/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/copy-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:46:08,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:46:08,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:46:08,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:46:08,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:46:08,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:46:08,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:46:08,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:46:08,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:46:08,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:46:08,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:46:08,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:46:08,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:46:08,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:46:08,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:46:08,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:46:08,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:46:08,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:46:08,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:46:08,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:46:08,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:46:08,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:46:08,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:46:08,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:46:08,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:46:08,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:46:08,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:46:08,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:46:08,364 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 10:46:08,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:46:08,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:46:08,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:46:08,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:46:08,440 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:46:08,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:46:08,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:46:08,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:46:08,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:46:08,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:46:08,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:46:08,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:46:08,446 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:46:08,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:46:08,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:46:08,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:46:08,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:46:08,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:46:08,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:46:08,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:46:08,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:46:08,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:46:08,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:46:08,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:46:08,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:46:08,450 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:46:09,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:46:09,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:46:09,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:46:09,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:46:09,115 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:46:09,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-2-u.c [2021-01-06 10:46:09,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0264089be/fe2ff332964d4a1189398095a490ad7a/FLAG9982e0509 [2021-01-06 10:46:09,957 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:46:09,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-2-u.c [2021-01-06 10:46:09,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0264089be/fe2ff332964d4a1189398095a490ad7a/FLAG9982e0509 [2021-01-06 10:46:10,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0264089be/fe2ff332964d4a1189398095a490ad7a [2021-01-06 10:46:10,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:46:10,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:46:10,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:46:10,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:46:10,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:46:10,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf9d6c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10, skipping insertion in model container [2021-01-06 10:46:10,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:46:10,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:46:10,542 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/copy-2-u.c[320,333] 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[~B~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: 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,] [2021-01-06 10:46:10,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:46:10,632 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:46:10,664 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/copy-2-u.c[320,333] 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[~#B~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#B~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: 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,] [2021-01-06 10:46:10,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:46:10,752 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:46:10,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10 WrapperNode [2021-01-06 10:46:10,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:46:10,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:46:10,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:46:10,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:46:10,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:46:10,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:46:10,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:46:10,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:46:10,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (1/1) ... [2021-01-06 10:46:10,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:46:10,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:46:10,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:46:10,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:46:10,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (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 10:46:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:46:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:46:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:46:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:46:11,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:46:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:46:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:46:11,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:46:11,582 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 10:46:11,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:46:11 BoogieIcfgContainer [2021-01-06 10:46:11,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:46:11,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:46:11,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:46:11,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:46:11,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:46:10" (1/3) ... [2021-01-06 10:46:11,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60dc28cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:46:11, skipping insertion in model container [2021-01-06 10:46:11,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:10" (2/3) ... [2021-01-06 10:46:11,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60dc28cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:46:11, skipping insertion in model container [2021-01-06 10:46:11,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:46:11" (3/3) ... [2021-01-06 10:46:11,620 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-2-u.c [2021-01-06 10:46:11,642 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:46:11,653 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:46:11,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:46:11,735 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:46:11,735 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:46:11,736 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:46:11,736 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:46:11,736 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:46:11,736 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:46:11,737 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:46:11,737 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:46:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 10:46:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:46:11,792 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:11,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:11,796 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2021-01-06 10:46:11,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:11,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089414728] [2021-01-06 10:46:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:12,014 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:12,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268512101] [2021-01-06 10:46:12,017 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 10:46:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:12,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:46:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:12,276 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 10:46:12,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089414728] [2021-01-06 10:46:12,277 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:12,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268512101] [2021-01-06 10:46:12,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:12,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:46:12,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903605530] [2021-01-06 10:46:12,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:46:12,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:12,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:46:12,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:46:12,310 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2021-01-06 10:46:12,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:12,404 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2021-01-06 10:46:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:46:12,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 10:46:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:12,420 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:46:12,421 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 10:46:12,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:46:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 10:46:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-01-06 10:46:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:46:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-01-06 10:46:12,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2021-01-06 10:46:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:12,475 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-01-06 10:46:12,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:46:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-01-06 10:46:12,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:46:12,477 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:12,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:12,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:46:12,692 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:12,694 INFO L82 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2021-01-06 10:46:12,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:12,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001158182] [2021-01-06 10:46:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:12,707 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:12,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086554290] [2021-01-06 10:46:12,708 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 10:46:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:12,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:46:12,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:46:12,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001158182] [2021-01-06 10:46:12,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:12,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086554290] [2021-01-06 10:46:12,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:12,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:46:12,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81849841] [2021-01-06 10:46:12,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:46:12,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:12,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:46:12,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:46:12,817 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2021-01-06 10:46:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:12,916 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2021-01-06 10:46:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:46:12,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 10:46:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:12,918 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:46:12,918 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:46:12,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:46:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:46:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-01-06 10:46:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 10:46:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-01-06 10:46:12,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2021-01-06 10:46:12,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:12,929 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-01-06 10:46:12,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:46:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-01-06 10:46:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:46:12,930 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:12,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:13,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:13,145 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:13,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2021-01-06 10:46:13,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:13,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877959927] [2021-01-06 10:46:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:13,168 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:13,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538079341] [2021-01-06 10:46:13,170 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 10:46:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:13,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:46:13,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:46:13,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877959927] [2021-01-06 10:46:13,303 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:13,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538079341] [2021-01-06 10:46:13,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:13,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:46:13,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226188233] [2021-01-06 10:46:13,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:46:13,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:13,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:46:13,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:46:13,307 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2021-01-06 10:46:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:13,394 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-01-06 10:46:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:46:13,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 10:46:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:13,396 INFO L225 Difference]: With dead ends: 53 [2021-01-06 10:46:13,396 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:46:13,397 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 [2021-01-06 10:46:13,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:46:13,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2021-01-06 10:46:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:46:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-01-06 10:46:13,407 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-01-06 10:46:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:13,408 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-01-06 10:46:13,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:46:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-01-06 10:46:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:46:13,409 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:13,409 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:13,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:13,623 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:13,625 INFO L82 PathProgramCache]: Analyzing trace with hash -483699617, now seen corresponding path program 2 times [2021-01-06 10:46:13,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:13,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525211773] [2021-01-06 10:46:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:13,645 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:13,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186482727] [2021-01-06 10:46:13,648 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 [2021-01-06 10:46:13,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:46:13,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:13,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:46:13,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:46:13,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525211773] [2021-01-06 10:46:13,800 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:13,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186482727] [2021-01-06 10:46:13,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:13,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:46:13,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828667400] [2021-01-06 10:46:13,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:46:13,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:13,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:46:13,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:46:13,804 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2021-01-06 10:46:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:13,877 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-01-06 10:46:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:46:13,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-01-06 10:46:13,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:13,880 INFO L225 Difference]: With dead ends: 58 [2021-01-06 10:46:13,880 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 10:46:13,881 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 [2021-01-06 10:46:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 10:46:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2021-01-06 10:46:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:46:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-01-06 10:46:13,892 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2021-01-06 10:46:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:13,893 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-01-06 10:46:13,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:46:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-01-06 10:46:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:46:13,894 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:13,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:14,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:14,109 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1009156328, now seen corresponding path program 1 times [2021-01-06 10:46:14,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:14,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414258801] [2021-01-06 10:46:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:14,123 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:14,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769136350] [2021-01-06 10:46:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:14,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:46:14,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:46:14,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414258801] [2021-01-06 10:46:14,322 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:14,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769136350] [2021-01-06 10:46:14,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:14,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:46:14,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456637979] [2021-01-06 10:46:14,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:46:14,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:14,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:46:14,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:46:14,331 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 6 states. [2021-01-06 10:46:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:14,463 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2021-01-06 10:46:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:46:14,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2021-01-06 10:46:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:14,465 INFO L225 Difference]: With dead ends: 65 [2021-01-06 10:46:14,465 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:46:14,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:46:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:46:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-01-06 10:46:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:46:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-01-06 10:46:14,476 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2021-01-06 10:46:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:14,477 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-01-06 10:46:14,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:46:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-01-06 10:46:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:46:14,478 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:14,478 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:14,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:14,692 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash 923115154, now seen corresponding path program 2 times [2021-01-06 10:46:14,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:14,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206333834] [2021-01-06 10:46:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:14,707 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:14,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852582914] [2021-01-06 10:46:14,708 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 [2021-01-06 10:46:14,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:46:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:14,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:46:14,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:46:14,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206333834] [2021-01-06 10:46:14,872 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:14,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852582914] [2021-01-06 10:46:14,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:14,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:46:14,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173718559] [2021-01-06 10:46:14,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:46:14,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:14,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:46:14,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:46:14,875 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2021-01-06 10:46:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:14,985 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-01-06 10:46:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:46:14,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 10:46:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:14,989 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:46:14,989 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 10:46:14,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:46:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 10:46:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2021-01-06 10:46:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 10:46:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-01-06 10:46:15,000 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2021-01-06 10:46:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:15,000 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-01-06 10:46:15,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:46:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-01-06 10:46:15,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 10:46:15,001 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:15,002 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:15,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:15,217 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:15,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:15,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1541106392, now seen corresponding path program 3 times [2021-01-06 10:46:15,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:15,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925868362] [2021-01-06 10:46:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:15,232 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:15,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63213609] [2021-01-06 10:46:15,233 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 [2021-01-06 10:46:15,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:46:15,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:15,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:46:15,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 10:46:15,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925868362] [2021-01-06 10:46:15,441 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:15,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63213609] [2021-01-06 10:46:15,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:15,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:46:15,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463592186] [2021-01-06 10:46:15,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:46:15,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:15,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:46:15,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:46:15,446 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2021-01-06 10:46:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:15,587 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2021-01-06 10:46:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:46:15,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2021-01-06 10:46:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:15,595 INFO L225 Difference]: With dead ends: 124 [2021-01-06 10:46:15,595 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 10:46:15,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:46:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 10:46:15,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 51. [2021-01-06 10:46:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 10:46:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-01-06 10:46:15,636 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2021-01-06 10:46:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:15,637 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-01-06 10:46:15,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:46:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-01-06 10:46:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 10:46:15,641 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:15,641 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:15,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:15,856 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:15,856 INFO L82 PathProgramCache]: Analyzing trace with hash -57445772, now seen corresponding path program 4 times [2021-01-06 10:46:15,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:15,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961155664] [2021-01-06 10:46:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:15,885 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:15,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601538367] [2021-01-06 10:46:15,888 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 [2021-01-06 10:46:15,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:46:15,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:15,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:46:15,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-01-06 10:46:16,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961155664] [2021-01-06 10:46:16,148 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:16,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601538367] [2021-01-06 10:46:16,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:16,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:46:16,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526776057] [2021-01-06 10:46:16,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:46:16,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:46:16,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:46:16,151 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 10 states. [2021-01-06 10:46:16,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:16,425 INFO L93 Difference]: Finished difference Result 168 states and 200 transitions. [2021-01-06 10:46:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:46:16,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2021-01-06 10:46:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:16,428 INFO L225 Difference]: With dead ends: 168 [2021-01-06 10:46:16,428 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 10:46:16,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:46:16,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 10:46:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 65. [2021-01-06 10:46:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:46:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-01-06 10:46:16,444 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 38 [2021-01-06 10:46:16,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:16,445 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-01-06 10:46:16,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:46:16,445 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-01-06 10:46:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 10:46:16,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:16,447 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:16,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:46:16,661 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:16,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:16,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1931323112, now seen corresponding path program 5 times [2021-01-06 10:46:16,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:16,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574813411] [2021-01-06 10:46:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:16,675 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:16,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829219687] [2021-01-06 10:46:16,676 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 [2021-01-06 10:46:29,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 10:46:29,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:29,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:46:29,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 81 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-01-06 10:46:30,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574813411] [2021-01-06 10:46:30,023 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:30,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829219687] [2021-01-06 10:46:30,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:30,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:46:30,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892988652] [2021-01-06 10:46:30,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:46:30,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:30,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:46:30,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:46:30,028 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 8 states. [2021-01-06 10:46:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:30,139 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2021-01-06 10:46:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:46:30,139 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2021-01-06 10:46:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:30,141 INFO L225 Difference]: With dead ends: 144 [2021-01-06 10:46:30,141 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 10:46:30,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:46:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 10:46:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2021-01-06 10:46:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:46:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2021-01-06 10:46:30,157 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 52 [2021-01-06 10:46:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:30,158 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2021-01-06 10:46:30,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:46:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2021-01-06 10:46:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:46:30,160 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:30,160 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:30,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:30,374 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:30,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2035130766, now seen corresponding path program 6 times [2021-01-06 10:46:30,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:30,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608560637] [2021-01-06 10:46:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:30,396 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:30,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049343746] [2021-01-06 10:46:30,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:31,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 10:46:31,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:46:31,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-01-06 10:46:31,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608560637] [2021-01-06 10:46:31,732 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:31,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049343746] [2021-01-06 10:46:31,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:31,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:46:31,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558201815] [2021-01-06 10:46:31,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:46:31,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:31,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:46:31,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:46:31,739 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 9 states. [2021-01-06 10:46:31,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:31,886 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2021-01-06 10:46:31,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:46:31,887 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-01-06 10:46:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:31,888 INFO L225 Difference]: With dead ends: 163 [2021-01-06 10:46:31,888 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:46:31,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:46:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:46:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2021-01-06 10:46:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:46:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2021-01-06 10:46:31,927 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 58 [2021-01-06 10:46:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:31,928 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2021-01-06 10:46:31,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:46:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2021-01-06 10:46:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 10:46:31,933 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:31,936 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:32,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:32,151 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash 301106088, now seen corresponding path program 7 times [2021-01-06 10:46:32,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:32,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595321312] [2021-01-06 10:46:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:32,177 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:32,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107682842] [2021-01-06 10:46:32,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:32,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:46:32,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-01-06 10:46:32,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595321312] [2021-01-06 10:46:32,559 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:32,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107682842] [2021-01-06 10:46:32,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:32,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:46:32,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075680795] [2021-01-06 10:46:32,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:46:32,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:32,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:46:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:46:32,562 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 10 states. [2021-01-06 10:46:32,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:32,704 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2021-01-06 10:46:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:46:32,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2021-01-06 10:46:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:32,706 INFO L225 Difference]: With dead ends: 182 [2021-01-06 10:46:32,706 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 10:46:32,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:46:32,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 10:46:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2021-01-06 10:46:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:46:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2021-01-06 10:46:32,733 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 64 [2021-01-06 10:46:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:32,733 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2021-01-06 10:46:32,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:46:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2021-01-06 10:46:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 10:46:32,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:32,740 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:32,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:46:32,944 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:32,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1977547214, now seen corresponding path program 8 times [2021-01-06 10:46:32,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:32,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284469172] [2021-01-06 10:46:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:32,955 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:32,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260827019] [2021-01-06 10:46:32,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:33,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:46:33,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:33,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:46:33,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-01-06 10:46:33,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284469172] [2021-01-06 10:46:33,282 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:33,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260827019] [2021-01-06 10:46:33,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:33,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:46:33,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794278015] [2021-01-06 10:46:33,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:46:33,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:33,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:46:33,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:46:33,286 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 11 states. [2021-01-06 10:46:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:33,434 INFO L93 Difference]: Finished difference Result 201 states and 231 transitions. [2021-01-06 10:46:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:46:33,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2021-01-06 10:46:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:33,437 INFO L225 Difference]: With dead ends: 201 [2021-01-06 10:46:33,437 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 10:46:33,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:46:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 10:46:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2021-01-06 10:46:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 10:46:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2021-01-06 10:46:33,453 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 70 [2021-01-06 10:46:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:33,453 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2021-01-06 10:46:33,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:46:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2021-01-06 10:46:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:46:33,457 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:33,457 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:33,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:33,672 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:33,673 INFO L82 PathProgramCache]: Analyzing trace with hash -630230936, now seen corresponding path program 9 times [2021-01-06 10:46:33,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:33,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938785144] [2021-01-06 10:46:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:33,685 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:33,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674164255] [2021-01-06 10:46:33,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:51,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 10:46:51,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:51,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:46:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 167 proven. 36 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2021-01-06 10:46:51,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938785144] [2021-01-06 10:46:51,450 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:51,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674164255] [2021-01-06 10:46:51,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:51,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:46:51,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710749224] [2021-01-06 10:46:51,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:46:51,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:51,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:46:51,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:46:51,454 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 12 states. [2021-01-06 10:46:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:51,632 INFO L93 Difference]: Finished difference Result 220 states and 251 transitions. [2021-01-06 10:46:51,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:46:51,633 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2021-01-06 10:46:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:51,634 INFO L225 Difference]: With dead ends: 220 [2021-01-06 10:46:51,634 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 10:46:51,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:46:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 10:46:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2021-01-06 10:46:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 10:46:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2021-01-06 10:46:51,661 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 76 [2021-01-06 10:46:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:51,661 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2021-01-06 10:46:51,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:46:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2021-01-06 10:46:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 10:46:51,662 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:51,663 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:51,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:46:51,864 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:51,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1972059634, now seen corresponding path program 10 times [2021-01-06 10:46:51,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:51,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184542803] [2021-01-06 10:46:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:51,877 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:51,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807346516] [2021-01-06 10:46:51,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:51,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:46:51,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:51,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:46:51,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 36 proven. 318 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-01-06 10:46:52,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184542803] [2021-01-06 10:46:52,320 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:52,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807346516] [2021-01-06 10:46:52,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:52,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:46:52,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148068723] [2021-01-06 10:46:52,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:46:52,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:52,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:46:52,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:46:52,326 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand 16 states. [2021-01-06 10:46:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:52,814 INFO L93 Difference]: Finished difference Result 371 states and 435 transitions. [2021-01-06 10:46:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:46:52,814 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2021-01-06 10:46:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:52,816 INFO L225 Difference]: With dead ends: 371 [2021-01-06 10:46:52,816 INFO L226 Difference]: Without dead ends: 300 [2021-01-06 10:46:52,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:46:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-01-06 10:46:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 134. [2021-01-06 10:46:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 10:46:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2021-01-06 10:46:52,838 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 82 [2021-01-06 10:46:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:52,838 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2021-01-06 10:46:52,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:46:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2021-01-06 10:46:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:46:52,840 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:52,840 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:53,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:53,054 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:53,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1215801900, now seen corresponding path program 11 times [2021-01-06 10:46:53,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:53,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716526750] [2021-01-06 10:46:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:53,068 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:53,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773828149] [2021-01-06 10:46:53,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true