/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-tiling/skipped.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:27:29,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:27:29,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:27:29,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:27:29,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:27:29,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:27:29,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:27:29,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:27:29,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:27:29,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:27:29,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:27:29,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:27:29,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:27:29,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:27:29,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:27:29,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:27:29,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:27:29,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:27:29,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:27:29,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:27:29,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:27:29,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:27:29,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:27:29,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:27:29,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:27:29,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:27:29,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:27:29,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:27:29,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:27:29,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:27:29,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:27:29,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:27:29,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:27:29,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:27:29,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:27:29,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:27:29,923 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 10:27:29,968 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:27:29,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:27:29,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:27:29,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:27:29,973 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:27:29,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:27:29,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:27:29,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:27:29,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:27:29,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:27:29,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:27:29,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:27:29,976 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:27:29,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:27:29,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:27:29,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:27:29,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:27:29,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:27:29,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:27:29,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:27:29,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:27:29,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:27:29,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:27:29,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:27:29,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:27:29,978 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:27:30,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:27:30,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:27:30,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:27:30,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:27:30,407 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:27:30,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/skipped.c [2021-01-06 10:27:30,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3317a039f/2b679bcff2d74443bb71c10aeb817ed3/FLAG31a7d57cd [2021-01-06 10:27:31,080 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:27:31,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/skipped.c [2021-01-06 10:27:31,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3317a039f/2b679bcff2d74443bb71c10aeb817ed3/FLAG31a7d57cd [2021-01-06 10:27:31,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3317a039f/2b679bcff2d74443bb71c10aeb817ed3 [2021-01-06 10:27:31,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:27:31,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:27:31,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:27:31,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:27:31,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:27:31,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e8ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31, skipping insertion in model container [2021-01-06 10:27:31,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:27:31,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:27:31,590 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-tiling/skipped.c[398,411] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] 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[4],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[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] 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[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:27:31,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:27:31,647 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:27:31,664 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-tiling/skipped.c[398,411] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] 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[4],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[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] 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[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:27:31,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:27:31,716 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:27:31,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31 WrapperNode [2021-01-06 10:27:31,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:27:31,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:27:31,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:27:31,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:27:31,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:27:31,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:27:31,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:27:31,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:27:31,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (1/1) ... [2021-01-06 10:27:31,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:27:31,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:27:31,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:27:31,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:27:31,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (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 10:27:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:27:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:27:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:27:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 10:27:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:27:32,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:27:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:27:32,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:27:32,396 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 10:27:32,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:27:32 BoogieIcfgContainer [2021-01-06 10:27:32,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:27:32,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:27:32,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:27:32,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:27:32,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:27:31" (1/3) ... [2021-01-06 10:27:32,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6c4bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:27:32, skipping insertion in model container [2021-01-06 10:27:32,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:27:31" (2/3) ... [2021-01-06 10:27:32,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6c4bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:27:32, skipping insertion in model container [2021-01-06 10:27:32,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:27:32" (3/3) ... [2021-01-06 10:27:32,409 INFO L111 eAbstractionObserver]: Analyzing ICFG skipped.c [2021-01-06 10:27:32,418 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:27:32,424 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:27:32,449 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:27:32,479 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:27:32,479 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:27:32,479 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:27:32,480 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:27:32,480 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:27:32,480 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:27:32,480 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:27:32,480 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:27:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-01-06 10:27:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:27:32,501 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:32,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:32,503 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:32,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1607783550, now seen corresponding path program 1 times [2021-01-06 10:27:32,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:32,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432010729] [2021-01-06 10:27:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:32,730 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 10:27:32,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432010729] [2021-01-06 10:27:32,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:27:32,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:27:32,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029888206] [2021-01-06 10:27:32,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:27:32,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:32,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:27:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:27:32,761 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2021-01-06 10:27:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:32,779 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2021-01-06 10:27:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:27:32,781 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-06 10:27:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:32,790 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:27:32,791 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 10:27:32,794 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 10:27:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 10:27:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 10:27:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:27:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-01-06 10:27:32,830 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2021-01-06 10:27:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:32,831 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-01-06 10:27:32,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:27:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-01-06 10:27:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:27:32,832 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:32,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:32,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:27:32,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:32,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1872951298, now seen corresponding path program 1 times [2021-01-06 10:27:32,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:32,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221286088] [2021-01-06 10:27:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:32,945 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 10:27:32,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221286088] [2021-01-06 10:27:32,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:27:32,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:27:32,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466636378] [2021-01-06 10:27:32,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:27:32,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:32,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:27:32,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:27:32,949 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2021-01-06 10:27:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:33,004 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-01-06 10:27:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:27:33,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-01-06 10:27:33,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:33,005 INFO L225 Difference]: With dead ends: 37 [2021-01-06 10:27:33,005 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 10:27:33,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:27:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 10:27:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 10:27:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 10:27:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-01-06 10:27:33,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2021-01-06 10:27:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:33,012 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-01-06 10:27:33,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:27:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-01-06 10:27:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:27:33,013 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:33,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:33,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:27:33,014 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:33,014 INFO L82 PathProgramCache]: Analyzing trace with hash -270152420, now seen corresponding path program 1 times [2021-01-06 10:27:33,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:33,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154611585] [2021-01-06 10:27:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:33,087 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 10:27:33,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154611585] [2021-01-06 10:27:33,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731576058] [2021-01-06 10:27:33,088 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 10:27:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:33,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:27:33,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:33,291 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 10:27:33,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:33,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:27:33,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879003015] [2021-01-06 10:27:33,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:27:33,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:33,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:27:33,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:27:33,295 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2021-01-06 10:27:33,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:33,380 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-01-06 10:27:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:27:33,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-01-06 10:27:33,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:33,389 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:27:33,389 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 10:27:33,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:27:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 10:27:33,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-01-06 10:27:33,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:27:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-01-06 10:27:33,400 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2021-01-06 10:27:33,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:33,402 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-01-06 10:27:33,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:27:33,403 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-01-06 10:27:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:27:33,405 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:33,406 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:33,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:27:33,620 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:33,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1873689926, now seen corresponding path program 2 times [2021-01-06 10:27:33,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:33,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096820284] [2021-01-06 10:27:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:27:33,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096820284] [2021-01-06 10:27:33,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:27:33,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:27:33,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094332902] [2021-01-06 10:27:33,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:27:33,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:33,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:27:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:27:33,787 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2021-01-06 10:27:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:33,855 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 10:27:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:27:33,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 10:27:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:33,857 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:27:33,857 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:27:33,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:27:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:27:33,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-01-06 10:27:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:27:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:27:33,863 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-01-06 10:27:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:33,863 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:27:33,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:27:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:27:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:27:33,864 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:33,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:33,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 10:27:33,865 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:33,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:33,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1095507628, now seen corresponding path program 1 times [2021-01-06 10:27:33,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:33,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132125783] [2021-01-06 10:27:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:27:34,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132125783] [2021-01-06 10:27:34,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345022442] [2021-01-06 10:27:34,149 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 10:27:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:34,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:27:34,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:34,323 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-01-06 10:27:34,324 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:34,331 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:34,333 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:34,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2021-01-06 10:27:34,374 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-01-06 10:27:34,374 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 21 treesize of output 20 [2021-01-06 10:27:34,377 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:34,382 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:34,383 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:34,384 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:27:34,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:34,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:27:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:27:34,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:34,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 10:27:34,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157385022] [2021-01-06 10:27:34,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:27:34,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:27:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:27:34,489 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 14 states. [2021-01-06 10:27:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:35,307 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2021-01-06 10:27:35,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:27:35,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2021-01-06 10:27:35,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:35,309 INFO L225 Difference]: With dead ends: 78 [2021-01-06 10:27:35,310 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 10:27:35,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:27:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 10:27:35,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2021-01-06 10:27:35,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 10:27:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-01-06 10:27:35,320 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2021-01-06 10:27:35,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:35,320 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-01-06 10:27:35,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:27:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-01-06 10:27:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:27:35,322 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:35,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:35,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:35,537 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:35,539 INFO L82 PathProgramCache]: Analyzing trace with hash -415449258, now seen corresponding path program 1 times [2021-01-06 10:27:35,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:35,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102281116] [2021-01-06 10:27:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:27:35,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102281116] [2021-01-06 10:27:35,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994409986] [2021-01-06 10:27:35,699 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 10:27:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:35,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:27:35,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:35,889 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-01-06 10:27:35,890 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 21 treesize of output 20 [2021-01-06 10:27:35,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:35,899 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:35,901 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:35,901 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:27:35,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:35,958 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:27:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:27:35,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:35,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 10:27:35,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499460122] [2021-01-06 10:27:35,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:27:35,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:35,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:27:35,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:27:35,981 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 16 states. [2021-01-06 10:27:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:36,682 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-01-06 10:27:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:27:36,682 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2021-01-06 10:27:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:36,684 INFO L225 Difference]: With dead ends: 86 [2021-01-06 10:27:36,684 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 10:27:36,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:27:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 10:27:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 39. [2021-01-06 10:27:36,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:27:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-01-06 10:27:36,692 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 21 [2021-01-06 10:27:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:36,693 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-01-06 10:27:36,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:27:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-01-06 10:27:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:27:36,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:36,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:36,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:36,908 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:36,909 INFO L82 PathProgramCache]: Analyzing trace with hash -952716724, now seen corresponding path program 1 times [2021-01-06 10:27:36,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:36,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350167995] [2021-01-06 10:27:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:27:37,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350167995] [2021-01-06 10:27:37,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561785032] [2021-01-06 10:27:37,064 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 10:27:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:37,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:27:37,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:37,237 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:37,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:27:37,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:37,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-01-06 10:27:37,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143055541] [2021-01-06 10:27:37,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:27:37,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:37,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:27:37,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:27:37,259 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 13 states. [2021-01-06 10:27:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:37,649 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-01-06 10:27:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:27:37,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2021-01-06 10:27:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:37,651 INFO L225 Difference]: With dead ends: 53 [2021-01-06 10:27:37,652 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:27:37,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:27:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:27:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2021-01-06 10:27:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:27:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 10:27:37,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2021-01-06 10:27:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:37,670 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 10:27:37,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:27:37,670 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 10:27:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:27:37,671 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:37,672 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:37,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:37,886 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:37,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1643646272, now seen corresponding path program 1 times [2021-01-06 10:27:37,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:37,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887501440] [2021-01-06 10:27:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:27:38,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887501440] [2021-01-06 10:27:38,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066485626] [2021-01-06 10:27:38,005 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 10:27:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:27:38,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:27:38,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:38,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 10:27:38,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384104994] [2021-01-06 10:27:38,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:27:38,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:38,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:27:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:27:38,186 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 13 states. [2021-01-06 10:27:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:38,421 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-01-06 10:27:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:27:38,421 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2021-01-06 10:27:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:38,422 INFO L225 Difference]: With dead ends: 88 [2021-01-06 10:27:38,422 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:27:38,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:27:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:27:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2021-01-06 10:27:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:27:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-01-06 10:27:38,429 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2021-01-06 10:27:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:38,429 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-01-06 10:27:38,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:27:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-01-06 10:27:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:27:38,430 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:38,431 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:38,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:38,646 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1334470626, now seen corresponding path program 2 times [2021-01-06 10:27:38,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:38,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725389864] [2021-01-06 10:27:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 10:27:38,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725389864] [2021-01-06 10:27:38,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315300178] [2021-01-06 10:27:38,908 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 10:27:38,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:27:38,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:27:38,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:27:38,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 10:27:39,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:39,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-06 10:27:39,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509102941] [2021-01-06 10:27:39,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:27:39,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:39,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:27:39,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:27:39,160 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 15 states. [2021-01-06 10:27:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:39,499 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-01-06 10:27:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:27:39,500 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2021-01-06 10:27:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:39,501 INFO L225 Difference]: With dead ends: 62 [2021-01-06 10:27:39,501 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:27:39,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:27:39,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:27:39,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2021-01-06 10:27:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 10:27:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-01-06 10:27:39,527 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 31 [2021-01-06 10:27:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:39,527 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-01-06 10:27:39,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:27:39,528 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-01-06 10:27:39,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:27:39,529 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:39,529 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:39,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:39,745 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:39,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1713959812, now seen corresponding path program 3 times [2021-01-06 10:27:39,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:39,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923548783] [2021-01-06 10:27:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 10:27:40,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923548783] [2021-01-06 10:27:40,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755446464] [2021-01-06 10:27:40,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:40,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:27:40,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:27:40,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:27:40,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:40,193 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:27:40,253 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-01-06 10:27:40,253 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:40,259 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:40,260 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:40,260 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2021-01-06 10:27:40,304 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:27:40,305 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 23 treesize of output 22 [2021-01-06 10:27:40,306 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:40,311 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:40,312 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:40,312 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:27:40,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:40,474 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:27:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:27:40,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:40,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-01-06 10:27:40,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454070808] [2021-01-06 10:27:40,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:27:40,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:40,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:27:40,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:27:40,507 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 20 states. [2021-01-06 10:27:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:41,719 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2021-01-06 10:27:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:27:41,719 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2021-01-06 10:27:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:41,720 INFO L225 Difference]: With dead ends: 131 [2021-01-06 10:27:41,721 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:27:41,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:27:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:27:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 52. [2021-01-06 10:27:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:27:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-01-06 10:27:41,730 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 36 [2021-01-06 10:27:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:41,731 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-01-06 10:27:41,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:27:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-01-06 10:27:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 10:27:41,732 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:41,732 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:41,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:27:41,947 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:41,948 INFO L82 PathProgramCache]: Analyzing trace with hash 173183780, now seen corresponding path program 1 times [2021-01-06 10:27:41,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:41,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267241821] [2021-01-06 10:27:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:27:42,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267241821] [2021-01-06 10:27:42,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632467426] [2021-01-06 10:27:42,821 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 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 10:27:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:42,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:27:42,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:42,978 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:27:42,980 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:42,982 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:42,982 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:42,982 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2021-01-06 10:27:43,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:43,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:43,184 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:27:43,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:43,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2021-01-06 10:27:43,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341275693] [2021-01-06 10:27:43,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:27:43,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:43,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:27:43,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:27:43,220 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 25 states. [2021-01-06 10:27:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:47,217 INFO L93 Difference]: Finished difference Result 306 states and 355 transitions. [2021-01-06 10:27:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 10:27:47,217 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2021-01-06 10:27:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:47,219 INFO L225 Difference]: With dead ends: 306 [2021-01-06 10:27:47,219 INFO L226 Difference]: Without dead ends: 304 [2021-01-06 10:27:47,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1115, Invalid=6541, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 10:27:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-01-06 10:27:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 66. [2021-01-06 10:27:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:27:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-01-06 10:27:47,236 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 38 [2021-01-06 10:27:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:47,237 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-01-06 10:27:47,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:27:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-01-06 10:27:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 10:27:47,238 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:47,238 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:47,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:27:47,453 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:47,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:47,454 INFO L82 PathProgramCache]: Analyzing trace with hash -135300444, now seen corresponding path program 1 times [2021-01-06 10:27:47,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:47,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515193417] [2021-01-06 10:27:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:27:47,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515193417] [2021-01-06 10:27:47,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65867765] [2021-01-06 10:27:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:27:47,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:47,782 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:27:47,782 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 23 treesize of output 22 [2021-01-06 10:27:47,787 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:47,791 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:47,792 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:47,792 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:27:47,933 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:47,937 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:27:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:27:47,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:47,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-01-06 10:27:47,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294089589] [2021-01-06 10:27:47,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:27:47,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:47,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:27:47,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:27:47,966 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 19 states. [2021-01-06 10:27:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:49,112 INFO L93 Difference]: Finished difference Result 163 states and 203 transitions. [2021-01-06 10:27:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:27:49,113 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2021-01-06 10:27:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:49,114 INFO L225 Difference]: With dead ends: 163 [2021-01-06 10:27:49,114 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 10:27:49,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:27:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 10:27:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 56. [2021-01-06 10:27:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:27:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-01-06 10:27:49,126 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 38 [2021-01-06 10:27:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:49,126 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-01-06 10:27:49,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:27:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-01-06 10:27:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:27:49,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:49,127 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:49,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:49,341 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:49,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:49,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1279355238, now seen corresponding path program 2 times [2021-01-06 10:27:49,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:49,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685070446] [2021-01-06 10:27:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:27:50,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685070446] [2021-01-06 10:27:50,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252077795] [2021-01-06 10:27:50,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:50,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:27:50,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:27:50,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:27:50,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:50,670 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:27:51,058 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:51,071 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:27:51,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:51,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-01-06 10:27:51,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329368943] [2021-01-06 10:27:51,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:27:51,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:51,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:27:51,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:27:51,117 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 33 states. [2021-01-06 10:27:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:54,152 INFO L93 Difference]: Finished difference Result 177 states and 209 transitions. [2021-01-06 10:27:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:27:54,153 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2021-01-06 10:27:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:54,154 INFO L225 Difference]: With dead ends: 177 [2021-01-06 10:27:54,155 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 10:27:54,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=675, Invalid=4437, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 10:27:54,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 10:27:54,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 63. [2021-01-06 10:27:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:27:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2021-01-06 10:27:54,170 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 42 [2021-01-06 10:27:54,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:54,171 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2021-01-06 10:27:54,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:27:54,171 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2021-01-06 10:27:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:27:54,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:54,172 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:54,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:54,388 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1670167694, now seen corresponding path program 4 times [2021-01-06 10:27:54,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:54,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068015573] [2021-01-06 10:27:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:27:54,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068015573] [2021-01-06 10:27:54,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749648102] [2021-01-06 10:27:54,524 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 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 10:27:54,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:27:54,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:27:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:27:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:27:54,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:54,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-01-06 10:27:54,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145768971] [2021-01-06 10:27:54,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:27:54,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:54,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:27:54,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:27:54,749 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 19 states. [2021-01-06 10:27:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:55,115 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-01-06 10:27:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:27:55,116 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2021-01-06 10:27:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:55,117 INFO L225 Difference]: With dead ends: 112 [2021-01-06 10:27:55,117 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:27:55,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:27:55,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:27:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-01-06 10:27:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 10:27:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-01-06 10:27:55,129 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 46 [2021-01-06 10:27:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:55,129 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-01-06 10:27:55,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:27:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-01-06 10:27:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 10:27:55,132 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:55,132 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:55,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:27:55,346 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:55,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:55,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1173702100, now seen corresponding path program 5 times [2021-01-06 10:27:55,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:55,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969601126] [2021-01-06 10:27:55,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 10:27:55,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969601126] [2021-01-06 10:27:55,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44135850] [2021-01-06 10:27:55,641 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 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 10:27:55,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:27:55,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:27:55,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:27:55,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 10:27:56,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:56,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-06 10:27:56,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346102263] [2021-01-06 10:27:56,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:27:56,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:56,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:27:56,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:27:56,060 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 21 states. [2021-01-06 10:27:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:56,572 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-01-06 10:27:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:27:56,573 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2021-01-06 10:27:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:56,576 INFO L225 Difference]: With dead ends: 81 [2021-01-06 10:27:56,576 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:27:56,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:27:56,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:27:56,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-01-06 10:27:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:27:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-01-06 10:27:56,588 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2021-01-06 10:27:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:56,588 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-01-06 10:27:56,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:27:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-01-06 10:27:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 10:27:56,589 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:56,589 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:56,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:27:56,803 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:56,804 INFO L82 PathProgramCache]: Analyzing trace with hash -49846830, now seen corresponding path program 6 times [2021-01-06 10:27:56,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:56,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403175344] [2021-01-06 10:27:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 10:27:57,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403175344] [2021-01-06 10:27:57,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615334429] [2021-01-06 10:27:57,212 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 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 10:27:57,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 10:27:57,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:27:57,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:27:57,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:57,439 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-01-06 10:27:57,440 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:57,445 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:57,446 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:57,446 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2021-01-06 10:27:57,492 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:27:57,492 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 23 treesize of output 22 [2021-01-06 10:27:57,494 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:57,498 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:57,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:57,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:27:57,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:27:57,723 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:27:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 10:27:57,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:27:57,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-01-06 10:27:57,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262172903] [2021-01-06 10:27:57,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:27:57,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:27:57,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:27:57,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:27:57,762 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 24 states. [2021-01-06 10:27:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:59,117 INFO L93 Difference]: Finished difference Result 200 states and 235 transitions. [2021-01-06 10:27:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:27:59,117 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2021-01-06 10:27:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:59,119 INFO L225 Difference]: With dead ends: 200 [2021-01-06 10:27:59,119 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 10:27:59,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:27:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 10:27:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 69. [2021-01-06 10:27:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 10:27:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2021-01-06 10:27:59,133 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 53 [2021-01-06 10:27:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:59,134 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2021-01-06 10:27:59,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:27:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2021-01-06 10:27:59,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:27:59,135 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:59,135 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:59,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:27:59,346 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash 178236662, now seen corresponding path program 3 times [2021-01-06 10:27:59,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:59,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271367746] [2021-01-06 10:27:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:27:59,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271367746] [2021-01-06 10:27:59,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671359462] [2021-01-06 10:27:59,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:59,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:27:59,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:27:59,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:27:59,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:59,969 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:27:59,970 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:59,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:59,979 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:27:59,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2021-01-06 10:28:00,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:00,208 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:28:00,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:00,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-01-06 10:28:00,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245487934] [2021-01-06 10:28:00,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:28:00,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:00,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:28:00,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:28:00,255 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 26 states. [2021-01-06 10:28:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:03,634 INFO L93 Difference]: Finished difference Result 294 states and 382 transitions. [2021-01-06 10:28:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 10:28:03,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2021-01-06 10:28:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:03,639 INFO L225 Difference]: With dead ends: 294 [2021-01-06 10:28:03,640 INFO L226 Difference]: Without dead ends: 292 [2021-01-06 10:28:03,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=705, Invalid=5775, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 10:28:03,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-01-06 10:28:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 67. [2021-01-06 10:28:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 10:28:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-01-06 10:28:03,665 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 55 [2021-01-06 10:28:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:03,665 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-01-06 10:28:03,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:28:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-01-06 10:28:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:28:03,666 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:03,666 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:03,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:03,867 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:03,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2124223606, now seen corresponding path program 2 times [2021-01-06 10:28:03,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:03,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888262467] [2021-01-06 10:28:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:04,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888262467] [2021-01-06 10:28:04,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768163515] [2021-01-06 10:28:04,417 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 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 10:28:04,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:04,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:04,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 10:28:04,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:04,679 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:28:04,851 INFO L348 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-01-06 10:28:04,852 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 37 treesize of output 36 [2021-01-06 10:28:04,854 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:04,864 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:28:04,869 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 10:28:04,869 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:39 [2021-01-06 10:28:05,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:05,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:28:05,385 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:28:05,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:28:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:05,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:05,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2021-01-06 10:28:05,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194404797] [2021-01-06 10:28:05,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:28:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:28:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:28:05,448 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 34 states. [2021-01-06 10:28:11,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:11,738 INFO L93 Difference]: Finished difference Result 489 states and 647 transitions. [2021-01-06 10:28:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-01-06 10:28:11,739 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 55 [2021-01-06 10:28:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:11,743 INFO L225 Difference]: With dead ends: 489 [2021-01-06 10:28:11,743 INFO L226 Difference]: Without dead ends: 487 [2021-01-06 10:28:11,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4361 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1567, Invalid=11543, Unknown=0, NotChecked=0, Total=13110 [2021-01-06 10:28:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-01-06 10:28:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 73. [2021-01-06 10:28:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 10:28:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2021-01-06 10:28:11,766 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 55 [2021-01-06 10:28:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:11,767 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2021-01-06 10:28:11,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:28:11,767 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2021-01-06 10:28:11,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:28:11,768 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:11,768 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:11,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:28:11,983 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:11,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:11,984 INFO L82 PathProgramCache]: Analyzing trace with hash 828798828, now seen corresponding path program 4 times [2021-01-06 10:28:11,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:11,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377529246] [2021-01-06 10:28:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:13,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377529246] [2021-01-06 10:28:13,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124628233] [2021-01-06 10:28:13,829 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 10:28:13,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:28:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:14,648 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:14,650 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:28:14,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:14,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 37 [2021-01-06 10:28:14,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759166800] [2021-01-06 10:28:14,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:28:14,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:14,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:28:14,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:28:14,715 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 37 states. [2021-01-06 10:28:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:24,969 INFO L93 Difference]: Finished difference Result 389 states and 445 transitions. [2021-01-06 10:28:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-01-06 10:28:24,970 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 59 [2021-01-06 10:28:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:24,973 INFO L225 Difference]: With dead ends: 389 [2021-01-06 10:28:24,973 INFO L226 Difference]: Without dead ends: 349 [2021-01-06 10:28:24,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4344 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1675, Invalid=13577, Unknown=0, NotChecked=0, Total=15252 [2021-01-06 10:28:24,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-01-06 10:28:24,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 85. [2021-01-06 10:28:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 10:28:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2021-01-06 10:28:24,996 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 59 [2021-01-06 10:28:24,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:24,996 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2021-01-06 10:28:24,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:28:24,997 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2021-01-06 10:28:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:28:24,997 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:24,997 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:25,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:25,211 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:25,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:25,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2140830112, now seen corresponding path program 7 times [2021-01-06 10:28:25,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:25,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811647314] [2021-01-06 10:28:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 51 proven. 57 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 10:28:25,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811647314] [2021-01-06 10:28:25,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554324810] [2021-01-06 10:28:25,395 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 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 10:28:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:28:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 10:28:25,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:25,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-01-06 10:28:25,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452860626] [2021-01-06 10:28:25,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:28:25,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:25,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:28:25,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:28:25,749 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 25 states. [2021-01-06 10:28:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:26,338 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2021-01-06 10:28:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:28:26,338 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2021-01-06 10:28:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:26,339 INFO L225 Difference]: With dead ends: 148 [2021-01-06 10:28:26,339 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 10:28:26,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:28:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 10:28:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2021-01-06 10:28:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:28:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-01-06 10:28:26,356 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 63 [2021-01-06 10:28:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:26,357 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-01-06 10:28:26,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:28:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-01-06 10:28:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:28:26,357 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:26,357 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:26,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:26,570 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:26,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:26,570 INFO L82 PathProgramCache]: Analyzing trace with hash -771049342, now seen corresponding path program 8 times [2021-01-06 10:28:26,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:26,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271422536] [2021-01-06 10:28:26,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 42 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 10:28:27,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271422536] [2021-01-06 10:28:27,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238700444] [2021-01-06 10:28:27,022 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 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 10:28:27,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:27,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:27,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:28:27,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 10:28:27,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:27,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-01-06 10:28:27,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463548551] [2021-01-06 10:28:27,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:28:27,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:27,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:28:27,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:28:27,626 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 27 states. [2021-01-06 10:28:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:28,623 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2021-01-06 10:28:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:28:28,624 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2021-01-06 10:28:28,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:28,625 INFO L225 Difference]: With dead ends: 112 [2021-01-06 10:28:28,626 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 10:28:28,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:28:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 10:28:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2021-01-06 10:28:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 10:28:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-01-06 10:28:28,645 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 65 [2021-01-06 10:28:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:28,645 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-01-06 10:28:28,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:28:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-01-06 10:28:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 10:28:28,646 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:28,646 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:28,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:28:28,847 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1827931244, now seen corresponding path program 9 times [2021-01-06 10:28:28,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:28,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776998947] [2021-01-06 10:28:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 10:28:29,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776998947] [2021-01-06 10:28:29,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869424536] [2021-01-06 10:28:29,508 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 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 10:28:29,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 10:28:29,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:28:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:29,840 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-01-06 10:28:29,841 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:29,849 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:28:29,850 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:29,850 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2021-01-06 10:28:29,905 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:28:29,906 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 23 treesize of output 22 [2021-01-06 10:28:29,910 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:29,916 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:28:29,917 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:29,917 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:28:30,332 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:30,334 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:28:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 10:28:30,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:30,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-01-06 10:28:30,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772655010] [2021-01-06 10:28:30,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:28:30,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:30,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:28:30,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:28:30,390 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 30 states. [2021-01-06 10:28:32,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:32,833 INFO L93 Difference]: Finished difference Result 254 states and 299 transitions. [2021-01-06 10:28:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:28:32,837 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2021-01-06 10:28:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:32,838 INFO L225 Difference]: With dead ends: 254 [2021-01-06 10:28:32,838 INFO L226 Difference]: Without dead ends: 201 [2021-01-06 10:28:32,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:28:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-01-06 10:28:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 86. [2021-01-06 10:28:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 10:28:32,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2021-01-06 10:28:32,860 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 70 [2021-01-06 10:28:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:32,860 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2021-01-06 10:28:32,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:28:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2021-01-06 10:28:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 10:28:32,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:32,861 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:33,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:33,076 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash -29093964, now seen corresponding path program 5 times [2021-01-06 10:28:33,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:33,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213342305] [2021-01-06 10:28:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:28:33,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213342305] [2021-01-06 10:28:33,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392053887] [2021-01-06 10:28:33,497 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 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 10:28:33,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 10:28:33,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:33,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:28:33,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:33,876 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-01-06 10:28:33,879 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:33,887 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:28:33,889 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 10:28:33,889 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2021-01-06 10:28:34,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:34,512 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:34,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:28:34,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:34,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 27 [2021-01-06 10:28:34,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526736471] [2021-01-06 10:28:34,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:28:34,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:34,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:28:34,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:28:34,580 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 27 states. [2021-01-06 10:28:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:47,082 INFO L93 Difference]: Finished difference Result 1017 states and 1377 transitions. [2021-01-06 10:28:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-01-06 10:28:47,083 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2021-01-06 10:28:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:47,088 INFO L225 Difference]: With dead ends: 1017 [2021-01-06 10:28:47,089 INFO L226 Difference]: Without dead ends: 1015 [2021-01-06 10:28:47,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 61 SyntacticMatches, 9 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24955 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3745, Invalid=53615, Unknown=0, NotChecked=0, Total=57360 [2021-01-06 10:28:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-01-06 10:28:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 84. [2021-01-06 10:28:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 10:28:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2021-01-06 10:28:47,126 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 72 [2021-01-06 10:28:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:47,126 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2021-01-06 10:28:47,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:28:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2021-01-06 10:28:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 10:28:47,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:47,127 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:47,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:28:47,328 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash -803080396, now seen corresponding path program 3 times [2021-01-06 10:28:47,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:47,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455645592] [2021-01-06 10:28:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:28:47,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455645592] [2021-01-06 10:28:47,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924116994] [2021-01-06 10:28:47,906 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 10:28:48,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 10:28:48,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:48,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 10:28:48,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:48,232 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 10:28:48,234 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,241 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:28:48,243 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,244 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-01-06 10:28:48,252 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 10:28:48,253 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:28:48,266 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,267 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-01-06 10:28:48,467 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-01-06 10:28:48,468 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,480 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:28:48,481 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,481 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-01-06 10:28:48,557 INFO L348 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-01-06 10:28:48,558 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 37 treesize of output 36 [2021-01-06 10:28:48,559 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,573 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:28:48,574 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,575 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2021-01-06 10:28:48,780 INFO L348 Elim1Store]: treesize reduction 108, result has 18.8 percent of original size [2021-01-06 10:28:48,781 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2021-01-06 10:28:48,784 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,805 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:28:48,806 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:60 [2021-01-06 10:28:48,968 INFO L348 Elim1Store]: treesize reduction 189, result has 16.4 percent of original size [2021-01-06 10:28:48,969 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 74 [2021-01-06 10:28:48,972 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,996 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:28:48,997 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:48,997 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2021-01-06 10:28:49,337 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2021-01-06 10:28:49,339 INFO L348 Elim1Store]: treesize reduction 138, result has 42.3 percent of original size [2021-01-06 10:28:49,339 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 129 [2021-01-06 10:28:49,343 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:49,418 INFO L625 ElimStorePlain]: treesize reduction 50, result has 55.4 percent of original size [2021-01-06 10:28:49,419 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:49,420 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:62 [2021-01-06 10:28:49,734 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2021-01-06 10:28:49,735 INFO L348 Elim1Store]: treesize reduction 235, result has 33.6 percent of original size [2021-01-06 10:28:49,735 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 154 [2021-01-06 10:28:49,739 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:49,825 INFO L625 ElimStorePlain]: treesize reduction 52, result has 60.0 percent of original size [2021-01-06 10:28:49,826 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:49,826 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:78 [2021-01-06 10:28:50,631 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 56 [2021-01-06 10:28:50,632 INFO L348 Elim1Store]: treesize reduction 495, result has 22.4 percent of original size [2021-01-06 10:28:50,633 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 192 [2021-01-06 10:28:50,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:28:50,743 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-01-06 10:28:50,744 INFO L625 ElimStorePlain]: treesize reduction 52, result has 68.3 percent of original size [2021-01-06 10:28:50,745 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:28:50,746 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:116, output treesize:112 [2021-01-06 10:28:52,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:52,031 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 10:28:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 106 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 10:28:52,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:52,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 47 [2021-01-06 10:28:52,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533134092] [2021-01-06 10:28:52,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:28:52,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:28:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:28:52,156 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 47 states. [2021-01-06 10:29:02,510 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-01-06 10:29:02,694 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-01-06 10:29:04,246 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-01-06 10:29:04,424 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-01-06 10:29:04,592 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-01-06 10:29:04,891 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-01-06 10:29:07,389 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-01-06 10:29:14,796 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-01-06 10:29:20,441 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-01-06 10:29:22,570 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-01-06 10:29:22,958 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-01-06 10:29:23,138 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-01-06 10:29:23,695 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-01-06 10:29:23,896 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-01-06 10:29:24,431 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-01-06 10:29:24,631 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-01-06 10:29:25,071 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-01-06 10:29:25,730 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-01-06 10:29:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:25,869 INFO L93 Difference]: Finished difference Result 1503 states and 2059 transitions. [2021-01-06 10:29:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2021-01-06 10:29:25,870 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2021-01-06 10:29:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:25,878 INFO L225 Difference]: With dead ends: 1503 [2021-01-06 10:29:25,879 INFO L226 Difference]: Without dead ends: 1501 [2021-01-06 10:29:25,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43884 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=9434, Invalid=90738, Unknown=0, NotChecked=0, Total=100172 [2021-01-06 10:29:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-01-06 10:29:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 104. [2021-01-06 10:29:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 10:29:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2021-01-06 10:29:25,933 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 72 [2021-01-06 10:29:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:25,933 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2021-01-06 10:29:25,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:29:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2021-01-06 10:29:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:29:25,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:25,934 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:26,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:29:26,148 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:26,149 INFO L82 PathProgramCache]: Analyzing trace with hash 578767658, now seen corresponding path program 6 times [2021-01-06 10:29:26,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:26,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255010056] [2021-01-06 10:29:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:29:26,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255010056] [2021-01-06 10:29:26,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258445466] [2021-01-06 10:29:26,989 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:27,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:29:27,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:29:27,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:28,046 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:28,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:29:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:29:28,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:28,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 30 [2021-01-06 10:29:28,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687609927] [2021-01-06 10:29:28,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:29:28,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:28,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:29:28,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:29:28,124 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 30 states. [2021-01-06 10:29:49,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:49,158 INFO L93 Difference]: Finished difference Result 1704 states and 2336 transitions. [2021-01-06 10:29:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 270 states. [2021-01-06 10:29:49,160 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2021-01-06 10:29:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:49,203 INFO L225 Difference]: With dead ends: 1704 [2021-01-06 10:29:49,203 INFO L226 Difference]: Without dead ends: 1702 [2021-01-06 10:29:49,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34469 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=5283, Invalid=72837, Unknown=0, NotChecked=0, Total=78120 [2021-01-06 10:29:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2021-01-06 10:29:49,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 81. [2021-01-06 10:29:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 10:29:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-01-06 10:29:49,265 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 76 [2021-01-06 10:29:49,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:49,265 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-01-06 10:29:49,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:29:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-01-06 10:29:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 10:29:49,266 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:49,266 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:49,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:49,478 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:49,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:49,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1696722206, now seen corresponding path program 10 times [2021-01-06 10:29:49,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:49,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843716803] [2021-01-06 10:29:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 93 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-01-06 10:29:49,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843716803] [2021-01-06 10:29:49,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761561120] [2021-01-06 10:29:49,980 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:50,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:50,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:50,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:29:50,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-01-06 10:29:50,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:50,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-01-06 10:29:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983014838] [2021-01-06 10:29:50,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:29:50,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:50,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:29:50,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:29:50,891 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 31 states. [2021-01-06 10:29:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:52,167 INFO L93 Difference]: Finished difference Result 220 states and 257 transitions. [2021-01-06 10:29:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:29:52,168 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 80 [2021-01-06 10:29:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:52,170 INFO L225 Difference]: With dead ends: 220 [2021-01-06 10:29:52,170 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 10:29:52,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=433, Invalid=1459, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:29:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 10:29:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2021-01-06 10:29:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:29:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-01-06 10:29:52,234 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 80 [2021-01-06 10:29:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:52,234 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-01-06 10:29:52,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:29:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2021-01-06 10:29:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 10:29:52,235 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:52,235 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:52,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:29:52,436 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:52,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1951988932, now seen corresponding path program 11 times [2021-01-06 10:29:52,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:52,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979422163] [2021-01-06 10:29:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 10:29:53,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979422163] [2021-01-06 10:29:53,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885818676] [2021-01-06 10:29:53,514 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:53,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:29:53,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:29:53,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 64 proven. 51 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 10:29:54,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:29:54,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-01-06 10:29:54,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493558820] [2021-01-06 10:29:54,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:29:54,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:54,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:29:54,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:29:54,971 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 33 states. [2021-01-06 10:29:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:57,229 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2021-01-06 10:29:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:29:57,231 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 82 [2021-01-06 10:29:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:57,232 INFO L225 Difference]: With dead ends: 143 [2021-01-06 10:29:57,232 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 10:29:57,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=477, Invalid=1593, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 10:29:57,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 10:29:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2021-01-06 10:29:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:29:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2021-01-06 10:29:57,273 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 82 [2021-01-06 10:29:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:57,273 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2021-01-06 10:29:57,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:29:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2021-01-06 10:29:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 10:29:57,274 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:57,274 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:57,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:57,489 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:57,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1954581362, now seen corresponding path program 12 times [2021-01-06 10:29:57,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:57,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029134208] [2021-01-06 10:29:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 39 proven. 97 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 10:29:58,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029134208] [2021-01-06 10:29:58,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690397550] [2021-01-06 10:29:58,777 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:59,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 10:29:59,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:59,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:29:59,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 55 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 10:30:01,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:30:01,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-01-06 10:30:01,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934641644] [2021-01-06 10:30:01,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:30:01,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:01,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:30:01,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:30:01,063 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 35 states. [2021-01-06 10:30:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:30:02,666 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2021-01-06 10:30:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:30:02,672 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2021-01-06 10:30:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:30:02,672 INFO L225 Difference]: With dead ends: 157 [2021-01-06 10:30:02,672 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 10:30:02,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=409, Invalid=1397, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:30:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 10:30:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-01-06 10:30:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:30:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2021-01-06 10:30:02,704 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 87 [2021-01-06 10:30:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:30:02,704 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2021-01-06 10:30:02,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:30:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2021-01-06 10:30:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:30:02,705 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:30:02,705 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:30:02,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:30:02,906 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:30:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:30:02,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1687811988, now seen corresponding path program 13 times [2021-01-06 10:30:02,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:30:02,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408381870] [2021-01-06 10:30:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:30:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:30:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:30:04,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408381870] [2021-01-06 10:30:04,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411544220] [2021-01-06 10:30:04,161 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:30:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:30:04,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 10:30:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:30:04,612 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-01-06 10:30:04,614 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:04,625 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:04,626 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:04,626 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2021-01-06 10:30:04,733 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:30:04,733 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 23 treesize of output 22 [2021-01-06 10:30:04,736 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:30:04,747 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:30:04,748 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:30:04,749 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:30:05,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:30:05,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:30:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:30:05,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:30:05,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 41 [2021-01-06 10:30:05,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365964104] [2021-01-06 10:30:05,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:30:05,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:30:05,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:30:05,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1513, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:30:05,832 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 41 states. [2021-01-06 10:30:19,012 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-01-06 10:30:30,360 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-01-06 10:30:36,285 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-01-06 10:30:36,522 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-01-06 10:30:36,729 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-01-06 10:30:37,119 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-01-06 10:30:37,318 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-01-06 10:30:37,509 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-01-06 10:30:41,214 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-01-06 10:30:41,410 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-01-06 10:30:41,606 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-01-06 10:30:41,986 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-01-06 10:30:42,911 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-01-06 10:30:46,554 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-01-06 10:30:46,929 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 10:30:47,313 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-01-06 10:30:48,013 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 10:30:51,209 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-01-06 10:30:59,974 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-01-06 10:31:00,204 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-01-06 10:31:00,412 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 10:31:00,808 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-01-06 10:31:01,010 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-01-06 10:31:01,584 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 10:31:01,778 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 10:31:02,349 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 10:31:03,119 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-01-06 10:31:10,526 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-01-06 10:31:10,819 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-01-06 10:31:11,079 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-01-06 10:31:11,306 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-01-06 10:31:11,520 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-01-06 10:31:11,746 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-01-06 10:31:11,961 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 10:31:12,171 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 10:31:12,376 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 10:31:12,637 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-01-06 10:31:12,848 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-01-06 10:31:13,052 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-01-06 10:31:13,257 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-01-06 10:31:13,464 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 10:31:13,672 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 10:31:13,873 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 10:31:14,306 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-01-06 10:31:14,520 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 10:31:14,728 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 10:31:15,134 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-01-06 10:31:15,342 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-01-06 10:31:15,547 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-01-06 10:31:15,966 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 10:31:16,172 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 10:31:16,785 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-01-06 10:31:17,865 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-01-06 10:31:18,078 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-01-06 10:31:18,278 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-01-06 10:31:18,673 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-01-06 10:31:19,473 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-01-06 10:31:21,099 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-01-06 10:31:34,877 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-01-06 10:31:36,425 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-01-06 10:31:36,644 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-01-06 10:31:36,866 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-01-06 10:31:37,307 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 10:31:38,191 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-01-06 10:31:38,420 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-01-06 10:31:40,062 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 10:31:40,503 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-01-06 10:31:40,958 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47