/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/sum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:26:17,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:26:17,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:26:17,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:26:17,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:26:17,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:26:17,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:26:17,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:26:17,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:26:17,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:26:17,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:26:17,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:26:17,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:26:17,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:26:17,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:26:17,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:26:17,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:26:17,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:26:17,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:26:17,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:26:17,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:26:17,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:26:17,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:26:17,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:26:17,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:26:17,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:26:17,280 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:26:17,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:26:17,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:26:17,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:26:17,283 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:26:17,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:26:17,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:26:17,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:26:17,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:26:17,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:26:17,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:26:17,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:26:17,284 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:26:17,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:26:17,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:26:17,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:26:17,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:26:17,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:26:17,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:26:17,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:26:17,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:26:17,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:26:17,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:26:17,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:26:17,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:26:17,288 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:26:17,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:26:17,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:26:17,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:26:17,775 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:26:17,775 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:26:17,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sum.i [2020-12-23 00:26:17,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5576c40a2/7a798a90800f4f6cace012c40146ab1b/FLAGdb21e0404 [2020-12-23 00:26:18,601 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:26:18,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum.i [2020-12-23 00:26:18,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5576c40a2/7a798a90800f4f6cace012c40146ab1b/FLAGdb21e0404 [2020-12-23 00:26:18,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5576c40a2/7a798a90800f4f6cace012c40146ab1b [2020-12-23 00:26:18,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:26:18,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:26:18,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:26:18,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:26:18,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:26:18,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:26:18" (1/1) ... [2020-12-23 00:26:18,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625c8b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:18, skipping insertion in model container [2020-12-23 00:26:18,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:26:18" (1/1) ... [2020-12-23 00:26:18,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:26:18,982 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,] [2020-12-23 00:26:19,150 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/sum.i[1282,1295] [2020-12-23 00:26:19,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:26:19,164 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,] [2020-12-23 00:26:19,191 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/sum.i[1282,1295] [2020-12-23 00:26:19,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:26:19,213 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:26:19,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19 WrapperNode [2020-12-23 00:26:19,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:26:19,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:26:19,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:26:19,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:26:19,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (1/1) ... [2020-12-23 00:26:19,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (1/1) ... [2020-12-23 00:26:19,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:26:19,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:26:19,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:26:19,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:26:19,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (1/1) ... [2020-12-23 00:26:19,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (1/1) ... [2020-12-23 00:26:19,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (1/1) ... [2020-12-23 00:26:19,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (1/1) ... [2020-12-23 00:26:19,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (1/1) ... [2020-12-23 00:26:19,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (1/1) ... [2020-12-23 00:26:19,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (1/1) ... [2020-12-23 00:26:19,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:26:19,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:26:19,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:26:19,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:26:19,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (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 [2020-12-23 00:26:19,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:26:19,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:26:19,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:26:19,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:26:19,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:26:19,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:26:19,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:26:20,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:26:20,129 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 00:26:20,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:26:20 BoogieIcfgContainer [2020-12-23 00:26:20,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:26:20,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:26:20,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:26:20,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:26:20,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:26:18" (1/3) ... [2020-12-23 00:26:20,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a74bf12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:26:20, skipping insertion in model container [2020-12-23 00:26:20,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:26:19" (2/3) ... [2020-12-23 00:26:20,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a74bf12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:26:20, skipping insertion in model container [2020-12-23 00:26:20,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:26:20" (3/3) ... [2020-12-23 00:26:20,141 INFO L111 eAbstractionObserver]: Analyzing ICFG sum.i [2020-12-23 00:26:20,149 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:26:20,155 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:26:20,177 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:26:20,205 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:26:20,205 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:26:20,206 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:26:20,206 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:26:20,206 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:26:20,206 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:26:20,206 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:26:20,206 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:26:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-23 00:26:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:26:20,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:20,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:20,229 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:20,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1309903528, now seen corresponding path program 1 times [2020-12-23 00:26:20,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:20,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402218275] [2020-12-23 00:26:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:26:20,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402218275] [2020-12-23 00:26:20,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:26:20,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:26:20,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302937047] [2020-12-23 00:26:20,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:26:20,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:20,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:26:20,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:26:20,469 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-12-23 00:26:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:20,489 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-12-23 00:26:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:26:20,491 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-12-23 00:26:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:20,501 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:26:20,501 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 00:26:20,504 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 [2020-12-23 00:26:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 00:26:20,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 00:26:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:26:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-23 00:26:20,543 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2020-12-23 00:26:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:20,543 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-23 00:26:20,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:26:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-23 00:26:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:26:20,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:20,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:20,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:26:20,545 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:20,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1075619486, now seen corresponding path program 1 times [2020-12-23 00:26:20,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:20,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243912508] [2020-12-23 00:26:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:26:20,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243912508] [2020-12-23 00:26:20,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:26:20,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:26:20,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159692707] [2020-12-23 00:26:20,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:26:20,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:20,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:26:20,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:26:20,655 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2020-12-23 00:26:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:20,716 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-23 00:26:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:26:20,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-23 00:26:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:20,718 INFO L225 Difference]: With dead ends: 39 [2020-12-23 00:26:20,718 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 00:26:20,719 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 [2020-12-23 00:26:20,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 00:26:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-23 00:26:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 00:26:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 00:26:20,725 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2020-12-23 00:26:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:20,725 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 00:26:20,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:26:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 00:26:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 00:26:20,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:20,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:20,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:26:20,729 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash -181903488, now seen corresponding path program 1 times [2020-12-23 00:26:20,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:20,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733821954] [2020-12-23 00:26:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:26:20,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733821954] [2020-12-23 00:26:20,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:26:20,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:26:20,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830584100] [2020-12-23 00:26:20,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:26:20,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:20,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:26:20,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:26:20,884 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-12-23 00:26:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:20,940 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-23 00:26:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:26:20,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-23 00:26:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:20,942 INFO L225 Difference]: With dead ends: 39 [2020-12-23 00:26:20,942 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 00:26:20,943 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 [2020-12-23 00:26:20,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 00:26:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-23 00:26:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:26:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-23 00:26:20,950 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2020-12-23 00:26:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:20,950 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-23 00:26:20,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:26:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-23 00:26:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:26:20,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:20,954 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] [2020-12-23 00:26:20,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:26:20,955 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:20,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1690360128, now seen corresponding path program 1 times [2020-12-23 00:26:20,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:20,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928997597] [2020-12-23 00:26:20,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:26:21,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928997597] [2020-12-23 00:26:21,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:26:21,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:26:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186403013] [2020-12-23 00:26:21,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:26:21,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:21,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:26:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:26:21,040 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-12-23 00:26:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:21,084 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-12-23 00:26:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:26:21,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-12-23 00:26:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:21,086 INFO L225 Difference]: With dead ends: 35 [2020-12-23 00:26:21,086 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:26:21,087 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 [2020-12-23 00:26:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:26:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-23 00:26:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 00:26:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 00:26:21,094 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2020-12-23 00:26:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:21,095 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 00:26:21,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:26:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 00:26:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 00:26:21,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:21,096 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] [2020-12-23 00:26:21,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:26:21,097 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash 806044638, now seen corresponding path program 1 times [2020-12-23 00:26:21,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:21,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845945456] [2020-12-23 00:26:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:26:21,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845945456] [2020-12-23 00:26:21,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058261407] [2020-12-23 00:26:21,234 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 [2020-12-23 00:26:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:26:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:26:21,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:21,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:26:21,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508442160] [2020-12-23 00:26:21,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:26:21,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:21,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:26:21,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:26:21,534 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-12-23 00:26:21,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:21,626 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-12-23 00:26:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:26:21,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-12-23 00:26:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:21,627 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:26:21,627 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:26:21,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:26:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:26:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 00:26:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:26:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 00:26:21,634 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2020-12-23 00:26:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:21,634 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 00:26:21,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:26:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 00:26:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:26:21,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:21,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:21,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:21,850 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1257196540, now seen corresponding path program 2 times [2020-12-23 00:26:21,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:21,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913750151] [2020-12-23 00:26:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:26:21,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913750151] [2020-12-23 00:26:21,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886098285] [2020-12-23 00:26:21,924 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 [2020-12-23 00:26:22,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:26:22,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:22,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:26:22,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:26:22,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:22,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-23 00:26:22,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204292290] [2020-12-23 00:26:22,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:26:22,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:22,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:26:22,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:26:22,065 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-12-23 00:26:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:26:22,139 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-12-23 00:26:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:26:22,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-23 00:26:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:26:22,140 INFO L225 Difference]: With dead ends: 48 [2020-12-23 00:26:22,140 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 00:26:22,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:26:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 00:26:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-12-23 00:26:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:26:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-23 00:26:22,148 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2020-12-23 00:26:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:26:22,148 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-23 00:26:22,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:26:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-23 00:26:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:26:22,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:26:22,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:26:22,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:26:22,363 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:26:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:26:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1118069564, now seen corresponding path program 3 times [2020-12-23 00:26:22,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:26:22,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930814992] [2020-12-23 00:26:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:26:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:26:24,104 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-12-23 00:26:24,351 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 59 [2020-12-23 00:26:24,635 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-23 00:26:24,913 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-12-23 00:26:25,122 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-12-23 00:26:25,508 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-12-23 00:26:25,718 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-12-23 00:26:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:26:26,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930814992] [2020-12-23 00:26:26,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39927134] [2020-12-23 00:26:26,940 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 [2020-12-23 00:26:27,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:26:27,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:26:27,200 WARN L261 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 00:26:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:26:27,803 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:27,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:26:27,878 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 33 [2020-12-23 00:26:27,881 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:26:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:26:27,892 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 31 [2020-12-23 00:26:27,895 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:26:28,016 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-12-23 00:26:28,017 INFO L625 ElimStorePlain]: treesize reduction 6, result has 94.8 percent of original size [2020-12-23 00:26:28,019 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:26:28,020 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:167, output treesize:109 [2020-12-23 00:26:28,430 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 8, 1] term [2020-12-23 00:26:28,431 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:28,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:29,094 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:29,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:29,429 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:26:29,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:26:29,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:26:29,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:26:30,164 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2020-12-23 00:26:30,615 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 8, 1] term [2020-12-23 00:26:30,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:30,680 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:26:30,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:26:30,684 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2020-12-23 00:26:30,686 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:26:30,795 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-23 00:26:30,797 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:26:30,806 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:26:30,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:26:30,810 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2020-12-23 00:26:30,813 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:26:30,896 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:26:30,931 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2020-12-23 00:26:30,932 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:207, output treesize:167 [2020-12-23 00:26:31,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:31,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:26:31,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:26:31,479 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:26:31,480 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 50 treesize of output 32 [2020-12-23 00:26:31,482 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:26:31,586 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-12-23 00:26:31,587 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:26:31,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:26:31,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:26:31,599 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:26:31,601 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 51 treesize of output 33 [2020-12-23 00:26:31,603 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:26:31,691 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:26:31,705 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2020-12-23 00:26:31,706 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:197, output treesize:147 [2020-12-23 00:26:32,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:32,429 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:26:32,430 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 2 case distinctions, treesize of input 76 treesize of output 54 [2020-12-23 00:26:32,450 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:32,458 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:26:32,478 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:26:32,479 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 73 treesize of output 51 [2020-12-23 00:26:32,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:32,494 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:26:32,740 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-12-23 00:26:32,741 INFO L625 ElimStorePlain]: treesize reduction 40, result has 79.1 percent of original size [2020-12-23 00:26:32,745 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:26:32,745 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:178, output treesize:151 [2020-12-23 00:26:33,056 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 00:26:33,074 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:33,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:26:33,077 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:26:33,080 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:26:33,081 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:26:33,086 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:26:33,450 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 7, 3, 2, 1] term [2020-12-23 00:26:33,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:33,452 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 00:26:33,455 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 00:26:33,652 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:26:34,054 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-23 00:26:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:26:34,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:26:34,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2020-12-23 00:26:34,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288677629] [2020-12-23 00:26:34,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 00:26:34,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:26:34,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 00:26:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:26:34,463 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 44 states. [2020-12-23 00:26:35,852 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2020-12-23 00:26:36,197 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 38 [2020-12-23 00:26:36,499 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-23 00:26:36,823 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-12-23 00:26:37,639 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-12-23 00:26:44,267 WARN L197 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 197 DAG size of output: 124 [2020-12-23 00:26:52,239 WARN L197 SmtUtils]: Spent 3.80 s on a formula simplification. DAG size of input: 200 DAG size of output: 113 [2020-12-23 00:27:02,456 WARN L197 SmtUtils]: Spent 9.73 s on a formula simplification. DAG size of input: 147 DAG size of output: 109 [2020-12-23 00:27:03,967 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 79 [2020-12-23 00:27:04,929 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 60 [2020-12-23 00:27:05,695 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 65 [2020-12-23 00:27:06,660 WARN L197 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 67 [2020-12-23 00:27:07,933 WARN L197 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 74 [2020-12-23 00:27:12,885 WARN L197 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 195 DAG size of output: 75 [2020-12-23 00:27:32,857 WARN L197 SmtUtils]: Spent 19.20 s on a formula simplification. DAG size of input: 206 DAG size of output: 133 [2020-12-23 00:27:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:33,095 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-12-23 00:27:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:27:33,097 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 30 [2020-12-23 00:27:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:33,099 INFO L225 Difference]: With dead ends: 64 [2020-12-23 00:27:33,099 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 00:27:33,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 56.6s TimeCoverageRelationStatistics Valid=369, Invalid=3413, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 00:27:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 00:27:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-12-23 00:27:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:27:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-12-23 00:27:33,113 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 30 [2020-12-23 00:27:33,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:33,114 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-12-23 00:27:33,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 00:27:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-12-23 00:27:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:27:33,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:33,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:33,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:33,316 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:33,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1920835302, now seen corresponding path program 4 times [2020-12-23 00:27:33,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:33,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820616913] [2020-12-23 00:27:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:27:33,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820616913] [2020-12-23 00:27:33,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427087972] [2020-12-23 00:27:33,462 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 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 [2020-12-23 00:27:33,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:27:33,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:33,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:27:33,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:27:33,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:33,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 00:27:33,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502123404] [2020-12-23 00:27:33,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:27:33,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:33,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:27:33,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:27:33,722 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 13 states. [2020-12-23 00:27:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:34,128 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2020-12-23 00:27:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:27:34,130 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-12-23 00:27:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:34,131 INFO L225 Difference]: With dead ends: 97 [2020-12-23 00:27:34,131 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 00:27:34,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:27:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 00:27:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-12-23 00:27:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:27:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 00:27:34,141 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 32 [2020-12-23 00:27:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:34,142 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 00:27:34,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:27:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 00:27:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:27:34,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:34,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:34,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:34,357 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:34,358 INFO L82 PathProgramCache]: Analyzing trace with hash 123559130, now seen corresponding path program 5 times [2020-12-23 00:27:34,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:34,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000036497] [2020-12-23 00:27:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:27:34,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000036497] [2020-12-23 00:27:34,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225271691] [2020-12-23 00:27:34,500 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 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 [2020-12-23 00:27:34,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 00:27:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:27:34,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:27:34,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:34,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 00:27:34,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118319776] [2020-12-23 00:27:34,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:27:34,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:34,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:27:34,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:27:34,763 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 13 states. [2020-12-23 00:27:35,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:35,163 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-12-23 00:27:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:27:35,164 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-12-23 00:27:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:35,165 INFO L225 Difference]: With dead ends: 55 [2020-12-23 00:27:35,165 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 00:27:35,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:27:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 00:27:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-12-23 00:27:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 00:27:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-23 00:27:35,173 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2020-12-23 00:27:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:35,173 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-23 00:27:35,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:27:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-23 00:27:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 00:27:35,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:35,174 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:35,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:35,384 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash -355458022, now seen corresponding path program 6 times [2020-12-23 00:27:35,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:35,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350853632] [2020-12-23 00:27:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 00:27:35,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350853632] [2020-12-23 00:27:35,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992928193] [2020-12-23 00:27:35,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 00:27:35,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 00:27:35,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:27:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:27:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 00:27:35,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:27:35,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-23 00:27:35,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726054510] [2020-12-23 00:27:35,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:27:35,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:27:35,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:27:35,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:27:35,840 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 11 states. [2020-12-23 00:27:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:27:36,263 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-12-23 00:27:36,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:27:36,264 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-23 00:27:36,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:27:36,265 INFO L225 Difference]: With dead ends: 53 [2020-12-23 00:27:36,265 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 00:27:36,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:27:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 00:27:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-23 00:27:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 00:27:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-23 00:27:36,273 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2020-12-23 00:27:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:27:36,273 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-23 00:27:36,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:27:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-23 00:27:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:27:36,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:27:36,274 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:27:36,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:27:36,489 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:27:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:27:36,490 INFO L82 PathProgramCache]: Analyzing trace with hash -790613320, now seen corresponding path program 7 times [2020-12-23 00:27:36,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:27:36,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360087299] [2020-12-23 00:27:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:27:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:37,744 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2020-12-23 00:27:37,889 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2020-12-23 00:27:38,075 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-12-23 00:27:38,242 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-12-23 00:27:38,411 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-12-23 00:27:38,788 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-12-23 00:27:39,185 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 57 [2020-12-23 00:27:39,785 WARN L197 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2020-12-23 00:27:40,272 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-12-23 00:27:40,778 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-12-23 00:27:41,287 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-12-23 00:27:41,636 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-12-23 00:27:42,004 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-12-23 00:27:42,325 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-12-23 00:27:42,893 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-12-23 00:27:43,234 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-23 00:27:43,621 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-23 00:27:44,002 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-23 00:27:46,334 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-23 00:27:46,583 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-23 00:27:46,963 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-12-23 00:27:47,298 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-12-23 00:27:49,225 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-12-23 00:27:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:27:49,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360087299] [2020-12-23 00:27:49,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683133856] [2020-12-23 00:27:49,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 00:27:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:27:49,858 WARN L261 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 98 conjunts are in the unsatisfiable core [2020-12-23 00:27:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:27:50,759 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:27:51,447 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-23 00:27:51,460 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:27:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:51,497 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 49 [2020-12-23 00:27:51,500 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:27:51,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:51,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:51,522 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 51 [2020-12-23 00:27:51,524 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:27:51,721 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-23 00:27:51,723 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:27:51,725 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:27:51,726 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:277, output treesize:225 [2020-12-23 00:27:52,352 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-23 00:27:53,268 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-12-23 00:27:53,889 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-12-23 00:27:55,045 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-23 00:27:55,834 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-23 00:27:56,427 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-23 00:27:56,447 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 8, 1] term [2020-12-23 00:27:56,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:27:57,221 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-23 00:27:57,228 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:27:57,245 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:27:57,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:57,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:57,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:57,272 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:27:57,273 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:27:57,286 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 71 [2020-12-23 00:27:57,293 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:27:57,306 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:27:57,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:57,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:57,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:27:57,320 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 68 [2020-12-23 00:27:57,323 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:27:57,516 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-23 00:27:57,517 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:27:57,519 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:27:57,520 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:300, output treesize:282 [2020-12-23 00:27:58,018 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-23 00:27:58,558 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-23 00:27:58,567 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 8, 1] term [2020-12-23 00:27:58,568 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:27:58,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:58,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:58,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:58,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:27:58,600 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 61 [2020-12-23 00:27:58,603 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:27:58,808 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 00:27:58,809 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:27:58,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:58,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:58,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:58,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:58,833 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:27:58,835 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 64 [2020-12-23 00:27:58,841 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:27:58,991 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-23 00:27:58,992 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:27:58,994 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:27:58,995 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:272, output treesize:212 [2020-12-23 00:27:59,559 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-23 00:27:59,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:27:59,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:59,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:59,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:27:59,646 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2020-12-23 00:27:59,651 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:28:00,044 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2020-12-23 00:28:00,046 INFO L625 ElimStorePlain]: treesize reduction 41, result has 82.5 percent of original size [2020-12-23 00:28:00,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:28:00,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:28:00,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:28:00,074 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 49 [2020-12-23 00:28:00,076 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:28:00,241 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-23 00:28:00,241 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:28:00,248 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:28:00,248 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:265, output treesize:153 [2020-12-23 00:28:02,152 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-23 00:28:02,638 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 00:28:02,646 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:28:02,677 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 36 [2020-12-23 00:28:02,680 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:28:02,690 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:28:02,691 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 39 [2020-12-23 00:28:02,694 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:28:02,763 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:28:02,765 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:28:02,765 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:212, output treesize:58 [2020-12-23 00:28:03,055 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:28:03,792 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-23 00:28:04,477 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-12-23 00:28:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:28:04,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:04,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30] total 55 [2020-12-23 00:28:04,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230944936] [2020-12-23 00:28:04,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 00:28:04,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:04,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 00:28:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2747, Unknown=1, NotChecked=0, Total=2970 [2020-12-23 00:28:04,524 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 55 states. [2020-12-23 00:28:05,061 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 22 [2020-12-23 00:28:05,441 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 28 [2020-12-23 00:28:06,069 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 32 [2020-12-23 00:28:07,206 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-12-23 00:28:07,629 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-23 00:28:09,805 WARN L197 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 68 [2020-12-23 00:28:10,896 WARN L197 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 67 [2020-12-23 00:28:12,289 WARN L197 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 71 [2020-12-23 00:28:14,032 WARN L197 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 156 DAG size of output: 86 [2020-12-23 00:28:15,670 WARN L197 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-12-23 00:28:17,338 WARN L197 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-12-23 00:28:19,345 WARN L197 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 163 DAG size of output: 80 [2020-12-23 00:28:20,847 WARN L197 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 84 [2020-12-23 00:28:23,071 WARN L197 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2020-12-23 00:28:25,178 WARN L197 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2020-12-23 00:28:27,190 WARN L197 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 87 [2020-12-23 00:28:29,147 WARN L197 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 137 DAG size of output: 92 [2020-12-23 00:28:30,877 WARN L197 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 75 [2020-12-23 00:28:32,555 WARN L197 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2020-12-23 00:28:34,371 WARN L197 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 83 [2020-12-23 00:28:36,197 WARN L197 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-12-23 00:28:38,775 WARN L197 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 171 DAG size of output: 93 [2020-12-23 00:28:41,709 WARN L197 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 182 DAG size of output: 101 [2020-12-23 00:28:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:41,959 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-12-23 00:28:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:28:41,962 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 38 [2020-12-23 00:28:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:41,964 INFO L225 Difference]: With dead ends: 79 [2020-12-23 00:28:41,965 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 00:28:41,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=583, Invalid=5736, Unknown=1, NotChecked=0, Total=6320 [2020-12-23 00:28:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 00:28:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-12-23 00:28:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 00:28:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-12-23 00:28:41,985 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 38 [2020-12-23 00:28:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:41,988 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-12-23 00:28:41,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 00:28:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-12-23 00:28:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 00:28:41,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:41,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:42,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:42,191 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:42,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:42,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2080915862, now seen corresponding path program 8 times [2020-12-23 00:28:42,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:42,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966415292] [2020-12-23 00:28:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:28:42,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966415292] [2020-12-23 00:28:42,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734432482] [2020-12-23 00:28:42,433 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 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 [2020-12-23 00:28:42,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:28:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:42,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:28:42,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:28:42,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:42,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 00:28:42,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847979604] [2020-12-23 00:28:42,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:28:42,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:42,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:28:42,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:28:42,878 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 16 states. [2020-12-23 00:28:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:43,512 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2020-12-23 00:28:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:28:43,514 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-12-23 00:28:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:43,515 INFO L225 Difference]: With dead ends: 119 [2020-12-23 00:28:43,515 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:28:43,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:28:43,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:28:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2020-12-23 00:28:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 00:28:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-12-23 00:28:43,536 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 40 [2020-12-23 00:28:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:43,536 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-12-23 00:28:43,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:28:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-12-23 00:28:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 00:28:43,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:43,537 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:43,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 00:28:43,753 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:43,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1875684950, now seen corresponding path program 9 times [2020-12-23 00:28:43,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:43,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643116565] [2020-12-23 00:28:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:28:44,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643116565] [2020-12-23 00:28:44,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958516790] [2020-12-23 00:28:44,003 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 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 [2020-12-23 00:28:44,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:28:44,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:28:44,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:28:44,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:28:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 00:28:44,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:28:44,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2020-12-23 00:28:44,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649241855] [2020-12-23 00:28:44,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:28:44,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:28:44,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:28:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:28:44,686 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 15 states. [2020-12-23 00:28:45,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:28:45,811 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2020-12-23 00:28:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:28:45,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-12-23 00:28:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:28:45,814 INFO L225 Difference]: With dead ends: 76 [2020-12-23 00:28:45,814 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 00:28:45,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:28:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 00:28:45,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-23 00:28:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 00:28:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-12-23 00:28:45,825 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2020-12-23 00:28:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:28:45,826 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-12-23 00:28:45,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:28:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-12-23 00:28:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:28:45,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:28:45,827 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:28:46,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:28:46,042 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:28:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:28:46,043 INFO L82 PathProgramCache]: Analyzing trace with hash -173058764, now seen corresponding path program 10 times [2020-12-23 00:28:46,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:28:46,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073161366] [2020-12-23 00:28:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:28:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:28:47,656 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-12-23 00:28:47,824 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-12-23 00:28:48,042 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2020-12-23 00:28:48,254 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-12-23 00:28:48,519 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-12-23 00:28:48,716 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-23 00:28:48,912 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-23 00:28:49,083 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2020-12-23 00:28:49,640 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 34 [2020-12-23 00:28:50,404 WARN L197 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 45 [2020-12-23 00:28:51,205 WARN L197 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 74 [2020-12-23 00:28:52,067 WARN L197 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 79 [2020-12-23 00:28:53,054 WARN L197 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 79 [2020-12-23 00:28:53,910 WARN L197 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 85 [2020-12-23 00:28:54,885 WARN L197 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 85 [2020-12-23 00:28:55,735 WARN L197 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 85 [2020-12-23 00:28:56,436 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2020-12-23 00:28:57,087 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2020-12-23 00:28:57,746 WARN L197 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2020-12-23 00:28:58,440 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-12-23 00:28:58,980 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 44 [2020-12-23 00:28:59,674 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 42 [2020-12-23 00:29:00,560 WARN L197 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2020-12-23 00:29:01,097 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2020-12-23 00:29:01,718 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-12-23 00:29:02,232 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-12-23 00:29:02,671 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-12-23 00:29:03,120 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2020-12-23 00:29:03,694 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2020-12-23 00:29:04,135 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2020-12-23 00:29:04,602 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-12-23 00:29:05,173 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2020-12-23 00:29:05,805 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-12-23 00:29:06,340 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2020-12-23 00:29:06,896 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2020-12-23 00:29:07,379 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2020-12-23 00:29:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:29:07,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073161366] [2020-12-23 00:29:07,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391541613] [2020-12-23 00:29:07,876 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 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 [2020-12-23 00:29:08,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:29:08,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:29:08,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 119 conjunts are in the unsatisfiable core [2020-12-23 00:29:08,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:29:10,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:29:11,725 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-23 00:29:11,738 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:29:11,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,807 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 64 [2020-12-23 00:29:11,811 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:29:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:11,848 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 62 [2020-12-23 00:29:11,853 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:29:12,372 WARN L197 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-12-23 00:29:12,374 INFO L625 ElimStorePlain]: treesize reduction 34, result has 85.7 percent of original size [2020-12-23 00:29:12,376 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:29:12,377 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:289, output treesize:203 [2020-12-23 00:29:12,974 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-23 00:29:13,905 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-23 00:29:14,616 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-23 00:29:15,726 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-23 00:29:16,618 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-23 00:29:17,723 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-23 00:29:18,782 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-23 00:29:19,631 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-23 00:29:19,652 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 7, 1] term [2020-12-23 00:29:19,653 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:29:20,659 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 00:29:21,955 WARN L197 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-23 00:29:21,967 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:29:21,968 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:29:21,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:29:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,033 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:22,034 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:22,074 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 90 [2020-12-23 00:29:22,079 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:29:22,096 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:22,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,134 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:22,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,141 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:22,197 INFO L244 Elim1Store]: Index analysis took 102 ms [2020-12-23 00:29:22,199 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 92 [2020-12-23 00:29:22,204 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:29:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:22,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,250 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:22,252 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:22,286 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 92 [2020-12-23 00:29:22,292 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 00:29:22,307 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:22,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,336 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:22,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:22,346 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 94 [2020-12-23 00:29:22,352 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-23 00:29:22,961 WARN L197 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-12-23 00:29:22,963 INFO L625 ElimStorePlain]: treesize reduction 401, result has 41.1 percent of original size [2020-12-23 00:29:22,966 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:29:22,966 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:745, output treesize:280 [2020-12-23 00:29:23,744 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-23 00:29:24,493 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-23 00:29:24,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:29:24,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,527 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:24,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,551 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:24,566 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 84 [2020-12-23 00:29:24,570 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:29:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,587 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:24,603 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 88 [2020-12-23 00:29:24,608 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:29:24,831 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-23 00:29:24,833 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:29:24,835 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:29:24,835 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:328, output treesize:298 [2020-12-23 00:29:25,692 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-23 00:29:26,518 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-23 00:29:26,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:29:26,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,559 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:26,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,586 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:26,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 87 [2020-12-23 00:29:26,604 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:29:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,628 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:29:26,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:29:26,642 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 91 [2020-12-23 00:29:26,647 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:29:27,165 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-12-23 00:29:27,167 INFO L625 ElimStorePlain]: treesize reduction 6, result has 98.2 percent of original size [2020-12-23 00:29:27,170 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:29:27,170 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:356, output treesize:320 [2020-12-23 00:29:28,085 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-23 00:29:28,095 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 9, 1] term [2020-12-23 00:29:28,096 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:29:29,003 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 00:29:29,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:29:29,901 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 00:29:29,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:29:29,919 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-23 00:29:29,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:29:29,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-12-23 00:29:29,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086041424] [2020-12-23 00:29:29,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:29:29,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:29:29,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:29:29,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=4225, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 00:29:29,922 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 42 states. [2020-12-23 00:29:30,607 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 21 [2020-12-23 00:29:31,096 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 27 [2020-12-23 00:29:31,677 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-23 00:29:32,346 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-23 00:29:33,113 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-23 00:29:33,679 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-23 00:29:34,710 WARN L197 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2020-12-23 00:29:35,519 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-23 00:29:36,840 WARN L197 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2020-12-23 00:29:37,774 WARN L197 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-12-23 00:29:38,554 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-23 00:29:39,463 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2020-12-23 00:29:40,574 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2020-12-23 00:29:41,521 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 51 [2020-12-23 00:29:44,869 WARN L197 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 107 DAG size of output: 55 [2020-12-23 00:29:46,177 WARN L197 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 55 [2020-12-23 00:29:47,758 WARN L197 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 68 [2020-12-23 00:29:49,369 WARN L197 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2020-12-23 00:29:51,118 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2020-12-23 00:29:55,149 WARN L197 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 162 DAG size of output: 74 [2020-12-23 00:29:57,226 WARN L197 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 120 DAG size of output: 78 [2020-12-23 00:30:00,379 WARN L197 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 142 DAG size of output: 102 [2020-12-23 00:30:01,419 WARN L197 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-12-23 00:30:02,393 WARN L197 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 74 [2020-12-23 00:30:03,353 WARN L197 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-12-23 00:30:04,226 WARN L197 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-12-23 00:30:04,921 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-23 00:30:05,782 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-12-23 00:30:07,102 WARN L197 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 64 [2020-12-23 00:30:08,565 WARN L197 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 65 [2020-12-23 00:30:10,112 WARN L197 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 64 [2020-12-23 00:30:11,235 WARN L197 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 65 [2020-12-23 00:30:12,665 WARN L197 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 85 [2020-12-23 00:30:14,497 WARN L197 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 77 [2020-12-23 00:30:16,059 WARN L197 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 89 [2020-12-23 00:30:18,310 WARN L197 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 142 DAG size of output: 86 [2020-12-23 00:30:21,486 WARN L197 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 195 DAG size of output: 83 [2020-12-23 00:30:23,962 WARN L197 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 148 DAG size of output: 88 [2020-12-23 00:30:26,592 WARN L197 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 150 DAG size of output: 90 [2020-12-23 00:30:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:26,803 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-12-23 00:30:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 00:30:26,808 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-12-23 00:30:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:26,809 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:30:26,809 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 00:30:26,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 86.3s TimeCoverageRelationStatistics Valid=999, Invalid=10343, Unknown=0, NotChecked=0, Total=11342 [2020-12-23 00:30:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 00:30:26,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-23 00:30:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:30:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-23 00:30:26,825 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 46 [2020-12-23 00:30:26,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:26,825 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-23 00:30:26,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:30:26,825 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-23 00:30:26,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:30:26,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:26,826 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:27,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:30:27,033 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:27,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1413772626, now seen corresponding path program 11 times [2020-12-23 00:30:27,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:27,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183624129] [2020-12-23 00:30:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 00:30:27,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183624129] [2020-12-23 00:30:27,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99437626] [2020-12-23 00:30:27,387 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 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 [2020-12-23 00:30:27,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:30:27,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:30:27,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 00:30:28,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:28,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2020-12-23 00:30:28,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095560898] [2020-12-23 00:30:28,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:30:28,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:28,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:30:28,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:30:28,061 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 17 states. [2020-12-23 00:30:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:29,500 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-12-23 00:30:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:30:29,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-12-23 00:30:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:29,505 INFO L225 Difference]: With dead ends: 100 [2020-12-23 00:30:29,505 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 00:30:29,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:30:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 00:30:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-12-23 00:30:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 00:30:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-12-23 00:30:29,518 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 48 [2020-12-23 00:30:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:29,518 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-12-23 00:30:29,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:30:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-12-23 00:30:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 00:30:29,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:29,519 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:29,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:30:29,737 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:29,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash 266992210, now seen corresponding path program 12 times [2020-12-23 00:30:29,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:29,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55116459] [2020-12-23 00:30:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-23 00:30:30,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55116459] [2020-12-23 00:30:30,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672913316] [2020-12-23 00:30:30,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 00:30:30,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 00:30:30,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:30:30,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:30:30,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:30:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-23 00:30:31,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:30:31,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-12-23 00:30:31,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233801255] [2020-12-23 00:30:31,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:30:31,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:30:31,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:30:31,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:30:31,690 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 22 states. [2020-12-23 00:30:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:30:33,916 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-12-23 00:30:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:30:33,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-12-23 00:30:33,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:30:33,921 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:30:33,922 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 00:30:33,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=361, Invalid=1361, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:30:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 00:30:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-12-23 00:30:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 00:30:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-12-23 00:30:33,934 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 52 [2020-12-23 00:30:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:30:33,934 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-12-23 00:30:33,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:30:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-12-23 00:30:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:30:33,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:30:33,935 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:30:34,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:30:34,149 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:30:34,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:30:34,150 INFO L82 PathProgramCache]: Analyzing trace with hash 532581040, now seen corresponding path program 13 times [2020-12-23 00:30:34,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:30:34,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298929377] [2020-12-23 00:30:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:30:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:30:35,792 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2020-12-23 00:30:36,056 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2020-12-23 00:30:36,310 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29