/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-tiling/nr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:20:01,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:20:01,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:20:01,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:20:01,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:20:01,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:20:01,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:20:01,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:20:01,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:20:01,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:20:01,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:20:01,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:20:01,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:20:01,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:20:01,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:20:01,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:20:01,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:20:01,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:20:01,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:20:01,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:20:01,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:20:01,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:20:01,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:20:01,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:20:01,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 10:20:01,559 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 10:20:01,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 10:20:01,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 10:20:01,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 10:20:01,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 10:20:01,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:20:01,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:20:01,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:20:01,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:20:01,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:20:01,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:20:01,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:20:01,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:20:01,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:20:01,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:20:01,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:20:01,576 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 10:20:01,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:20:01,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:20:01,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:20:01,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:20:01,634 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:20:01,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:20:01,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:20:01,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:20:01,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:20:01,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:20:01,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:20:01,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:20:01,637 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:20:01,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:20:01,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:20:01,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:20:01,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:20:01,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:20:01,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:20:01,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:20:01,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:20:01,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:20:01,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:20:01,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:20:01,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:20:01,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:20:02,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:20:02,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:20:02,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:20:02,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:20:02,153 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:20:02,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/nr2.c [2021-01-06 10:20:02,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/03ace9cff/ecdc3b2770a344488799002a6de1b612/FLAGdb4036a95 [2021-01-06 10:20:02,996 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:20:02,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/nr2.c [2021-01-06 10:20:03,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/03ace9cff/ecdc3b2770a344488799002a6de1b612/FLAGdb4036a95 [2021-01-06 10:20:03,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/03ace9cff/ecdc3b2770a344488799002a6de1b612 [2021-01-06 10:20:03,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:20:03,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:20:03,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:20:03,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:20:03,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:20:03,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3add5cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03, skipping insertion in model container [2021-01-06 10:20:03,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:20:03,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:20:03,551 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-tiling/nr2.c[394,407] left hand side expression in assignment: lhs: VariableLHS[~CELLCOUNT~0,GLOBAL] 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: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IdentifierExpression[~j~0,]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IdentifierExpression[~j~0,]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:20:03,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:20:03,586 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:20:03,601 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-tiling/nr2.c[394,407] left hand side expression in assignment: lhs: VariableLHS[~CELLCOUNT~0,GLOBAL] 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: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IdentifierExpression[~j~0,]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~0,]],IdentifierExpression[~j~0,]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:20:03,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:20:03,630 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:20:03,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03 WrapperNode [2021-01-06 10:20:03,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:20:03,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:20:03,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:20:03,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:20:03,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:20:03,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:20:03,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:20:03,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:20:03,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (1/1) ... [2021-01-06 10:20:03,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:20:03,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:20:03,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:20:03,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:20:03,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (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 10:20:03,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:20:03,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:20:03,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:20:03,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:20:03,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:20:03,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:20:03,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:20:04,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:20:04,159 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 10:20:04,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:20:04 BoogieIcfgContainer [2021-01-06 10:20:04,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:20:04,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:20:04,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:20:04,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:20:04,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:20:03" (1/3) ... [2021-01-06 10:20:04,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a108c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:20:04, skipping insertion in model container [2021-01-06 10:20:04,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:20:03" (2/3) ... [2021-01-06 10:20:04,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a108c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:20:04, skipping insertion in model container [2021-01-06 10:20:04,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:20:04" (3/3) ... [2021-01-06 10:20:04,172 INFO L111 eAbstractionObserver]: Analyzing ICFG nr2.c [2021-01-06 10:20:04,180 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:20:04,186 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:20:04,208 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:20:04,240 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:20:04,240 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:20:04,241 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:20:04,241 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:20:04,241 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:20:04,241 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:20:04,241 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:20:04,241 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:20:04,263 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2021-01-06 10:20:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:20:04,272 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:04,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:04,274 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash -405965127, now seen corresponding path program 1 times [2021-01-06 10:20:04,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:04,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737202273] [2021-01-06 10:20:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:04,549 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 10:20:04,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737202273] [2021-01-06 10:20:04,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:20:04,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:20:04,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233816549] [2021-01-06 10:20:04,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:20:04,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:20:04,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:20:04,579 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2021-01-06 10:20:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:04,601 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-01-06 10:20:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:20:04,603 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2021-01-06 10:20:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:04,615 INFO L225 Difference]: With dead ends: 45 [2021-01-06 10:20:04,616 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 10:20:04,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:20:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 10:20:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 10:20:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:20:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-01-06 10:20:04,664 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-01-06 10:20:04,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:04,665 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-01-06 10:20:04,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:20:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-01-06 10:20:04,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:20:04,666 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:04,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:04,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:20:04,667 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:04,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:04,668 INFO L82 PathProgramCache]: Analyzing trace with hash 274093243, now seen corresponding path program 1 times [2021-01-06 10:20:04,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:04,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831448708] [2021-01-06 10:20:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:04,860 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 10:20:04,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831448708] [2021-01-06 10:20:04,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:20:04,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:20:04,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815754231] [2021-01-06 10:20:04,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:20:04,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:04,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:20:04,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:20:04,865 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2021-01-06 10:20:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:04,910 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-01-06 10:20:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:20:04,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 10:20:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:04,912 INFO L225 Difference]: With dead ends: 29 [2021-01-06 10:20:04,912 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:20:04,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:20:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:20:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-01-06 10:20:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 10:20:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-01-06 10:20:04,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-01-06 10:20:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:04,920 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-01-06 10:20:04,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:20:04,920 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-01-06 10:20:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:20:04,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:04,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:04,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:20:04,922 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:04,923 INFO L82 PathProgramCache]: Analyzing trace with hash 274152825, now seen corresponding path program 1 times [2021-01-06 10:20:04,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:04,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738093897] [2021-01-06 10:20:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:05,170 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 10:20:05,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738093897] [2021-01-06 10:20:05,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:20:05,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:20:05,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908996229] [2021-01-06 10:20:05,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:20:05,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:05,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:20:05,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:20:05,174 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2021-01-06 10:20:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:05,224 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-01-06 10:20:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:20:05,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 10:20:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:05,226 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:20:05,226 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:20:05,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 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 10:20:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:20:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-01-06 10:20:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:20:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-01-06 10:20:05,233 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-01-06 10:20:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:05,233 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-01-06 10:20:05,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:20:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-01-06 10:20:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:20:05,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:05,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:05,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 10:20:05,235 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:05,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash -715167033, now seen corresponding path program 1 times [2021-01-06 10:20:05,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:05,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512394189] [2021-01-06 10:20:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:05,284 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 10:20:05,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512394189] [2021-01-06 10:20:05,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:20:05,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:20:05,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557573262] [2021-01-06 10:20:05,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:20:05,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:05,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:20:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:20:05,292 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 3 states. [2021-01-06 10:20:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:05,330 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-01-06 10:20:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:20:05,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-01-06 10:20:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:05,334 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:20:05,334 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:20:05,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:20:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:20:05,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-01-06 10:20:05,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:20:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:20:05,347 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-01-06 10:20:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:05,349 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:20:05,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:20:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:20:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:20:05,352 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:05,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:05,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 10:20:05,353 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1618667584, now seen corresponding path program 1 times [2021-01-06 10:20:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:05,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101545323] [2021-01-06 10:20:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:05,472 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 10:20:05,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101545323] [2021-01-06 10:20:05,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899615242] [2021-01-06 10:20:05,476 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 10:20:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:05,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:20:05,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:05,620 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 10:20:05,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:05,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:20:05,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695351601] [2021-01-06 10:20:05,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:20:05,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:05,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:20:05,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:20:05,623 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2021-01-06 10:20:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:05,654 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-01-06 10:20:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:20:05,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2021-01-06 10:20:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:05,655 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:20:05,655 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:20:05,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 10:20:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:20:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 10:20:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:20:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-01-06 10:20:05,662 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2021-01-06 10:20:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:05,663 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-01-06 10:20:05,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:20:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-01-06 10:20:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:20:05,664 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:05,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:05,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:05,879 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1955154983, now seen corresponding path program 2 times [2021-01-06 10:20:05,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:05,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970454246] [2021-01-06 10:20:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:05,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970454246] [2021-01-06 10:20:05,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094167811] [2021-01-06 10:20:05,956 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 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 10:20:06,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:20:06,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:20:06,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:20:06,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:06,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:20:06,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-01-06 10:20:06,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912221543] [2021-01-06 10:20:06,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:20:06,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:06,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:20:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:20:06,099 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2021-01-06 10:20:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:06,133 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2021-01-06 10:20:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:20:06,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-06 10:20:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:06,135 INFO L225 Difference]: With dead ends: 47 [2021-01-06 10:20:06,135 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:20:06,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:20:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:20:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 10:20:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:20:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-01-06 10:20:06,142 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 22 [2021-01-06 10:20:06,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:06,143 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-01-06 10:20:06,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:20:06,143 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-01-06 10:20:06,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:20:06,144 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:06,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:06,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:06,359 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:06,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1638747735, now seen corresponding path program 1 times [2021-01-06 10:20:06,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:06,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450093027] [2021-01-06 10:20:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:06,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450093027] [2021-01-06 10:20:06,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224307122] [2021-01-06 10:20:06,688 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 10:20:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:06,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 10:20:06,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:06,848 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:20:06,849 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:06,857 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:06,859 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:20:06,859 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 10:20:06,920 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:06,921 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 103 [2021-01-06 10:20:06,925 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:06,951 INFO L625 ElimStorePlain]: treesize reduction 28, result has 62.7 percent of original size [2021-01-06 10:20:06,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:06,957 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:20:06,958 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:47 [2021-01-06 10:20:06,960 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:07,000 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:07,037 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:07,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:07,113 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:07,151 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:07,223 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2021-01-06 10:20:07,224 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:07,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:07,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-01-06 10:20:07,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917618429] [2021-01-06 10:20:07,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:20:07,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:07,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:20:07,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:20:07,407 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 17 states. [2021-01-06 10:20:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:09,442 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2021-01-06 10:20:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 10:20:09,442 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2021-01-06 10:20:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:09,446 INFO L225 Difference]: With dead ends: 144 [2021-01-06 10:20:09,446 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 10:20:09,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=434, Invalid=1822, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:20:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 10:20:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 51. [2021-01-06 10:20:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 10:20:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-01-06 10:20:09,462 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 22 [2021-01-06 10:20:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:09,462 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-01-06 10:20:09,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:20:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-01-06 10:20:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:20:09,464 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:09,464 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:09,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:09,678 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -565805188, now seen corresponding path program 1 times [2021-01-06 10:20:09,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:09,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863078079] [2021-01-06 10:20:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:10,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863078079] [2021-01-06 10:20:10,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195079036] [2021-01-06 10:20:10,014 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 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 10:20:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:10,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:20:10,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:10,170 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:20:10,171 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:10,178 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:10,180 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:20:10,180 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2021-01-06 10:20:10,450 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:10,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:10,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:20:10,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-06 10:20:10,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968621670] [2021-01-06 10:20:10,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:20:10,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:20:10,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:20:10,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:20:10,493 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 23 states. [2021-01-06 10:20:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:20:11,346 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2021-01-06 10:20:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:20:11,347 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2021-01-06 10:20:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:20:11,348 INFO L225 Difference]: With dead ends: 100 [2021-01-06 10:20:11,348 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:20:11,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:20:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:20:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2021-01-06 10:20:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 10:20:11,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-01-06 10:20:11,363 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 28 [2021-01-06 10:20:11,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:20:11,363 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-01-06 10:20:11,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:20:11,364 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-01-06 10:20:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:20:11,365 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:20:11,365 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:20:11,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:20:11,581 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:20:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:20:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1346440327, now seen corresponding path program 2 times [2021-01-06 10:20:11,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:20:11,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042439078] [2021-01-06 10:20:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:20:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:20:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:20:12,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042439078] [2021-01-06 10:20:12,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511654157] [2021-01-06 10:20:12,124 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 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 10:20:12,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:20:12,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:20:12,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:20:12,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:20:12,246 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:12,301 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-01-06 10:20:12,302 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:12,310 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:12,311 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:20:12,311 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 10:20:12,364 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:12,365 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 75 [2021-01-06 10:20:12,370 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:12,400 INFO L625 ElimStorePlain]: treesize reduction 19, result has 70.8 percent of original size [2021-01-06 10:20:12,402 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:12,405 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:20:12,405 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:46 [2021-01-06 10:20:12,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:12,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:12,509 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:12,565 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:12,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:12,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:20:12,858 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:12,858 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 146 [2021-01-06 10:20:12,863 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:12,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:20:12,875 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2021-01-06 10:20:12,877 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:12,987 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-01-06 10:20:12,989 INFO L625 ElimStorePlain]: treesize reduction 45, result has 75.3 percent of original size [2021-01-06 10:20:12,995 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-01-06 10:20:12,996 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:125, output treesize:99 [2021-01-06 10:20:13,124 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:20:13,193 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:13,194 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 159 [2021-01-06 10:20:13,201 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:13,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:20:13,253 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:20:13,253 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 159 [2021-01-06 10:20:13,259 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:20:13,427 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-01-06 10:20:13,430 INFO L625 ElimStorePlain]: treesize reduction 134, result has 54.6 percent of original size [2021-01-06 10:20:13,446 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,450 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:13,460 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,470 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:13,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:20:13,480 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:13,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:20:13,508 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,513 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:13,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,526 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,539 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,540 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,546 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:13,560 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-01-06 10:20:13,561 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:135, output treesize:161 [2021-01-06 10:20:13,565 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,568 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:13,579 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,582 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,586 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:13,588 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,590 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,592 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:13,596 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:20:13,598 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,601 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:13,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:13,605 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:20:13,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,614 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:13,616 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:30,318 WARN L197 SmtUtils]: Spent 12.06 s on a formula simplification that was a NOOP. DAG size: 71 [2021-01-06 10:20:30,332 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:30,333 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:30,335 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:30,337 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:30,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:30,339 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:30,341 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:30,345 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:30,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:30,351 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:20:30,354 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:30,369 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:30,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:30,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:30,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:30,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:20:30,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:20:30,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:30,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:30,409 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:20:30,410 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:20:30,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:21:43,023 WARN L197 SmtUtils]: Spent 1.05 m on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-01-06 10:22:28,420 WARN L197 SmtUtils]: Spent 31.32 s on a formula simplification that was a NOOP. DAG size: 75 [2021-01-06 10:23:06,755 WARN L197 SmtUtils]: Spent 34.02 s on a formula simplification that was a NOOP. DAG size: 77 [2021-01-06 10:23:06,773 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 4, 5, 1] term [2021-01-06 10:23:06,773 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2021-01-06 10:24:15,289 WARN L197 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-01-06 10:24:15,300 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2021-01-06 10:24:15,301 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:24:15,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:24:15,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:24:15,318 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:24:15,319 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:24:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:24:15,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:24:15,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2021-01-06 10:24:15,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916141993] [2021-01-06 10:24:15,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:24:15,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:24:15,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:24:15,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=786, Unknown=11, NotChecked=0, Total=930 [2021-01-06 10:24:15,376 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 31 states.