/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/pnr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:23:19,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:23:19,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:23:19,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:23:19,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:23:19,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:23:19,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:23:19,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:23:19,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:23:19,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:23:19,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:23:19,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:23:19,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:23:19,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:23:19,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:23:19,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:23:19,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:23:19,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:23:19,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:23:19,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:23:19,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:23:19,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:23:19,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:23:19,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:23:19,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 10:23:19,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 10:23:19,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 10:23:19,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 10:23:19,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 10:23:19,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 10:23:19,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:23:19,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:23:19,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:23:19,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:23:19,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:23:19,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:23:19,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:23:19,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:23:19,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:23:19,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:23:19,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:23:19,757 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 10:23:19,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:23:19,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:23:19,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:23:19,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:23:19,819 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:23:19,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:23:19,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:23:19,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:23:19,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:23:19,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:23:19,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:23:19,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:23:19,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:23:19,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:23:19,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:23:19,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:23:19,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:23:19,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:23:19,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:23:19,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:23:19,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:23:19,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:23:19,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:23:19,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:23:19,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:23:19,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:23:20,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:23:20,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:23:20,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:23:20,264 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:23:20,264 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:23:20,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr4.c [2021-01-06 10:23:20,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4e4507109/017a2c0f78844961940c9c355b8f24f4/FLAG14e72d783 [2021-01-06 10:23:20,970 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:23:20,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr4.c [2021-01-06 10:23:20,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4e4507109/017a2c0f78844961940c9c355b8f24f4/FLAG14e72d783 [2021-01-06 10:23:21,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4e4507109/017a2c0f78844961940c9c355b8f24f4 [2021-01-06 10:23:21,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:23:21,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:23:21,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:23:21,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:23:21,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:23:21,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d991937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21, skipping insertion in model container [2021-01-06 10:23:21,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:23:21,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:23:21,512 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/pnr4.c[395,408] 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: lhs: VariableLHS[~value~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[4],IdentifierExpression[~i~0,]],IntegerLiteral[4]]]]]] 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[4],IdentifierExpression[~i~0,]],IntegerLiteral[4]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~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[4],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]]]] 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[4],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~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[4],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[4],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~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[4],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] 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[4],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:23:21,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:23:21,554 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:23:21,568 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/pnr4.c[395,408] 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: lhs: VariableLHS[~value~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[4],IdentifierExpression[~i~0,]],IntegerLiteral[4]]]]]] 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[4],IdentifierExpression[~i~0,]],IntegerLiteral[4]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~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[4],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]]]] 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[4],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~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[4],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[4],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: lhs: VariableLHS[~value~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[4],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] 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[4],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:23:21,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:23:21,602 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:23:21,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21 WrapperNode [2021-01-06 10:23:21,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:23:21,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:23:21,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:23:21,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:23:21,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:23:21,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:23:21,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:23:21,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:23:21,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (1/1) ... [2021-01-06 10:23:21,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:23:21,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:23:21,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:23:21,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:23:21,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (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 10:23:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:23:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:23:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:23:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 10:23:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:23:21,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:23:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:23:22,274 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:23:22,274 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-01-06 10:23:22,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:23:22 BoogieIcfgContainer [2021-01-06 10:23:22,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:23:22,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:23:22,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:23:22,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:23:22,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:23:21" (1/3) ... [2021-01-06 10:23:22,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b819c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:23:22, skipping insertion in model container [2021-01-06 10:23:22,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:23:21" (2/3) ... [2021-01-06 10:23:22,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b819c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:23:22, skipping insertion in model container [2021-01-06 10:23:22,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:23:22" (3/3) ... [2021-01-06 10:23:22,287 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr4.c [2021-01-06 10:23:22,296 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:23:22,302 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:23:22,326 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:23:22,360 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:23:22,360 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:23:22,361 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:23:22,361 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:23:22,361 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:23:22,361 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:23:22,361 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:23:22,361 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:23:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-01-06 10:23:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:23:22,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:22,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:22,391 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1300456331, now seen corresponding path program 1 times [2021-01-06 10:23:22,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:22,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872157971] [2021-01-06 10:23:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:22,650 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 10:23:22,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872157971] [2021-01-06 10:23:22,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:23:22,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:23:22,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230194345] [2021-01-06 10:23:22,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:23:22,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:23:22,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:23:22,688 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2021-01-06 10:23:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:22,718 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2021-01-06 10:23:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:23:22,719 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:23:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:22,747 INFO L225 Difference]: With dead ends: 55 [2021-01-06 10:23:22,747 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:23:22,752 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 10:23:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:23:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 10:23:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:23:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-01-06 10:23:22,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2021-01-06 10:23:22,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:22,801 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-01-06 10:23:22,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:23:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-01-06 10:23:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:23:22,804 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:22,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:22,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:23:22,806 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:22,808 INFO L82 PathProgramCache]: Analyzing trace with hash 474551031, now seen corresponding path program 1 times [2021-01-06 10:23:22,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:22,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282250440] [2021-01-06 10:23:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:23,055 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 10:23:23,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282250440] [2021-01-06 10:23:23,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:23:23,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:23:23,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614723580] [2021-01-06 10:23:23,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:23:23,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:23:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:23:23,059 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2021-01-06 10:23:23,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:23,191 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-01-06 10:23:23,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:23:23,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 10:23:23,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:23,193 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:23:23,193 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 10:23:23,194 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 10:23:23,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 10:23:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2021-01-06 10:23:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:23:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-01-06 10:23:23,203 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 11 [2021-01-06 10:23:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:23,204 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-01-06 10:23:23,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:23:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-01-06 10:23:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 10:23:23,205 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:23,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:23,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:23:23,206 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:23,206 INFO L82 PathProgramCache]: Analyzing trace with hash -577210306, now seen corresponding path program 1 times [2021-01-06 10:23:23,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:23,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508561718] [2021-01-06 10:23:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:23,684 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 10:23:23,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508561718] [2021-01-06 10:23:23,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287858166] [2021-01-06 10:23:23,686 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 10:23:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:23,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:23:23,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:23,943 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 16 treesize of output 12 [2021-01-06 10:23:23,945 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:23,954 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:23,957 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 10:23:23,958 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:23:24,006 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:24,008 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 29 treesize of output 28 [2021-01-06 10:23:24,014 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:24,025 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:24,029 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 10:23:24,030 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:23:24,068 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:24,069 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 29 treesize of output 28 [2021-01-06 10:23:24,073 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:24,089 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:24,095 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 10:23:24,097 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:23:24,130 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-01-06 10:23:24,131 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 10:23:24,135 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:24,155 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:24,158 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 10:23:24,159 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2021-01-06 10:23:24,256 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:24,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:24,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:24,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:24,311 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 10:23:24,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:24,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 10:23:24,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066011027] [2021-01-06 10:23:24,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:23:24,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:24,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:23:24,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:23:24,315 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 14 states. [2021-01-06 10:23:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:25,380 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-01-06 10:23:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:23:25,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2021-01-06 10:23:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:25,382 INFO L225 Difference]: With dead ends: 86 [2021-01-06 10:23:25,382 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 10:23:25,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:23:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 10:23:25,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 29. [2021-01-06 10:23:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:23:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-01-06 10:23:25,392 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 24 [2021-01-06 10:23:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:25,393 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-01-06 10:23:25,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:23:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-01-06 10:23:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:23:25,394 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:25,394 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:25,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:23:25,608 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash -117663500, now seen corresponding path program 1 times [2021-01-06 10:23:25,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:25,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457899764] [2021-01-06 10:23:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:25,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457899764] [2021-01-06 10:23:25,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944584668] [2021-01-06 10:23:25,849 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 10:23:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:25,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:23:25,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:25,977 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:23:25,977 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:25,986 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:25,988 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 10:23:25,988 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-01-06 10:23:26,032 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:26,033 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 30 treesize of output 29 [2021-01-06 10:23:26,035 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:26,044 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:26,046 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 10:23:26,046 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:20 [2021-01-06 10:23:26,089 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:23:26,089 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 24 treesize of output 23 [2021-01-06 10:23:26,092 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:26,099 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:26,101 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 10:23:26,101 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:14 [2021-01-06 10:23:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:26,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:26,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-01-06 10:23:26,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090706851] [2021-01-06 10:23:26,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:23:26,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:26,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:23:26,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:23:26,194 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 15 states. [2021-01-06 10:23:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:26,804 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2021-01-06 10:23:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:23:26,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2021-01-06 10:23:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:26,813 INFO L225 Difference]: With dead ends: 79 [2021-01-06 10:23:26,813 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 10:23:26,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:23:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 10:23:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2021-01-06 10:23:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 10:23:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-01-06 10:23:26,836 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 28 [2021-01-06 10:23:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:26,837 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-01-06 10:23:26,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:23:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-01-06 10:23:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:23:26,839 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:26,839 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:27,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:27,041 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:27,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1706011402, now seen corresponding path program 1 times [2021-01-06 10:23:27,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:27,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063426829] [2021-01-06 10:23:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:27,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063426829] [2021-01-06 10:23:27,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170017145] [2021-01-06 10:23:27,367 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 10:23:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:27,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:23:27,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:27,519 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 16 treesize of output 12 [2021-01-06 10:23:27,520 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:27,529 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:27,531 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 10:23:27,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:23:27,571 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:27,571 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 29 treesize of output 28 [2021-01-06 10:23:27,573 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:27,582 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:27,588 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 10:23:27,589 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:23:27,611 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:23:27,612 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 10:23:27,614 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:27,621 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:27,623 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 10:23:27,623 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-01-06 10:23:27,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:27,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:27,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:27,723 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:27,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:27,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-01-06 10:23:27,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101035928] [2021-01-06 10:23:27,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:23:27,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:27,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:23:27,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:23:27,753 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 15 states. [2021-01-06 10:23:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:28,864 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2021-01-06 10:23:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:23:28,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2021-01-06 10:23:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:28,872 INFO L225 Difference]: With dead ends: 106 [2021-01-06 10:23:28,872 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:23:28,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:23:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:23:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 33. [2021-01-06 10:23:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:23:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-01-06 10:23:28,906 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 28 [2021-01-06 10:23:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:28,906 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-01-06 10:23:28,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:23:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-01-06 10:23:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:23:28,907 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:28,907 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:29,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:29,126 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:29,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:29,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1890226518, now seen corresponding path program 2 times [2021-01-06 10:23:29,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:29,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85163573] [2021-01-06 10:23:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:29,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85163573] [2021-01-06 10:23:29,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477247676] [2021-01-06 10:23:29,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:29,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:23:29,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:29,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:23:29,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:29,394 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:23:29,395 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:29,404 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:29,406 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 10:23:29,407 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-01-06 10:23:29,452 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:23:29,453 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 24 treesize of output 23 [2021-01-06 10:23:29,455 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:29,462 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:29,466 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 10:23:29,466 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:14 [2021-01-06 10:23:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:29,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:29,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 10:23:29,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706242842] [2021-01-06 10:23:29,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:23:29,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:29,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:23:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:23:29,620 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 16 states. [2021-01-06 10:23:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:30,050 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2021-01-06 10:23:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:23:30,051 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2021-01-06 10:23:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:30,052 INFO L225 Difference]: With dead ends: 109 [2021-01-06 10:23:30,052 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 10:23:30,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:23:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 10:23:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 72. [2021-01-06 10:23:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:23:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2021-01-06 10:23:30,069 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 32 [2021-01-06 10:23:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:30,069 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2021-01-06 10:23:30,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:23:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2021-01-06 10:23:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:23:30,071 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:30,071 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:30,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:30,286 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:30,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:30,287 INFO L82 PathProgramCache]: Analyzing trace with hash 410596072, now seen corresponding path program 1 times [2021-01-06 10:23:30,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:30,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137485611] [2021-01-06 10:23:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:30,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137485611] [2021-01-06 10:23:30,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381659369] [2021-01-06 10:23:30,482 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 10:23:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:30,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:23:30,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:30,621 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 16 treesize of output 12 [2021-01-06 10:23:30,622 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:30,631 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:30,632 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 10:23:30,633 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:23:30,671 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:23:30,672 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 10:23:30,674 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:30,680 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:30,682 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 10:23:30,682 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-01-06 10:23:30,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:30,792 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:30,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:30,797 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:30,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:30,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-01-06 10:23:30,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052412540] [2021-01-06 10:23:30,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:23:30,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:30,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:23:30,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:23:30,844 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand 17 states. [2021-01-06 10:23:32,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:32,245 INFO L93 Difference]: Finished difference Result 143 states and 174 transitions. [2021-01-06 10:23:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:23:32,245 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2021-01-06 10:23:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:32,247 INFO L225 Difference]: With dead ends: 143 [2021-01-06 10:23:32,247 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 10:23:32,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=1364, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:23:32,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 10:23:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 37. [2021-01-06 10:23:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 10:23:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-01-06 10:23:32,257 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 32 [2021-01-06 10:23:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:32,257 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-01-06 10:23:32,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:23:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-01-06 10:23:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:23:32,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:32,259 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:32,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:23:32,473 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:32,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:32,474 INFO L82 PathProgramCache]: Analyzing trace with hash -46106272, now seen corresponding path program 3 times [2021-01-06 10:23:32,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:32,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701623976] [2021-01-06 10:23:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:32,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701623976] [2021-01-06 10:23:32,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62143635] [2021-01-06 10:23:32,730 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 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 10:23:32,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:23:32,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:32,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:23:32,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:32,869 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:23:32,870 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:32,876 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:32,878 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 10:23:32,878 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-01-06 10:23:32,911 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:23:32,911 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-01-06 10:23:32,913 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:32,919 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:32,921 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 10:23:32,921 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-01-06 10:23:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:33,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:33,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 10:23:33,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924650010] [2021-01-06 10:23:33,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:23:33,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:33,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:23:33,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:23:33,062 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 18 states. [2021-01-06 10:23:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:34,224 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2021-01-06 10:23:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:23:34,225 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2021-01-06 10:23:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:34,227 INFO L225 Difference]: With dead ends: 187 [2021-01-06 10:23:34,227 INFO L226 Difference]: Without dead ends: 185 [2021-01-06 10:23:34,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:23:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-01-06 10:23:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 92. [2021-01-06 10:23:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:23:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2021-01-06 10:23:34,248 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 36 [2021-01-06 10:23:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:34,248 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2021-01-06 10:23:34,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:23:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2021-01-06 10:23:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:23:34,250 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:34,250 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:34,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:34,460 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:34,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1735050014, now seen corresponding path program 1 times [2021-01-06 10:23:34,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:34,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122312847] [2021-01-06 10:23:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:34,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122312847] [2021-01-06 10:23:34,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789849779] [2021-01-06 10:23:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:34,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:23:34,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:34,844 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 10:23:34,845 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:34,851 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:34,852 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 10:23:34,853 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-01-06 10:23:35,027 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:35,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:35,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:35,036 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:35,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:35,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 10:23:35,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571510271] [2021-01-06 10:23:35,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:23:35,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:35,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:23:35,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:23:35,067 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand 18 states. [2021-01-06 10:23:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:37,060 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2021-01-06 10:23:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:23:37,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2021-01-06 10:23:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:37,061 INFO L225 Difference]: With dead ends: 180 [2021-01-06 10:23:37,062 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 10:23:37,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=352, Invalid=1540, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:23:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 10:23:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 41. [2021-01-06 10:23:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 10:23:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-01-06 10:23:37,074 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 36 [2021-01-06 10:23:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:37,074 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-01-06 10:23:37,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:23:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-01-06 10:23:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 10:23:37,075 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:37,076 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:37,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:37,291 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:37,292 INFO L82 PathProgramCache]: Analyzing trace with hash 345717014, now seen corresponding path program 4 times [2021-01-06 10:23:37,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:37,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573942071] [2021-01-06 10:23:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:37,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573942071] [2021-01-06 10:23:37,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411566804] [2021-01-06 10:23:37,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:37,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:23:37,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:37,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:23:37,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:38,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:38,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-06 10:23:38,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728008332] [2021-01-06 10:23:38,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:23:38,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:38,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:23:38,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:23:38,148 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 21 states. [2021-01-06 10:23:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:38,455 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-01-06 10:23:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:23:38,456 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2021-01-06 10:23:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:38,458 INFO L225 Difference]: With dead ends: 90 [2021-01-06 10:23:38,458 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:23:38,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:23:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:23:38,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-01-06 10:23:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:23:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-01-06 10:23:38,478 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 40 [2021-01-06 10:23:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:38,478 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-01-06 10:23:38,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:23:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-01-06 10:23:38,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 10:23:38,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:38,480 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:38,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:23:38,696 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash 960859439, now seen corresponding path program 5 times [2021-01-06 10:23:38,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:38,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346402728] [2021-01-06 10:23:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:38,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346402728] [2021-01-06 10:23:38,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840987867] [2021-01-06 10:23:38,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:39,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:23:39,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:39,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:23:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:39,173 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 16 treesize of output 12 [2021-01-06 10:23:39,175 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:39,182 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:39,183 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:39,183 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2021-01-06 10:23:39,231 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:39,231 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 29 treesize of output 28 [2021-01-06 10:23:39,233 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:39,242 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:39,244 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 10:23:39,244 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:23:39,263 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:39,264 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 29 treesize of output 28 [2021-01-06 10:23:39,266 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:39,276 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:39,279 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 10:23:39,279 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:23:39,299 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:39,300 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 29 treesize of output 28 [2021-01-06 10:23:39,301 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:39,310 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:39,312 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 10:23:39,313 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:23:39,361 INFO L348 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-01-06 10:23:39,362 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 20 treesize of output 20 [2021-01-06 10:23:39,363 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:39,371 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:39,372 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:23:39,372 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-01-06 10:23:39,433 INFO L348 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2021-01-06 10:23:39,433 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 33 treesize of output 35 [2021-01-06 10:23:39,435 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:39,445 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:39,447 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 10:23:39,448 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:23 [2021-01-06 10:23:39,482 INFO L348 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2021-01-06 10:23:39,482 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 33 treesize of output 35 [2021-01-06 10:23:39,484 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:39,494 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:39,496 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 10:23:39,497 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:23 [2021-01-06 10:23:39,532 INFO L348 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-01-06 10:23:39,533 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 27 treesize of output 29 [2021-01-06 10:23:39,537 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:39,543 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:39,545 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 10:23:39,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:17 [2021-01-06 10:23:39,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:39,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:23:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:39,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:39,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-01-06 10:23:39,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303349401] [2021-01-06 10:23:39,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:23:39,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:39,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:23:39,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:23:39,948 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 27 states. [2021-01-06 10:23:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:43,429 INFO L93 Difference]: Finished difference Result 226 states and 277 transitions. [2021-01-06 10:23:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 10:23:43,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2021-01-06 10:23:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:43,432 INFO L225 Difference]: With dead ends: 226 [2021-01-06 10:23:43,433 INFO L226 Difference]: Without dead ends: 224 [2021-01-06 10:23:43,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=937, Invalid=6035, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 10:23:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-01-06 10:23:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 58. [2021-01-06 10:23:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 10:23:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-01-06 10:23:43,452 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 53 [2021-01-06 10:23:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:43,452 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-01-06 10:23:43,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:23:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-01-06 10:23:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 10:23:43,454 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:43,454 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:43,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:43,670 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:43,671 INFO L82 PathProgramCache]: Analyzing trace with hash -582759067, now seen corresponding path program 6 times [2021-01-06 10:23:43,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:43,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109972632] [2021-01-06 10:23:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:43,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109972632] [2021-01-06 10:23:43,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612176056] [2021-01-06 10:23:43,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:44,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 10:23:44,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:23:44,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:23:44,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:44,401 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:23:44,404 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:44,413 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:44,414 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 10:23:44,415 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-01-06 10:23:44,481 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:44,481 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 30 treesize of output 29 [2021-01-06 10:23:44,484 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:44,495 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:44,497 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 10:23:44,498 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:20 [2021-01-06 10:23:44,525 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:23:44,525 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 24 treesize of output 23 [2021-01-06 10:23:44,528 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:44,536 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:44,537 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 10:23:44,538 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:14 [2021-01-06 10:23:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:44,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:44,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-01-06 10:23:44,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75671188] [2021-01-06 10:23:44,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:23:44,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:44,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:23:44,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:23:44,807 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 24 states. [2021-01-06 10:23:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:49,606 INFO L93 Difference]: Finished difference Result 726 states and 924 transitions. [2021-01-06 10:23:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-01-06 10:23:49,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2021-01-06 10:23:49,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:49,612 INFO L225 Difference]: With dead ends: 726 [2021-01-06 10:23:49,612 INFO L226 Difference]: Without dead ends: 724 [2021-01-06 10:23:49,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4952 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1445, Invalid=11665, Unknown=0, NotChecked=0, Total=13110 [2021-01-06 10:23:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-01-06 10:23:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 120. [2021-01-06 10:23:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 10:23:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 151 transitions. [2021-01-06 10:23:49,647 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 151 transitions. Word has length 57 [2021-01-06 10:23:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:49,647 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 151 transitions. [2021-01-06 10:23:49,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:23:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 151 transitions. [2021-01-06 10:23:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 10:23:49,648 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:49,649 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:49,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:23:49,863 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:49,864 INFO L82 PathProgramCache]: Analyzing trace with hash -655145625, now seen corresponding path program 1 times [2021-01-06 10:23:49,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:49,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490086717] [2021-01-06 10:23:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:50,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490086717] [2021-01-06 10:23:50,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922913558] [2021-01-06 10:23:50,170 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 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 10:23:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:50,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:23:50,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:50,369 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 16 treesize of output 12 [2021-01-06 10:23:50,369 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:50,376 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:50,377 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 10:23:50,377 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:23:50,425 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:23:50,426 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 29 treesize of output 28 [2021-01-06 10:23:50,427 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:50,436 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:50,442 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 10:23:50,443 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:23:50,460 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:23:50,461 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 10:23:50,462 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:50,469 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:50,470 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 10:23:50,470 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-01-06 10:23:50,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:50,726 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:50,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:50,729 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:23:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:50,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:50,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-01-06 10:23:50,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438824611] [2021-01-06 10:23:50,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:23:50,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:50,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:23:50,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:23:50,767 INFO L87 Difference]: Start difference. First operand 120 states and 151 transitions. Second operand 25 states. [2021-01-06 10:23:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:23:55,778 INFO L93 Difference]: Finished difference Result 324 states and 392 transitions. [2021-01-06 10:23:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 10:23:55,778 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2021-01-06 10:23:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:23:55,780 INFO L225 Difference]: With dead ends: 324 [2021-01-06 10:23:55,780 INFO L226 Difference]: Without dead ends: 322 [2021-01-06 10:23:55,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2661 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1162, Invalid=7210, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 10:23:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-01-06 10:23:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 62. [2021-01-06 10:23:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 10:23:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-01-06 10:23:55,803 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 57 [2021-01-06 10:23:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:23:55,803 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-01-06 10:23:55,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:23:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-01-06 10:23:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:23:55,804 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:23:55,804 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:23:56,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:23:56,019 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:23:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:23:56,020 INFO L82 PathProgramCache]: Analyzing trace with hash -618986853, now seen corresponding path program 7 times [2021-01-06 10:23:56,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:23:56,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627087598] [2021-01-06 10:23:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:23:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:56,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627087598] [2021-01-06 10:23:56,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174546550] [2021-01-06 10:23:56,242 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 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 10:23:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:23:56,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:23:56,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:23:56,434 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:23:56,438 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:56,448 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:56,449 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 10:23:56,449 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-01-06 10:23:56,506 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:23:56,506 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 24 treesize of output 23 [2021-01-06 10:23:56,508 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:23:56,525 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:23:56,527 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 10:23:56,527 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:14 [2021-01-06 10:23:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:23:56,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:23:56,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-01-06 10:23:56,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461552678] [2021-01-06 10:23:56,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:23:56,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:23:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:23:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:23:56,876 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 26 states. [2021-01-06 10:24:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:08,696 INFO L93 Difference]: Finished difference Result 1594 states and 2050 transitions. [2021-01-06 10:24:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-01-06 10:24:08,697 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2021-01-06 10:24:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:08,706 INFO L225 Difference]: With dead ends: 1594 [2021-01-06 10:24:08,706 INFO L226 Difference]: Without dead ends: 1592 [2021-01-06 10:24:08,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24892 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4418, Invalid=52942, Unknown=0, NotChecked=0, Total=57360 [2021-01-06 10:24:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-01-06 10:24:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 140. [2021-01-06 10:24:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-01-06 10:24:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2021-01-06 10:24:08,786 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 61 [2021-01-06 10:24:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:08,786 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2021-01-06 10:24:08,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:24:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2021-01-06 10:24:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:24:08,787 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:08,788 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:09,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:24:09,004 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:09,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1431997145, now seen corresponding path program 1 times [2021-01-06 10:24:09,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:09,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166732777] [2021-01-06 10:24:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166732777] [2021-01-06 10:24:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730319465] [2021-01-06 10:24:09,328 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 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 10:24:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:09,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:24:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:09,541 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 16 treesize of output 12 [2021-01-06 10:24:09,542 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:09,550 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:09,551 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 10:24:09,552 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:24:09,619 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:24:09,620 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 10:24:09,621 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:09,630 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:09,632 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 10:24:09,632 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-01-06 10:24:09,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:09,966 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:09,968 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:09,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:10,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:10,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-01-06 10:24:10,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478651595] [2021-01-06 10:24:10,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:24:10,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:10,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:24:10,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:24:10,020 INFO L87 Difference]: Start difference. First operand 140 states and 177 transitions. Second operand 27 states. [2021-01-06 10:24:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:17,292 INFO L93 Difference]: Finished difference Result 411 states and 497 transitions. [2021-01-06 10:24:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-01-06 10:24:17,293 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2021-01-06 10:24:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:17,295 INFO L225 Difference]: With dead ends: 411 [2021-01-06 10:24:17,295 INFO L226 Difference]: Without dead ends: 409 [2021-01-06 10:24:17,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4436 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1680, Invalid=11430, Unknown=0, NotChecked=0, Total=13110 [2021-01-06 10:24:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-01-06 10:24:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 66. [2021-01-06 10:24:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:24:17,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2021-01-06 10:24:17,322 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 61 [2021-01-06 10:24:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:17,322 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2021-01-06 10:24:17,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:24:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2021-01-06 10:24:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:24:17,323 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:17,323 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:17,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:24:17,537 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash 55094481, now seen corresponding path program 8 times [2021-01-06 10:24:17,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:17,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872890405] [2021-01-06 10:24:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:17,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872890405] [2021-01-06 10:24:17,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174671094] [2021-01-06 10:24:17,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:17,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:24:17,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:17,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:24:17,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:17,932 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 10:24:17,934 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:17,942 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:17,944 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 10:24:17,944 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-01-06 10:24:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:18,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:18,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-01-06 10:24:18,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388869510] [2021-01-06 10:24:18,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:24:18,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:18,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:24:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:24:18,383 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 28 states. [2021-01-06 10:24:37,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:37,853 INFO L93 Difference]: Finished difference Result 2382 states and 3042 transitions. [2021-01-06 10:24:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 355 states. [2021-01-06 10:24:37,854 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2021-01-06 10:24:37,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:37,864 INFO L225 Difference]: With dead ends: 2382 [2021-01-06 10:24:37,865 INFO L226 Difference]: Without dead ends: 2380 [2021-01-06 10:24:37,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61021 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=7618, Invalid=128174, Unknown=0, NotChecked=0, Total=135792 [2021-01-06 10:24:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-01-06 10:24:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 160. [2021-01-06 10:24:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:24:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 203 transitions. [2021-01-06 10:24:37,974 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 203 transitions. Word has length 65 [2021-01-06 10:24:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:37,975 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 203 transitions. [2021-01-06 10:24:37,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:24:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 203 transitions. [2021-01-06 10:24:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:24:37,976 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:37,976 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:38,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:24:38,187 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:38,188 INFO L82 PathProgramCache]: Analyzing trace with hash -788911021, now seen corresponding path program 1 times [2021-01-06 10:24:38,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:38,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167749633] [2021-01-06 10:24:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:38,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167749633] [2021-01-06 10:24:38,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752391933] [2021-01-06 10:24:38,473 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 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 10:24:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:38,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:24:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:38,726 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 10:24:38,727 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:38,735 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:38,736 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 10:24:38,737 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-01-06 10:24:39,164 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:39,166 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:39,169 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:39,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:39,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:39,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-01-06 10:24:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393984563] [2021-01-06 10:24:39,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:24:39,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:39,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:24:39,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:24:39,223 INFO L87 Difference]: Start difference. First operand 160 states and 203 transitions. Second operand 29 states. [2021-01-06 10:24:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:49,065 INFO L93 Difference]: Finished difference Result 460 states and 549 transitions. [2021-01-06 10:24:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-01-06 10:24:49,066 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2021-01-06 10:24:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:49,068 INFO L225 Difference]: With dead ends: 460 [2021-01-06 10:24:49,068 INFO L226 Difference]: Without dead ends: 458 [2021-01-06 10:24:49,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6404 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2170, Invalid=16190, Unknown=0, NotChecked=0, Total=18360 [2021-01-06 10:24:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-01-06 10:24:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 70. [2021-01-06 10:24:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:24:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-01-06 10:24:49,106 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 65 [2021-01-06 10:24:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:49,106 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-01-06 10:24:49,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:24:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-01-06 10:24:49,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:24:49,107 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:49,107 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:49,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:24:49,321 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:49,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1416999929, now seen corresponding path program 9 times [2021-01-06 10:24:49,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:49,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397192564] [2021-01-06 10:24:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 99 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:50,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397192564] [2021-01-06 10:24:50,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284185516] [2021-01-06 10:24:50,091 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 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 10:24:50,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 10:24:50,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:50,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:24:50,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 128 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:51,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:51,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-01-06 10:24:51,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470164905] [2021-01-06 10:24:51,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:24:51,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:51,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:24:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:24:51,170 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 31 states. [2021-01-06 10:24:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:24:51,728 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2021-01-06 10:24:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:24:51,729 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2021-01-06 10:24:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:24:51,732 INFO L225 Difference]: With dead ends: 135 [2021-01-06 10:24:51,732 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 10:24:51,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:24:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 10:24:51,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2021-01-06 10:24:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:24:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-01-06 10:24:51,783 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 69 [2021-01-06 10:24:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:24:51,783 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-01-06 10:24:51,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:24:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-01-06 10:24:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 10:24:51,784 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:24:51,784 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:24:51,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:24:51,985 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:24:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:24:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1202898290, now seen corresponding path program 10 times [2021-01-06 10:24:51,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:24:51,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005871853] [2021-01-06 10:24:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:24:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:24:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:52,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005871853] [2021-01-06 10:24:52,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451526955] [2021-01-06 10:24:52,412 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 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 10:24:52,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:24:52,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:24:52,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 10:24:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:24:52,575 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:24:52,868 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 16 treesize of output 12 [2021-01-06 10:24:52,869 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:52,879 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:52,880 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 10:24:52,881 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:24:52,951 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:24:52,952 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 29 treesize of output 28 [2021-01-06 10:24:52,953 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:52,965 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:52,966 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 10:24:52,967 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:24:52,990 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:24:52,991 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 29 treesize of output 28 [2021-01-06 10:24:52,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:53,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:53,004 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 10:24:53,005 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:24:53,025 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:24:53,026 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 10:24:53,028 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:24:53,036 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:24:53,038 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 10:24:53,038 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-01-06 10:24:53,618 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:53,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:53,623 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:53,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:53,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-01-06 10:24:53,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066897838] [2021-01-06 10:24:53,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:24:53,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:53,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:24:53,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:24:53,698 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 35 states. [2021-01-06 10:24:56,026 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-01-06 10:24:56,208 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-01-06 10:25:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:25:09,184 INFO L93 Difference]: Finished difference Result 475 states and 571 transitions. [2021-01-06 10:25:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-01-06 10:25:09,185 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 82 [2021-01-06 10:25:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:25:09,187 INFO L225 Difference]: With dead ends: 475 [2021-01-06 10:25:09,188 INFO L226 Difference]: Without dead ends: 473 [2021-01-06 10:25:09,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8824 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2971, Invalid=22789, Unknown=0, NotChecked=0, Total=25760 [2021-01-06 10:25:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-01-06 10:25:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 87. [2021-01-06 10:25:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 10:25:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-01-06 10:25:09,243 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 82 [2021-01-06 10:25:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:25:09,244 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-01-06 10:25:09,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:25:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-01-06 10:25:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:25:09,244 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:25:09,245 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:25:09,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:25:09,458 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:25:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:25:09,459 INFO L82 PathProgramCache]: Analyzing trace with hash 199734084, now seen corresponding path program 11 times [2021-01-06 10:25:09,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:25:09,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214378292] [2021-01-06 10:25:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:25:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:25:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:25:09,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214378292] [2021-01-06 10:25:09,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97350615] [2021-01-06 10:25:09,826 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 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 10:25:10,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:25:10,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:25:10,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 10:25:10,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:25:10,386 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:25:10,387 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:25:10,397 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:25:10,398 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 10:25:10,399 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-01-06 10:25:10,460 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:25:10,461 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 30 treesize of output 29 [2021-01-06 10:25:10,462 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:25:10,473 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:25:10,475 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 10:25:10,475 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:20 [2021-01-06 10:25:10,496 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:25:10,497 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 24 treesize of output 23 [2021-01-06 10:25:10,499 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:25:10,506 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:25:10,508 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 10:25:10,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:14 [2021-01-06 10:25:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:25:11,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:25:11,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-01-06 10:25:11,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013063542] [2021-01-06 10:25:11,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:25:11,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:25:11,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:25:11,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:25:11,186 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 34 states. [2021-01-06 10:25:55,645 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-01-06 10:25:59,148 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-01-06 10:26:38,134 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-01-06 10:26:40,730 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-01-06 10:27:07,315 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-01-06 10:27:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:27:24,017 INFO L93 Difference]: Finished difference Result 12086 states and 15778 transitions. [2021-01-06 10:27:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1603 states. [2021-01-06 10:27:24,018 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 86 [2021-01-06 10:27:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:27:24,059 INFO L225 Difference]: With dead ends: 12086 [2021-01-06 10:27:24,060 INFO L226 Difference]: Without dead ends: 12084 [2021-01-06 10:27:24,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1693 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 1618 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290509 ImplicationChecksByTransitivity, 93.1s TimeCoverageRelationStatistics Valid=79766, Invalid=2543014, Unknown=0, NotChecked=0, Total=2622780 [2021-01-06 10:27:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12084 states. [2021-01-06 10:27:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12084 to 188. [2021-01-06 10:27:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2021-01-06 10:27:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 238 transitions. [2021-01-06 10:27:24,440 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 238 transitions. Word has length 86 [2021-01-06 10:27:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:27:24,441 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 238 transitions. [2021-01-06 10:27:24,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:27:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 238 transitions. [2021-01-06 10:27:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:27:24,442 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:27:24,442 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:27:24,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:27:24,647 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:27:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:27:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash 184215366, now seen corresponding path program 2 times [2021-01-06 10:27:24,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:27:24,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700684550] [2021-01-06 10:27:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:27:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:27:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:27:25,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700684550] [2021-01-06 10:27:25,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728635347] [2021-01-06 10:27:25,324 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 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 10:27:25,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:27:25,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:27:25,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 10:27:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:27:25,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:27:25,866 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 16 treesize of output 12 [2021-01-06 10:27:25,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:25,884 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:25,885 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 10:27:25,886 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-01-06 10:27:25,980 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-01-06 10:27:25,981 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 29 treesize of output 28 [2021-01-06 10:27:25,983 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:25,998 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:26,000 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 10:27:26,001 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2021-01-06 10:27:26,030 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-01-06 10:27:26,031 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 10:27:26,033 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:27:26,045 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:27:26,047 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 10:27:26,047 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13