/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/add-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:45:48,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:45:48,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:45:48,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:45:48,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:45:48,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:45:48,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:45:48,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:45:48,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:45:48,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:45:48,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:45:48,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:45:48,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:45:48,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:45:48,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:45:48,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:45:48,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:45:48,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:45:48,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:45:48,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:45:48,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:45:48,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:45:48,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:45:48,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:45:48,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 10:45:48,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 10:45:48,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 10:45:48,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 10:45:48,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 10:45:48,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 10:45:48,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:45:48,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:45:48,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:45:48,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:45:48,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:45:48,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:45:48,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:45:48,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:45:48,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:45:48,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:45:48,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:45:48,521 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 10:45:48,580 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:45:48,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:45:48,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:45:48,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:45:48,588 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:45:48,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:45:48,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:45:48,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:45:48,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:45:48,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:45:48,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:45:48,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:45:48,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:45:48,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:45:48,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:45:48,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:45:48,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:45:48,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:45:48,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:45:48,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:45:48,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:45:48,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:45:48,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:45:48,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:45:48,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:45:48,595 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:45:49,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:45:49,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:45:49,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:45:49,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:45:49,238 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:45:49,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2021-01-06 10:45:49,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b509e0258/1574c7f53afc4947a71c12e62a628cf6/FLAGf0862fe9f [2021-01-06 10:45:50,309 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:45:50,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2021-01-06 10:45:50,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b509e0258/1574c7f53afc4947a71c12e62a628cf6/FLAGf0862fe9f [2021-01-06 10:45:50,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b509e0258/1574c7f53afc4947a71c12e62a628cf6 [2021-01-06 10:45:50,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:45:50,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:45:50,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:45:50,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:45:50,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:45:50,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:50,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@247a5e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50, skipping insertion in model container [2021-01-06 10:45:50,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:50,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:45:50,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:45:50,867 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/add-2-n-u.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~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: 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[~C~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 10:45:50,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:45:50,916 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:45:50,933 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/add-2-n-u.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~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: 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[~#C~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#C~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 10:45:50,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:45:50,975 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:45:50,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50 WrapperNode [2021-01-06 10:45:50,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:45:50,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:45:50,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:45:50,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:45:50,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:51,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:51,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:45:51,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:45:51,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:45:51,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:45:51,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:51,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:51,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:51,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:51,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:51,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:51,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (1/1) ... [2021-01-06 10:45:51,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:45:51,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:45:51,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:45:51,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:45:51,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (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 10:45:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:45:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:45:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:45:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:45:51,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:45:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:45:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:45:51,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:45:51,612 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 10:45:51,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:45:51 BoogieIcfgContainer [2021-01-06 10:45:51,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:45:51,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:45:51,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:45:51,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:45:51,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:45:50" (1/3) ... [2021-01-06 10:45:51,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf2ea26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:45:51, skipping insertion in model container [2021-01-06 10:45:51,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:45:50" (2/3) ... [2021-01-06 10:45:51,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf2ea26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:45:51, skipping insertion in model container [2021-01-06 10:45:51,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:45:51" (3/3) ... [2021-01-06 10:45:51,677 INFO L111 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2021-01-06 10:45:51,696 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:45:51,728 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:45:51,767 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:45:51,836 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:45:51,839 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:45:51,839 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:45:51,839 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:45:51,840 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:45:51,840 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:45:51,840 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:45:51,840 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:45:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 10:45:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:45:51,879 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:51,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:45:51,881 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:51,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2021-01-06 10:45:51,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:51,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278787915] [2021-01-06 10:45:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:52,109 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:45:52,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614272981] [2021-01-06 10:45:52,111 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 10:45:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:45:52,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:45:52,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:52,533 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 10:45:52,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278787915] [2021-01-06 10:45:52,536 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:45:52,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614272981] [2021-01-06 10:45:52,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:45:52,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:45:52,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162486059] [2021-01-06 10:45:52,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:45:52,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:52,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:45:52,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:45:52,578 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2021-01-06 10:45:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:52,702 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2021-01-06 10:45:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:45:52,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 10:45:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:52,718 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:45:52,718 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 10:45:52,724 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 10:45:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 10:45:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-01-06 10:45:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:45:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-01-06 10:45:52,774 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2021-01-06 10:45:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:52,776 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-01-06 10:45:52,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:45:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-01-06 10:45:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:45:52,778 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:52,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:45:52,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:45:52,995 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2021-01-06 10:45:52,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:52,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62945903] [2021-01-06 10:45:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:53,012 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:45:53,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427712863] [2021-01-06 10:45:53,014 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 10:45:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:45:53,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:45:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:53,179 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 10:45:53,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62945903] [2021-01-06 10:45:53,180 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:45:53,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427712863] [2021-01-06 10:45:53,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:45:53,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:45:53,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963227710] [2021-01-06 10:45:53,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:45:53,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:53,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:45:53,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:45:53,191 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2021-01-06 10:45:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:53,306 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2021-01-06 10:45:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:45:53,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 10:45:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:53,310 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:45:53,311 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:45:53,312 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 10:45:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:45:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-01-06 10:45:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 10:45:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-01-06 10:45:53,334 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2021-01-06 10:45:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:53,335 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-01-06 10:45:53,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:45:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-01-06 10:45:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:45:53,337 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:53,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:45:53,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:53,553 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:53,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:53,555 INFO L82 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2021-01-06 10:45:53,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:53,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083585828] [2021-01-06 10:45:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:53,584 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:45:53,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146505589] [2021-01-06 10:45:53,586 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 10:45:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:45:53,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:45:53,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:53,735 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 10:45:53,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083585828] [2021-01-06 10:45:53,737 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:45:53,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146505589] [2021-01-06 10:45:53,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:45:53,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:45:53,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598094650] [2021-01-06 10:45:53,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:45:53,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:53,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:45:53,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:45:53,741 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2021-01-06 10:45:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:53,820 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-01-06 10:45:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:45:53,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 10:45:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:53,822 INFO L225 Difference]: With dead ends: 53 [2021-01-06 10:45:53,822 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:45:53,823 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 10:45:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:45:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2021-01-06 10:45:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:45:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-01-06 10:45:53,831 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-01-06 10:45:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:53,832 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-01-06 10:45:53,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:45:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-01-06 10:45:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:45:53,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:53,833 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:45:54,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:54,050 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash -483699617, now seen corresponding path program 2 times [2021-01-06 10:45:54,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:54,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630190444] [2021-01-06 10:45:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:54,086 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:45:54,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897454569] [2021-01-06 10:45:54,090 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 10:45:54,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:45:54,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:45:54,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:45:54,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:54,226 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 10:45:54,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630190444] [2021-01-06 10:45:54,229 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:45:54,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897454569] [2021-01-06 10:45:54,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:45:54,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:45:54,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382566167] [2021-01-06 10:45:54,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:45:54,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:54,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:45:54,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:45:54,233 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2021-01-06 10:45:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:54,296 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-01-06 10:45:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:45:54,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-01-06 10:45:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:54,300 INFO L225 Difference]: With dead ends: 58 [2021-01-06 10:45:54,300 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 10:45:54,301 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 10:45:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 10:45:54,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2021-01-06 10:45:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:45:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-01-06 10:45:54,311 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2021-01-06 10:45:54,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:54,311 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-01-06 10:45:54,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:45:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-01-06 10:45:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:45:54,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:54,313 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 10:45:54,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:54,528 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1009156328, now seen corresponding path program 1 times [2021-01-06 10:45:54,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:54,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283841195] [2021-01-06 10:45:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:54,540 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:45:54,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654511227] [2021-01-06 10:45:54,541 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 10:45:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:45:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:45:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:54,713 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 10:45:54,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283841195] [2021-01-06 10:45:54,714 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:45:54,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654511227] [2021-01-06 10:45:54,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:45:54,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:45:54,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073111133] [2021-01-06 10:45:54,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:45:54,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:54,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:45:54,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:45:54,718 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 6 states. [2021-01-06 10:45:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:54,813 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2021-01-06 10:45:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:45:54,813 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2021-01-06 10:45:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:54,816 INFO L225 Difference]: With dead ends: 65 [2021-01-06 10:45:54,816 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:45:54,817 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 10:45:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:45:54,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-01-06 10:45:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:45:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-01-06 10:45:54,838 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2021-01-06 10:45:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:54,842 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-01-06 10:45:54,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:45:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-01-06 10:45:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:45:54,844 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:54,845 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 10:45:55,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:55,059 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash 923115154, now seen corresponding path program 2 times [2021-01-06 10:45:55,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:55,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948227912] [2021-01-06 10:45:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:55,074 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:45:55,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800838021] [2021-01-06 10:45:55,075 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 10:45:55,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:45:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:45:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:45:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:55,237 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 10:45:55,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948227912] [2021-01-06 10:45:55,238 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:45:55,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800838021] [2021-01-06 10:45:55,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:45:55,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:45:55,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608861675] [2021-01-06 10:45:55,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:45:55,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:55,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:45:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:45:55,242 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2021-01-06 10:45:55,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:55,352 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-01-06 10:45:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:45:55,353 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 10:45:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:55,354 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:45:55,355 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 10:45:55,356 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 10:45:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 10:45:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2021-01-06 10:45:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 10:45:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-01-06 10:45:55,366 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2021-01-06 10:45:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:55,367 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-01-06 10:45:55,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:45:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-01-06 10:45:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 10:45:55,368 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:55,368 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 10:45:55,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:55,585 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:55,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1541106392, now seen corresponding path program 3 times [2021-01-06 10:45:55,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:55,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502351637] [2021-01-06 10:45:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:55,600 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:45:55,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868336793] [2021-01-06 10:45:55,601 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 10:45:55,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:45:55,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:45:55,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:45:55,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:55,747 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 10:45:55,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502351637] [2021-01-06 10:45:55,749 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:45:55,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868336793] [2021-01-06 10:45:55,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:45:55,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:45:55,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040284042] [2021-01-06 10:45:55,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:45:55,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:55,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:45:55,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:45:55,752 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2021-01-06 10:45:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:55,849 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2021-01-06 10:45:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:45:55,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2021-01-06 10:45:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:55,854 INFO L225 Difference]: With dead ends: 124 [2021-01-06 10:45:55,855 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 10:45:55,856 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 10:45:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 10:45:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 51. [2021-01-06 10:45:55,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 10:45:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-01-06 10:45:55,874 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2021-01-06 10:45:55,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:55,874 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-01-06 10:45:55,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:45:55,874 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-01-06 10:45:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 10:45:55,878 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:55,878 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 10:45:56,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:56,080 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:56,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:56,080 INFO L82 PathProgramCache]: Analyzing trace with hash -57445772, now seen corresponding path program 4 times [2021-01-06 10:45:56,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:56,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492198440] [2021-01-06 10:45:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:56,137 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:45:56,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385675033] [2021-01-06 10:45:56,140 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 10:45:57,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:45:57,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:45:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:45:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:45:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-01-06 10:45:57,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492198440] [2021-01-06 10:45:57,644 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:45:57,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385675033] [2021-01-06 10:45:57,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:45:57,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:45:57,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964546038] [2021-01-06 10:45:57,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:45:57,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:45:57,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:45:57,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:45:57,647 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2021-01-06 10:45:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:45:57,785 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2021-01-06 10:45:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:45:57,786 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2021-01-06 10:45:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:45:57,787 INFO L225 Difference]: With dead ends: 114 [2021-01-06 10:45:57,787 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:45:57,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 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 10:45:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:45:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2021-01-06 10:45:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 10:45:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-01-06 10:45:57,801 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 38 [2021-01-06 10:45:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:45:57,802 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-01-06 10:45:57,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:45:57,802 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-01-06 10:45:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:45:57,803 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:45:57,803 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:45:58,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:45:58,019 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:45:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:45:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1601697520, now seen corresponding path program 5 times [2021-01-06 10:45:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:45:58,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255572803] [2021-01-06 10:45:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:45:58,045 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:45:58,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603860619] [2021-01-06 10:45:58,046 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