/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/ldv-regression/test27-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:18:10,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:18:10,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:18:10,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:18:10,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:18:10,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:18:10,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:18:10,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:18:10,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:18:10,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:18:10,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:18:10,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:18:10,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:18:10,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:18:10,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:18:10,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:18:10,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:18:10,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:18:10,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:18:10,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:18:10,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:18:10,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:18:10,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:18:10,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:18:10,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:18:10,493 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 06:18:10,543 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:18:10,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:18:10,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:18:10,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:18:10,549 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:18:10,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:18:10,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:18:10,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:18:10,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:18:10,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:18:10,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:18:10,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:18:10,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:18:10,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:18:10,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:18:10,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:18:10,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:18:10,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:18:10,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:18:10,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:18:10,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:18:10,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:18:10,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:18:10,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:18:10,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:18:10,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:18:11,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:18:11,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:18:11,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:18:11,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:18:11,077 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:18:11,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test27-2.c [2020-12-23 06:18:11,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a99bea3e3/e74d072a8a874c6e858f21b7321e4bf1/FLAG9ea1ec01b [2020-12-23 06:18:11,899 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:18:11,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test27-2.c [2020-12-23 06:18:11,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a99bea3e3/e74d072a8a874c6e858f21b7321e4bf1/FLAG9ea1ec01b [2020-12-23 06:18:12,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a99bea3e3/e74d072a8a874c6e858f21b7321e4bf1 [2020-12-23 06:18:12,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:18:12,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:18:12,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:18:12,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:18:12,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:18:12,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42264316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12, skipping insertion in model container [2020-12-23 06:18:12,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:18:12,260 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~dummies~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~dummy~0,],array] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~dummies~0,],[BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~cont~0,],array] left hand side expression in assignment: lhs: VariableLHS[~pa~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:18:12,452 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/ldv-regression/test27-2.c[1224,1237] [2020-12-23 06:18:12,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:18:12,466 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#dummies~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#dummies~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#dummy~0,],base],StructAccessExpression[IdentifierExpression[~#dummy~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#dummies~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#dummies~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#cont~0,],base],StructAccessExpression[IdentifierExpression[~#cont~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~pa~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:18:12,492 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/ldv-regression/test27-2.c[1224,1237] [2020-12-23 06:18:12,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:18:12,513 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:18:12,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12 WrapperNode [2020-12-23 06:18:12,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:18:12,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:18:12,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:18:12,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:18:12,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:18:12,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:18:12,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:18:12,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:18:12,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (1/1) ... [2020-12-23 06:18:12,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:18:12,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:18:12,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:18:12,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:18:12,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (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 06:18:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 06:18:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:18:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 06:18:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:18:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:18:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:18:12,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:18:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:18:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:18:13,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:18:13,147 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 06:18:13,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:13 BoogieIcfgContainer [2020-12-23 06:18:13,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:18:13,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:18:13,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:18:13,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:18:13,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:18:12" (1/3) ... [2020-12-23 06:18:13,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73431bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:18:13, skipping insertion in model container [2020-12-23 06:18:13,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:12" (2/3) ... [2020-12-23 06:18:13,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73431bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:18:13, skipping insertion in model container [2020-12-23 06:18:13,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:13" (3/3) ... [2020-12-23 06:18:13,160 INFO L111 eAbstractionObserver]: Analyzing ICFG test27-2.c [2020-12-23 06:18:13,169 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:18:13,175 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:18:13,197 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:18:13,226 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:18:13,227 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:18:13,227 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:18:13,227 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:18:13,227 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:18:13,227 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:18:13,227 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:18:13,227 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:18:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 06:18:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:18:13,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:13,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:13,272 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:13,282 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-12-23 06:18:13,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:13,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883603901] [2020-12-23 06:18:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:13,653 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 06:18:13,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883603901] [2020-12-23 06:18:13,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:13,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:18:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664279826] [2020-12-23 06:18:13,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:18:13,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:13,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:18:13,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:18:13,692 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-23 06:18:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:13,717 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2020-12-23 06:18:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:18:13,719 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 06:18:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:13,746 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:18:13,747 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 06:18:13,754 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 06:18:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 06:18:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 06:18:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:18:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-23 06:18:13,798 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-12-23 06:18:13,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:13,800 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-23 06:18:13,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:18:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-23 06:18:13,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:18:13,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:13,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:13,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:18:13,804 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-12-23 06:18:13,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:13,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440461155] [2020-12-23 06:18:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:13,957 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 06:18:13,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440461155] [2020-12-23 06:18:13,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:13,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:18:13,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495278897] [2020-12-23 06:18:13,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:18:13,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:13,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:18:13,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:18:13,964 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-12-23 06:18:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:14,021 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 06:18:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:18:14,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-23 06:18:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:14,023 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:18:14,023 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:18:14,024 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 06:18:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:18:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-23 06:18:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:18:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-23 06:18:14,029 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-23 06:18:14,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:14,029 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-23 06:18:14,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:18:14,030 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-23 06:18:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:18:14,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:14,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:14,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:18:14,031 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:14,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:14,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2020-12-23 06:18:14,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:14,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594283530] [2020-12-23 06:18:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:14,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594283530] [2020-12-23 06:18:14,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423841893] [2020-12-23 06:18:14,095 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 06:18:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:14,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:18:14,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:14,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:14,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:18:14,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818884663] [2020-12-23 06:18:14,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:18:14,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:14,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:18:14,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:18:14,378 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-12-23 06:18:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:14,410 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-23 06:18:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:18:14,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 06:18:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:14,412 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:18:14,412 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:18:14,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:18:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:18:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-23 06:18:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 06:18:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 06:18:14,418 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-12-23 06:18:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:14,419 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 06:18:14,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:18:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 06:18:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:18:14,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:14,420 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:14,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:18:14,635 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:14,636 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2020-12-23 06:18:14,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:14,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329850885] [2020-12-23 06:18:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:14,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329850885] [2020-12-23 06:18:14,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691413464] [2020-12-23 06:18:14,768 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 06:18:14,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:18:14,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:14,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:18:14,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:14,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:14,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:18:14,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918468867] [2020-12-23 06:18:14,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:18:14,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:14,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:18:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:18:14,996 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-23 06:18:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:15,051 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-23 06:18:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:18:15,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 06:18:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:15,064 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:18:15,064 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:18:15,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:18:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:18:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-23 06:18:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:18:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 06:18:15,076 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-12-23 06:18:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:15,076 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 06:18:15,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:18:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 06:18:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:18:15,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:15,078 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:15,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:15,295 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:15,297 INFO L82 PathProgramCache]: Analyzing trace with hash 123871506, now seen corresponding path program 3 times [2020-12-23 06:18:15,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:15,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611899088] [2020-12-23 06:18:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:15,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611899088] [2020-12-23 06:18:15,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513376946] [2020-12-23 06:18:15,438 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 06:18:15,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:18:15,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:15,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:18:15,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:15,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:15,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:18:15,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924950197] [2020-12-23 06:18:15,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:18:15,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:15,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:18:15,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:18:15,686 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-12-23 06:18:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:15,719 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-23 06:18:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:18:15,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-23 06:18:15,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:15,721 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:18:15,721 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:18:15,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:18:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:18:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-23 06:18:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 06:18:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 06:18:15,726 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-12-23 06:18:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:15,727 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 06:18:15,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:18:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 06:18:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:18:15,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:15,728 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:15,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:15,942 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:15,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1444204464, now seen corresponding path program 4 times [2020-12-23 06:18:15,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:15,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688803787] [2020-12-23 06:18:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:16,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688803787] [2020-12-23 06:18:16,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351266545] [2020-12-23 06:18:16,066 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 06:18:16,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:18:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:16,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:18:16,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:16,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:16,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:18:16,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778574451] [2020-12-23 06:18:16,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:18:16,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:16,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:18:16,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:18:16,216 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-12-23 06:18:16,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:16,255 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-23 06:18:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:18:16,256 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-23 06:18:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:16,257 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:18:16,257 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:18:16,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:18:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:18:16,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-23 06:18:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:18:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 06:18:16,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-12-23 06:18:16,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:16,263 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 06:18:16,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:18:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 06:18:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 06:18:16,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:16,264 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:16,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:16,478 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:16,478 INFO L82 PathProgramCache]: Analyzing trace with hash -831690738, now seen corresponding path program 5 times [2020-12-23 06:18:16,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:16,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122602030] [2020-12-23 06:18:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:16,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122602030] [2020-12-23 06:18:16,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615599417] [2020-12-23 06:18:16,625 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 06:18:17,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:18:17,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:17,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:18:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:17,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:17,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:18:17,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130021891] [2020-12-23 06:18:17,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:18:17,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:17,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:18:17,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:18:17,221 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-12-23 06:18:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:17,265 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-23 06:18:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:18:17,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-23 06:18:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:17,267 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:18:17,267 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 06:18:17,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:18:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 06:18:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-23 06:18:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:18:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 06:18:17,273 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-12-23 06:18:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:17,273 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 06:18:17,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:18:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 06:18:17,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:18:17,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:17,275 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:17,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:18:17,490 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 6 times [2020-12-23 06:18:17,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:17,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626312033] [2020-12-23 06:18:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:17,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626312033] [2020-12-23 06:18:17,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464948237] [2020-12-23 06:18:17,647 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 06:18:19,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:18:19,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:18:19,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:19,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:19,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:18:19,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618218903] [2020-12-23 06:18:19,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:18:19,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:18:19,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:18:19,882 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-23 06:18:19,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:19,932 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-23 06:18:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:18:19,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-23 06:18:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:19,934 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:18:19,934 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 06:18:19,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:18:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 06:18:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-23 06:18:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:18:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-23 06:18:19,939 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-12-23 06:18:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:19,939 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-23 06:18:19,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:18:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-23 06:18:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:18:19,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:19,940 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:20,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:20,154 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:20,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:20,155 INFO L82 PathProgramCache]: Analyzing trace with hash 4509962, now seen corresponding path program 7 times [2020-12-23 06:18:20,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:20,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124330425] [2020-12-23 06:18:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:20,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124330425] [2020-12-23 06:18:20,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126070395] [2020-12-23 06:18:20,270 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 06:18:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:20,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:18:20,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:20,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:20,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:18:20,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479115057] [2020-12-23 06:18:20,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:18:20,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:20,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:18:20,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:18:20,430 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2020-12-23 06:18:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:20,491 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-23 06:18:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:18:20,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-23 06:18:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:20,493 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:18:20,493 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:18:20,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:18:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:18:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 06:18:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:18:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-23 06:18:20,498 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-12-23 06:18:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:20,498 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-23 06:18:20,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:18:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-23 06:18:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:18:20,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:20,499 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:20,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:18:20,714 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:20,715 INFO L82 PathProgramCache]: Analyzing trace with hash -186531256, now seen corresponding path program 8 times [2020-12-23 06:18:20,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:20,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127494030] [2020-12-23 06:18:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:20,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127494030] [2020-12-23 06:18:20,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593995281] [2020-12-23 06:18:20,901 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 06:18:21,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:18:21,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:18:21,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:18:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:18:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:21,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:18:21,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:18:21,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657852287] [2020-12-23 06:18:21,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:18:21,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:21,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:18:21,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:18:21,088 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2020-12-23 06:18:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:21,146 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-23 06:18:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:18:21,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-23 06:18:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:21,148 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:18:21,148 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:18:21,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:18:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:18:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 06:18:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:18:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 06:18:21,153 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-12-23 06:18:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:21,153 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 06:18:21,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:18:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 06:18:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:18:21,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:21,154 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:21,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:18:21,368 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash 906451974, now seen corresponding path program 9 times [2020-12-23 06:18:21,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:21,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631060378] [2020-12-23 06:18:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:21,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631060378] [2020-12-23 06:18:21,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862599777] [2020-12-23 06:18:21,533 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 06:21:28,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:21:28,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:21:28,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:21:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:21:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:21:28,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:21:28,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:21:28,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867903269] [2020-12-23 06:21:28,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:21:28,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:21:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:21:28,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:21:28,169 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2020-12-23 06:21:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:21:28,245 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-23 06:21:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:21:28,246 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-12-23 06:21:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:21:28,247 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:21:28,247 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:21:28,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:21:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:21:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 06:21:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:21:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-23 06:21:28,252 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-12-23 06:21:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:21:28,252 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-23 06:21:28,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:21:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-23 06:21:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:21:28,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:21:28,253 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:21:28,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:21:28,467 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:21:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:21:28,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1003651516, now seen corresponding path program 10 times [2020-12-23 06:21:28,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:21:28,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716548047] [2020-12-23 06:21:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:21:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:21:28,842 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:21:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:21:29,176 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:21:29,247 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:21:29,247 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:21:29,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 06:21:29,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:21:29 BoogieIcfgContainer [2020-12-23 06:21:29,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:21:29,329 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:21:29,329 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:21:29,329 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:21:29,330 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:13" (3/4) ... [2020-12-23 06:21:29,332 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 06:21:29,400 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test27-2.c-witness.graphml [2020-12-23 06:21:29,400 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:21:29,404 INFO L168 Benchmark]: Toolchain (without parser) took 197177.96 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.9 MB in the beginning and 131.3 MB in the end (delta: -4.4 MB). Peak memory consumption was 27.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:21:29,405 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.1 MB in the beginning and 123.0 MB in the end (delta: 96.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:21:29,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.68 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:21:29,406 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.37 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:21:29,409 INFO L168 Benchmark]: Boogie Preprocessor took 34.87 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 113.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:21:29,410 INFO L168 Benchmark]: RCFGBuilder took 549.14 ms. Allocated memory is still 151.0 MB. Free memory was 113.0 MB in the beginning and 128.1 MB in the end (delta: -15.1 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. [2020-12-23 06:21:29,411 INFO L168 Benchmark]: TraceAbstraction took 196177.04 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.7 MB in the beginning and 135.5 MB in the end (delta: -7.8 MB). Peak memory consumption was 101.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:21:29,413 INFO L168 Benchmark]: Witness Printer took 71.60 ms. Allocated memory is still 181.4 MB. Free memory was 135.5 MB in the beginning and 131.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-23 06:21:29,421 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.1 MB in the beginning and 123.0 MB in the end (delta: 96.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.68 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.37 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.87 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 113.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 549.14 ms. Allocated memory is still 151.0 MB. Free memory was 113.0 MB in the beginning and 128.1 MB in the end (delta: -15.1 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 196177.04 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.7 MB in the beginning and 135.5 MB in the end (delta: -7.8 MB). Peak memory consumption was 101.3 MB. Max. memory is 8.0 GB. * Witness Printer took 71.60 ms. Allocated memory is still 181.4 MB. Free memory was 135.5 MB in the beginning and 131.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 55]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] struct cont cont; [L24] struct dummy dummy; [L25] struct dummy *dummies[10]; [L26] int a[10]; [L27] int i, *pa; [L28] i = __VERIFIER_nondet_int() [L29] int j = 0; [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND FALSE !(j < 10) [L36] COND TRUE i >= 0 && i < 9 [L37] a[i] = i [L38] dummy.array = &a[i] [L39] dummies[i + 1] = &dummy [L40] cont.array = &dummies[0] [L41] EXPR cont.array [L41] EXPR cont.array[i] [L41] EXPR cont.array[i]->array [L41] pa = &cont.array[i]->array[i] [L42] EXPR a[i] [L42] COND TRUE a[i] > 0 [L43] EXPR dummies[i + 1] [L43] EXPR dummies[i + 1]->array [L43] EXPR dummies[i + 1]->array[i] [L43] i = dummies[i + 1]->array[i] - 10 [L44] EXPR \read(*pa) [L44] COND FALSE !(i < *pa) [L18] EXPR pc->array [L18] EXPR pc->array[i] [L18] EXPR pc->array[i]->array [L18] EXPR pc->array[i]->array[i] [L18] return pc->array[i]->array[i] == i; [L47] COND TRUE !check(&cont, i) [L55] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 196.0s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 55 SDslu, 520 SDs, 0 SdLazy, 189 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 190.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 379 ConstructedInterpolants, 0 QuantifiedInterpolants, 16761 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1404 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 0/570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...