/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:52:58,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:52:58,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:52:58,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:52:58,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:52:58,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:52:58,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:52:58,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:52:58,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:52:58,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:52:58,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:52:58,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:52:58,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:52:58,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:52:58,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:52:58,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:52:58,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:52:58,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:52:58,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:52:58,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:52:58,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:52:58,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:52:58,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:52:58,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:52:58,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:52:58,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 00:52:58,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 00:52:58,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 00:52:58,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 00:52:58,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 00:52:58,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 00:52:58,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 00:52:58,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 00:52:58,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:52:58,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:52:58,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:52:58,959 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:52:58,987 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:52:58,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:52:58,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:52:58,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:52:58,989 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:52:58,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:52:58,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:52:58,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:52:58,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:52:58,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:52:58,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:52:58,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:52:58,991 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:52:58,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:52:58,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:52:58,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:52:58,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:52:58,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:52:58,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:52:58,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:52:58,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:52:58,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:52:58,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:52:58,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:52:58,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:52:58,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:52:59,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:52:59,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:52:59,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:52:59,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:52:59,390 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:52:59,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2020-12-23 00:52:59,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2cf1c6f5a/49294b02fb1e43ae9bf3c7d48ff33548/FLAGf8355cd7d [2020-12-23 00:53:00,198 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:53:00,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2020-12-23 00:53:00,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2cf1c6f5a/49294b02fb1e43ae9bf3c7d48ff33548/FLAGf8355cd7d [2020-12-23 00:53:00,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2cf1c6f5a/49294b02fb1e43ae9bf3c7d48ff33548 [2020-12-23 00:53:00,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:53:00,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:53:00,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:53:00,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:53:00,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:53:00,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:00,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c548d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00, skipping insertion in model container [2020-12-23 00:53:00,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:00,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:53:00,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:53:00,775 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~B~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~B~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~C~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:53:00,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:53:00,815 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:53:00,830 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#B~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#B~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#B~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#B~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#C~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#C~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:53:00,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:53:00,878 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:53:00,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00 WrapperNode [2020-12-23 00:53:00,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:53:00,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:53:00,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:53:00,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:53:00,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:00,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:00,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:53:00,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:53:00,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:53:00,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:53:00,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:00,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:00,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:00,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:01,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:01,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:01,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (1/1) ... [2020-12-23 00:53:01,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:53:01,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:53:01,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:53:01,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:53:01,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:53:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:53:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:53:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:53:01,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:53:01,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:53:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:53:01,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:53:01,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:53:01,835 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 00:53:01,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:53:01 BoogieIcfgContainer [2020-12-23 00:53:01,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:53:01,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:53:01,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:53:01,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:53:01,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:53:00" (1/3) ... [2020-12-23 00:53:01,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9b5216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:53:01, skipping insertion in model container [2020-12-23 00:53:01,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:00" (2/3) ... [2020-12-23 00:53:01,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9b5216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:53:01, skipping insertion in model container [2020-12-23 00:53:01,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:53:01" (3/3) ... [2020-12-23 00:53:01,859 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2020-12-23 00:53:01,867 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:53:01,877 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:53:01,899 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:53:01,928 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:53:01,928 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:53:01,928 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:53:01,929 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:53:01,929 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:53:01,929 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:53:01,929 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:53:01,929 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:53:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-23 00:53:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 00:53:01,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:01,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:01,953 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1352657881, now seen corresponding path program 1 times [2020-12-23 00:53:01,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:01,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317938000] [2020-12-23 00:53:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:02,072 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:02,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249430533] [2020-12-23 00:53:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:02,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:53:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:02,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317938000] [2020-12-23 00:53:02,273 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:02,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249430533] [2020-12-23 00:53:02,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:53:02,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:53:02,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925916054] [2020-12-23 00:53:02,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:53:02,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:02,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:53:02,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:53:02,306 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-12-23 00:53:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:02,385 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2020-12-23 00:53:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:53:02,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 00:53:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:02,397 INFO L225 Difference]: With dead ends: 51 [2020-12-23 00:53:02,398 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 00:53:02,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:53:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 00:53:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-23 00:53:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 00:53:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-12-23 00:53:02,444 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 12 [2020-12-23 00:53:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:02,444 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-12-23 00:53:02,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:53:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-12-23 00:53:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:53:02,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:02,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:02,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:53:02,661 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash -68107374, now seen corresponding path program 1 times [2020-12-23 00:53:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:02,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797090457] [2020-12-23 00:53:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:02,685 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:02,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475564919] [2020-12-23 00:53:02,686 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:53:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:02,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797090457] [2020-12-23 00:53:02,860 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:02,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475564919] [2020-12-23 00:53:02,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:53:02,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:53:02,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583959898] [2020-12-23 00:53:02,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:53:02,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:02,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:53:02,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:53:02,867 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2020-12-23 00:53:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:02,969 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-12-23 00:53:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:53:02,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-23 00:53:02,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:02,971 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:53:02,971 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:53:02,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:53:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:53:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-12-23 00:53:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:53:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-12-23 00:53:02,982 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2020-12-23 00:53:02,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:02,982 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-12-23 00:53:02,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:53:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-23 00:53:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:53:02,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:02,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:03,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:03,200 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:03,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1915152726, now seen corresponding path program 1 times [2020-12-23 00:53:03,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:03,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942921850] [2020-12-23 00:53:03,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:03,217 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:03,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995472172] [2020-12-23 00:53:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:03,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:53:03,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:03,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942921850] [2020-12-23 00:53:03,364 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:03,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995472172] [2020-12-23 00:53:03,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:03,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:53:03,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203644114] [2020-12-23 00:53:03,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:53:03,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:53:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:03,367 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2020-12-23 00:53:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:03,509 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-12-23 00:53:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:53:03,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 00:53:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:03,513 INFO L225 Difference]: With dead ends: 66 [2020-12-23 00:53:03,513 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 00:53:03,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:03,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 00:53:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-12-23 00:53:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 00:53:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-12-23 00:53:03,536 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2020-12-23 00:53:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:03,536 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-12-23 00:53:03,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:53:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-12-23 00:53:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:53:03,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:03,540 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:03,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:03,758 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:03,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:03,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1028293614, now seen corresponding path program 2 times [2020-12-23 00:53:03,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:03,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616124352] [2020-12-23 00:53:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:03,772 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:03,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258414676] [2020-12-23 00:53:03,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:03,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:53:03,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:53:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:53:03,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616124352] [2020-12-23 00:53:03,931 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:03,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258414676] [2020-12-23 00:53:03,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:53:03,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:53:03,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184719134] [2020-12-23 00:53:03,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:53:03,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:03,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:53:03,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:53:03,936 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2020-12-23 00:53:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:04,047 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-12-23 00:53:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:53:04,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-23 00:53:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:04,050 INFO L225 Difference]: With dead ends: 75 [2020-12-23 00:53:04,050 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 00:53:04,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:53:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 00:53:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-12-23 00:53:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:53:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-12-23 00:53:04,070 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 17 [2020-12-23 00:53:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:04,070 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-12-23 00:53:04,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:53:04,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-12-23 00:53:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:53:04,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:04,072 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:04,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:04,278 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:04,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:04,279 INFO L82 PathProgramCache]: Analyzing trace with hash 883368454, now seen corresponding path program 1 times [2020-12-23 00:53:04,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:04,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025334914] [2020-12-23 00:53:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:04,302 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:04,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650278566] [2020-12-23 00:53:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:04,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:53:04,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:53:04,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025334914] [2020-12-23 00:53:04,479 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:04,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650278566] [2020-12-23 00:53:04,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:04,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:53:04,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585191410] [2020-12-23 00:53:04,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:53:04,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:04,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:53:04,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:53:04,485 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 6 states. [2020-12-23 00:53:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:04,590 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-12-23 00:53:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:53:04,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-23 00:53:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:04,592 INFO L225 Difference]: With dead ends: 80 [2020-12-23 00:53:04,592 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:53:04,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:53:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:53:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-12-23 00:53:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 00:53:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-12-23 00:53:04,601 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 27 [2020-12-23 00:53:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:04,601 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-12-23 00:53:04,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:53:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-12-23 00:53:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:53:04,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:04,603 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:04,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:04,816 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash -202296780, now seen corresponding path program 2 times [2020-12-23 00:53:04,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:04,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825310923] [2020-12-23 00:53:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:04,829 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:04,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143199485] [2020-12-23 00:53:04,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:04,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:53:04,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:53:04,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:53:05,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825310923] [2020-12-23 00:53:05,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:05,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143199485] [2020-12-23 00:53:05,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:05,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:53:05,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938498784] [2020-12-23 00:53:05,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:53:05,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:05,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:53:05,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:53:05,003 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 7 states. [2020-12-23 00:53:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:05,112 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-12-23 00:53:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:53:05,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-12-23 00:53:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:05,113 INFO L225 Difference]: With dead ends: 94 [2020-12-23 00:53:05,113 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 00:53:05,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:53:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 00:53:05,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-12-23 00:53:05,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:53:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-12-23 00:53:05,123 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 30 [2020-12-23 00:53:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:05,124 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-12-23 00:53:05,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:53:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-12-23 00:53:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:53:05,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:05,125 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:05,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:05,340 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1717790278, now seen corresponding path program 3 times [2020-12-23 00:53:05,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:05,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253307851] [2020-12-23 00:53:05,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:05,352 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:05,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12710196] [2020-12-23 00:53:05,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:05,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:53:05,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:05,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:53:05,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 00:53:05,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253307851] [2020-12-23 00:53:05,512 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:05,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12710196] [2020-12-23 00:53:05,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:05,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:53:05,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994840992] [2020-12-23 00:53:05,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:53:05,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:05,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:53:05,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:05,515 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 5 states. [2020-12-23 00:53:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:05,619 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-12-23 00:53:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:53:05,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-23 00:53:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:05,623 INFO L225 Difference]: With dead ends: 155 [2020-12-23 00:53:05,623 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 00:53:05,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:05,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 00:53:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2020-12-23 00:53:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 00:53:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-12-23 00:53:05,639 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 33 [2020-12-23 00:53:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:05,639 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-12-23 00:53:05,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:53:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-12-23 00:53:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:53:05,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:05,641 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:05,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:05,855 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:05,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301497, now seen corresponding path program 4 times [2020-12-23 00:53:05,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:05,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919624800] [2020-12-23 00:53:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:05,869 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:05,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93320402] [2020-12-23 00:53:05,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:58,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:53:58,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:58,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:53:58,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-23 00:53:58,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919624800] [2020-12-23 00:53:58,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:58,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93320402] [2020-12-23 00:53:58,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:58,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:53:58,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387710590] [2020-12-23 00:53:58,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:53:58,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:53:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:53:58,438 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 8 states. [2020-12-23 00:53:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:58,567 INFO L93 Difference]: Finished difference Result 148 states and 177 transitions. [2020-12-23 00:53:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:53:58,568 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-12-23 00:53:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:58,569 INFO L225 Difference]: With dead ends: 148 [2020-12-23 00:53:58,569 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 00:53:58,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:53:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 00:53:58,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2020-12-23 00:53:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:53:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-12-23 00:53:58,582 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 54 [2020-12-23 00:53:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:58,582 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-12-23 00:53:58,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:53:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-12-23 00:53:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 00:53:58,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:58,584 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:58,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:53:58,785 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:58,786 INFO L82 PathProgramCache]: Analyzing trace with hash -684722495, now seen corresponding path program 5 times [2020-12-23 00:53:58,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:58,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324057432] [2020-12-23 00:53:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:58,798 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:58,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127567556] [2020-12-23 00:53:58,798 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