11:11:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 11:11:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-06 11:11:33,843 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-01-06 11:11:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:11:33,843 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-06 11:11:33,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:11:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-06 11:11:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:11:33,844 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:11:33,844 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:11:34,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:11:34,058 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:11:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:11:34,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-01-06 11:11:34,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:11:34,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133716344] [2021-01-06 11:11:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:11:34,086 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:11:34,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641358058] [2021-01-06 11:11:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:11:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:11:34,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:11:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:11:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:11:34,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133716344] [2021-01-06 11:11:34,220 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:11:34,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641358058] [2021-01-06 11:11:34,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:11:34,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 11:11:34,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346961887] [2021-01-06 11:11:34,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:11:34,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:11:34,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:11:34,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:11:34,234 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2021-01-06 11:11:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:11:34,321 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-01-06 11:11:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:11:34,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-01-06 11:11:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:11:34,323 INFO L225 Difference]: With dead ends: 41 [2021-01-06 11:11:34,323 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 11:11:34,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:11:34,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 11:11:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-01-06 11:11:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 11:11:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-01-06 11:11:34,334 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-01-06 11:11:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:11:34,338 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-01-06 11:11:34,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:11:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-01-06 11:11:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:11:34,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:11:34,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:11:34,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:11:34,554 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:11:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:11:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-01-06 11:11:34,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:11:34,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759809653] [2021-01-06 11:11:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:11:34,574 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:11:34,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494075824] [2021-01-06 11:11:34,574 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 [2021-01-06 11:11:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:11:34,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 11:11:34,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:11:34,688 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:11:34,690 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:34,696 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:34,701 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-01-06 11:11:34,703 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:34,709 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:34,710 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:11:34,711 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-01-06 11:11:34,809 INFO L348 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2021-01-06 11:11:34,810 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2021-01-06 11:11:34,816 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:34,847 INFO L625 ElimStorePlain]: treesize reduction 25, result has 65.3 percent of original size [2021-01-06 11:11:34,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:34,855 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:11:34,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:47 [2021-01-06 11:11:34,859 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:34,888 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:34,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:34,940 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:35,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:35,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:35,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:35,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:35,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:35,132 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:35,133 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 95 [2021-01-06 11:11:35,138 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:35,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:35,227 INFO L348 Elim1Store]: treesize reduction 17, result has 83.7 percent of original size [2021-01-06 11:11:35,228 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 72 treesize of output 172 [2021-01-06 11:11:35,236 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:35,382 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43 [2021-01-06 11:11:35,383 INFO L625 ElimStorePlain]: treesize reduction 206, result has 39.9 percent of original size [2021-01-06 11:11:35,402 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2021-01-06 11:11:35,403 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:145, output treesize:137 [2021-01-06 11:11:36,076 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2021-01-06 11:11:36,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:36,088 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:11:36,090 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:11:36,092 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:36,096 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:11:36,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:36,100 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 11:11:36,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:11:36,123 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:11:36,124 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:36,129 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:11:36,131 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:11:36,135 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:11:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:11:36,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759809653] [2021-01-06 11:11:36,164 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:11:36,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494075824] [2021-01-06 11:11:36,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:11:36,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 11:11:36,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200644372] [2021-01-06 11:11:36,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:11:36,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:11:36,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:11:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:11:36,167 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 9 states. [2021-01-06 11:11:36,869 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-01-06 11:11:37,335 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-01-06 11:11:37,701 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2021-01-06 11:11:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:11:39,884 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-01-06 11:11:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:11:39,886 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 11:11:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:11:39,887 INFO L225 Difference]: With dead ends: 39 [2021-01-06 11:11:39,887 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 11:11:39,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:11:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 11:11:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-01-06 11:11:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 11:11:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 11:11:39,896 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2021-01-06 11:11:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:11:39,896 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 11:11:39,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:11:39,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 11:11:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:11:39,897 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:11:39,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:11:40,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 11:11:40,112 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:11:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:11:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 2 times [2021-01-06 11:11:40,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:11:40,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779510036] [2021-01-06 11:11:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:11:40,158 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:11:40,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440657498] [2021-01-06 11:11:40,158 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 [2021-01-06 11:11:40,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:11:40,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:11:40,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:11:40,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:11:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:11:40,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779510036] [2021-01-06 11:11:40,317 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:11:40,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440657498] [2021-01-06 11:11:40,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:11:40,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 11:11:40,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319179] [2021-01-06 11:11:40,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:11:40,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:11:40,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:11:40,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:11:40,320 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2021-01-06 11:11:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:11:40,483 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-01-06 11:11:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:11:40,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2021-01-06 11:11:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:11:40,485 INFO L225 Difference]: With dead ends: 61 [2021-01-06 11:11:40,485 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 11:11:40,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:11:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 11:11:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2021-01-06 11:11:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 11:11:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 11:11:40,494 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2021-01-06 11:11:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:11:40,494 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 11:11:40,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:11:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 11:11:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 11:11:40,495 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:11:40,496 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:11:40,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:11:40,712 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:11:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:11:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-01-06 11:11:40,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:11:40,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131199402] [2021-01-06 11:11:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:11:40,736 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:11:40,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815408874] [2021-01-06 11:11:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:11:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:11:40,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 11:11:40,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:11:40,867 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:11:40,870 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:40,880 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:40,892 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-01-06 11:11:40,893 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:40,903 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:40,904 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:11:40,904 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:22 [2021-01-06 11:11:40,981 INFO L348 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2021-01-06 11:11:40,981 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2021-01-06 11:11:40,984 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:41,021 INFO L625 ElimStorePlain]: treesize reduction 31, result has 58.7 percent of original size [2021-01-06 11:11:41,025 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:11:41,025 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:44 [2021-01-06 11:11:41,147 INFO L348 Elim1Store]: treesize reduction 39, result has 45.8 percent of original size [2021-01-06 11:11:41,148 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 85 [2021-01-06 11:11:41,152 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:41,205 INFO L625 ElimStorePlain]: treesize reduction 38, result has 61.6 percent of original size [2021-01-06 11:11:41,211 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:11:41,212 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:61 [2021-01-06 11:11:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:11:41,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131199402] [2021-01-06 11:11:41,499 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:11:41,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815408874] [2021-01-06 11:11:41,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:11:41,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 11:11:41,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850986289] [2021-01-06 11:11:41,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:11:41,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:11:41,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:11:41,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:11:41,502 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 10 states. [2021-01-06 11:11:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:11:42,348 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-01-06 11:11:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:11:42,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2021-01-06 11:11:42,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:11:42,350 INFO L225 Difference]: With dead ends: 42 [2021-01-06 11:11:42,350 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 11:11:42,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:11:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 11:11:42,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-01-06 11:11:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 11:11:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-01-06 11:11:42,359 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 20 [2021-01-06 11:11:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:11:42,359 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-01-06 11:11:42,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:11:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-01-06 11:11:42,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 11:11:42,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:11:42,360 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:11:42,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:11:42,574 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:11:42,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:11:42,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 2 times [2021-01-06 11:11:42,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:11:42,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615674570] [2021-01-06 11:11:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:11:42,602 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:11:42,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859449412] [2021-01-06 11:11:42,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:11:42,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:11:42,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:11:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:11:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:11:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:11:42,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615674570] [2021-01-06 11:11:42,764 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:11:42,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859449412] [2021-01-06 11:11:42,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:11:42,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 11:11:42,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974857244] [2021-01-06 11:11:42,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:11:42,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:11:42,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:11:42,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:11:42,775 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2021-01-06 11:11:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:11:42,947 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-01-06 11:11:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:11:42,948 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2021-01-06 11:11:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:11:42,949 INFO L225 Difference]: With dead ends: 62 [2021-01-06 11:11:42,949 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 11:11:42,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:11:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 11:11:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-01-06 11:11:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 11:11:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-01-06 11:11:42,957 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2021-01-06 11:11:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:11:42,958 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-01-06 11:11:42,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:11:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-01-06 11:11:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 11:11:42,959 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:11:42,959 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:11:43,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 11:11:43,174 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:11:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:11:43,175 INFO L82 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 3 times [2021-01-06 11:11:43,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:11:43,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195578801] [2021-01-06 11:11:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:11:43,208 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:11:43,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051748674] [2021-01-06 11:11:43,209 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 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 [2021-01-06 11:11:43,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 11:11:43,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:11:43,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 11:11:43,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:11:43,367 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:11:43,369 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:43,386 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:43,395 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-01-06 11:11:43,396 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:43,424 INFO L625 ElimStorePlain]: treesize reduction 4, result has 87.1 percent of original size [2021-01-06 11:11:43,425 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:11:43,425 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:48, output treesize:27 [2021-01-06 11:11:43,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:43,461 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:43,462 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2021-01-06 11:11:43,465 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:43,498 INFO L625 ElimStorePlain]: treesize reduction 20, result has 67.2 percent of original size [2021-01-06 11:11:43,500 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:11:43,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:41 [2021-01-06 11:11:43,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:43,722 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-01-06 11:11:43,723 INFO L348 Elim1Store]: treesize reduction 86, result has 61.3 percent of original size [2021-01-06 11:11:43,724 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 160 [2021-01-06 11:11:43,731 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:43,798 INFO L625 ElimStorePlain]: treesize reduction 52, result has 55.6 percent of original size [2021-01-06 11:11:43,800 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:11:43,800 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:65 [2021-01-06 11:11:43,847 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:11:44,024 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-01-06 11:11:44,030 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:44,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:44,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:44,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:44,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:44,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:44,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:44,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:44,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:44,322 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 67 [2021-01-06 11:11:44,327 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:44,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:44,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:44,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:44,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:44,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:44,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:44,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:44,501 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-01-06 11:11:44,502 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:44,502 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 19 case distinctions, treesize of input 81 treesize of output 314 [2021-01-06 11:11:44,509 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 3, 2, 1] term [2021-01-06 11:11:44,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:11:44,511 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 3, 2, 1] term [2021-01-06 11:11:44,511 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:11:44,513 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 3, 2, 1] term [2021-01-06 11:11:44,513 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 11:11:44,514 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2021-01-06 11:11:44,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:11:44,516 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2021-01-06 11:11:44,516 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:44,517 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 1] term [2021-01-06 11:11:44,518 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:11:44,518 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2021-01-06 11:11:44,519 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 11:11:44,537 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:44,797 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2021-01-06 11:11:44,798 INFO L625 ElimStorePlain]: treesize reduction 472, result has 28.7 percent of original size [2021-01-06 11:11:44,801 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-01-06 11:11:44,802 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:182, output treesize:190 [2021-01-06 11:11:44,959 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 9, 1] term [2021-01-06 11:11:44,960 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:45,120 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 9, 1] term [2021-01-06 11:11:45,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:45,132 INFO L443 ElimStorePlain]: Different costs {50=[v_prenex_8], 70=[|v_#memory_int_21|]} [2021-01-06 11:11:45,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:45,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:45,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:45,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:45,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:45,487 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-01-06 11:11:45,488 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:45,489 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 88 treesize of output 424 [2021-01-06 11:11:45,497 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[11, 3, 2, 1] term [2021-01-06 11:11:45,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2021-01-06 11:11:45,499 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[10, 3, 2, 1] term [2021-01-06 11:11:45,499 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 11:11:45,500 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2021-01-06 11:11:45,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 11:11:45,502 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 3, 2, 1] term [2021-01-06 11:11:45,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:11:45,503 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 3, 2, 1] term [2021-01-06 11:11:45,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:11:45,504 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 3, 2, 1] term [2021-01-06 11:11:45,504 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 11:11:45,505 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2021-01-06 11:11:45,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:11:45,506 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2021-01-06 11:11:45,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:45,507 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 1] term [2021-01-06 11:11:45,507 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2021-01-06 11:11:45,508 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2021-01-06 11:11:45,508 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 11:11:45,522 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:46,080 WARN L197 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 76 [2021-01-06 11:11:46,081 INFO L625 ElimStorePlain]: treesize reduction 670, result has 22.5 percent of original size [2021-01-06 11:11:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:46,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:46,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:46,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:46,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:11:46,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:11:46,708 WARN L197 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-01-06 11:11:46,709 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:11:46,710 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 90 treesize of output 640 [2021-01-06 11:11:46,726 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[14, 3, 2, 1] term [2021-01-06 11:11:46,726 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2021-01-06 11:11:46,728 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[13, 3, 2, 1] term [2021-01-06 11:11:46,728 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2021-01-06 11:11:46,730 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[12, 3, 2, 1] term [2021-01-06 11:11:46,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2021-01-06 11:11:46,732 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[11, 3, 2, 1] term [2021-01-06 11:11:46,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2021-01-06 11:11:46,733 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[10, 3, 2, 1] term [2021-01-06 11:11:46,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 11:11:46,735 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2021-01-06 11:11:46,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 11:11:46,737 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 3, 2, 1] term [2021-01-06 11:11:46,737 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:11:46,738 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 3, 2, 1] term [2021-01-06 11:11:46,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:11:46,739 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 3, 1] term [2021-01-06 11:11:46,740 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2021-01-06 11:11:46,741 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 1] term [2021-01-06 11:11:46,741 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2021-01-06 11:11:46,742 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 1] term [2021-01-06 11:11:46,742 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2021-01-06 11:11:46,743 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 1] term [2021-01-06 11:11:46,743 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2021-01-06 11:11:46,744 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2021-01-06 11:11:46,744 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 11:11:46,800 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:11:47,329 WARN L197 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 66 [2021-01-06 11:11:47,330 INFO L625 ElimStorePlain]: treesize reduction 489, result has 28.1 percent of original size [2021-01-06 11:11:47,341 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-01-06 11:11:47,341 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:202, output treesize:191 [2021-01-06 11:11:47,538 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:47,541 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:47,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:11:47,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:47,553 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:11:49,840 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 11:11:49,854 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2021-01-06 11:11:50,231 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2021-01-06 11:11:50,652 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-01-06 11:11:51,292 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-01-06 11:11:56,722 WARN L197 SmtUtils]: Spent 4.74 s on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2021-01-06 11:11:56,735 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2021-01-06 11:11:56,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:59,387 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2021-01-06 11:11:59,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:59,402 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:59,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:59,410 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:11:59,419 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 11:11:59,444 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:11:59,448 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:11:59,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 11:11:59,458 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:11:59,474 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2021-01-06 11:11:59,474 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:11:59,481 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:59,484 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:11:59,485 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:11:59,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 11:11:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:11:59,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195578801] [2021-01-06 11:11:59,577 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:11:59,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051748674] [2021-01-06 11:11:59,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:11:59,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-01-06 11:11:59,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613053866] [2021-01-06 11:11:59,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:11:59,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:11:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:11:59,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=342, Unknown=1, NotChecked=0, Total=420 [2021-01-06 11:11:59,580 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 21 states. [2021-01-06 11:12:00,127 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-01-06 11:12:00,500 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-01-06 11:12:01,321 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-01-06 11:12:02,544 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-01-06 11:12:02,854 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-01-06 11:12:05,395 WARN L197 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 132 DAG size of output: 49 [2021-01-06 11:12:07,682 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-01-06 11:12:10,177 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2021-01-06 11:12:18,633 WARN L197 SmtUtils]: Spent 8.21 s on a formula simplification. DAG size of input: 144 DAG size of output: 109 [2021-01-06 11:12:21,592 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 121 [2021-01-06 11:12:24,731 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 121 [2021-01-06 11:12:25,555 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 62 [2021-01-06 11:12:27,883 WARN L197 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 63 [2021-01-06 11:12:29,993 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 87 [2021-01-06 11:12:47,684 WARN L197 SmtUtils]: Spent 11.17 s on a formula simplification. DAG size of input: 146 DAG size of output: 111 [2021-01-06 11:12:49,679 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 119 [2021-01-06 11:12:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:49,840 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-01-06 11:12:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 11:12:49,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2021-01-06 11:12:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:49,845 INFO L225 Difference]: With dead ends: 59 [2021-01-06 11:12:49,845 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 11:12:49,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 55.4s TimeCoverageRelationStatistics Valid=285, Invalid=1351, Unknown=4, NotChecked=0, Total=1640 [2021-01-06 11:12:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 11:12:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2021-01-06 11:12:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 11:12:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-01-06 11:12:49,861 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 28 [2021-01-06 11:12:49,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:49,861 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-01-06 11:12:49,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:12:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-01-06 11:12:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 11:12:49,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:49,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:12:50,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:12:50,065 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:50,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:50,066 INFO L82 PathProgramCache]: Analyzing trace with hash 711279424, now seen corresponding path program 4 times [2021-01-06 11:12:50,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:50,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788836027] [2021-01-06 11:12:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:50,096 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:12:50,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843867088] [2021-01-06 11:12:50,098 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 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 [2021-01-06 11:12:50,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:12:50,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:12:50,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:12:50,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:12:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 11:12:50,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788836027] [2021-01-06 11:12:50,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:12:50,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843867088] [2021-01-06 11:12:50,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:12:50,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 11:12:50,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228692421] [2021-01-06 11:12:50,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:12:50,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:12:50,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:12:50,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:12:50,304 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 9 states. [2021-01-06 11:12:50,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:50,566 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-01-06 11:12:50,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:12:50,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2021-01-06 11:12:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:50,569 INFO L225 Difference]: With dead ends: 87 [2021-01-06 11:12:50,569 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 11:12:50,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:12:50,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 11:12:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2021-01-06 11:12:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 11:12:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-01-06 11:12:50,582 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 30 [2021-01-06 11:12:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:50,583 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-01-06 11:12:50,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:12:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-01-06 11:12:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 11:12:50,584 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:50,584 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:12:50,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:12:50,807 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:50,808 INFO L82 PathProgramCache]: Analyzing trace with hash 481747840, now seen corresponding path program 5 times [2021-01-06 11:12:50,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:50,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043474699] [2021-01-06 11:12:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:50,839 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:12:50,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186529672] [2021-01-06 11:12:50,840 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 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 [2021-01-06 11:12:50,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 11:12:50,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:12:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:12:50,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:12:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 11:12:51,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043474699] [2021-01-06 11:12:51,090 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:12:51,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186529672] [2021-01-06 11:12:51,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:12:51,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 11:12:51,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131770251] [2021-01-06 11:12:51,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:12:51,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:12:51,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:12:51,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:12:51,093 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 9 states. [2021-01-06 11:12:51,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:51,359 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-01-06 11:12:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:12:51,361 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2021-01-06 11:12:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:51,362 INFO L225 Difference]: With dead ends: 78 [2021-01-06 11:12:51,362 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 11:12:51,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:12:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 11:12:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 44. [2021-01-06 11:12:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 11:12:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-01-06 11:12:51,375 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 30 [2021-01-06 11:12:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:51,376 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-01-06 11:12:51,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:12:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-01-06 11:12:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 11:12:51,377 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:51,377 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:12:51,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 11:12:51,591 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:51,592 INFO L82 PathProgramCache]: Analyzing trace with hash -412561416, now seen corresponding path program 6 times [2021-01-06 11:12:51,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:51,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164051892] [2021-01-06 11:12:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:51,608 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:12:51,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155386366] [2021-01-06 11:12:51,608 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 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 [2021-01-06 11:12:51,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 11:12:51,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:12:51,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:12:51,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:12:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 11:12:51,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164051892] [2021-01-06 11:12:51,912 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:12:51,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155386366] [2021-01-06 11:12:51,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:12:51,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 11:12:51,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687060949] [2021-01-06 11:12:51,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:12:51,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:12:51,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:12:51,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:12:51,914 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 10 states. [2021-01-06 11:12:52,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:52,181 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-01-06 11:12:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:12:52,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2021-01-06 11:12:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:52,185 INFO L225 Difference]: With dead ends: 69 [2021-01-06 11:12:52,186 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 11:12:52,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:12:52,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 11:12:52,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-01-06 11:12:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 11:12:52,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-01-06 11:12:52,205 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 32 [2021-01-06 11:12:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:52,205 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-01-06 11:12:52,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:12:52,206 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-01-06 11:12:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 11:12:52,209 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:52,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:12:52,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 11:12:52,413 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 7 times [2021-01-06 11:12:52,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:52,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468108585] [2021-01-06 11:12:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:52,431 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:12:52,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463267561] [2021-01-06 11:12:52,431 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 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 [2021-01-06 11:12:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:12:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 11:12:52,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:12:52,577 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:12:52,579 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:52,598 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:52,605 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-01-06 11:12:52,607 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:52,637 INFO L625 ElimStorePlain]: treesize reduction 4, result has 85.7 percent of original size [2021-01-06 11:12:52,638 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:52,638 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-01-06 11:12:52,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:52,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:52,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:52,699 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-01-06 11:12:52,700 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-01-06 11:12:52,702 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:52,749 INFO L625 ElimStorePlain]: treesize reduction 20, result has 69.7 percent of original size [2021-01-06 11:12:52,751 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:52,751 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-01-06 11:12:52,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:52,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:52,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:52,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:52,859 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:52,860 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 71 [2021-01-06 11:12:52,863 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:52,917 INFO L625 ElimStorePlain]: treesize reduction 22, result has 75.8 percent of original size [2021-01-06 11:12:52,919 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:52,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:69 [2021-01-06 11:12:53,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,058 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:53,059 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 97 [2021-01-06 11:12:53,062 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:53,139 INFO L625 ElimStorePlain]: treesize reduction 38, result has 67.8 percent of original size [2021-01-06 11:12:53,144 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:12:53,144 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:84, output treesize:80 [2021-01-06 11:12:53,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:53,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:53,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:53,453 INFO L348 Elim1Store]: treesize reduction 24, result has 71.1 percent of original size [2021-01-06 11:12:53,453 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 106 treesize of output 163 [2021-01-06 11:12:53,462 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:53,578 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-01-06 11:12:53,579 INFO L625 ElimStorePlain]: treesize reduction 56, result has 67.3 percent of original size [2021-01-06 11:12:53,581 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:12:53,582 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:118, output treesize:115 [2021-01-06 11:12:53,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:53,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:53,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:53,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:53,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:54,031 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-01-06 11:12:54,032 INFO L348 Elim1Store]: treesize reduction 24, result has 84.2 percent of original size [2021-01-06 11:12:54,033 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 9 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 38 case distinctions, treesize of input 121 treesize of output 234 [2021-01-06 11:12:54,043 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:54,214 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-01-06 11:12:54,214 INFO L625 ElimStorePlain]: treesize reduction 183, result has 44.9 percent of original size [2021-01-06 11:12:54,216 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:12:54,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:133, output treesize:149 [2021-01-06 11:12:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:54,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:54,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:54,799 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-01-06 11:12:54,800 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:54,800 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 148 treesize of output 422 [2021-01-06 11:12:54,810 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 3, 2, 1] term [2021-01-06 11:12:54,811 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:12:54,812 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 3, 2, 1] term [2021-01-06 11:12:54,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:12:54,813 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 3, 2, 1] term [2021-01-06 11:12:54,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 11:12:54,814 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 1] term [2021-01-06 11:12:54,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:12:54,815 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 1] term [2021-01-06 11:12:54,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:12:54,816 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 1] term [2021-01-06 11:12:54,816 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2021-01-06 11:12:54,816 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2021-01-06 11:12:54,817 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 11:12:54,825 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:54,988 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2021-01-06 11:12:54,989 INFO L625 ElimStorePlain]: treesize reduction 151, result has 41.0 percent of original size [2021-01-06 11:12:54,993 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:12:54,993 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:157, output treesize:105 [2021-01-06 11:12:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:12:55,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468108585] [2021-01-06 11:12:55,791 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:12:55,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463267561] [2021-01-06 11:12:55,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:12:55,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 11:12:55,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040628785] [2021-01-06 11:12:55,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:12:55,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:12:55,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:12:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:12:55,794 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 19 states. [2021-01-06 11:12:57,248 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-01-06 11:12:58,032 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-01-06 11:12:58,542 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2021-01-06 11:12:59,065 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2021-01-06 11:12:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:59,200 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-01-06 11:12:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 11:12:59,201 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2021-01-06 11:12:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:59,203 INFO L225 Difference]: With dead ends: 42 [2021-01-06 11:12:59,203 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 11:12:59,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:12:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 11:12:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-01-06 11:12:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 11:12:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-01-06 11:12:59,216 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2021-01-06 11:12:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:59,216 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-01-06 11:12:59,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:12:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-01-06 11:12:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:12:59,217 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:59,218 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:12:59,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:12:59,432 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:59,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:59,434 INFO L82 PathProgramCache]: Analyzing trace with hash -831401164, now seen corresponding path program 8 times [2021-01-06 11:12:59,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:59,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591372418] [2021-01-06 11:12:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:59,449 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:12:59,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122903621] [2021-01-06 11:12:59,450 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 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 [2021-01-06 11:12:59,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:12:59,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:12:59,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 11:12:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:12:59,576 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:12:59,578 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:59,596 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:59,603 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-01-06 11:12:59,605 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:59,636 INFO L625 ElimStorePlain]: treesize reduction 4, result has 85.7 percent of original size [2021-01-06 11:12:59,637 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:59,638 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-01-06 11:12:59,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:12:59,691 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-01-06 11:12:59,692 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-01-06 11:12:59,695 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:59,742 INFO L625 ElimStorePlain]: treesize reduction 20, result has 67.2 percent of original size [2021-01-06 11:12:59,747 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:59,747 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:41 [2021-01-06 11:12:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,828 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:59,828 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 59 [2021-01-06 11:12:59,831 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:59,882 INFO L625 ElimStorePlain]: treesize reduction 4, result has 94.1 percent of original size [2021-01-06 11:12:59,883 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:59,884 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-01-06 11:12:59,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:12:59,996 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:59,997 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 76 [2021-01-06 11:13:00,000 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:00,078 INFO L625 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-01-06 11:13:00,079 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:00,080 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:91, output treesize:92 [2021-01-06 11:13:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:00,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:00,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,433 INFO L348 Elim1Store]: treesize reduction 24, result has 64.7 percent of original size [2021-01-06 11:13:00,434 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 101 treesize of output 134 [2021-01-06 11:13:00,437 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:00,542 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-01-06 11:13:00,543 INFO L625 ElimStorePlain]: treesize reduction 89, result has 58.0 percent of original size [2021-01-06 11:13:00,545 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:00,545 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:113, output treesize:123 [2021-01-06 11:13:00,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:00,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:00,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:00,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:00,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:00,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:00,851 INFO L348 Elim1Store]: treesize reduction 16, result has 76.5 percent of original size [2021-01-06 11:13:00,851 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 147 treesize of output 164 [2021-01-06 11:13:00,856 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:00,965 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-01-06 11:13:00,967 INFO L625 ElimStorePlain]: treesize reduction 49, result has 69.9 percent of original size [2021-01-06 11:13:00,968 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:00,968 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:159, output treesize:114 [2021-01-06 11:13:01,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:01,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:01,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:01,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:01,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:01,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:01,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:01,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:01,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:01,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:01,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:01,229 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:01,230 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 96 treesize of output 133 [2021-01-06 11:13:01,235 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:01,343 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-01-06 11:13:01,343 INFO L625 ElimStorePlain]: treesize reduction 48, result has 71.8 percent of original size [2021-01-06 11:13:01,345 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:01,346 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:102, output treesize:122 [2021-01-06 11:13:02,178 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-01-06 11:13:02,540 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:13:02,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:13:02,548 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:13:02,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 11:13:02,557 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2021-01-06 11:13:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:13:02,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591372418] [2021-01-06 11:13:02,660 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:13:02,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122903621] [2021-01-06 11:13:02,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:13:02,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-01-06 11:13:02,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866398640] [2021-01-06 11:13:02,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 11:13:02,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:13:02,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 11:13:02,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:13:02,663 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 24 states. [2021-01-06 11:13:03,250 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-01-06 11:13:03,461 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-01-06 11:13:03,723 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-01-06 11:13:03,922 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-01-06 11:13:04,187 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-01-06 11:13:04,521 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-01-06 11:13:04,818 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2021-01-06 11:13:05,053 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-01-06 11:13:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:13:05,077 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-01-06 11:13:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 11:13:05,078 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2021-01-06 11:13:05,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:13:05,079 INFO L225 Difference]: With dead ends: 67 [2021-01-06 11:13:05,079 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 11:13:05,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:13:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 11:13:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 11:13:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 11:13:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-01-06 11:13:05,093 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2021-01-06 11:13:05,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:13:05,093 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-01-06 11:13:05,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 11:13:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-01-06 11:13:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 11:13:05,094 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:13:05,094 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:13:05,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:13:05,309 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:13:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:13:05,310 INFO L82 PathProgramCache]: Analyzing trace with hash -981804622, now seen corresponding path program 9 times [2021-01-06 11:13:05,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:13:05,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680460032] [2021-01-06 11:13:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:13:05,326 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:13:05,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921666998] [2021-01-06 11:13:05,327 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 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 [2021-01-06 11:13:05,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 11:13:05,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:13:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:13:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:13:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 11:13:05,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680460032] [2021-01-06 11:13:05,668 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:13:05,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921666998] [2021-01-06 11:13:05,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:13:05,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 11:13:05,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339819659] [2021-01-06 11:13:05,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:13:05,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:13:05,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:13:05,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:13:05,669 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2021-01-06 11:13:05,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:13:05,969 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2021-01-06 11:13:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:13:05,970 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2021-01-06 11:13:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:13:05,971 INFO L225 Difference]: With dead ends: 67 [2021-01-06 11:13:05,971 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 11:13:05,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:13:05,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 11:13:05,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-01-06 11:13:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 11:13:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-01-06 11:13:05,983 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2021-01-06 11:13:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:13:05,983 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-01-06 11:13:05,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:13:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-01-06 11:13:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 11:13:05,984 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:13:05,985 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:13:06,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 11:13:06,199 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:13:06,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:13:06,200 INFO L82 PathProgramCache]: Analyzing trace with hash -835467152, now seen corresponding path program 10 times [2021-01-06 11:13:06,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:13:06,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028958016] [2021-01-06 11:13:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:13:06,217 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:13:06,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570528981] [2021-01-06 11:13:06,217 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:13:06,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:13:06,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:13:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 11:13:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:13:06,306 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:13:06,308 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:06,323 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:06,332 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-01-06 11:13:06,333 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:06,348 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:06,350 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:06,351 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:25 [2021-01-06 11:13:06,446 INFO L348 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2021-01-06 11:13:06,447 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2021-01-06 11:13:06,449 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:06,506 INFO L625 ElimStorePlain]: treesize reduction 31, result has 60.3 percent of original size [2021-01-06 11:13:06,507 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:06,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2021-01-06 11:13:06,684 INFO L348 Elim1Store]: treesize reduction 126, result has 31.5 percent of original size [2021-01-06 11:13:06,684 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 89 [2021-01-06 11:13:06,686 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:06,754 INFO L625 ElimStorePlain]: treesize reduction 31, result has 69.3 percent of original size [2021-01-06 11:13:06,755 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:06,756 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:70 [2021-01-06 11:13:07,052 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-01-06 11:13:07,054 INFO L348 Elim1Store]: treesize reduction 116, result has 52.5 percent of original size [2021-01-06 11:13:07,055 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 164 [2021-01-06 11:13:07,060 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:07,161 INFO L625 ElimStorePlain]: treesize reduction 97, result has 40.1 percent of original size [2021-01-06 11:13:07,163 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:07,163 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:83, output treesize:65 [2021-01-06 11:13:07,593 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2021-01-06 11:13:07,594 INFO L348 Elim1Store]: treesize reduction 165, result has 50.6 percent of original size [2021-01-06 11:13:07,594 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 206 [2021-01-06 11:13:07,600 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:07,725 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-01-06 11:13:07,725 INFO L625 ElimStorePlain]: treesize reduction 130, result has 36.3 percent of original size [2021-01-06 11:13:07,727 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:07,728 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:86, output treesize:74 [2021-01-06 11:13:07,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:07,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:08,302 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 79 [2021-01-06 11:13:08,303 INFO L348 Elim1Store]: treesize reduction 83, result has 71.3 percent of original size [2021-01-06 11:13:08,304 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 99 treesize of output 320 [2021-01-06 11:13:08,312 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:08,499 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2021-01-06 11:13:08,500 INFO L625 ElimStorePlain]: treesize reduction 315, result has 28.1 percent of original size [2021-01-06 11:13:08,502 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:08,502 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:112, output treesize:123 [2021-01-06 11:13:08,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:08,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:08,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:09,246 WARN L197 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 106 [2021-01-06 11:13:09,248 INFO L348 Elim1Store]: treesize reduction 101, result has 74.8 percent of original size [2021-01-06 11:13:09,248 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 147 treesize of output 444 [2021-01-06 11:13:09,259 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:09,510 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 57 [2021-01-06 11:13:09,511 INFO L625 ElimStorePlain]: treesize reduction 546, result has 18.3 percent of original size [2021-01-06 11:13:09,514 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:09,514 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:160, output treesize:122 [2021-01-06 11:13:09,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:09,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:09,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:09,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,152 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 79 [2021-01-06 11:13:10,154 INFO L348 Elim1Store]: treesize reduction 83, result has 71.3 percent of original size [2021-01-06 11:13:10,155 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 7 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 131 treesize of output 346 [2021-01-06 11:13:10,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:10,402 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 64 [2021-01-06 11:13:10,403 INFO L625 ElimStorePlain]: treesize reduction 373, result has 32.4 percent of original size [2021-01-06 11:13:10,406 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:10,406 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:144, output treesize:179 [2021-01-06 11:13:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:10,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:11,124 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 88 [2021-01-06 11:13:11,125 INFO L348 Elim1Store]: treesize reduction 83, result has 72.7 percent of original size [2021-01-06 11:13:11,126 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 22 case distinctions, treesize of input 178 treesize of output 388 [2021-01-06 11:13:11,139 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:11,386 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 66 [2021-01-06 11:13:11,387 INFO L625 ElimStorePlain]: treesize reduction 303, result has 30.8 percent of original size [2021-01-06 11:13:11,392 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:11,393 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:191, output treesize:135 [2021-01-06 11:13:12,267 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-01-06 11:13:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:13:15,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028958016] [2021-01-06 11:13:15,374 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:13:15,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570528981] [2021-01-06 11:13:15,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:13:15,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-01-06 11:13:15,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296552646] [2021-01-06 11:13:15,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 11:13:15,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:13:15,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 11:13:15,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=475, Unknown=1, NotChecked=0, Total=552 [2021-01-06 11:13:15,376 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 24 states. [2021-01-06 11:13:16,416 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2021-01-06 11:13:16,801 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-01-06 11:13:19,222 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2021-01-06 11:13:19,693 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-01-06 11:13:21,203 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2021-01-06 11:13:21,825 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2021-01-06 11:13:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:13:24,497 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-01-06 11:13:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 11:13:24,499 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 40 [2021-01-06 11:13:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:13:24,499 INFO L225 Difference]: With dead ends: 50 [2021-01-06 11:13:24,499 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 11:13:24,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=137, Invalid=853, Unknown=2, NotChecked=0, Total=992 [2021-01-06 11:13:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 11:13:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-01-06 11:13:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 11:13:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-01-06 11:13:24,511 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2021-01-06 11:13:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:13:24,512 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-01-06 11:13:24,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 11:13:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-01-06 11:13:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 11:13:24,513 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:13:24,513 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:13:24,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 11:13:24,725 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:13:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:13:24,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1910132122, now seen corresponding path program 11 times [2021-01-06 11:13:24,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:13:24,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793760990] [2021-01-06 11:13:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:13:24,761 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:13:24,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893960760] [2021-01-06 11:13:24,762 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:13:24,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 11:13:24,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:13:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 11:13:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:13:24,967 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:13:24,969 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:24,991 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:24,998 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-01-06 11:13:25,002 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:25,040 INFO L625 ElimStorePlain]: treesize reduction 4, result has 85.7 percent of original size [2021-01-06 11:13:25,042 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:25,042 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-01-06 11:13:25,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:25,103 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-01-06 11:13:25,103 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-01-06 11:13:25,106 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:25,154 INFO L625 ElimStorePlain]: treesize reduction 16, result has 68.6 percent of original size [2021-01-06 11:13:25,155 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:25,156 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:35 [2021-01-06 11:13:25,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,235 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:25,236 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 57 [2021-01-06 11:13:25,238 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:25,301 INFO L625 ElimStorePlain]: treesize reduction 4, result has 93.4 percent of original size [2021-01-06 11:13:25,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:25,303 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:57 [2021-01-06 11:13:25,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,431 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:25,431 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 83 [2021-01-06 11:13:25,434 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:25,507 INFO L625 ElimStorePlain]: treesize reduction 34, result has 69.6 percent of original size [2021-01-06 11:13:25,508 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:25,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:78 [2021-01-06 11:13:25,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:25,696 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:25,696 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 84 treesize of output 109 [2021-01-06 11:13:25,700 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:25,807 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-01-06 11:13:25,808 INFO L625 ElimStorePlain]: treesize reduction 29, result has 75.4 percent of original size [2021-01-06 11:13:25,810 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:25,810 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:93, output treesize:89 [2021-01-06 11:13:26,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:26,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,215 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-01-06 11:13:26,216 INFO L348 Elim1Store]: treesize reduction 24, result has 71.1 percent of original size [2021-01-06 11:13:26,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 14 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 37 case distinctions, treesize of input 115 treesize of output 175 [2021-01-06 11:13:26,222 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:26,378 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-01-06 11:13:26,379 INFO L625 ElimStorePlain]: treesize reduction 114, result has 52.9 percent of original size [2021-01-06 11:13:26,381 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:26,381 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:127, output treesize:128 [2021-01-06 11:13:26,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:26,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:26,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:26,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:26,832 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-01-06 11:13:26,833 INFO L348 Elim1Store]: treesize reduction 24, result has 73.6 percent of original size [2021-01-06 11:13:26,833 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 14 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 134 treesize of output 197 [2021-01-06 11:13:26,841 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:27,025 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-01-06 11:13:27,028 INFO L625 ElimStorePlain]: treesize reduction 135, result has 51.3 percent of original size [2021-01-06 11:13:27,030 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:27,030 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:146, output treesize:142 [2021-01-06 11:13:27,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:27,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:27,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:27,565 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-01-06 11:13:27,566 INFO L348 Elim1Store]: treesize reduction 8, result has 94.3 percent of original size [2021-01-06 11:13:27,567 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 14 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 167 treesize of output 260 [2021-01-06 11:13:27,573 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:27,810 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-01-06 11:13:27,811 INFO L625 ElimStorePlain]: treesize reduction 200, result has 45.1 percent of original size [2021-01-06 11:13:27,814 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:27,814 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:179, output treesize:164 [2021-01-06 11:13:28,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:28,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:28,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:28,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:28,381 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-01-06 11:13:28,382 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:28,382 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 18 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 146 treesize of output 272 [2021-01-06 11:13:28,389 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2021-01-06 11:13:28,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:13:28,390 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 2, 1] term [2021-01-06 11:13:28,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:13:28,391 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 2, 1] term [2021-01-06 11:13:28,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:13:28,401 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:28,631 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-01-06 11:13:28,632 INFO L625 ElimStorePlain]: treesize reduction 43, result has 73.1 percent of original size [2021-01-06 11:13:28,635 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:28,636 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:152, output treesize:117 [2021-01-06 11:13:29,405 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-01-06 11:13:30,013 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:13:30,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:13:30,017 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2021-01-06 11:13:30,019 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2021-01-06 11:13:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:13:30,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793760990] [2021-01-06 11:13:30,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:13:30,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893960760] [2021-01-06 11:13:30,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:13:30,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-01-06 11:13:30,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090841999] [2021-01-06 11:13:30,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:13:30,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:13:30,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:13:30,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:13:30,147 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 25 states. [2021-01-06 11:13:33,076 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-01-06 11:13:34,152 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-01-06 11:13:34,491 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-01-06 11:13:34,850 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-01-06 11:13:35,224 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2021-01-06 11:13:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:13:35,550 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-01-06 11:13:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 11:13:35,552 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2021-01-06 11:13:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:13:35,552 INFO L225 Difference]: With dead ends: 55 [2021-01-06 11:13:35,552 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 11:13:35,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 11:13:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 11:13:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2021-01-06 11:13:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 11:13:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-01-06 11:13:35,568 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2021-01-06 11:13:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:13:35,569 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-01-06 11:13:35,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:13:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-01-06 11:13:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 11:13:35,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:13:35,570 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:13:35,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:13:35,771 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:13:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:13:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash -830099108, now seen corresponding path program 12 times [2021-01-06 11:13:35,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:13:35,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074417659] [2021-01-06 11:13:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:13:35,785 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:13:35,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874113132] [2021-01-06 11:13:35,786 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:13:36,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 11:13:36,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:13:36,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 11:13:36,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:13:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:13:36,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074417659] [2021-01-06 11:13:36,399 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:13:36,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874113132] [2021-01-06 11:13:36,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:13:36,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 11:13:36,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931403533] [2021-01-06 11:13:36,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:13:36,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:13:36,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:13:36,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:13:36,401 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 14 states. [2021-01-06 11:13:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:13:36,990 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2021-01-06 11:13:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:13:36,991 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2021-01-06 11:13:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:13:36,992 INFO L225 Difference]: With dead ends: 117 [2021-01-06 11:13:36,992 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 11:13:36,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:13:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 11:13:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-01-06 11:13:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 11:13:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-01-06 11:13:37,015 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2021-01-06 11:13:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:13:37,015 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-01-06 11:13:37,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:13:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-01-06 11:13:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 11:13:37,016 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:13:37,016 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:13:37,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:13:37,222 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:13:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:13:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1122933912, now seen corresponding path program 13 times [2021-01-06 11:13:37,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:13:37,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046404185] [2021-01-06 11:13:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:13:37,237 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:13:37,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579111211] [2021-01-06 11:13:37,238 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:13:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:13:37,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 11:13:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:13:37,394 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 11:13:37,397 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:37,419 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:37,426 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-01-06 11:13:37,428 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:37,462 INFO L625 ElimStorePlain]: treesize reduction 4, result has 85.7 percent of original size [2021-01-06 11:13:37,464 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:37,464 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-01-06 11:13:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:37,529 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-01-06 11:13:37,529 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-01-06 11:13:37,532 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:37,587 INFO L625 ElimStorePlain]: treesize reduction 16, result has 74.2 percent of original size [2021-01-06 11:13:37,588 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:37,588 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2021-01-06 11:13:37,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:37,713 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-01-06 11:13:37,714 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 74 [2021-01-06 11:13:37,716 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:37,788 INFO L625 ElimStorePlain]: treesize reduction 44, result has 60.4 percent of original size [2021-01-06 11:13:37,789 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:37,789 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:67 [2021-01-06 11:13:37,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:37,926 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:37,927 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 76 [2021-01-06 11:13:37,930 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:38,015 INFO L625 ElimStorePlain]: treesize reduction 22, result has 80.2 percent of original size [2021-01-06 11:13:38,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:38,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:89 [2021-01-06 11:13:38,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:38,216 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:38,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 99 [2021-01-06 11:13:38,220 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:38,305 INFO L625 ElimStorePlain]: treesize reduction 16, result has 79.5 percent of original size [2021-01-06 11:13:38,307 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:38,308 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:62 [2021-01-06 11:13:38,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,495 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:38,496 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 88 [2021-01-06 11:13:38,499 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:38,579 INFO L625 ElimStorePlain]: treesize reduction 4, result has 94.9 percent of original size [2021-01-06 11:13:38,581 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:38,581 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:74 [2021-01-06 11:13:38,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:38,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:38,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:38,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:38,924 INFO L348 Elim1Store]: treesize reduction 24, result has 64.7 percent of original size [2021-01-06 11:13:38,925 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 37 case distinctions, treesize of input 103 treesize of output 154 [2021-01-06 11:13:38,929 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:39,062 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-01-06 11:13:39,063 INFO L625 ElimStorePlain]: treesize reduction 96, result has 53.4 percent of original size [2021-01-06 11:13:39,064 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:39,064 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:112, output treesize:110 [2021-01-06 11:13:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:39,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:39,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:39,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:39,447 INFO L348 Elim1Store]: treesize reduction 8, result has 86.0 percent of original size [2021-01-06 11:13:39,448 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 37 case distinctions, treesize of input 137 treesize of output 172 [2021-01-06 11:13:39,452 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:39,598 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-01-06 11:13:39,599 INFO L625 ElimStorePlain]: treesize reduction 52, result has 71.9 percent of original size [2021-01-06 11:13:39,602 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:39,603 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:146, output treesize:133 [2021-01-06 11:13:39,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:39,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:39,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:39,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:39,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:39,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:40,071 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-01-06 11:13:40,073 INFO L348 Elim1Store]: treesize reduction 24, result has 71.4 percent of original size [2021-01-06 11:13:40,073 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 56 case distinctions, treesize of input 135 treesize of output 196 [2021-01-06 11:13:40,079 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:40,271 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-01-06 11:13:40,272 INFO L625 ElimStorePlain]: treesize reduction 137, result has 52.4 percent of original size [2021-01-06 11:13:40,273 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:40,273 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:144, output treesize:151 [2021-01-06 11:13:40,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:40,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:40,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:40,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:40,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:40,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:40,811 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-01-06 11:13:40,812 INFO L348 Elim1Store]: treesize reduction 24, result has 73.9 percent of original size [2021-01-06 11:13:40,812 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 67 case distinctions, treesize of input 166 treesize of output 220 [2021-01-06 11:13:40,820 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:41,015 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-01-06 11:13:41,016 INFO L625 ElimStorePlain]: treesize reduction 87, result has 63.0 percent of original size [2021-01-06 11:13:41,017 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:41,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:175, output treesize:148 [2021-01-06 11:13:41,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:41,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:41,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:41,487 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:41,488 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 56 case distinctions, treesize of input 147 treesize of output 196 [2021-01-06 11:13:41,494 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:41,651 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-01-06 11:13:41,652 INFO L625 ElimStorePlain]: treesize reduction 22, result has 88.3 percent of original size [2021-01-06 11:13:41,656 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:41,656 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:150, output treesize:166 [2021-01-06 11:13:43,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2021-01-06 11:13:43,141 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2021-01-06 11:13:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:13:43,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046404185] [2021-01-06 11:13:43,334 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:13:43,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579111211] [2021-01-06 11:13:43,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:13:43,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-01-06 11:13:43,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691191418] [2021-01-06 11:13:43,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 11:13:43,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:13:43,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 11:13:43,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-01-06 11:13:43,339 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 30 states. [2021-01-06 11:13:44,827 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-01-06 11:13:46,863 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-01-06 11:13:47,166 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-01-06 11:13:47,578 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-01-06 11:13:47,808 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-01-06 11:13:48,098 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2021-01-06 11:13:48,455 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2021-01-06 11:13:48,879 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-01-06 11:13:49,288 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2021-01-06 11:13:49,699 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2021-01-06 11:13:50,106 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-01-06 11:13:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:13:50,128 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2021-01-06 11:13:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 11:13:50,129 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 52 [2021-01-06 11:13:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:13:50,130 INFO L225 Difference]: With dead ends: 101 [2021-01-06 11:13:50,130 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 11:13:50,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=383, Invalid=3157, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 11:13:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 11:13:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2021-01-06 11:13:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 11:13:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-01-06 11:13:50,167 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 52 [2021-01-06 11:13:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:13:50,167 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-01-06 11:13:50,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 11:13:50,168 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-01-06 11:13:50,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 11:13:50,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:13:50,168 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:13:50,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:13:50,383 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:13:50,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:13:50,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1862588118, now seen corresponding path program 14 times [2021-01-06 11:13:50,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:13:50,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568535051] [2021-01-06 11:13:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:13:50,400 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:13:50,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645384305] [2021-01-06 11:13:50,400 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:13:50,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:13:50,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:13:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:13:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:13:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 11:13:50,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568535051] [2021-01-06 11:13:50,779 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:13:50,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645384305] [2021-01-06 11:13:50,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:13:50,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 11:13:50,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602706916] [2021-01-06 11:13:50,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:13:50,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:13:50,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:13:50,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:13:50,781 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 15 states. [2021-01-06 11:13:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:13:51,408 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2021-01-06 11:13:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:13:51,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2021-01-06 11:13:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:13:51,410 INFO L225 Difference]: With dead ends: 153 [2021-01-06 11:13:51,410 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 11:13:51,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:13:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 11:13:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-01-06 11:13:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 11:13:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-01-06 11:13:51,430 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 54 [2021-01-06 11:13:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:13:51,430 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-01-06 11:13:51,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:13:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-01-06 11:13:51,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 11:13:51,431 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:13:51,431 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:13:51,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 11:13:51,634 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:13:51,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:13:51,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1228478698, now seen corresponding path program 15 times [2021-01-06 11:13:51,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:13:51,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780152487] [2021-01-06 11:13:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:13:51,656 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:13:51,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835270703] [2021-01-06 11:13:51,656 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:13:52,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 11:13:52,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:13:52,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 97 conjunts are in the unsatisfiable core [2021-01-06 11:13:52,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:13:52,445 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:52,446 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-01-06 11:13:52,447 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:52,509 INFO L625 ElimStorePlain]: treesize reduction 12, result has 72.1 percent of original size [2021-01-06 11:13:52,510 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:52,511 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:31 [2021-01-06 11:13:52,553 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:13:52,575 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:52,575 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-01-06 11:13:52,581 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:52,587 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-01-06 11:13:52,589 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:52,635 INFO L625 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-01-06 11:13:52,638 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:52,638 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:13 [2021-01-06 11:13:52,722 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 11:13:52,723 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-01-06 11:13:52,724 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:52,745 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:52,746 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:52,746 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-01-06 11:13:52,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:52,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:52,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:52,850 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:52,851 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2021-01-06 11:13:52,853 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:52,890 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:52,891 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:13:52,891 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:57 [2021-01-06 11:13:53,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:53,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:53,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:13:53,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:13:53,500 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-01-06 11:13:53,501 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:13:53,501 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 80 treesize of output 353 [2021-01-06 11:13:53,507 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2021-01-06 11:13:53,507 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 11:13:53,508 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 3, 2, 1] term [2021-01-06 11:13:53,509 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 11:13:53,509 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 3, 2, 1] term [2021-01-06 11:13:53,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 11:13:53,510 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 3, 2, 1] term [2021-01-06 11:13:53,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 11:13:53,511 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2021-01-06 11:13:53,511 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:13:53,511 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2021-01-06 11:13:53,512 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:13:53,512 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 1] term [2021-01-06 11:13:53,512 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2021-01-06 11:13:53,512 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2021-01-06 11:13:53,513 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 11:13:53,522 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:13:54,520 WARN L197 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 67 [2021-01-06 11:13:54,521 INFO L625 ElimStorePlain]: treesize reduction 972, result has 17.8 percent of original size [2021-01-06 11:13:54,523 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2021-01-06 11:13:54,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:13:54,544 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:13:54,545 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:100, output treesize:211 [2021-01-06 11:13:54,549 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2021-01-06 11:13:54,555 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:13:54,705 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2021-01-06 11:13:54,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:13:54,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780152487] [2021-01-06 11:13:54,712 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:13:54,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835270703] [2021-01-06 11:13:54,712 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: should have been removed by DER [2021-01-06 11:13:54,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:13:54,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 11:13:54,712 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 11:13:54,713 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 11:13:54,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 11:13:54,966 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 11:13:54,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 11:13:54 BoogieIcfgContainer [2021-01-06 11:13:54,967 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 11:13:54,967 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 11:13:54,967 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 11:13:54,967 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 11:13:54,968 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:11:31" (3/4) ... [2021-01-06 11:13:54,972 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 11:13:54,973 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 11:13:54,974 INFO L168 Benchmark]: Toolchain (without parser) took 144454.01 ms. Allocated memory was 151.0 MB in the beginning and 220.2 MB in the end (delta: 69.2 MB). Free memory was 125.8 MB in the beginning and 154.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 41.2 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:54,974 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:13:54,975 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.53 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:54,982 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.56 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:54,983 INFO L168 Benchmark]: Boogie Preprocessor took 34.69 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 112.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:54,983 INFO L168 Benchmark]: RCFGBuilder took 622.35 ms. Allocated memory is still 151.0 MB. Free memory was 112.4 MB in the beginning and 97.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:54,985 INFO L168 Benchmark]: TraceAbstraction took 143424.49 ms. Allocated memory was 151.0 MB in the beginning and 220.2 MB in the end (delta: 69.2 MB). Free memory was 133.1 MB in the beginning and 154.9 MB in the end (delta: -21.8 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:54,985 INFO L168 Benchmark]: Witness Printer took 5.66 ms. Allocated memory is still 220.2 MB. Free memory was 154.9 MB in the beginning and 154.6 MB in the end (delta: 256.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:13:54,986 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.53 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 49.56 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.69 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 112.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 622.35 ms. Allocated memory is still 151.0 MB. Free memory was 112.4 MB in the beginning and 97.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 143424.49 ms. Allocated memory was 151.0 MB in the beginning and 220.2 MB in the end (delta: 69.2 MB). Free memory was 133.1 MB in the beginning and 154.9 MB in the end (delta: -21.8 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. * Witness Printer took 5.66 ms. Allocated memory is still 220.2 MB. Free memory was 154.9 MB in the beginning and 154.6 MB in the end (delta: 256.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 6 [L32] b[0] = 1 [L34] i=1 [L34] COND TRUE i