/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-patterns/array23_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:56:10,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:56:10,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:56:10,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:56:10,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:56:10,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:56:10,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:56:10,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:56:10,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:56:10,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:56:10,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:56:10,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:56:10,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:56:10,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:56:10,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:56:10,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:56:10,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:56:10,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:56:10,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:56:10,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:56:10,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:56:10,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:56:10,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:56:10,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:56:10,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:56:10,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:56:10,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:56:10,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:56:10,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:56:10,521 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:56:10,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:56:10,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:56:10,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:56:10,524 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:56:10,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:56:10,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:56:10,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:56:10,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:56:10,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:56:10,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:56:10,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:56:10,525 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:56:10,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:56:10,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:56:10,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:56:10,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:56:10,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:56:10,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:56:10,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:56:10,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:56:10,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:56:10,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:56:10,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:56:10,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:56:10,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:56:10,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:56:10,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:56:10,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:56:10,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:56:10,969 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:56:10,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array23_pattern.c [2021-01-06 10:56:11,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/333914c8a/57e1af3c77314d6ca4de9d0860c184cd/FLAG064de5c75 [2021-01-06 10:56:11,805 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:56:11,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-patterns/array23_pattern.c [2021-01-06 10:56:11,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/333914c8a/57e1af3c77314d6ca4de9d0860c184cd/FLAG064de5c75 [2021-01-06 10:56:12,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/333914c8a/57e1af3c77314d6ca4de9d0860c184cd [2021-01-06 10:56:12,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:56:12,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:56:12,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:56:12,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:56:12,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:56:12,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e1818d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12, skipping insertion in model container [2021-01-06 10:56:12,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:56:12,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:56:12,317 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-patterns/array23_pattern.c[1347,1360] left hand side expression in assignment: lhs: VariableLHS[~ARR_SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~row~0,]]],[IdentifierExpression[~column~0,]]] left hand side expression in assignment: lhs: VariableLHS[~index1~0,] left hand side expression in assignment: lhs: VariableLHS[~index2~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~index1~0,]]],[IdentifierExpression[~index2~0,]]] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMINUS,IdentifierExpression[~ARR_SIZE~0,GLOBAL],IntegerLiteral[1]],IdentifierExpression[~index1~0,]]]],[IdentifierExpression[~index2~0,]]] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2021-01-06 10:56:12,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:56:12,367 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:56:12,387 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-patterns/array23_pattern.c[1347,1360] left hand side expression in assignment: lhs: VariableLHS[~ARR_SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~row~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~column~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~index1~0,] left hand side expression in assignment: lhs: VariableLHS[~index2~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~index1~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~index2~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMINUS,IdentifierExpression[~ARR_SIZE~0,GLOBAL],IntegerLiteral[1]],IdentifierExpression[~index1~0,]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~index2~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2021-01-06 10:56:12,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:56:12,461 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:56:12,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12 WrapperNode [2021-01-06 10:56:12,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:56:12,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:56:12,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:56:12,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:56:12,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:56:12,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:56:12,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:56:12,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:56:12,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (1/1) ... [2021-01-06 10:56:12,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:56:12,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:56:12,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:56:12,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:56:12,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:56:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:56:12,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:56:12,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:56:12,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:56:12,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:56:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:56:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:56:13,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:56:13,308 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-01-06 10:56:13,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:56:13 BoogieIcfgContainer [2021-01-06 10:56:13,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:56:13,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:56:13,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:56:13,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:56:13,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:56:12" (1/3) ... [2021-01-06 10:56:13,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db0726e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:56:13, skipping insertion in model container [2021-01-06 10:56:13,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:56:12" (2/3) ... [2021-01-06 10:56:13,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db0726e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:56:13, skipping insertion in model container [2021-01-06 10:56:13,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:56:13" (3/3) ... [2021-01-06 10:56:13,336 INFO L111 eAbstractionObserver]: Analyzing ICFG array23_pattern.c [2021-01-06 10:56:13,345 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:56:13,352 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:56:13,379 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:56:13,427 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:56:13,428 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:56:13,428 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:56:13,428 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:56:13,428 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:56:13,428 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:56:13,429 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:56:13,429 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:56:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2021-01-06 10:56:13,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:56:13,457 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:13,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:13,459 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:13,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1748886715, now seen corresponding path program 1 times [2021-01-06 10:56:13,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:13,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381999577] [2021-01-06 10:56:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:56:13,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381999577] [2021-01-06 10:56:13,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:56:13,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:56:13,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222071688] [2021-01-06 10:56:13,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:56:13,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:13,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:56:13,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:56:13,668 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2021-01-06 10:56:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:13,689 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2021-01-06 10:56:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:56:13,691 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:56:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:13,700 INFO L225 Difference]: With dead ends: 67 [2021-01-06 10:56:13,700 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:56:13,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:56:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:56:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 10:56:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:56:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-01-06 10:56:13,741 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 11 [2021-01-06 10:56:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:13,741 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-01-06 10:56:13,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:56:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-01-06 10:56:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 10:56:13,743 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:13,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:13,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:56:13,743 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:13,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1811974448, now seen corresponding path program 1 times [2021-01-06 10:56:13,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:13,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554299818] [2021-01-06 10:56:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:13,765 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:13,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447440633] [2021-01-06 10:56:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:13,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:56:13,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:56:13,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554299818] [2021-01-06 10:56:13,992 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:13,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447440633] [2021-01-06 10:56:13,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:56:13,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:56:13,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601475872] [2021-01-06 10:56:14,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:56:14,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:56:14,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:56:14,005 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 5 states. [2021-01-06 10:56:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:14,206 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2021-01-06 10:56:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:56:14,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2021-01-06 10:56:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:14,208 INFO L225 Difference]: With dead ends: 63 [2021-01-06 10:56:14,208 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 10:56:14,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:56:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 10:56:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-01-06 10:56:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:56:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-01-06 10:56:14,219 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 24 [2021-01-06 10:56:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:14,219 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-01-06 10:56:14,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:56:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-01-06 10:56:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:56:14,221 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:14,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:14,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:56:14,435 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:14,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1100083622, now seen corresponding path program 1 times [2021-01-06 10:56:14,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:14,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405202104] [2021-01-06 10:56:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:14,481 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:14,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209854003] [2021-01-06 10:56:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:14,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:56:14,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:56:14,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405202104] [2021-01-06 10:56:14,688 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:14,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209854003] [2021-01-06 10:56:14,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:56:14,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:56:14,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149814446] [2021-01-06 10:56:14,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:56:14,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:14,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:56:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:56:14,702 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 4 states. [2021-01-06 10:56:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:14,833 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2021-01-06 10:56:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:56:14,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-01-06 10:56:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:14,836 INFO L225 Difference]: With dead ends: 65 [2021-01-06 10:56:14,836 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 10:56:14,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:56:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 10:56:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-01-06 10:56:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 10:56:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-01-06 10:56:14,853 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 30 [2021-01-06 10:56:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:14,854 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-01-06 10:56:14,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:56:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-01-06 10:56:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 10:56:14,855 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:14,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:15,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:15,070 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:15,071 INFO L82 PathProgramCache]: Analyzing trace with hash 418919962, now seen corresponding path program 1 times [2021-01-06 10:56:15,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:15,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253112713] [2021-01-06 10:56:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:15,089 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:15,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248121670] [2021-01-06 10:56:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:56:15,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:56:15,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:56:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:56:15,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253112713] [2021-01-06 10:56:15,247 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:56:15,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248121670] [2021-01-06 10:56:15,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:56:15,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:56:15,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036384869] [2021-01-06 10:56:15,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:56:15,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:56:15,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:56:15,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:56:15,250 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 6 states. [2021-01-06 10:56:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:56:15,389 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2021-01-06 10:56:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:56:15,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2021-01-06 10:56:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:56:15,391 INFO L225 Difference]: With dead ends: 72 [2021-01-06 10:56:15,391 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 10:56:15,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:56:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 10:56:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-01-06 10:56:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:56:15,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-01-06 10:56:15,398 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 34 [2021-01-06 10:56:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:56:15,399 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-01-06 10:56:15,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:56:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-01-06 10:56:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 10:56:15,400 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:56:15,400 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, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:56:15,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:56:15,614 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:56:15,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:56:15,614 INFO L82 PathProgramCache]: Analyzing trace with hash 842854106, now seen corresponding path program 2 times [2021-01-06 10:56:15,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:56:15,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403279095] [2021-01-06 10:56:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:56:15,638 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:56:15,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157437872] [2021-01-06 10:56:15,639 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