/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-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:57:30,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:57:30,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:57:30,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:57:30,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:57:30,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:57:30,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:57:30,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:57:30,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:57:30,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:57:30,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:57:30,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:57:30,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:57:30,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:57:30,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:57:30,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:57:30,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:57:30,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:57:30,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:57:30,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:57:30,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:57:30,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:57:30,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:57:30,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:57:30,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 00:57:30,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 00:57:30,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 00:57:30,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 00:57:30,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 00:57:30,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 00:57:30,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 00:57:30,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 00:57:30,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 00:57:30,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 00:57:30,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 00:57:30,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 00:57:30,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 00:57:30,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 00:57:30,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:57:30,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:57:30,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:57:30,470 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 00:57:30,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:57:30,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:57:30,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:57:30,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:57:30,529 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:57:30,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:57:30,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:57:30,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:57:30,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:57:30,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:57:30,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:57:30,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:57:30,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:57:30,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:57:30,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:57:30,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:57:30,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:57:30,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:57:30,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:57:30,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:57:30,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:57:30,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:57:30,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:57:30,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:57:30,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:57:30,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:57:30,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:57:31,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:57:31,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:57:31,037 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:57:31,038 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:57:31,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-2-u.c [2020-12-23 00:57:31,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1e746daa/c2fa4265e0e64c2b83e193a7800e3432/FLAGe9c64be2f [2020-12-23 00:57:31,699 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:57:31,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-2-u.c [2020-12-23 00:57:31,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1e746daa/c2fa4265e0e64c2b83e193a7800e3432/FLAGe9c64be2f [2020-12-23 00:57:32,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1e746daa/c2fa4265e0e64c2b83e193a7800e3432 [2020-12-23 00:57:32,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:57:32,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:57:32,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:57:32,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:57:32,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:57:32,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fc70846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32, skipping insertion in model container [2020-12-23 00:57:32,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:57:32,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:57:32,380 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-2-u.c[319,332] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: 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[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~j~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[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:57:32,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:57:32,448 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:57:32,466 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-2-u.c[319,332] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: 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[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~j~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[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:57:32,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:57:32,523 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:57:32,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32 WrapperNode [2020-12-23 00:57:32,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:57:32,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:57:32,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:57:32,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:57:32,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:57:32,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:57:32,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:57:32,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:57:32,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (1/1) ... [2020-12-23 00:57:32,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:57:32,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:57:32,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:57:32,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:57:32,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (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 00:57:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:57:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:57:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:57:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:57:32,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:57:32,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:57:32,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:57:33,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:57:33,190 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 00:57:33,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:57:33 BoogieIcfgContainer [2020-12-23 00:57:33,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:57:33,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:57:33,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:57:33,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:57:33,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:57:32" (1/3) ... [2020-12-23 00:57:33,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d93dd9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:57:33, skipping insertion in model container [2020-12-23 00:57:33,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:57:32" (2/3) ... [2020-12-23 00:57:33,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d93dd9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:57:33, skipping insertion in model container [2020-12-23 00:57:33,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:57:33" (3/3) ... [2020-12-23 00:57:33,204 INFO L111 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2020-12-23 00:57:33,220 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:57:33,234 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:57:33,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:57:33,333 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:57:33,333 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:57:33,333 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:57:33,334 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:57:33,334 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:57:33,334 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:57:33,334 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:57:33,334 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:57:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-23 00:57:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:57:33,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:33,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:33,358 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:33,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2020-12-23 00:57:33,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:33,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839152370] [2020-12-23 00:57:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:33,491 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:33,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097922778] [2020-12-23 00:57:33,492 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 00:57:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:33,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:57:33,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:33,694 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 00:57:33,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839152370] [2020-12-23 00:57:33,695 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:33,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097922778] [2020-12-23 00:57:33,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:33,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:57:33,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441585475] [2020-12-23 00:57:33,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:57:33,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:33,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:57:33,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:57:33,722 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-12-23 00:57:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:33,781 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2020-12-23 00:57:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:57:33,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:57:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:33,792 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:57:33,792 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 00:57:33,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:57:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 00:57:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-23 00:57:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:57:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-12-23 00:57:33,837 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2020-12-23 00:57:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:33,837 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-12-23 00:57:33,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:57:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2020-12-23 00:57:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:57:33,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:33,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:34,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:57:34,053 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2020-12-23 00:57:34,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:34,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687656901] [2020-12-23 00:57:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:34,071 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:34,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221855560] [2020-12-23 00:57:34,071 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 00:57:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:57:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:34,183 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 00:57:34,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687656901] [2020-12-23 00:57:34,184 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:34,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221855560] [2020-12-23 00:57:34,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:34,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:57:34,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494702745] [2020-12-23 00:57:34,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:57:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:34,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:57:34,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:34,189 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 4 states. [2020-12-23 00:57:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:34,254 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2020-12-23 00:57:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:57:34,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 00:57:34,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:34,256 INFO L225 Difference]: With dead ends: 49 [2020-12-23 00:57:34,256 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:57:34,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:57:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-12-23 00:57:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:57:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-12-23 00:57:34,265 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2020-12-23 00:57:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:34,265 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-12-23 00:57:34,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:57:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-12-23 00:57:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:57:34,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:34,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:34,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:34,481 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2020-12-23 00:57:34,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:34,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968075115] [2020-12-23 00:57:34,483 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 00:57:34,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125221799] [2020-12-23 00:57:34,496 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 00:57:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:57:34,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:57:34,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968075115] [2020-12-23 00:57:34,600 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:34,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125221799] [2020-12-23 00:57:34,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:34,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:57:34,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757815721] [2020-12-23 00:57:34,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:57:34,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:57:34,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:57:34,603 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 5 states. [2020-12-23 00:57:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:34,684 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2020-12-23 00:57:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:57:34,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 00:57:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:34,686 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:57:34,686 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 00:57:34,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 00:57:34,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 00:57:34,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-12-23 00:57:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:57:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-23 00:57:34,696 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2020-12-23 00:57:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:34,696 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-23 00:57:34,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:57:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-23 00:57:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:57:34,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:34,698 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:34,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:34,913 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash -477019482, now seen corresponding path program 2 times [2020-12-23 00:57:34,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:34,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151238451] [2020-12-23 00:57:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:34,937 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:34,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962852296] [2020-12-23 00:57:34,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:34,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:57:34,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:34,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:57:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:57:35,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151238451] [2020-12-23 00:57:35,023 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:35,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962852296] [2020-12-23 00:57:35,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:57:35,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:57:35,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719566163] [2020-12-23 00:57:35,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:57:35,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:57:35,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:35,026 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2020-12-23 00:57:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:35,095 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-12-23 00:57:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:57:35,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-23 00:57:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:35,098 INFO L225 Difference]: With dead ends: 66 [2020-12-23 00:57:35,098 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 00:57:35,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 00:57:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2020-12-23 00:57:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:57:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-12-23 00:57:35,120 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 15 [2020-12-23 00:57:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:35,120 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-12-23 00:57:35,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:57:35,120 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-12-23 00:57:35,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 00:57:35,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:35,122 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] [2020-12-23 00:57:35,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:35,337 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:35,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1114279158, now seen corresponding path program 1 times [2020-12-23 00:57:35,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:35,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966603089] [2020-12-23 00:57:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:35,360 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:35,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768370415] [2020-12-23 00:57:35,363 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 00:57:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:57:35,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:57:35,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:57:35,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966603089] [2020-12-23 00:57:35,527 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:35,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768370415] [2020-12-23 00:57:35,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:35,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:57:35,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592931592] [2020-12-23 00:57:35,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:57:35,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:35,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:57:35,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:57:35,531 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 6 states. [2020-12-23 00:57:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:35,645 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-12-23 00:57:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:57:35,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-12-23 00:57:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:35,647 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:57:35,648 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:57:35,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 00:57:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:57:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-12-23 00:57:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:57:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-12-23 00:57:35,674 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2020-12-23 00:57:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:35,674 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-12-23 00:57:35,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:57:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-12-23 00:57:35,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:57:35,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:35,676 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] [2020-12-23 00:57:35,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:35,890 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1632092484, now seen corresponding path program 2 times [2020-12-23 00:57:35,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:35,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479854917] [2020-12-23 00:57:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:35,904 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:35,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876991229] [2020-12-23 00:57:35,904 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 00:57:35,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:57:35,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:35,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:57:35,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:57:36,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479854917] [2020-12-23 00:57:36,081 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:36,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876991229] [2020-12-23 00:57:36,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:36,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:57:36,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556317883] [2020-12-23 00:57:36,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:57:36,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:36,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:57:36,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:57:36,087 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 7 states. [2020-12-23 00:57:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:36,207 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2020-12-23 00:57:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:57:36,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-12-23 00:57:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:36,210 INFO L225 Difference]: With dead ends: 93 [2020-12-23 00:57:36,211 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 00:57:36,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 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 00:57:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 00:57:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-12-23 00:57:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:57:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-12-23 00:57:36,221 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 28 [2020-12-23 00:57:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:36,222 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-12-23 00:57:36,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:57:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-12-23 00:57:36,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:57:36,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:36,223 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] [2020-12-23 00:57:36,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:36,437 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:36,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 3 times [2020-12-23 00:57:36,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:36,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300415393] [2020-12-23 00:57:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:36,451 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:36,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391577862] [2020-12-23 00:57:36,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:36,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:57:36,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:36,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:57:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 00:57:36,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300415393] [2020-12-23 00:57:36,598 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:36,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391577862] [2020-12-23 00:57:36,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:36,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 00:57:36,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224135202] [2020-12-23 00:57:36,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:57:36,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:36,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:57:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:57:36,602 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 4 states. [2020-12-23 00:57:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:36,650 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2020-12-23 00:57:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:57:36,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-12-23 00:57:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:36,654 INFO L225 Difference]: With dead ends: 93 [2020-12-23 00:57:36,654 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 00:57:36,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 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 00:57:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 00:57:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-12-23 00:57:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:57:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-12-23 00:57:36,668 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 32 [2020-12-23 00:57:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:36,669 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-12-23 00:57:36,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:57:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-12-23 00:57:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:57:36,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:36,674 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:36,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:36,888 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash -709845727, now seen corresponding path program 4 times [2020-12-23 00:57:36,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:36,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229365214] [2020-12-23 00:57:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:36,900 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:36,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362208980] [2020-12-23 00:57:36,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:57:36,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:57:36,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:57:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:57:36,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:57:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 00:57:37,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229365214] [2020-12-23 00:57:37,098 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:57:37,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362208980] [2020-12-23 00:57:37,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:57:37,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:57:37,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710199686] [2020-12-23 00:57:37,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:57:37,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:57:37,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:57:37,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:57:37,101 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 9 states. [2020-12-23 00:57:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:57:37,320 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2020-12-23 00:57:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:57:37,320 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-12-23 00:57:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:57:37,321 INFO L225 Difference]: With dead ends: 145 [2020-12-23 00:57:37,321 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 00:57:37,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:57:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 00:57:37,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 67. [2020-12-23 00:57:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 00:57:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-12-23 00:57:37,333 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 39 [2020-12-23 00:57:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:57:37,334 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-12-23 00:57:37,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:57:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-12-23 00:57:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:57:37,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:57:37,335 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:57:37,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:57:37,551 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:57:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:57:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1528313637, now seen corresponding path program 5 times [2020-12-23 00:57:37,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:57:37,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653005257] [2020-12-23 00:57:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:57:37,564 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:57:37,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756389667] [2020-12-23 00:57:37,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true