/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/init-4-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:48:18,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:48:18,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:48:18,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:48:18,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:48:18,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:48:18,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:48:18,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:48:18,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:48:18,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:48:18,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:48:18,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:48:18,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:48:18,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:48:18,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:48:18,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:48:18,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:48:18,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:48:18,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:48:18,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:48:18,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:48:18,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:48:18,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:48:18,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:48:18,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 10:48:18,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 10:48:18,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 10:48:18,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 10:48:18,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 10:48:19,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 10:48:19,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:48:19,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:48:19,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:48:19,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:48:19,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:48:19,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:48:19,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:48:19,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:48:19,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:48:19,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:48:19,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:48:19,021 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 10:48:19,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:48:19,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:48:19,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:48:19,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:48:19,083 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:48:19,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:48:19,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:48:19,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:48:19,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:48:19,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:48:19,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:48:19,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:48:19,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:48:19,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:48:19,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:48:19,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:48:19,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:48:19,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:48:19,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:48:19,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:48:19,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:48:19,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:48:19,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:48:19,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:48:19,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:48:19,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:48:19,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:48:19,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:48:19,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:48:19,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:48:19,605 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:48:19,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-4-n-u.c [2021-01-06 10:48:19,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8e993d3e7/3b0888bf1f4f43e890c77dee64d450a9/FLAG3645d6d19 [2021-01-06 10:48:20,379 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:48:20,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-4-n-u.c [2021-01-06 10:48:20,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8e993d3e7/3b0888bf1f4f43e890c77dee64d450a9/FLAG3645d6d19 [2021-01-06 10:48:20,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8e993d3e7/3b0888bf1f4f43e890c77dee64d450a9 [2021-01-06 10:48:20,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:48:20,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:48:20,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:48:20,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:48:20,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:48:20,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:48:20" (1/1) ... [2021-01-06 10:48:20,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37909496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:20, skipping insertion in model container [2021-01-06 10:48:20,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:48:20" (1/1) ... [2021-01-06 10:48:20,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:48:20,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:48:20,988 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/init-4-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[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]],[IdentifierExpression[~k~0,]]],[IdentifierExpression[~l~0,]]] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~k~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[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:48:21,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:48:21,033 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:48:21,051 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/init-4-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[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,BinaryExpression[ARITHMUL,BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~q~0,]],IdentifierExpression[~p~0,]],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IdentifierExpression[~j~0,],BinaryExpression[ARITHMUL,BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~q~0,]],IdentifierExpression[~p~0,]]]],BinaryExpression[ARITHMUL,IdentifierExpression[~k~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~q~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~l~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~k~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[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:48:21,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:48:21,131 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:48:21,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21 WrapperNode [2021-01-06 10:48:21,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:48:21,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:48:21,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:48:21,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:48:21,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (1/1) ... [2021-01-06 10:48:21,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (1/1) ... [2021-01-06 10:48:21,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:48:21,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:48:21,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:48:21,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:48:21,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (1/1) ... [2021-01-06 10:48:21,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (1/1) ... [2021-01-06 10:48:21,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (1/1) ... [2021-01-06 10:48:21,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (1/1) ... [2021-01-06 10:48:21,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (1/1) ... [2021-01-06 10:48:21,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (1/1) ... [2021-01-06 10:48:21,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (1/1) ... [2021-01-06 10:48:21,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:48:21,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:48:21,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:48:21,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:48:21,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (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 10:48:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:48:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:48:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:48:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:48:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:48:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:48:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:48:21,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:48:21,817 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-01-06 10:48:21,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:48:21 BoogieIcfgContainer [2021-01-06 10:48:21,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:48:21,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:48:21,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:48:21,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:48:21,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:48:20" (1/3) ... [2021-01-06 10:48:21,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b29c889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:48:21, skipping insertion in model container [2021-01-06 10:48:21,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:48:21" (2/3) ... [2021-01-06 10:48:21,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b29c889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:48:21, skipping insertion in model container [2021-01-06 10:48:21,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:48:21" (3/3) ... [2021-01-06 10:48:21,851 INFO L111 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2021-01-06 10:48:21,861 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:48:21,868 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:48:21,892 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:48:21,930 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:48:21,930 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:48:21,930 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:48:21,930 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:48:21,931 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:48:21,931 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:48:21,931 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:48:21,931 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:48:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2021-01-06 10:48:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:48:21,965 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:21,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:21,967 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:21,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1868122297, now seen corresponding path program 1 times [2021-01-06 10:48:22,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:22,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661699929] [2021-01-06 10:48:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:22,193 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:22,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803051768] [2021-01-06 10:48:22,194 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 10:48:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:48:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2021-01-06 10:48:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:22,389 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 10:48:22,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661699929] [2021-01-06 10:48:22,390 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:22,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803051768] [2021-01-06 10:48:22,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:48:22,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:48:22,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332558320] [2021-01-06 10:48:22,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:48:22,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:22,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:48:22,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:48:22,422 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2021-01-06 10:48:22,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:22,444 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-01-06 10:48:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:48:22,447 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 10:48:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:22,458 INFO L225 Difference]: With dead ends: 48 [2021-01-06 10:48:22,459 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 10:48:22,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 10:48:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 10:48:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 10:48:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 10:48:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 10:48:22,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 10 [2021-01-06 10:48:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:22,512 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 10:48:22,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:48:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 10:48:22,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:48:22,514 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:22,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:22,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:48:22,728 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:22,730 INFO L82 PathProgramCache]: Analyzing trace with hash -58278076, now seen corresponding path program 1 times [2021-01-06 10:48:22,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:22,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523619161] [2021-01-06 10:48:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:22,766 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:22,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379892310] [2021-01-06 10:48:22,767 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 10:48:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:48:22,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:48:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:22,966 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 10:48:22,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523619161] [2021-01-06 10:48:22,969 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:22,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379892310] [2021-01-06 10:48:22,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:48:22,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:48:22,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740724508] [2021-01-06 10:48:22,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:48:22,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:22,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:48:22,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:48:22,978 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 3 states. [2021-01-06 10:48:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:23,011 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 10:48:23,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:48:23,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 10:48:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:23,013 INFO L225 Difference]: With dead ends: 40 [2021-01-06 10:48:23,013 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:48:23,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:48:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:48:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-01-06 10:48:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 10:48:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2021-01-06 10:48:23,021 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 10 [2021-01-06 10:48:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:23,022 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2021-01-06 10:48:23,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:48:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2021-01-06 10:48:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:48:23,023 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:23,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:23,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:23,238 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:23,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1196059767, now seen corresponding path program 1 times [2021-01-06 10:48:23,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:23,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464168824] [2021-01-06 10:48:23,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:23,254 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:23,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912088769] [2021-01-06 10:48:23,255 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 10:48:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:48:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:48:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:48:23,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464168824] [2021-01-06 10:48:23,361 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:23,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912088769] [2021-01-06 10:48:23,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:48:23,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:48:23,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556379570] [2021-01-06 10:48:23,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:48:23,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:23,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:48:23,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:48:23,364 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2021-01-06 10:48:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:23,444 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2021-01-06 10:48:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:48:23,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 10:48:23,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:23,446 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:48:23,447 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 10:48:23,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:48:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 10:48:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-01-06 10:48:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:48:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-01-06 10:48:23,458 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 13 [2021-01-06 10:48:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:23,458 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-01-06 10:48:23,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:48:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-01-06 10:48:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:48:23,460 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:23,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:23,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:23,674 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1301954304, now seen corresponding path program 1 times [2021-01-06 10:48:23,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:23,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959184333] [2021-01-06 10:48:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:23,694 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:23,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327321086] [2021-01-06 10:48:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:48:23,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:48:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:48:23,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959184333] [2021-01-06 10:48:23,822 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:23,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327321086] [2021-01-06 10:48:23,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:48:23,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:48:23,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356102823] [2021-01-06 10:48:23,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:48:23,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:23,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:48:23,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:48:23,825 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 4 states. [2021-01-06 10:48:23,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:23,895 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-01-06 10:48:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:48:23,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-01-06 10:48:23,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:23,901 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:48:23,901 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:48:23,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:48:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:48:23,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2021-01-06 10:48:23,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:48:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-01-06 10:48:23,925 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2021-01-06 10:48:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:23,926 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-01-06 10:48:23,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:48:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-01-06 10:48:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:48:23,927 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:23,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:24,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:24,141 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:24,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1938337909, now seen corresponding path program 1 times [2021-01-06 10:48:24,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:24,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747157354] [2021-01-06 10:48:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:24,157 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:24,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697748929] [2021-01-06 10:48:24,158 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 10:48:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:48:24,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:48:24,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:48:24,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747157354] [2021-01-06 10:48:24,299 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:24,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697748929] [2021-01-06 10:48:24,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:48:24,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:48:24,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34902561] [2021-01-06 10:48:24,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:48:24,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:24,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:48:24,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:48:24,303 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 4 states. [2021-01-06 10:48:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:24,353 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-01-06 10:48:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:48:24,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-01-06 10:48:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:24,355 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:48:24,355 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:48:24,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:48:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:48:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-01-06 10:48:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:48:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-01-06 10:48:24,364 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2021-01-06 10:48:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:24,364 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-01-06 10:48:24,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:48:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-01-06 10:48:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:48:24,366 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:24,366 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] [2021-01-06 10:48:24,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:24,581 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash 582253679, now seen corresponding path program 1 times [2021-01-06 10:48:24,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:24,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586907648] [2021-01-06 10:48:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:24,596 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:24,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349248441] [2021-01-06 10:48:24,597 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 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 10:48:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:48:24,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:48:24,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:48:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586907648] [2021-01-06 10:48:24,740 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:24,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349248441] [2021-01-06 10:48:24,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:48:24,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:48:24,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700947701] [2021-01-06 10:48:24,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:48:24,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:24,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:48:24,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:48:24,746 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2021-01-06 10:48:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:24,831 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-01-06 10:48:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:48:24,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2021-01-06 10:48:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:24,833 INFO L225 Difference]: With dead ends: 64 [2021-01-06 10:48:24,833 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 10:48:24,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 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 10:48:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 10:48:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-01-06 10:48:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:48:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-01-06 10:48:24,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 20 [2021-01-06 10:48:24,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:24,842 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-01-06 10:48:24,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:48:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-01-06 10:48:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:48:24,843 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:24,843 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] [2021-01-06 10:48:25,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:25,057 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:25,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:25,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1411181579, now seen corresponding path program 2 times [2021-01-06 10:48:25,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:25,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393233936] [2021-01-06 10:48:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:25,070 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:25,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301088516] [2021-01-06 10:48:25,070 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 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 10:48:25,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:48:25,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:48:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:48:25,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:48:25,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393233936] [2021-01-06 10:48:25,256 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:25,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301088516] [2021-01-06 10:48:25,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:48:25,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:48:25,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802670623] [2021-01-06 10:48:25,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:48:25,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:25,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:48:25,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:48:25,260 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 6 states. [2021-01-06 10:48:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:25,335 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2021-01-06 10:48:25,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:48:25,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 10:48:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:25,338 INFO L225 Difference]: With dead ends: 74 [2021-01-06 10:48:25,338 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 10:48:25,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:48:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 10:48:25,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-01-06 10:48:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:48:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-01-06 10:48:25,347 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 21 [2021-01-06 10:48:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:25,348 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-01-06 10:48:25,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:48:25,348 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-01-06 10:48:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:48:25,349 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:25,349 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:25,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:25,563 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:25,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1338142703, now seen corresponding path program 3 times [2021-01-06 10:48:25,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:25,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893648991] [2021-01-06 10:48:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:25,576 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:25,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573550640] [2021-01-06 10:48:25,577 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 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 10:48:25,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:48:25,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:48:25,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:48:25,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 10:48:25,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893648991] [2021-01-06 10:48:25,692 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:25,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573550640] [2021-01-06 10:48:25,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:48:25,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:48:25,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344888705] [2021-01-06 10:48:25,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:48:25,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:25,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:48:25,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:48:25,695 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 4 states. [2021-01-06 10:48:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:25,739 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-01-06 10:48:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:48:25,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-01-06 10:48:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:25,741 INFO L225 Difference]: With dead ends: 80 [2021-01-06 10:48:25,741 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 10:48:25,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:48:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 10:48:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2021-01-06 10:48:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:48:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-01-06 10:48:25,764 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 22 [2021-01-06 10:48:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:25,764 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-01-06 10:48:25,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:48:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-01-06 10:48:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 10:48:25,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:25,774 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:25,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:48:25,988 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:25,988 INFO L82 PathProgramCache]: Analyzing trace with hash 142309402, now seen corresponding path program 4 times [2021-01-06 10:48:25,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:25,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418716732] [2021-01-06 10:48:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:25,998 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:25,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349883790] [2021-01-06 10:48:25,999 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 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 10:48:26,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:48:26,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:48:26,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:48:26,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:48:26,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418716732] [2021-01-06 10:48:26,325 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:26,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349883790] [2021-01-06 10:48:26,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:48:26,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:48:26,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479364499] [2021-01-06 10:48:26,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:48:26,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:26,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:48:26,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:48:26,331 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 5 states. [2021-01-06 10:48:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:26,405 INFO L93 Difference]: Finished difference Result 151 states and 191 transitions. [2021-01-06 10:48:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:48:26,406 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2021-01-06 10:48:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:26,407 INFO L225 Difference]: With dead ends: 151 [2021-01-06 10:48:26,407 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 10:48:26,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 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 10:48:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 10:48:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2021-01-06 10:48:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 10:48:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2021-01-06 10:48:26,447 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 34 [2021-01-06 10:48:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:26,448 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2021-01-06 10:48:26,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:48:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2021-01-06 10:48:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 10:48:26,452 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:26,452 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:26,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:26,654 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:26,655 INFO L82 PathProgramCache]: Analyzing trace with hash -824589212, now seen corresponding path program 5 times [2021-01-06 10:48:26,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:26,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321843522] [2021-01-06 10:48:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:26,665 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:26,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220783435] [2021-01-06 10:48:26,666 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 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 10:48:33,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-01-06 10:48:33,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:48:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:48:33,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-01-06 10:48:33,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321843522] [2021-01-06 10:48:33,579 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:33,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220783435] [2021-01-06 10:48:33,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:48:33,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:48:33,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112612498] [2021-01-06 10:48:33,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:48:33,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:33,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:48:33,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:48:33,581 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand 7 states. [2021-01-06 10:48:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:33,673 INFO L93 Difference]: Finished difference Result 180 states and 228 transitions. [2021-01-06 10:48:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:48:33,674 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2021-01-06 10:48:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:33,675 INFO L225 Difference]: With dead ends: 180 [2021-01-06 10:48:33,675 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:48:33,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:48:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:48:33,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2021-01-06 10:48:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 10:48:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2021-01-06 10:48:33,697 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 52 [2021-01-06 10:48:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:33,697 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2021-01-06 10:48:33,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:48:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2021-01-06 10:48:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:48:33,699 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:33,699 INFO L422 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:33,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:33,901 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:33,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:33,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2103931612, now seen corresponding path program 6 times [2021-01-06 10:48:33,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:33,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842900483] [2021-01-06 10:48:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:33,919 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:33,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630323546] [2021-01-06 10:48:33,920 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 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 10:48:34,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 10:48:34,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:48:34,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:48:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 156 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-01-06 10:48:34,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842900483] [2021-01-06 10:48:34,163 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:34,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630323546] [2021-01-06 10:48:34,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:48:34,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:48:34,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985393342] [2021-01-06 10:48:34,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:48:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:48:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:48:34,166 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand 8 states. [2021-01-06 10:48:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:34,289 INFO L93 Difference]: Finished difference Result 202 states and 253 transitions. [2021-01-06 10:48:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:48:34,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2021-01-06 10:48:34,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:34,291 INFO L225 Difference]: With dead ends: 202 [2021-01-06 10:48:34,291 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 10:48:34,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:48:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 10:48:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2021-01-06 10:48:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 10:48:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2021-01-06 10:48:34,312 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 56 [2021-01-06 10:48:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:34,312 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2021-01-06 10:48:34,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:48:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2021-01-06 10:48:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 10:48:34,314 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:34,314 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:34,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:48:34,528 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:34,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:34,529 INFO L82 PathProgramCache]: Analyzing trace with hash -792203548, now seen corresponding path program 7 times [2021-01-06 10:48:34,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:34,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688963915] [2021-01-06 10:48:34,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:34,540 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:34,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003110824] [2021-01-06 10:48:34,541 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 10:48:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:48:34,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:48:34,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 122 proven. 15 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-01-06 10:48:34,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688963915] [2021-01-06 10:48:34,794 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:34,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003110824] [2021-01-06 10:48:34,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:48:34,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:48:34,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292910184] [2021-01-06 10:48:34,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:48:34,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:48:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:48:34,797 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand 9 states. [2021-01-06 10:48:34,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:34,909 INFO L93 Difference]: Finished difference Result 224 states and 278 transitions. [2021-01-06 10:48:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:48:34,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2021-01-06 10:48:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:34,910 INFO L225 Difference]: With dead ends: 224 [2021-01-06 10:48:34,911 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 10:48:34,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:48:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 10:48:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2021-01-06 10:48:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 10:48:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2021-01-06 10:48:34,932 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 60 [2021-01-06 10:48:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:34,932 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2021-01-06 10:48:34,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:48:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2021-01-06 10:48:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 10:48:34,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:34,934 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:35,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:35,150 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:35,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash 136272292, now seen corresponding path program 8 times [2021-01-06 10:48:35,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:35,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697378031] [2021-01-06 10:48:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:35,161 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:35,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517924980] [2021-01-06 10:48:35,161 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 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 10:48:35,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:48:35,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:48:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:48:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 161 proven. 21 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-01-06 10:48:35,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697378031] [2021-01-06 10:48:35,413 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:35,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517924980] [2021-01-06 10:48:35,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:48:35,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:48:35,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45833764] [2021-01-06 10:48:35,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:48:35,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:35,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:48:35,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:48:35,415 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand 10 states. [2021-01-06 10:48:35,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:35,544 INFO L93 Difference]: Finished difference Result 246 states and 303 transitions. [2021-01-06 10:48:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:48:35,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2021-01-06 10:48:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:35,546 INFO L225 Difference]: With dead ends: 246 [2021-01-06 10:48:35,546 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 10:48:35,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:48:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 10:48:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 121. [2021-01-06 10:48:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 10:48:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 150 transitions. [2021-01-06 10:48:35,573 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 150 transitions. Word has length 64 [2021-01-06 10:48:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:35,573 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 150 transitions. [2021-01-06 10:48:35,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:48:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 150 transitions. [2021-01-06 10:48:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 10:48:35,581 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:35,581 INFO L422 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:35,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:48:35,786 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:35,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:35,787 INFO L82 PathProgramCache]: Analyzing trace with hash -883271324, now seen corresponding path program 9 times [2021-01-06 10:48:35,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:35,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399584588] [2021-01-06 10:48:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:35,797 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:35,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379233064] [2021-01-06 10:48:35,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:36,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 10:48:36,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:48:36,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:48:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:48:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 213 proven. 28 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-01-06 10:48:36,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399584588] [2021-01-06 10:48:36,653 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:48:36,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379233064] [2021-01-06 10:48:36,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:48:36,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:48:36,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928946085] [2021-01-06 10:48:36,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:48:36,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:48:36,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:48:36,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:48:36,660 INFO L87 Difference]: Start difference. First operand 121 states and 150 transitions. Second operand 11 states. [2021-01-06 10:48:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:48:36,772 INFO L93 Difference]: Finished difference Result 268 states and 328 transitions. [2021-01-06 10:48:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:48:36,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2021-01-06 10:48:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:48:36,774 INFO L225 Difference]: With dead ends: 268 [2021-01-06 10:48:36,774 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 10:48:36,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:48:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 10:48:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 131. [2021-01-06 10:48:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 10:48:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 162 transitions. [2021-01-06 10:48:36,794 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 162 transitions. Word has length 68 [2021-01-06 10:48:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:48:36,794 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 162 transitions. [2021-01-06 10:48:36,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:48:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 162 transitions. [2021-01-06 10:48:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 10:48:36,796 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:48:36,796 INFO L422 BasicCegarLoop]: trace histogram [32, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:48:37,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:48:37,011 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:48:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:48:37,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1130915364, now seen corresponding path program 10 times [2021-01-06 10:48:37,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:48:37,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264801673] [2021-01-06 10:48:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:48:37,023 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:48:37,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078757179] [2021-01-06 10:48:37,023 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 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 10:49:05,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:49:05,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:49:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:49:05,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:49:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 257 proven. 36 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-01-06 10:49:05,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264801673] [2021-01-06 10:49:05,977 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:49:05,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078757179] [2021-01-06 10:49:05,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:49:05,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:49:05,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307678522] [2021-01-06 10:49:05,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:49:05,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:49:05,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:49:05,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:49:05,980 INFO L87 Difference]: Start difference. First operand 131 states and 162 transitions. Second operand 12 states. [2021-01-06 10:49:06,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:49:06,100 INFO L93 Difference]: Finished difference Result 290 states and 353 transitions. [2021-01-06 10:49:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:49:06,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2021-01-06 10:49:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:49:06,102 INFO L225 Difference]: With dead ends: 290 [2021-01-06 10:49:06,102 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 10:49:06,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:49:06,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 10:49:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2021-01-06 10:49:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 10:49:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2021-01-06 10:49:06,119 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 72 [2021-01-06 10:49:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:49:06,119 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2021-01-06 10:49:06,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:49:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2021-01-06 10:49:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:49:06,121 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:49:06,121 INFO L422 BasicCegarLoop]: trace histogram [36, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:49:06,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:49:06,335 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:49:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:49:06,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1159791588, now seen corresponding path program 11 times [2021-01-06 10:49:06,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:49:06,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986587532] [2021-01-06 10:49:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:49:06,347 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:49:06,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456646204] [2021-01-06 10:49:06,347 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 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 10:50:45,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 10:50:45,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:50:45,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:50:45,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:50:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 531 proven. 45 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-01-06 10:50:45,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986587532] [2021-01-06 10:50:45,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:50:45,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456646204] [2021-01-06 10:50:45,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:50:45,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:50:45,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612248468] [2021-01-06 10:50:45,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:50:45,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:50:45,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:50:45,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:50:45,666 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand 13 states. [2021-01-06 10:50:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:50:45,795 INFO L93 Difference]: Finished difference Result 312 states and 378 transitions. [2021-01-06 10:50:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:50:45,796 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2021-01-06 10:50:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:50:45,797 INFO L225 Difference]: With dead ends: 312 [2021-01-06 10:50:45,797 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 10:50:45,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:50:45,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 10:50:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2021-01-06 10:50:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 10:50:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2021-01-06 10:50:45,818 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 76 [2021-01-06 10:50:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:50:45,819 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2021-01-06 10:50:45,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:50:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2021-01-06 10:50:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 10:50:45,820 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:50:45,820 INFO L422 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:50:46,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:50:46,034 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:50:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:50:46,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2002537820, now seen corresponding path program 12 times [2021-01-06 10:50:46,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:50:46,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528343475] [2021-01-06 10:50:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:50:46,058 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:50:46,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501916087] [2021-01-06 10:50:46,059 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 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