/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/min-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:57:31,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:57:31,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:57:31,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:57:31,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:57:31,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:57:31,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:57:31,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:57:31,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:57:31,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:57:31,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:57:31,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:57:31,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:57:31,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:57:31,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:57:31,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:57:31,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:57:31,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:57:31,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:57:31,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:57:31,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:57:31,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:57:31,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:57:31,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:57:31,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:57:31,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:57:31,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:57:31,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:57:31,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:57:31,622 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:57:31,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:57:31,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:57:31,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:57:31,625 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:57:31,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:57:31,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:57:31,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:57:31,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:57:31,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:57:31,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:57:31,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:57:31,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:57:31,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:57:31,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:57:31,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:57:31,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:57:31,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:57:31,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:57:31,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:57:31,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:57:31,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:57:31,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:57:31,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:57:31,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:57:31,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:57:32,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:57:32,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:57:32,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:57:32,072 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:57:32,073 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:57:32,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2020-12-23 00:57:32,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/21b95d20f/cf983cb94fbf4bd5bb2d5ff418407b1c/FLAG658ee29e9 [2020-12-23 00:57:32,791 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:57:32,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2020-12-23 00:57:32,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/21b95d20f/cf983cb94fbf4bd5bb2d5ff418407b1c/FLAG658ee29e9 [2020-12-23 00:57:33,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/21b95d20f/cf983cb94fbf4bd5bb2d5ff418407b1c [2020-12-23 00:57:33,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:57:33,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:57:33,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:57:33,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:57:33,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:57:33,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ef1330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33, skipping insertion in model container [2020-12-23 00:57:33,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:57:33,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:57:33,368 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/min-3-n-u.c[321,334] 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[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]],[IdentifierExpression[~k~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[~min~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[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~min~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[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~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,] [2020-12-23 00:57:33,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:57:33,417 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:57:33,433 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/min-3-n-u.c[321,334] 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[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~p~0,]],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IdentifierExpression[~j~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~p~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~k~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[~min~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[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~min~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[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~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,] [2020-12-23 00:57:33,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:57:33,470 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:57:33,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33 WrapperNode [2020-12-23 00:57:33,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:57:33,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:57:33,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:57:33,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:57:33,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:57:33,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:57:33,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:57:33,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:57:33,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (1/1) ... [2020-12-23 00:57:33,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:57:33,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:57:33,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:57:33,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:57:33,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:57:33,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:57:33,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:57:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:57:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:57:33,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:57:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:57:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:57:34,177 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:57:34,178 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:57:34,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:57:34 BoogieIcfgContainer [2020-12-23 00:57:34,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:57:34,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:57:34,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:57:34,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:57:34,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:57:33" (1/3) ... [2020-12-23 00:57:34,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dbdab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:57:34, skipping insertion in model container [2020-12-23 00:57:34,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:33" (2/3) ... [2020-12-23 00:57:34,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dbdab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:57:34, skipping insertion in model container [2020-12-23 00:57:34,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:57:34" (3/3) ... [2020-12-23 00:57:34,208 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2020-12-23 00:57:34,224 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:57:34,236 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:57:34,278 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:57:34,311 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:57:34,311 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:57:34,311 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:57:34,312 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:57:34,312 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:57:34,312 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:57:34,312 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:57:34,312 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:57:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-23 00:57:34,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:57:34,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:34,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:34,343 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:34,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2020-12-23 00:57:34,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:34,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305455063] [2020-12-23 00:57:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:34,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:34,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373483833] [2020-12-23 00:57:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:34,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-23 00:57:34,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:57:34,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305455063] [2020-12-23 00:57:34,681 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:34,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373483833] [2020-12-23 00:57:34,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:34,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:57:34,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085056587] [2020-12-23 00:57:34,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:57:34,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:57:34,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:57:34,709 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-12-23 00:57:34,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:34,733 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2020-12-23 00:57:34,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:57:34,735 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 00:57:34,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:34,746 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:57:34,747 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 00:57:34,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:57:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 00:57:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 00:57:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 00:57:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2020-12-23 00:57:34,799 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2020-12-23 00:57:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:34,800 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-12-23 00:57:34,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:57:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2020-12-23 00:57:34,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:57:34,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:34,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:35,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:57:35,016 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:35,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:35,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2020-12-23 00:57:35,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:35,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618258034] [2020-12-23 00:57:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:35,049 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:35,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182069447] [2020-12-23 00:57:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:35,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:57:35,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:57:35,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618258034] [2020-12-23 00:57:35,219 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:35,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182069447] [2020-12-23 00:57:35,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:35,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:57:35,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497990266] [2020-12-23 00:57:35,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:57:35,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:57:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:57:35,225 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 3 states. [2020-12-23 00:57:35,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:35,271 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2020-12-23 00:57:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:57:35,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-23 00:57:35,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:35,273 INFO L225 Difference]: With dead ends: 48 [2020-12-23 00:57:35,273 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:57:35,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:57:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:57:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-12-23 00:57:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:57:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2020-12-23 00:57:35,293 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2020-12-23 00:57:35,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:35,294 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2020-12-23 00:57:35,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:57:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2020-12-23 00:57:35,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:57:35,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:35,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:35,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:35,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:35,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2020-12-23 00:57:35,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:35,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509242993] [2020-12-23 00:57:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:35,547 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:35,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046454416] [2020-12-23 00:57:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:35,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:57:35,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:57:35,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509242993] [2020-12-23 00:57:35,642 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:35,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046454416] [2020-12-23 00:57:35,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:35,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:57:35,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540352781] [2020-12-23 00:57:35,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:57:35,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:35,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:57:35,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:35,646 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 4 states. [2020-12-23 00:57:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:35,737 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2020-12-23 00:57:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:57:35,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 00:57:35,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:35,739 INFO L225 Difference]: With dead ends: 67 [2020-12-23 00:57:35,740 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 00:57:35,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 00:57:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2020-12-23 00:57:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:57:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-12-23 00:57:35,750 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2020-12-23 00:57:35,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:35,750 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-12-23 00:57:35,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:57:35,750 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-12-23 00:57:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:57:35,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:35,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:35,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:35,968 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:35,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2020-12-23 00:57:35,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:35,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181018045] [2020-12-23 00:57:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:35,982 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:35,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169390159] [2020-12-23 00:57:35,983 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 [2020-12-23 00:57:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:36,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:57:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:57:36,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181018045] [2020-12-23 00:57:36,088 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:36,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169390159] [2020-12-23 00:57:36,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:36,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:57:36,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792068378] [2020-12-23 00:57:36,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:57:36,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:36,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:57:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:36,092 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 4 states. [2020-12-23 00:57:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:36,179 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-12-23 00:57:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:57:36,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-23 00:57:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:36,181 INFO L225 Difference]: With dead ends: 67 [2020-12-23 00:57:36,182 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 00:57:36,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 00:57:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-12-23 00:57:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 00:57:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-12-23 00:57:36,192 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2020-12-23 00:57:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:36,193 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-12-23 00:57:36,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:57:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-12-23 00:57:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 00:57:36,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:36,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:36,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:36,408 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:36,410 INFO L82 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2020-12-23 00:57:36,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:36,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022392901] [2020-12-23 00:57:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:36,422 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:36,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795380080] [2020-12-23 00:57:36,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:36,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:57:36,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:57:36,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022392901] [2020-12-23 00:57:36,622 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:36,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795380080] [2020-12-23 00:57:36,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:36,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:57:36,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234949126] [2020-12-23 00:57:36,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:57:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:57:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:57:36,639 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 5 states. [2020-12-23 00:57:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:36,761 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2020-12-23 00:57:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:57:36,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 00:57:36,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:36,763 INFO L225 Difference]: With dead ends: 79 [2020-12-23 00:57:36,763 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:57:36,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:57:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:57:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-12-23 00:57:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 00:57:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-12-23 00:57:36,774 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 18 [2020-12-23 00:57:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:36,774 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-12-23 00:57:36,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:57:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-12-23 00:57:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:57:36,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:36,776 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:36,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:36,980 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1771086529, now seen corresponding path program 2 times [2020-12-23 00:57:36,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:36,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496989339] [2020-12-23 00:57:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:36,994 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:36,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559462855] [2020-12-23 00:57:36,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:37,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:57:37,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:57:37,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:57:37,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496989339] [2020-12-23 00:57:37,118 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:37,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559462855] [2020-12-23 00:57:37,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:37,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:57:37,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229143659] [2020-12-23 00:57:37,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:57:37,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:37,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:57:37,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:37,125 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 4 states. [2020-12-23 00:57:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:37,182 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2020-12-23 00:57:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:57:37,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-23 00:57:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:37,184 INFO L225 Difference]: With dead ends: 87 [2020-12-23 00:57:37,184 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:57:37,185 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 [2020-12-23 00:57:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:57:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2020-12-23 00:57:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 00:57:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-12-23 00:57:37,195 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 19 [2020-12-23 00:57:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:37,196 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-12-23 00:57:37,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:57:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-12-23 00:57:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 00:57:37,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:37,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:37,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:37,413 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:37,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:37,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1618381713, now seen corresponding path program 1 times [2020-12-23 00:57:37,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:37,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848283539] [2020-12-23 00:57:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:37,428 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:37,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325853684] [2020-12-23 00:57:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:37,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:57:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:57:37,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848283539] [2020-12-23 00:57:37,627 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:37,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325853684] [2020-12-23 00:57:37,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:37,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:57:37,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387398118] [2020-12-23 00:57:37,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:57:37,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:37,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:57:37,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:57:37,632 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2020-12-23 00:57:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:37,724 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2020-12-23 00:57:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:57:37,725 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-12-23 00:57:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:37,726 INFO L225 Difference]: With dead ends: 95 [2020-12-23 00:57:37,726 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 00:57:37,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:57:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 00:57:37,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-12-23 00:57:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 00:57:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-12-23 00:57:37,737 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 31 [2020-12-23 00:57:37,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:37,737 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-12-23 00:57:37,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:57:37,737 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-12-23 00:57:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:57:37,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:37,739 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:37,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:37,953 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:37,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:37,954 INFO L82 PathProgramCache]: Analyzing trace with hash -440379608, now seen corresponding path program 2 times [2020-12-23 00:57:37,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:37,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871003728] [2020-12-23 00:57:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:37,965 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:37,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142158746] [2020-12-23 00:57:37,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:38,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:57:38,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:57:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:57:38,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871003728] [2020-12-23 00:57:38,146 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:38,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142158746] [2020-12-23 00:57:38,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:38,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:57:38,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772036986] [2020-12-23 00:57:38,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:57:38,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:38,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:57:38,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:57:38,153 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 7 states. [2020-12-23 00:57:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:38,283 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2020-12-23 00:57:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:57:38,283 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-23 00:57:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:38,285 INFO L225 Difference]: With dead ends: 111 [2020-12-23 00:57:38,285 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 00:57:38,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:57:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 00:57:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2020-12-23 00:57:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:57:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-12-23 00:57:38,308 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 35 [2020-12-23 00:57:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:38,309 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-12-23 00:57:38,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:57:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-12-23 00:57:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:57:38,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:38,310 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:38,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:57:38,524 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:38,525 INFO L82 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 3 times [2020-12-23 00:57:38,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:38,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745716616] [2020-12-23 00:57:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:38,537 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:38,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363168042] [2020-12-23 00:57:38,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:38,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:57:38,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:38,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:57:38,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:57:38,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745716616] [2020-12-23 00:57:38,695 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:38,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363168042] [2020-12-23 00:57:38,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:38,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 00:57:38,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297917629] [2020-12-23 00:57:38,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:57:38,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:38,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:57:38,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:38,699 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2020-12-23 00:57:38,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:38,749 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2020-12-23 00:57:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:57:38,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-12-23 00:57:38,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:38,753 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:57:38,753 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:57:38,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:57:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-12-23 00:57:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:57:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-12-23 00:57:38,766 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 39 [2020-12-23 00:57:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:38,766 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-12-23 00:57:38,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:57:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-12-23 00:57:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:57:38,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:38,768 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:38,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:38,984 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:38,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1913562003, now seen corresponding path program 4 times [2020-12-23 00:57:38,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:38,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371076682] [2020-12-23 00:57:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:38,997 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:38,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483398977] [2020-12-23 00:57:38,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:39,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:57:39,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:39,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:57:39,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:58:14,387 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:14,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:14,404 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:14,408 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:58:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 0 refuted. 6 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 00:58:14,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371076682] [2020-12-23 00:58:14,508 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:14,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483398977] [2020-12-23 00:58:14,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:58:14,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 00:58:14,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830911305] [2020-12-23 00:58:14,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:58:14,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:58:14,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=139, Unknown=16, NotChecked=0, Total=210 [2020-12-23 00:58:14,510 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 15 states. [2020-12-23 00:58:25,239 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 42 [2020-12-23 00:58:27,615 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 01:00:00,153 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-23 01:00:22,790 WARN L197 SmtUtils]: Spent 6.27 s on a formula simplification that was a NOOP. DAG size: 76 [2020-12-23 01:00:45,916 WARN L197 SmtUtils]: Spent 12.77 s on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-12-23 01:01:02,469 WARN L197 SmtUtils]: Spent 8.34 s on a formula simplification that was a NOOP. DAG size: 88 [2020-12-23 01:01:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:01:14,977 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2020-12-23 01:01:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:01:14,978 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-12-23 01:01:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:01:14,979 INFO L225 Difference]: With dead ends: 110 [2020-12-23 01:01:14,979 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 01:01:14,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 134.1s TimeCoverageRelationStatistics Valid=120, Invalid=339, Unknown=47, NotChecked=0, Total=506 [2020-12-23 01:01:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 01:01:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2020-12-23 01:01:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 01:01:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2020-12-23 01:01:15,005 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 49 [2020-12-23 01:01:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:01:15,006 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2020-12-23 01:01:15,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:01:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2020-12-23 01:01:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:01:15,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:01:15,007 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:01:15,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:01:15,209 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:01:15,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:01:15,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1794599279, now seen corresponding path program 1 times [2020-12-23 01:01:15,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:01:15,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930981754] [2020-12-23 01:01:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:01:15,226 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:01:15,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400927256] [2020-12-23 01:01:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:01:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:01:15,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:01:15,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:01:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 01:01:15,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930981754] [2020-12-23 01:01:15,485 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:01:15,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400927256] [2020-12-23 01:01:15,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:01:15,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 01:01:15,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477505915] [2020-12-23 01:01:15,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:01:15,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:01:15,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:01:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:01:15,492 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand 8 states. [2020-12-23 01:01:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:01:15,689 INFO L93 Difference]: Finished difference Result 235 states and 306 transitions. [2020-12-23 01:01:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:01:15,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-12-23 01:01:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:01:15,691 INFO L225 Difference]: With dead ends: 235 [2020-12-23 01:01:15,691 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 01:01:15,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:01:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 01:01:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2020-12-23 01:01:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 01:01:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2020-12-23 01:01:15,718 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 49 [2020-12-23 01:01:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:01:15,720 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2020-12-23 01:01:15,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:01:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2020-12-23 01:01:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 01:01:15,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:01:15,724 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:01:15,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 01:01:15,925 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:01:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:01:15,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1853245373, now seen corresponding path program 2 times [2020-12-23 01:01:15,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:01:15,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091212883] [2020-12-23 01:01:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:01:15,936 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:01:15,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458931046] [2020-12-23 01:01:15,936 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 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 [2020-12-23 01:01:16,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:01:16,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:01:16,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:01:16,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:01:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-23 01:01:16,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091212883] [2020-12-23 01:01:16,241 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:01:16,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458931046] [2020-12-23 01:01:16,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:01:16,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 01:01:16,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110346483] [2020-12-23 01:01:16,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:01:16,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:01:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:01:16,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:01:16,244 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand 9 states. [2020-12-23 01:01:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:01:16,483 INFO L93 Difference]: Finished difference Result 271 states and 351 transitions. [2020-12-23 01:01:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:01:16,484 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-12-23 01:01:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:01:16,485 INFO L225 Difference]: With dead ends: 271 [2020-12-23 01:01:16,485 INFO L226 Difference]: Without dead ends: 159 [2020-12-23 01:01:16,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:01:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-23 01:01:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 133. [2020-12-23 01:01:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 01:01:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 172 transitions. [2020-12-23 01:01:16,503 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 172 transitions. Word has length 54 [2020-12-23 01:01:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:01:16,504 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 172 transitions. [2020-12-23 01:01:16,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:01:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 172 transitions. [2020-12-23 01:01:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 01:01:16,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:01:16,505 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:01:16,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:01:16,721 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:01:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:01:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash -32752209, now seen corresponding path program 3 times [2020-12-23 01:01:16,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:01:16,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209133442] [2020-12-23 01:01:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:01:16,736 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:01:16,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728364977] [2020-12-23 01:01:16,736 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 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 [2020-12-23 01:01:16,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 01:01:16,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:01:16,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:01:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:01:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-23 01:01:16,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209133442] [2020-12-23 01:01:16,931 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:01:16,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728364977] [2020-12-23 01:01:16,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:01:16,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 01:01:16,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904493726] [2020-12-23 01:01:16,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:01:16,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:01:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:01:16,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:01:16,934 INFO L87 Difference]: Start difference. First operand 133 states and 172 transitions. Second operand 5 states. [2020-12-23 01:01:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:01:17,060 INFO L93 Difference]: Finished difference Result 370 states and 484 transitions. [2020-12-23 01:01:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:01:17,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-12-23 01:01:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:01:17,064 INFO L225 Difference]: With dead ends: 370 [2020-12-23 01:01:17,064 INFO L226 Difference]: Without dead ends: 338 [2020-12-23 01:01:17,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:01:17,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-12-23 01:01:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 157. [2020-12-23 01:01:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 01:01:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 204 transitions. [2020-12-23 01:01:17,090 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 204 transitions. Word has length 59 [2020-12-23 01:01:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:01:17,091 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 204 transitions. [2020-12-23 01:01:17,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:01:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 204 transitions. [2020-12-23 01:01:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 01:01:17,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:01:17,093 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:01:17,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:01:17,308 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:01:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:01:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1244819935, now seen corresponding path program 4 times [2020-12-23 01:01:17,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:01:17,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131909375] [2020-12-23 01:01:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:01:17,319 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:01:17,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408589407] [2020-12-23 01:01:17,319 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 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 [2020-12-23 01:01:17,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:01:17,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:01:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:01:17,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:01:17,533 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 01:01:17,536 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:01:17,540 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:01:17,541 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:01:17,541 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 01:01:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2020-12-23 01:01:17,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131909375] [2020-12-23 01:01:17,616 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:01:17,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408589407] [2020-12-23 01:01:17,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:01:17,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 01:01:17,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385925772] [2020-12-23 01:01:17,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:01:17,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:01:17,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:01:17,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:01:17,618 INFO L87 Difference]: Start difference. First operand 157 states and 204 transitions. Second operand 6 states. [2020-12-23 01:01:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:01:17,839 INFO L93 Difference]: Finished difference Result 326 states and 430 transitions. [2020-12-23 01:01:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:01:17,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 01:01:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:01:17,844 INFO L225 Difference]: With dead ends: 326 [2020-12-23 01:01:17,844 INFO L226 Difference]: Without dead ends: 199 [2020-12-23 01:01:17,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:01:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-23 01:01:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 159. [2020-12-23 01:01:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 01:01:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 206 transitions. [2020-12-23 01:01:17,866 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 206 transitions. Word has length 83 [2020-12-23 01:01:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:01:17,866 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 206 transitions. [2020-12-23 01:01:17,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:01:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 206 transitions. [2020-12-23 01:01:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 01:01:17,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:01:17,868 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:01:18,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:01:18,083 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:01:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:01:18,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1511807331, now seen corresponding path program 5 times [2020-12-23 01:01:18,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:01:18,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55186959] [2020-12-23 01:01:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:01:18,102 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:01:18,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202131802] [2020-12-23 01:01:18,103 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 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