/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/reducercommutativity/max.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:11:19,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:11:19,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:11:19,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:11:19,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:11:19,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:11:19,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:11:19,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:11:19,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:11:19,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:11:19,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:11:19,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:11:19,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:11:19,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:11:19,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:11:19,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:11:19,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:11:19,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:11:19,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:11:19,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:11:19,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:11:19,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:11:19,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:11:19,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:11:19,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:11:19,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:11:19,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:11:19,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:11:19,709 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 10:11:19,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:11:19,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:11:19,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:11:19,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:11:19,738 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:11:19,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:11:19,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:11:19,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:11:19,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:11:19,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:11:19,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:11:19,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:11:19,740 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:11:19,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:11:19,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:11:19,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:11:19,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:11:19,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:11:19,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:11:19,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:11:19,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:11:19,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:11:19,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:11:19,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:11:19,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:11:19,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:11:20,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:11:20,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:11:20,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:11:20,161 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:11:20,162 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:11:20,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max.i [2021-01-06 10:11:20,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1e274838f/962e705b02a5448abea9ab1bb95e8809/FLAG85d6a67ed [2021-01-06 10:11:20,909 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:11:20,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max.i [2021-01-06 10:11:20,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1e274838f/962e705b02a5448abea9ab1bb95e8809/FLAG85d6a67ed [2021-01-06 10:11:21,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1e274838f/962e705b02a5448abea9ab1bb95e8809 [2021-01-06 10:11:21,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:11:21,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:11:21,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:11:21,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:11:21,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:11:21,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5230547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21, skipping insertion in model container [2021-01-06 10:11:21,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:11:21,306 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[BinaryExpression[ARITHMINUS,IdentifierExpression[~N~0,GLOBAL],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:11:21,513 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/reducercommutativity/max.i[1295,1308] [2021-01-06 10:11:21,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:11:21,529 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,IdentifierExpression[~N~0,GLOBAL],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:11:21,571 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/reducercommutativity/max.i[1295,1308] [2021-01-06 10:11:21,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:11:21,590 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:11:21,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21 WrapperNode [2021-01-06 10:11:21,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:11:21,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:11:21,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:11:21,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:11:21,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:11:21,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:11:21,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:11:21,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:11:21,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (1/1) ... [2021-01-06 10:11:21,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:11:21,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:11:21,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:11:21,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:11:21,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (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 10:11:21,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:11:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:11:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:11:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:11:21,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:11:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:11:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:11:22,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:11:22,484 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-01-06 10:11:22,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:11:22 BoogieIcfgContainer [2021-01-06 10:11:22,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:11:22,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:11:22,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:11:22,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:11:22,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:11:21" (1/3) ... [2021-01-06 10:11:22,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:11:22, skipping insertion in model container [2021-01-06 10:11:22,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:11:21" (2/3) ... [2021-01-06 10:11:22,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:11:22, skipping insertion in model container [2021-01-06 10:11:22,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:11:22" (3/3) ... [2021-01-06 10:11:22,495 INFO L111 eAbstractionObserver]: Analyzing ICFG max.i [2021-01-06 10:11:22,501 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:11:22,506 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:11:22,525 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:11:22,549 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:11:22,549 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:11:22,550 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:11:22,550 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:11:22,550 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:11:22,550 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:11:22,550 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:11:22,550 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:11:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-01-06 10:11:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:11:22,571 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:22,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:11:22,572 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:22,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1699142909, now seen corresponding path program 1 times [2021-01-06 10:11:22,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:22,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222448799] [2021-01-06 10:11:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:22,759 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 10:11:22,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222448799] [2021-01-06 10:11:22,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:11:22,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:11:22,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841162210] [2021-01-06 10:11:22,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:11:22,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:22,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:11:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:11:22,790 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-01-06 10:11:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:11:22,814 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-01-06 10:11:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:11:22,816 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2021-01-06 10:11:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:11:22,835 INFO L225 Difference]: With dead ends: 57 [2021-01-06 10:11:22,835 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:11:22,839 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 10:11:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:11:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 10:11:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:11:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-01-06 10:11:22,884 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2021-01-06 10:11:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:11:22,884 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-01-06 10:11:22,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:11:22,885 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-01-06 10:11:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:11:22,886 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:22,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:11:22,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:11:22,888 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:22,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2103090409, now seen corresponding path program 1 times [2021-01-06 10:11:22,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:22,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172347076] [2021-01-06 10:11:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:23,019 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 10:11:23,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172347076] [2021-01-06 10:11:23,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:11:23,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:11:23,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22764138] [2021-01-06 10:11:23,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:11:23,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:23,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:11:23,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:11:23,023 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2021-01-06 10:11:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:11:23,078 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-01-06 10:11:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:11:23,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-01-06 10:11:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:11:23,080 INFO L225 Difference]: With dead ends: 51 [2021-01-06 10:11:23,080 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:11:23,081 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 10:11:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:11:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-01-06 10:11:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:11:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-01-06 10:11:23,087 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-01-06 10:11:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:11:23,087 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-01-06 10:11:23,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:11:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-01-06 10:11:23,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:11:23,089 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:23,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:11:23,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:11:23,089 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash 777904804, now seen corresponding path program 1 times [2021-01-06 10:11:23,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:23,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405398703] [2021-01-06 10:11:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:11:23,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405398703] [2021-01-06 10:11:23,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:11:23,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:11:23,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053691957] [2021-01-06 10:11:23,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:11:23,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:23,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:11:23,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:11:23,170 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2021-01-06 10:11:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:11:23,257 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-01-06 10:11:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:11:23,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-01-06 10:11:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:11:23,259 INFO L225 Difference]: With dead ends: 53 [2021-01-06 10:11:23,259 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 10:11:23,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 10:11:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 10:11:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-01-06 10:11:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:11:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-01-06 10:11:23,267 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 20 [2021-01-06 10:11:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:11:23,268 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-01-06 10:11:23,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:11:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-01-06 10:11:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:11:23,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:23,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:11:23,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 10:11:23,269 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:23,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:23,270 INFO L82 PathProgramCache]: Analyzing trace with hash 922969028, now seen corresponding path program 1 times [2021-01-06 10:11:23,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:23,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538002745] [2021-01-06 10:11:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:11:23,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538002745] [2021-01-06 10:11:23,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:11:23,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:11:23,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962416062] [2021-01-06 10:11:23,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:11:23,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:23,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:11:23,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:11:23,405 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2021-01-06 10:11:23,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:11:23,482 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-01-06 10:11:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:11:23,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-01-06 10:11:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:11:23,485 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:11:23,485 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 10:11:23,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 10:11:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 10:11:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-01-06 10:11:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:11:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-01-06 10:11:23,505 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 28 [2021-01-06 10:11:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:11:23,506 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-01-06 10:11:23,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:11:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-01-06 10:11:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:11:23,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:23,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:11:23,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 10:11:23,508 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash -877480606, now seen corresponding path program 1 times [2021-01-06 10:11:23,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:23,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82794833] [2021-01-06 10:11:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:11:23,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82794833] [2021-01-06 10:11:23,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360281254] [2021-01-06 10:11:23,593 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 10:11:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:23,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:11:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:11:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:11:23,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:11:23,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:11:23,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035525284] [2021-01-06 10:11:23,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:11:23,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:11:23,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:11:23,804 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2021-01-06 10:11:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:11:23,900 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-01-06 10:11:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:11:23,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2021-01-06 10:11:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:11:23,901 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:11:23,902 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 10:11:23,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 10:11:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 10:11:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-01-06 10:11:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 10:11:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-01-06 10:11:23,909 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 30 [2021-01-06 10:11:23,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:11:23,909 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-01-06 10:11:23,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:11:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-01-06 10:11:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 10:11:23,911 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:23,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:11:24,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:11:24,125 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:24,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1033906211, now seen corresponding path program 2 times [2021-01-06 10:11:24,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:24,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127700501] [2021-01-06 10:11:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 10:11:24,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127700501] [2021-01-06 10:11:24,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304217072] [2021-01-06 10:11:24,215 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 10:11:24,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:11:24,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:11:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:11:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:11:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 10:11:24,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:11:24,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-01-06 10:11:24,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876622236] [2021-01-06 10:11:24,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:11:24,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:24,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:11:24,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:11:24,393 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 7 states. [2021-01-06 10:11:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:11:24,492 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2021-01-06 10:11:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:11:24,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2021-01-06 10:11:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:11:24,494 INFO L225 Difference]: With dead ends: 68 [2021-01-06 10:11:24,494 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 10:11:24,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:11:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 10:11:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2021-01-06 10:11:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:11:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-01-06 10:11:24,501 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 34 [2021-01-06 10:11:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:11:24,501 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-01-06 10:11:24,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:11:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-01-06 10:11:24,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:11:24,503 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:24,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:11:24,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:11:24,719 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:24,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1969265475, now seen corresponding path program 3 times [2021-01-06 10:11:24,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:24,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937230397] [2021-01-06 10:11:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:11:25,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937230397] [2021-01-06 10:11:25,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173993635] [2021-01-06 10:11:25,665 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 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 10:11:25,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:11:25,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:11:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 10:11:25,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:11:25,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:25,955 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 22 treesize of output 17 [2021-01-06 10:11:25,957 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:25,970 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:25,974 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:25,975 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-01-06 10:11:26,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:26,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:26,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:11:26,481 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:26,482 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 37 [2021-01-06 10:11:26,485 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:26,513 INFO L625 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-01-06 10:11:26,517 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 10:11:26,517 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:41 [2021-01-06 10:11:26,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:11:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:26,617 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:26,618 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 1 case distinctions, treesize of input 38 treesize of output 34 [2021-01-06 10:11:26,621 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:26,651 INFO L625 ElimStorePlain]: treesize reduction 11, result has 75.6 percent of original size [2021-01-06 10:11:26,654 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:11:26,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:31 [2021-01-06 10:11:26,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:26,963 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:26,964 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-01-06 10:11:26,973 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:11:26,976 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:11:26,980 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:11:26,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:11:26,986 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:11:26,988 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:11:26,991 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:11:27,033 INFO L625 ElimStorePlain]: treesize reduction 7, result has 84.4 percent of original size [2021-01-06 10:11:27,036 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:11:27,038 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:27,038 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:43 [2021-01-06 10:11:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 10:11:27,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:11:27,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 33 [2021-01-06 10:11:27,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446978530] [2021-01-06 10:11:27,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:11:27,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:27,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:11:27,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:11:27,252 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 33 states. [2021-01-06 10:11:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:11:30,138 INFO L93 Difference]: Finished difference Result 153 states and 187 transitions. [2021-01-06 10:11:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 10:11:30,138 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2021-01-06 10:11:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:11:30,141 INFO L225 Difference]: With dead ends: 153 [2021-01-06 10:11:30,141 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 10:11:30,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=402, Invalid=2904, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 10:11:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 10:11:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 72. [2021-01-06 10:11:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:11:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-01-06 10:11:30,159 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 42 [2021-01-06 10:11:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:11:30,159 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-01-06 10:11:30,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:11:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-01-06 10:11:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:11:30,161 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:30,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 10:11:30,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:11:30,375 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:30,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:30,376 INFO L82 PathProgramCache]: Analyzing trace with hash 520263487, now seen corresponding path program 1 times [2021-01-06 10:11:30,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:30,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91928587] [2021-01-06 10:11:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:31,884 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-01-06 10:11:32,043 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-01-06 10:11:32,290 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-01-06 10:11:32,722 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-01-06 10:11:32,951 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-01-06 10:11:33,170 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-01-06 10:11:33,481 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-01-06 10:11:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:11:34,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91928587] [2021-01-06 10:11:34,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543694787] [2021-01-06 10:11:34,923 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 10:11:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:35,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 86 conjunts are in the unsatisfiable core [2021-01-06 10:11:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:11:35,628 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:11:35,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:11:35,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:35,803 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 50 treesize of output 32 [2021-01-06 10:11:35,804 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:35,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:35,815 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 52 treesize of output 34 [2021-01-06 10:11:35,817 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:35,951 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-01-06 10:11:35,952 INFO L625 ElimStorePlain]: treesize reduction 18, result has 87.4 percent of original size [2021-01-06 10:11:35,960 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 10:11:35,961 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:177, output treesize:107 [2021-01-06 10:11:36,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:11:36,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-01-06 10:11:36,601 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:36,607 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-01-06 10:11:36,616 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:36,694 INFO L625 ElimStorePlain]: treesize reduction 16, result has 81.8 percent of original size [2021-01-06 10:11:36,696 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 10:11:36,696 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:134, output treesize:72 [2021-01-06 10:11:36,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:11:36,851 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 10:11:36,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:11:36,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-01-06 10:11:36,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269676428] [2021-01-06 10:11:36,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:11:36,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:36,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:11:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:11:36,857 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 26 states. [2021-01-06 10:11:37,929 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-01-06 10:11:38,792 WARN L197 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2021-01-06 10:11:39,510 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-01-06 10:11:39,812 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-01-06 10:11:40,099 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-01-06 10:11:40,601 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-01-06 10:11:41,050 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-01-06 10:11:41,517 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-01-06 10:11:41,979 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2021-01-06 10:11:42,265 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-01-06 10:11:42,632 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-01-06 10:11:43,071 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-01-06 10:11:43,344 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-01-06 10:11:43,686 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2021-01-06 10:11:44,015 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2021-01-06 10:11:44,256 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-01-06 10:11:44,703 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-01-06 10:11:45,155 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-01-06 10:11:45,525 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2021-01-06 10:11:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:11:45,650 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2021-01-06 10:11:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:11:45,651 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2021-01-06 10:11:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:11:45,652 INFO L225 Difference]: With dead ends: 135 [2021-01-06 10:11:45,652 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 10:11:45,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=255, Invalid=2607, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:11:45,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 10:11:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2021-01-06 10:11:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 10:11:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-01-06 10:11:45,673 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-01-06 10:11:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:11:45,673 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-01-06 10:11:45,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:11:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-01-06 10:11:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:11:45,675 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:45,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:11:45,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:11:45,891 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:45,892 INFO L82 PathProgramCache]: Analyzing trace with hash -289083139, now seen corresponding path program 1 times [2021-01-06 10:11:45,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:45,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230687977] [2021-01-06 10:11:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:11:47,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230687977] [2021-01-06 10:11:47,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982461604] [2021-01-06 10:11:47,498 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 10:11:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:47,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 10:11:47,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:11:48,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:48,137 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 0 case distinctions, treesize of input 42 treesize of output 22 [2021-01-06 10:11:48,139 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:48,153 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:48,154 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:48,154 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:37 [2021-01-06 10:11:48,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:48,634 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:48,635 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 1 case distinctions, treesize of input 40 treesize of output 25 [2021-01-06 10:11:48,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:48,647 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:48,648 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:48,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:35 [2021-01-06 10:11:48,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:11:48,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:48,727 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:48,727 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 1 case distinctions, treesize of input 44 treesize of output 38 [2021-01-06 10:11:48,729 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:48,753 INFO L625 ElimStorePlain]: treesize reduction 11, result has 76.6 percent of original size [2021-01-06 10:11:48,755 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:48,755 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:33 [2021-01-06 10:11:49,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:49,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:49,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:11:49,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:11:49,102 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:49,103 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 18 [2021-01-06 10:11:49,108 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:49,116 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:49,117 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:49,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:14 [2021-01-06 10:11:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:11:49,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:11:49,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 42 [2021-01-06 10:11:49,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048977771] [2021-01-06 10:11:49,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:11:49,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:49,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:11:49,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1588, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:11:49,206 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 42 states. [2021-01-06 10:11:52,086 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-01-06 10:11:52,929 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-01-06 10:11:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:11:53,586 INFO L93 Difference]: Finished difference Result 196 states and 234 transitions. [2021-01-06 10:11:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 10:11:53,587 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2021-01-06 10:11:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:11:53,589 INFO L225 Difference]: With dead ends: 196 [2021-01-06 10:11:53,589 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 10:11:53,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=574, Invalid=5278, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 10:11:53,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 10:11:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 127. [2021-01-06 10:11:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 10:11:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 156 transitions. [2021-01-06 10:11:53,613 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 156 transitions. Word has length 42 [2021-01-06 10:11:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:11:53,614 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 156 transitions. [2021-01-06 10:11:53,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:11:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 156 transitions. [2021-01-06 10:11:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:11:53,616 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:53,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 10:11:53,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:11:53,830 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:53,831 INFO L82 PathProgramCache]: Analyzing trace with hash -30917701, now seen corresponding path program 1 times [2021-01-06 10:11:53,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:53,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667308515] [2021-01-06 10:11:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:11:54,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667308515] [2021-01-06 10:11:54,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483154202] [2021-01-06 10:11:54,385 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 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 10:11:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:54,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 10:11:54,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:11:54,697 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 10:11:54,698 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:54,706 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:54,707 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:54,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-01-06 10:11:54,722 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 11 treesize of output 7 [2021-01-06 10:11:54,723 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:54,736 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:54,738 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:54,738 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2021-01-06 10:11:54,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:11:54,856 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:54,856 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-01-06 10:11:54,857 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:54,866 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:54,866 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:54,867 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:15 [2021-01-06 10:11:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:11:54,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:11:54,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-01-06 10:11:54,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494866905] [2021-01-06 10:11:54,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:11:54,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:54,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:11:54,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:11:54,914 INFO L87 Difference]: Start difference. First operand 127 states and 156 transitions. Second operand 25 states. [2021-01-06 10:11:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:11:56,648 INFO L93 Difference]: Finished difference Result 302 states and 364 transitions. [2021-01-06 10:11:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:11:56,649 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2021-01-06 10:11:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:11:56,651 INFO L225 Difference]: With dead ends: 302 [2021-01-06 10:11:56,651 INFO L226 Difference]: Without dead ends: 289 [2021-01-06 10:11:56,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=442, Invalid=1450, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:11:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-01-06 10:11:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 169. [2021-01-06 10:11:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 10:11:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 210 transitions. [2021-01-06 10:11:56,691 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 210 transitions. Word has length 42 [2021-01-06 10:11:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:11:56,691 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 210 transitions. [2021-01-06 10:11:56,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:11:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 210 transitions. [2021-01-06 10:11:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:11:56,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:11:56,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:11:56,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:11:56,909 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:11:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:11:56,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1851475775, now seen corresponding path program 1 times [2021-01-06 10:11:56,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:11:56,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056012793] [2021-01-06 10:11:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:11:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:11:57,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056012793] [2021-01-06 10:11:57,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49391709] [2021-01-06 10:11:57,332 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 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 10:11:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:11:57,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 10:11:57,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:11:57,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:11:57,545 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 22 treesize of output 17 [2021-01-06 10:11:57,547 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:57,562 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:57,564 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:57,564 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-01-06 10:11:57,826 INFO L348 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-01-06 10:11:57,827 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 27 treesize of output 20 [2021-01-06 10:11:57,830 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:57,839 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:57,840 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:57,840 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2021-01-06 10:11:57,961 INFO L348 Elim1Store]: treesize reduction 10, result has 88.2 percent of original size [2021-01-06 10:11:57,962 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 93 [2021-01-06 10:11:57,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:11:57,965 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:11:57,971 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:11:58,013 INFO L625 ElimStorePlain]: treesize reduction 69, result has 29.6 percent of original size [2021-01-06 10:11:58,017 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:58,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:14 [2021-01-06 10:11:58,067 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:11:58,068 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-01-06 10:11:58,070 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:11:58,072 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:11:58,074 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:11:58,087 INFO L625 ElimStorePlain]: treesize reduction 7, result has 58.8 percent of original size [2021-01-06 10:11:58,088 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:11:58,088 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:10 [2021-01-06 10:11:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:11:58,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:11:58,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2021-01-06 10:11:58,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835065238] [2021-01-06 10:11:58,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:11:58,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:11:58,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:11:58,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:11:58,146 INFO L87 Difference]: Start difference. First operand 169 states and 210 transitions. Second operand 24 states. [2021-01-06 10:12:00,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:12:00,343 INFO L93 Difference]: Finished difference Result 344 states and 418 transitions. [2021-01-06 10:12:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 10:12:00,344 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2021-01-06 10:12:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:12:00,346 INFO L225 Difference]: With dead ends: 344 [2021-01-06 10:12:00,346 INFO L226 Difference]: Without dead ends: 296 [2021-01-06 10:12:00,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=389, Invalid=2803, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 10:12:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-01-06 10:12:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 192. [2021-01-06 10:12:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-01-06 10:12:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 237 transitions. [2021-01-06 10:12:00,369 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 237 transitions. Word has length 42 [2021-01-06 10:12:00,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:12:00,370 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 237 transitions. [2021-01-06 10:12:00,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:12:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 237 transitions. [2021-01-06 10:12:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:12:00,372 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:12:00,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:12:00,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:12:00,588 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:12:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:12:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash -727628103, now seen corresponding path program 1 times [2021-01-06 10:12:00,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:12:00,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168847406] [2021-01-06 10:12:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:12:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:12:01,865 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-01-06 10:12:02,067 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-01-06 10:12:02,325 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2021-01-06 10:12:02,624 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-01-06 10:12:02,828 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-01-06 10:12:03,145 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-01-06 10:12:03,353 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-01-06 10:12:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:12:05,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168847406] [2021-01-06 10:12:05,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917711451] [2021-01-06 10:12:05,143 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 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 10:12:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:12:05,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 94 conjunts are in the unsatisfiable core [2021-01-06 10:12:05,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:12:05,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:12:05,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:12:05,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:12:05,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:12:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:06,017 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 0 case distinctions, treesize of input 64 treesize of output 38 [2021-01-06 10:12:06,020 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:06,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:06,034 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 0 case distinctions, treesize of input 63 treesize of output 37 [2021-01-06 10:12:06,037 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:06,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:06,054 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 0 case distinctions, treesize of input 62 treesize of output 36 [2021-01-06 10:12:06,055 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:06,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:06,064 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 0 case distinctions, treesize of input 61 treesize of output 35 [2021-01-06 10:12:06,068 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:06,212 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-01-06 10:12:06,213 INFO L625 ElimStorePlain]: treesize reduction 60, result has 66.7 percent of original size [2021-01-06 10:12:06,214 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 10:12:06,215 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:311, output treesize:120 [2021-01-06 10:12:06,537 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:12:06,541 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:12:06,545 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 10:12:06,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:12:06,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-01-06 10:12:06,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025992377] [2021-01-06 10:12:06,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:12:06,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:12:06,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:12:06,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:12:06,547 INFO L87 Difference]: Start difference. First operand 192 states and 237 transitions. Second operand 31 states. [2021-01-06 10:12:07,984 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-01-06 10:12:08,323 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-01-06 10:12:08,741 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-01-06 10:12:09,049 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 10:12:09,322 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-01-06 10:12:10,053 WARN L197 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2021-01-06 10:12:10,376 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-01-06 10:12:10,972 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-01-06 10:12:11,362 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-01-06 10:12:11,918 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-01-06 10:12:12,475 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-01-06 10:12:12,969 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-01-06 10:12:13,644 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 47 [2021-01-06 10:12:14,179 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 45 [2021-01-06 10:12:14,767 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-01-06 10:12:15,332 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-01-06 10:12:15,741 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2021-01-06 10:12:16,264 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2021-01-06 10:12:16,600 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-01-06 10:12:17,034 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 60 [2021-01-06 10:12:17,360 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-01-06 10:12:17,750 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-01-06 10:12:18,106 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 52 [2021-01-06 10:12:18,554 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 52 [2021-01-06 10:12:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:12:18,701 INFO L93 Difference]: Finished difference Result 314 states and 382 transitions. [2021-01-06 10:12:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:12:18,702 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 42 [2021-01-06 10:12:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:12:18,704 INFO L225 Difference]: With dead ends: 314 [2021-01-06 10:12:18,705 INFO L226 Difference]: Without dead ends: 309 [2021-01-06 10:12:18,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=402, Invalid=3758, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 10:12:18,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-01-06 10:12:18,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 257. [2021-01-06 10:12:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2021-01-06 10:12:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 319 transitions. [2021-01-06 10:12:18,739 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 319 transitions. Word has length 42 [2021-01-06 10:12:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:12:18,739 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 319 transitions. [2021-01-06 10:12:18,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:12:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 319 transitions. [2021-01-06 10:12:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:12:18,741 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:12:18,741 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:12:18,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:12:18,955 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:12:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:12:18,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1723719811, now seen corresponding path program 1 times [2021-01-06 10:12:18,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:12:18,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749063971] [2021-01-06 10:12:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:12:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:12:19,601 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-01-06 10:12:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:12:20,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749063971] [2021-01-06 10:12:20,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589195152] [2021-01-06 10:12:20,829 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:12:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:12:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 10:12:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:12:21,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:21,482 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:21,482 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 1 case distinctions, treesize of input 43 treesize of output 23 [2021-01-06 10:12:21,484 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:21,496 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:21,497 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:12:21,498 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:24 [2021-01-06 10:12:21,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:21,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:21,633 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:21,633 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 33 [2021-01-06 10:12:21,636 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:21,660 INFO L625 ElimStorePlain]: treesize reduction 13, result has 65.8 percent of original size [2021-01-06 10:12:21,662 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:12:21,662 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:25 [2021-01-06 10:12:21,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:21,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:21,752 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:21,752 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 1 case distinctions, treesize of input 34 treesize of output 32 [2021-01-06 10:12:21,754 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:21,780 INFO L625 ElimStorePlain]: treesize reduction 7, result has 80.0 percent of original size [2021-01-06 10:12:21,781 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:12:21,782 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-01-06 10:12:22,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:22,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:22,115 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:22,116 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2021-01-06 10:12:22,122 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:22,132 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:22,133 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:12:22,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:10 [2021-01-06 10:12:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 10:12:22,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:12:22,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 37 [2021-01-06 10:12:22,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371434498] [2021-01-06 10:12:22,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:12:22,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:12:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:12:22,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1221, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:12:22,223 INFO L87 Difference]: Start difference. First operand 257 states and 319 transitions. Second operand 37 states. [2021-01-06 10:12:22,598 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-01-06 10:12:23,001 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-01-06 10:12:24,401 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-01-06 10:12:25,985 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-01-06 10:12:26,163 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-01-06 10:12:26,899 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-01-06 10:12:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:12:27,375 INFO L93 Difference]: Finished difference Result 376 states and 460 transitions. [2021-01-06 10:12:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:12:27,376 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2021-01-06 10:12:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:12:27,379 INFO L225 Difference]: With dead ends: 376 [2021-01-06 10:12:27,379 INFO L226 Difference]: Without dead ends: 363 [2021-01-06 10:12:27,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=531, Invalid=4161, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 10:12:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-01-06 10:12:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 255. [2021-01-06 10:12:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2021-01-06 10:12:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 318 transitions. [2021-01-06 10:12:27,411 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 318 transitions. Word has length 42 [2021-01-06 10:12:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:12:27,412 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 318 transitions. [2021-01-06 10:12:27,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:12:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 318 transitions. [2021-01-06 10:12:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:12:27,413 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:12:27,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:12:27,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:12:27,628 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:12:27,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:12:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1761900859, now seen corresponding path program 1 times [2021-01-06 10:12:27,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:12:27,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612331838] [2021-01-06 10:12:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:12:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:12:28,478 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-01-06 10:12:28,604 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-01-06 10:12:28,743 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-01-06 10:12:29,358 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-01-06 10:12:29,650 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-01-06 10:12:29,915 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-01-06 10:12:30,174 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-01-06 10:12:30,434 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-01-06 10:12:30,694 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-01-06 10:12:31,014 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-01-06 10:12:31,296 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-01-06 10:12:31,566 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-01-06 10:12:31,837 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-01-06 10:12:32,144 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2021-01-06 10:12:32,483 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2021-01-06 10:12:32,752 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-01-06 10:12:33,008 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-01-06 10:12:33,268 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-01-06 10:12:33,545 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-01-06 10:12:33,905 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-01-06 10:12:34,186 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-01-06 10:12:34,480 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-01-06 10:12:34,781 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-01-06 10:12:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:12:35,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612331838] [2021-01-06 10:12:35,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176243756] [2021-01-06 10:12:35,485 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:12:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:12:35,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 109 conjunts are in the unsatisfiable core [2021-01-06 10:12:35,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:12:36,635 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:12:36,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:36,652 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 0 case distinctions, treesize of input 45 treesize of output 27 [2021-01-06 10:12:36,655 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:36,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:36,666 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 0 case distinctions, treesize of input 47 treesize of output 29 [2021-01-06 10:12:36,668 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:36,753 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:36,755 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 10:12:36,755 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:129, output treesize:85 [2021-01-06 10:12:37,814 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 8, 1] term [2021-01-06 10:12:37,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:12:38,069 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:12:38,584 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 7, 1] term [2021-01-06 10:12:38,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:12:38,921 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-01-06 10:12:39,268 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-01-06 10:12:39,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:12:39,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:12:39,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:12:39,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:39,297 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 0 case distinctions, treesize of input 82 treesize of output 47 [2021-01-06 10:12:39,304 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:39,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:39,320 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 0 case distinctions, treesize of input 80 treesize of output 45 [2021-01-06 10:12:39,330 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:39,351 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 0 case distinctions, treesize of input 78 treesize of output 43 [2021-01-06 10:12:39,358 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:39,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:39,373 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 0 case distinctions, treesize of input 80 treesize of output 45 [2021-01-06 10:12:39,380 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:39,966 WARN L197 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-01-06 10:12:39,968 INFO L625 ElimStorePlain]: treesize reduction 63, result has 83.4 percent of original size [2021-01-06 10:12:39,971 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-01-06 10:12:39,971 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:357, output treesize:316 [2021-01-06 10:12:40,568 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-01-06 10:12:40,598 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2021-01-06 10:12:40,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:40,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:40,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:40,666 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 0 case distinctions, treesize of input 70 treesize of output 51 [2021-01-06 10:12:40,668 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:41,539 WARN L197 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-01-06 10:12:41,540 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:41,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:41,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:41,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:41,560 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 0 case distinctions, treesize of input 68 treesize of output 49 [2021-01-06 10:12:41,563 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:42,011 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-01-06 10:12:42,013 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:42,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:42,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:42,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:42,033 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 0 case distinctions, treesize of input 81 treesize of output 62 [2021-01-06 10:12:42,038 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:42,396 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-01-06 10:12:42,397 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:42,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:42,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:42,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:42,419 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 0 case distinctions, treesize of input 66 treesize of output 47 [2021-01-06 10:12:42,421 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:42,756 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-01-06 10:12:42,757 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:42,768 INFO L547 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-01-06 10:12:42,769 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:412, output treesize:446 [2021-01-06 10:12:43,768 WARN L197 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-01-06 10:12:44,413 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-01-06 10:12:45,078 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-01-06 10:12:45,693 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-01-06 10:12:45,703 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 4, 10, 1] term [2021-01-06 10:12:45,704 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2021-01-06 10:12:45,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:45,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:45,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:45,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:45,759 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:45,760 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 40 [2021-01-06 10:12:45,766 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:46,168 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-01-06 10:12:46,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:46,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:46,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:46,200 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:46,201 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-01-06 10:12:46,207 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:46,498 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-01-06 10:12:46,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:46,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:46,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:46,524 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:46,525 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 42 [2021-01-06 10:12:46,529 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:46,786 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-01-06 10:12:46,787 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:46,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:46,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:46,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:12:46,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:12:46,810 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:46,811 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 38 [2021-01-06 10:12:46,815 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-01-06 10:12:47,079 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-01-06 10:12:47,080 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:12:47,083 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-01-06 10:12:47,084 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:376, output treesize:216 [2021-01-06 10:12:47,648 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-01-06 10:12:47,659 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2021-01-06 10:12:48,560 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-01-06 10:12:49,071 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 8, 1] term [2021-01-06 10:12:49,071 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:12:49,508 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:12:49,762 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:12:49,781 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 10:12:49,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:12:49,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-01-06 10:12:49,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785040348] [2021-01-06 10:12:49,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:12:49,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:12:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:12:49,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3473, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 10:12:49,784 INFO L87 Difference]: Start difference. First operand 255 states and 318 transitions. Second operand 35 states. [2021-01-06 10:12:50,282 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-01-06 10:12:50,730 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-01-06 10:12:51,121 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-01-06 10:12:51,429 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-01-06 10:12:52,066 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-01-06 10:12:53,359 WARN L197 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-01-06 10:12:54,089 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-01-06 10:12:54,575 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-01-06 10:12:55,214 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2021-01-06 10:12:56,113 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 57 [2021-01-06 10:12:56,812 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2021-01-06 10:12:57,269 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-01-06 10:12:58,105 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-01-06 10:12:58,761 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-01-06 10:12:59,235 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-01-06 10:13:00,121 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 48 [2021-01-06 10:13:01,500 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 52 [2021-01-06 10:13:02,463 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-01-06 10:13:03,149 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-01-06 10:13:03,917 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2021-01-06 10:13:04,596 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2021-01-06 10:13:05,193 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-01-06 10:13:05,807 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-01-06 10:13:06,568 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 64 [2021-01-06 10:13:07,254 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-01-06 10:13:07,851 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-01-06 10:13:08,758 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2021-01-06 10:13:09,528 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 55 [2021-01-06 10:13:10,351 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 55 [2021-01-06 10:13:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:13:10,624 INFO L93 Difference]: Finished difference Result 299 states and 368 transitions. [2021-01-06 10:13:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:13:10,627 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2021-01-06 10:13:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:13:10,629 INFO L225 Difference]: With dead ends: 299 [2021-01-06 10:13:10,629 INFO L226 Difference]: Without dead ends: 294 [2021-01-06 10:13:10,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=566, Invalid=7444, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 10:13:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-01-06 10:13:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 255. [2021-01-06 10:13:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2021-01-06 10:13:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 318 transitions. [2021-01-06 10:13:10,663 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 318 transitions. Word has length 42 [2021-01-06 10:13:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:13:10,663 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 318 transitions. [2021-01-06 10:13:10,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:13:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 318 transitions. [2021-01-06 10:13:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:13:10,664 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:13:10,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:13:10,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:13:10,879 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:13:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:13:10,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1453765369, now seen corresponding path program 1 times [2021-01-06 10:13:10,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:13:10,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078752466] [2021-01-06 10:13:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:13:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:11,092 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-01-06 10:13:11,269 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-01-06 10:13:11,459 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-01-06 10:13:11,610 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-01-06 10:13:11,747 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-01-06 10:13:11,883 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-01-06 10:13:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:13:12,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078752466] [2021-01-06 10:13:12,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427042426] [2021-01-06 10:13:12,393 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:13:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:12,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 10:13:12,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:13:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:12,762 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 22 treesize of output 17 [2021-01-06 10:13:12,766 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:12,799 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:12,802 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:12,803 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-01-06 10:13:13,301 INFO L348 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-01-06 10:13:13,302 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 27 treesize of output 20 [2021-01-06 10:13:13,304 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:13,323 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:13,325 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:13,326 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2021-01-06 10:13:13,565 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-01-06 10:13:13,567 INFO L348 Elim1Store]: treesize reduction 10, result has 88.2 percent of original size [2021-01-06 10:13:13,567 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 93 [2021-01-06 10:13:13,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:13:13,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:13,580 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:13,678 INFO L625 ElimStorePlain]: treesize reduction 69, result has 29.6 percent of original size [2021-01-06 10:13:13,685 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:13,685 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:14 [2021-01-06 10:13:13,791 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:13,792 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-01-06 10:13:13,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:13,798 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:13,804 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:13:13,838 INFO L625 ElimStorePlain]: treesize reduction 7, result has 58.8 percent of original size [2021-01-06 10:13:13,839 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:13,840 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:10 [2021-01-06 10:13:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:13:13,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:13:13,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-01-06 10:13:13,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847184002] [2021-01-06 10:13:13,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:13:13,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:13:13,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:13:13,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:13:13,965 INFO L87 Difference]: Start difference. First operand 255 states and 318 transitions. Second operand 27 states. [2021-01-06 10:13:14,307 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-01-06 10:13:15,440 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-01-06 10:13:15,609 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-01-06 10:13:16,555 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-01-06 10:13:18,060 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-01-06 10:13:18,429 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-01-06 10:13:18,917 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-01-06 10:13:19,204 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-01-06 10:13:19,499 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-01-06 10:13:19,835 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-01-06 10:13:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:13:20,871 INFO L93 Difference]: Finished difference Result 467 states and 562 transitions. [2021-01-06 10:13:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 10:13:20,874 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 42 [2021-01-06 10:13:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:13:20,877 INFO L225 Difference]: With dead ends: 467 [2021-01-06 10:13:20,877 INFO L226 Difference]: Without dead ends: 425 [2021-01-06 10:13:20,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=896, Invalid=4360, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 10:13:20,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-01-06 10:13:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 270. [2021-01-06 10:13:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2021-01-06 10:13:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 333 transitions. [2021-01-06 10:13:20,912 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 333 transitions. Word has length 42 [2021-01-06 10:13:20,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:13:20,912 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 333 transitions. [2021-01-06 10:13:20,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:13:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 333 transitions. [2021-01-06 10:13:20,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:13:20,913 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:13:20,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:13:21,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:13:21,129 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:13:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:13:21,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1672297661, now seen corresponding path program 1 times [2021-01-06 10:13:21,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:13:21,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785916852] [2021-01-06 10:13:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:13:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:21,547 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-01-06 10:13:21,784 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-01-06 10:13:21,959 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-01-06 10:13:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:13:22,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785916852] [2021-01-06 10:13:22,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373685459] [2021-01-06 10:13:22,306 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:13:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:22,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 10:13:22,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:13:22,865 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 10:13:22,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:22,882 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:22,883 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:22,884 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-01-06 10:13:22,996 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 10:13:22,998 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:23,022 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:23,025 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:13:23,025 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:25 [2021-01-06 10:13:23,327 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:23,328 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-01-06 10:13:23,330 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:23,335 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:23,338 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:13:23,382 INFO L625 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-01-06 10:13:23,386 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:23,386 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:31, output treesize:7 [2021-01-06 10:13:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:13:23,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:13:23,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-01-06 10:13:23,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477070476] [2021-01-06 10:13:23,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:13:23,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:13:23,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:13:23,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:13:23,496 INFO L87 Difference]: Start difference. First operand 270 states and 333 transitions. Second operand 25 states. [2021-01-06 10:13:25,611 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-01-06 10:13:27,773 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-01-06 10:13:29,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:13:29,143 INFO L93 Difference]: Finished difference Result 419 states and 506 transitions. [2021-01-06 10:13:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:13:29,145 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2021-01-06 10:13:29,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:13:29,147 INFO L225 Difference]: With dead ends: 419 [2021-01-06 10:13:29,148 INFO L226 Difference]: Without dead ends: 375 [2021-01-06 10:13:29,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=447, Invalid=2975, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 10:13:29,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-01-06 10:13:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 258. [2021-01-06 10:13:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2021-01-06 10:13:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 317 transitions. [2021-01-06 10:13:29,183 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 317 transitions. Word has length 42 [2021-01-06 10:13:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:13:29,183 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 317 transitions. [2021-01-06 10:13:29,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:13:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 317 transitions. [2021-01-06 10:13:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:13:29,184 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:13:29,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 10:13:29,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:13:29,400 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:13:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:13:29,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1756987401, now seen corresponding path program 1 times [2021-01-06 10:13:29,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:13:29,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848859207] [2021-01-06 10:13:29,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:13:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:29,643 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-01-06 10:13:29,762 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-01-06 10:13:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:13:30,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848859207] [2021-01-06 10:13:30,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592430986] [2021-01-06 10:13:30,432 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:13:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:30,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 10:13:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:13:30,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:30,987 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:30,988 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 1 case distinctions, treesize of input 37 treesize of output 23 [2021-01-06 10:13:30,993 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:31,018 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:31,020 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:31,020 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-01-06 10:13:31,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:31,460 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:31,460 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2021-01-06 10:13:31,464 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:31,478 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:31,479 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:31,480 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-01-06 10:13:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:13:31,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:13:31,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-01-06 10:13:31,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102950635] [2021-01-06 10:13:31,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:13:31,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:13:31,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:13:31,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:13:31,600 INFO L87 Difference]: Start difference. First operand 258 states and 317 transitions. Second operand 24 states. [2021-01-06 10:13:33,191 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-01-06 10:13:33,490 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-01-06 10:13:33,717 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-01-06 10:13:34,670 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-01-06 10:13:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:13:35,445 INFO L93 Difference]: Finished difference Result 395 states and 482 transitions. [2021-01-06 10:13:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:13:35,448 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2021-01-06 10:13:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:13:35,450 INFO L225 Difference]: With dead ends: 395 [2021-01-06 10:13:35,450 INFO L226 Difference]: Without dead ends: 329 [2021-01-06 10:13:35,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=262, Invalid=1544, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:13:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-01-06 10:13:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 263. [2021-01-06 10:13:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2021-01-06 10:13:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 323 transitions. [2021-01-06 10:13:35,487 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 323 transitions. Word has length 42 [2021-01-06 10:13:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:13:35,487 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 323 transitions. [2021-01-06 10:13:35,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:13:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 323 transitions. [2021-01-06 10:13:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:13:35,488 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:13:35,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 10:13:35,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:13:35,705 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:13:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:13:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1541888187, now seen corresponding path program 1 times [2021-01-06 10:13:35,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:13:35,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641684855] [2021-01-06 10:13:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:13:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:36,070 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-01-06 10:13:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:13:37,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641684855] [2021-01-06 10:13:37,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143892154] [2021-01-06 10:13:37,107 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:13:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 10:13:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:13:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:37,853 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:37,854 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 1 case distinctions, treesize of input 37 treesize of output 23 [2021-01-06 10:13:37,858 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:37,883 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:37,886 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:37,886 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:19 [2021-01-06 10:13:38,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:38,056 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 27 treesize of output 20 [2021-01-06 10:13:38,058 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:38,079 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:38,081 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:38,081 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:29 [2021-01-06 10:13:38,224 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:38,224 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 1 case distinctions, treesize of input 30 treesize of output 21 [2021-01-06 10:13:38,227 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:38,249 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:38,252 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:38,252 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-01-06 10:13:38,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:13:38,371 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:38,372 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-01-06 10:13:38,378 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:38,393 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:38,395 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:13:38,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-01-06 10:13:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:13:38,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:13:38,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 29 [2021-01-06 10:13:38,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463283695] [2021-01-06 10:13:38,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:13:38,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:13:38,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:13:38,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:13:38,520 INFO L87 Difference]: Start difference. First operand 263 states and 323 transitions. Second operand 29 states. [2021-01-06 10:13:39,004 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-01-06 10:13:39,287 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-01-06 10:13:39,523 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-01-06 10:13:39,793 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-01-06 10:13:40,066 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-01-06 10:13:40,412 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-01-06 10:13:41,606 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-01-06 10:13:41,798 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-01-06 10:13:42,042 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-01-06 10:13:42,231 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-01-06 10:13:42,543 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-01-06 10:13:42,759 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-01-06 10:13:43,319 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-01-06 10:13:43,663 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-01-06 10:13:46,003 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-01-06 10:13:46,383 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-01-06 10:13:46,677 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-01-06 10:13:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:13:47,046 INFO L93 Difference]: Finished difference Result 347 states and 415 transitions. [2021-01-06 10:13:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:13:47,049 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2021-01-06 10:13:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:13:47,050 INFO L225 Difference]: With dead ends: 347 [2021-01-06 10:13:47,050 INFO L226 Difference]: Without dead ends: 280 [2021-01-06 10:13:47,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=531, Invalid=3375, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 10:13:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-01-06 10:13:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 232. [2021-01-06 10:13:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2021-01-06 10:13:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 280 transitions. [2021-01-06 10:13:47,084 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 280 transitions. Word has length 42 [2021-01-06 10:13:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:13:47,084 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 280 transitions. [2021-01-06 10:13:47,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:13:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 280 transitions. [2021-01-06 10:13:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:13:47,093 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:13:47,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:13:47,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:13:47,309 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:13:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:13:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1381032263, now seen corresponding path program 1 times [2021-01-06 10:13:47,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:13:47,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445122812] [2021-01-06 10:13:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:13:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-01-06 10:13:47,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445122812] [2021-01-06 10:13:47,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:13:47,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-01-06 10:13:47,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043917085] [2021-01-06 10:13:47,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:13:47,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:13:47,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:13:47,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:13:47,706 INFO L87 Difference]: Start difference. First operand 232 states and 280 transitions. Second operand 13 states. [2021-01-06 10:13:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:13:48,259 INFO L93 Difference]: Finished difference Result 345 states and 411 transitions. [2021-01-06 10:13:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:13:48,261 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2021-01-06 10:13:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:13:48,263 INFO L225 Difference]: With dead ends: 345 [2021-01-06 10:13:48,263 INFO L226 Difference]: Without dead ends: 340 [2021-01-06 10:13:48,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:13:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-01-06 10:13:48,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 268. [2021-01-06 10:13:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2021-01-06 10:13:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 327 transitions. [2021-01-06 10:13:48,300 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 327 transitions. Word has length 42 [2021-01-06 10:13:48,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:13:48,301 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 327 transitions. [2021-01-06 10:13:48,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:13:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 327 transitions. [2021-01-06 10:13:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:13:48,302 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:13:48,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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 10:13:48,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-01-06 10:13:48,302 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:13:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:13:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2088303238, now seen corresponding path program 2 times [2021-01-06 10:13:48,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:13:48,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546205355] [2021-01-06 10:13:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:13:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:13:48,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546205355] [2021-01-06 10:13:48,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332619117] [2021-01-06 10:13:48,453 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:13:48,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:13:48,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:13:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:13:48,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:13:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:13:48,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:13:48,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 10:13:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568235770] [2021-01-06 10:13:48,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:13:48,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:13:48,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:13:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:13:48,760 INFO L87 Difference]: Start difference. First operand 268 states and 327 transitions. Second operand 13 states. [2021-01-06 10:13:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:13:49,342 INFO L93 Difference]: Finished difference Result 417 states and 503 transitions. [2021-01-06 10:13:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:13:49,344 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2021-01-06 10:13:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:13:49,347 INFO L225 Difference]: With dead ends: 417 [2021-01-06 10:13:49,347 INFO L226 Difference]: Without dead ends: 201 [2021-01-06 10:13:49,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:13:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-01-06 10:13:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 154. [2021-01-06 10:13:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 10:13:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 190 transitions. [2021-01-06 10:13:49,367 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 190 transitions. Word has length 46 [2021-01-06 10:13:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:13:49,367 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 190 transitions. [2021-01-06 10:13:49,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:13:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 190 transitions. [2021-01-06 10:13:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:13:49,368 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:13:49,369 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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 10:13:49,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:13:49,582 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:13:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:13:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2046875962, now seen corresponding path program 3 times [2021-01-06 10:13:49,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:13:49,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551659527] [2021-01-06 10:13:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:13:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:13:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:13:49,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551659527] [2021-01-06 10:13:49,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332104902] [2021-01-06 10:13:49,726 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:13:49,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:13:49,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:13:49,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 10:13:49,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:13:50,238 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:13:50,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:50,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:50,540 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:50,541 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 84 [2021-01-06 10:13:50,546 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:50,551 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:50,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:50,664 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:50,665 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 86 [2021-01-06 10:13:50,672 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:50,679 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:51,413 WARN L197 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-01-06 10:13:51,415 INFO L625 ElimStorePlain]: treesize reduction 105, result has 64.3 percent of original size [2021-01-06 10:13:51,418 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:13:51,428 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:13:51,430 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-01-06 10:13:51,430 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:147, output treesize:171 [2021-01-06 10:13:51,433 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:13:51,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:13:51,710 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 10:13:51,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:13:51,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:13:51,899 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 9, 1] term [2021-01-06 10:13:51,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:51,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:13:51,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:13:52,428 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-01-06 10:13:52,907 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-01-06 10:13:53,043 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 4, 8, 1] term [2021-01-06 10:13:53,043 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2021-01-06 10:13:54,683 WARN L197 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2021-01-06 10:13:54,700 INFO L639 QuantifierPusher]: Distributing 6 conjuncts over 2 disjuncts [2021-01-06 10:13:54,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:54,738 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-01-06 10:13:54,742 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:54,757 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-01-06 10:13:54,760 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:54,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:54,780 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-01-06 10:13:54,785 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:54,799 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-01-06 10:13:54,805 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:54,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:54,828 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-01-06 10:13:54,833 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:54,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:13:54,851 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:54,851 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-01-06 10:13:54,856 INFO L547 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:55,330 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-01-06 10:13:55,332 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:55,338 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 6 xjuncts. [2021-01-06 10:13:55,338 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:451, output treesize:261 [2021-01-06 10:13:56,930 WARN L197 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-01-06 10:13:56,965 INFO L639 QuantifierPusher]: Distributing 6 conjuncts over 2 disjuncts [2021-01-06 10:13:57,652 WARN L197 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-01-06 10:13:57,665 INFO L639 QuantifierPusher]: Distributing 6 conjuncts over 2 disjuncts [2021-01-06 10:13:58,171 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-01-06 10:13:58,179 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:58,206 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 20 treesize of output 16 [2021-01-06 10:13:58,209 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:58,391 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-01-06 10:13:58,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:58,405 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 21 treesize of output 17 [2021-01-06 10:13:58,407 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:13:58,581 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-01-06 10:13:58,583 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:58,586 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 10:13:58,587 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:124, output treesize:119 [2021-01-06 10:13:59,043 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-01-06 10:13:59,078 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 11, 1] term [2021-01-06 10:13:59,079 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:59,665 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-01-06 10:13:59,679 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 11, 1] term [2021-01-06 10:13:59,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:13:59,719 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:59,720 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-01-06 10:13:59,725 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 10:13:59,909 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-01-06 10:13:59,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:59,935 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:13:59,936 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-01-06 10:13:59,939 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-01-06 10:14:00,113 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-01-06 10:14:00,114 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:14:00,117 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 10:14:00,118 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:129, output treesize:117 [2021-01-06 10:14:00,546 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-01-06 10:14:01,257 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-01-06 10:14:01,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:01,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:01,967 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-01-06 10:14:01,977 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:01,978 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:01,979 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:02,303 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-01-06 10:14:02,321 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:02,967 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-01-06 10:14:04,051 WARN L197 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-01-06 10:14:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:14:04,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:04,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 24] total 31 [2021-01-06 10:14:04,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172506717] [2021-01-06 10:14:04,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:14:04,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:04,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:14:04,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:14:04,172 INFO L87 Difference]: Start difference. First operand 154 states and 190 transitions. Second operand 31 states. [2021-01-06 10:14:08,595 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-01-06 10:14:09,267 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2021-01-06 10:14:10,200 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 92 [2021-01-06 10:14:11,164 WARN L197 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2021-01-06 10:14:12,072 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-01-06 10:14:13,860 WARN L197 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-01-06 10:14:14,628 WARN L197 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-01-06 10:14:16,107 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-01-06 10:14:17,135 WARN L197 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-01-06 10:14:17,974 WARN L197 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-01-06 10:14:19,236 WARN L197 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-01-06 10:14:20,735 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2021-01-06 10:14:22,413 WARN L197 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 129 DAG size of output: 99 [2021-01-06 10:14:23,595 WARN L197 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-01-06 10:14:24,552 WARN L197 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-01-06 10:14:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:26,464 INFO L93 Difference]: Finished difference Result 274 states and 335 transitions. [2021-01-06 10:14:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 10:14:26,468 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 46 [2021-01-06 10:14:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:26,469 INFO L225 Difference]: With dead ends: 274 [2021-01-06 10:14:26,469 INFO L226 Difference]: Without dead ends: 220 [2021-01-06 10:14:26,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=598, Invalid=4514, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 10:14:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-01-06 10:14:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 160. [2021-01-06 10:14:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:14:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 196 transitions. [2021-01-06 10:14:26,494 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 196 transitions. Word has length 46 [2021-01-06 10:14:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:26,494 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 196 transitions. [2021-01-06 10:14:26,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:14:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 196 transitions. [2021-01-06 10:14:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 10:14:26,495 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:26,495 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:26,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:26,704 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1563184102, now seen corresponding path program 4 times [2021-01-06 10:14:26,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:26,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594129587] [2021-01-06 10:14:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 10:14:26,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594129587] [2021-01-06 10:14:26,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981188363] [2021-01-06 10:14:26,893 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:27,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:14:27,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:14:27,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 10:14:27,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:27,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-01-06 10:14:27,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460116769] [2021-01-06 10:14:27,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:14:27,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:27,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:14:27,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:14:27,428 INFO L87 Difference]: Start difference. First operand 160 states and 196 transitions. Second operand 11 states. [2021-01-06 10:14:28,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:28,290 INFO L93 Difference]: Finished difference Result 199 states and 243 transitions. [2021-01-06 10:14:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:14:28,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2021-01-06 10:14:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:28,297 INFO L225 Difference]: With dead ends: 199 [2021-01-06 10:14:28,297 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 10:14:28,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:14:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 10:14:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 124. [2021-01-06 10:14:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 10:14:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 152 transitions. [2021-01-06 10:14:28,337 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 152 transitions. Word has length 54 [2021-01-06 10:14:28,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:28,337 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 152 transitions. [2021-01-06 10:14:28,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:14:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 152 transitions. [2021-01-06 10:14:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:14:28,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:28,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:28,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:14:28,553 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash 469790648, now seen corresponding path program 5 times [2021-01-06 10:14:28,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:28,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458877180] [2021-01-06 10:14:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:29,328 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-01-06 10:14:29,503 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-01-06 10:14:29,823 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-01-06 10:14:30,057 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-01-06 10:14:30,282 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-01-06 10:14:30,600 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-01-06 10:14:30,842 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-01-06 10:14:31,077 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-01-06 10:14:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:14:32,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458877180] [2021-01-06 10:14:32,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394247033] [2021-01-06 10:14:32,029 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:32,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 10:14:32,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 10:14:32,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:34,261 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-01-06 10:14:34,262 INFO L348 Elim1Store]: treesize reduction 77, result has 51.9 percent of original size [2021-01-06 10:14:34,263 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 100 [2021-01-06 10:14:34,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:34,268 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:34,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:34,270 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:34,277 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:14:34,376 INFO L625 ElimStorePlain]: treesize reduction 87, result has 29.3 percent of original size [2021-01-06 10:14:34,378 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:14:34,378 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:36 [2021-01-06 10:14:34,973 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2021-01-06 10:14:34,975 INFO L348 Elim1Store]: treesize reduction 160, result has 32.8 percent of original size [2021-01-06 10:14:34,975 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 95 [2021-01-06 10:14:34,979 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:34,980 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:34,985 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:14:35,073 INFO L625 ElimStorePlain]: treesize reduction 70, result has 34.0 percent of original size [2021-01-06 10:14:35,075 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:14:35,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:36 [2021-01-06 10:14:35,833 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-01-06 10:14:35,835 INFO L348 Elim1Store]: treesize reduction 12, result has 87.4 percent of original size [2021-01-06 10:14:35,835 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 101 [2021-01-06 10:14:35,845 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:35,845 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:35,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:14:36,046 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-01-06 10:14:36,047 INFO L625 ElimStorePlain]: treesize reduction 32, result has 67.3 percent of original size [2021-01-06 10:14:36,050 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:14:36,050 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:72 [2021-01-06 10:14:37,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:37,891 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:37,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:37,894 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:37,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 10:14:37,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:37,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:37,904 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 10:14:37,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:14:37,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:14:37,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:14:37,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:14:37,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:14:37,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:14:37,965 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 10 [2021-01-06 10:14:37,969 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:14:37,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-01-06 10:14:37,982 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:14:38,392 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-01-06 10:14:38,394 INFO L348 Elim1Store]: treesize reduction 29, result has 81.0 percent of original size [2021-01-06 10:14:38,395 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 136 [2021-01-06 10:14:38,399 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,405 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,416 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,419 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,419 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,422 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,423 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,428 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,428 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,430 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,432 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,433 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,442 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,443 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,443 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,448 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,449 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:14:38,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,460 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,461 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,465 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,467 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,475 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:14:38,475 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:14:38,480 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,484 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:14:38,493 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-01-06 10:14:38,613 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 9 [2021-01-06 10:14:38,615 INFO L625 ElimStorePlain]: treesize reduction 284, result has 3.4 percent of original size [2021-01-06 10:14:38,618 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:14:38,618 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:157, output treesize:3 [2021-01-06 10:14:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:14:38,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:38,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-01-06 10:14:38,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437925280] [2021-01-06 10:14:38,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 10:14:38,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:38,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 10:14:38,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:14:38,760 INFO L87 Difference]: Start difference. First operand 124 states and 152 transitions. Second operand 51 states. [2021-01-06 10:14:39,732 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-01-06 10:14:40,677 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-01-06 10:14:40,971 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-01-06 10:14:41,293 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-01-06 10:14:41,643 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-01-06 10:14:41,985 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-01-06 10:14:42,323 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-01-06 10:14:42,484 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-01-06 10:14:42,868 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-01-06 10:14:43,030 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-01-06 10:14:43,374 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-01-06 10:14:43,807 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-01-06 10:14:44,104 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-01-06 10:14:44,362 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-01-06 10:14:44,534 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-01-06 10:14:44,918 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-01-06 10:14:45,104 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-01-06 10:14:45,609 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-01-06 10:14:45,888 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-01-06 10:14:46,294 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-01-06 10:14:46,535 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-01-06 10:14:46,901 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-01-06 10:14:47,265 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-01-06 10:14:47,618 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-01-06 10:14:48,065 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-01-06 10:14:48,478 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-01-06 10:14:48,793 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-01-06 10:14:49,011 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-01-06 10:14:49,226 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-01-06 10:14:49,768 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-01-06 10:14:50,182 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-01-06 10:14:50,759 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 38 [2021-01-06 10:14:51,432 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-01-06 10:14:51,642 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-01-06 10:14:52,040 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-01-06 10:14:52,687 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-01-06 10:14:52,934 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-01-06 10:14:53,596 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 10:14:54,050 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-01-06 10:14:54,370 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-01-06 10:14:54,592 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-01-06 10:14:54,940 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-01-06 10:14:55,207 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-01-06 10:14:55,560 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-01-06 10:14:55,933 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-01-06 10:14:56,189 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-01-06 10:14:56,592 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-01-06 10:14:57,057 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-01-06 10:14:57,675 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-01-06 10:14:57,988 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-01-06 10:14:58,328 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-01-06 10:14:58,576 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-01-06 10:14:58,980 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-01-06 10:14:59,383 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2021-01-06 10:14:59,690 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-01-06 10:15:00,024 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-01-06 10:15:00,552 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-01-06 10:15:00,924 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-01-06 10:15:01,573 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-01-06 10:15:01,989 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-01-06 10:15:02,298 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-01-06 10:15:03,133 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-01-06 10:15:03,404 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-01-06 10:15:04,000 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-01-06 10:15:04,602 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-01-06 10:15:04,938 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-01-06 10:15:05,319 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-01-06 10:15:05,758 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-01-06 10:15:06,149 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-01-06 10:15:06,511 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-01-06 10:15:06,918 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-01-06 10:15:07,397 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-01-06 10:15:07,983 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-01-06 10:15:08,660 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-01-06 10:15:08,942 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-01-06 10:15:09,485 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-01-06 10:15:10,084 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-01-06 10:15:10,627 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-01-06 10:15:11,030 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-01-06 10:15:11,592 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 10:15:12,023 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-01-06 10:15:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:12,071 INFO L93 Difference]: Finished difference Result 546 states and 669 transitions. [2021-01-06 10:15:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-01-06 10:15:12,074 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 56 [2021-01-06 10:15:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:12,080 INFO L225 Difference]: With dead ends: 546 [2021-01-06 10:15:12,080 INFO L226 Difference]: Without dead ends: 537 [2021-01-06 10:15:12,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9629 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=2266, Invalid=26804, Unknown=0, NotChecked=0, Total=29070 [2021-01-06 10:15:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-01-06 10:15:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 292. [2021-01-06 10:15:12,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2021-01-06 10:15:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 363 transitions. [2021-01-06 10:15:12,135 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 363 transitions. Word has length 56 [2021-01-06 10:15:12,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:12,135 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 363 transitions. [2021-01-06 10:15:12,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 10:15:12,135 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 363 transitions. [2021-01-06 10:15:12,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:15:12,136 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:12,136 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:12,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:15:12,351 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash -339555978, now seen corresponding path program 2 times [2021-01-06 10:15:12,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:12,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635176814] [2021-01-06 10:15:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:13,708 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2021-01-06 10:15:14,121 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2021-01-06 10:15:14,725 WARN L197 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 37 [2021-01-06 10:15:15,210 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2021-01-06 10:15:15,804 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-01-06 10:15:16,256 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-01-06 10:15:16,661 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-01-06 10:15:17,113 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2021-01-06 10:15:17,542 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-01-06 10:15:17,900 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-01-06 10:15:18,258 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-01-06 10:15:18,769 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-01-06 10:15:19,192 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-01-06 10:15:19,578 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-01-06 10:15:19,920 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-01-06 10:15:20,254 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-01-06 10:15:20,586 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-01-06 10:15:20,963 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-01-06 10:15:21,323 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-01-06 10:15:21,705 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-01-06 10:15:22,096 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-01-06 10:15:22,549 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-01-06 10:15:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:15:23,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635176814] [2021-01-06 10:15:23,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746837618] [2021-01-06 10:15:23,101 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:23,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:23,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 90 conjunts are in the unsatisfiable core [2021-01-06 10:15:23,260 INFO L286 TraceCheckSpWp]: Computing forward predicates...