/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/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:15:40,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:15:40,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:15:40,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:15:40,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:15:40,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:15:40,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:15:40,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:15:40,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:15:40,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:15:40,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:15:40,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:15:40,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:15:40,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:15:40,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:15:40,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:15:40,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:15:40,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:15:40,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:15:40,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:15:40,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:15:40,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:15:40,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:15:40,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:15:40,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:15:40,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:15:40,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:15:40,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:15:40,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:15:40,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:15:40,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:15:40,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:15:40,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:15:40,427 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:15:40,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:15:40,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:15:40,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:15:40,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:15:40,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:15:40,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:15:40,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:15:40,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:15:40,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:15:40,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:15:40,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:15:40,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:15:40,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:15:40,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:15:40,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:15:40,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:15:40,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:15:40,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:15:40,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:15:40,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:15:40,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:15:40,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:15:40,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:15:40,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:15:40,928 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:15:40,929 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:15:40,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep60-2.i [2021-01-06 10:15:41,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f0f3e8daf/bdd1a73621b7404bb7a22fa6cfbbfb4a/FLAG31b68d1c4 [2021-01-06 10:15:41,651 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:15:41,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep60-2.i [2021-01-06 10:15:41,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f0f3e8daf/bdd1a73621b7404bb7a22fa6cfbbfb4a/FLAG31b68d1c4 [2021-01-06 10:15:42,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f0f3e8daf/bdd1a73621b7404bb7a22fa6cfbbfb4a [2021-01-06 10:15:42,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:15:42,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:15:42,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:15:42,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:15:42,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:15:42,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13914d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42, skipping insertion in model container [2021-01-06 10:15:42,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:15:42,066 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] 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~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[59]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:15:42,307 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/sep60-2.i[1293,1306] [2021-01-06 10:15:42,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:15:42,328 INFO L203 MainTranslator]: Completed pre-run 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: 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~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[236],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:15:42,379 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/sep60-2.i[1293,1306] [2021-01-06 10:15:42,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:15:42,403 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:15:42,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42 WrapperNode [2021-01-06 10:15:42,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:15:42,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:15:42,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:15:42,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:15:42,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:15:42,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:15:42,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:15:42,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:15:42,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (1/1) ... [2021-01-06 10:15:42,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:15:42,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:15:42,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:15:42,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:15:42,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:15:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:15:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:15:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:15:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:15:42,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:15:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:15:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:15:43,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:15:43,192 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:15:43,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:15:43 BoogieIcfgContainer [2021-01-06 10:15:43,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:15:43,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:15:43,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:15:43,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:15:43,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:15:42" (1/3) ... [2021-01-06 10:15:43,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14eb51a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:15:43, skipping insertion in model container [2021-01-06 10:15:43,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:42" (2/3) ... [2021-01-06 10:15:43,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14eb51a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:15:43, skipping insertion in model container [2021-01-06 10:15:43,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:15:43" (3/3) ... [2021-01-06 10:15:43,209 INFO L111 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2021-01-06 10:15:43,217 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:15:43,222 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:15:43,248 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:15:43,291 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:15:43,291 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:15:43,292 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:15:43,292 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:15:43,292 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:15:43,293 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:15:43,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:15:43,293 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:15:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-01-06 10:15:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:15:43,319 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:43,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:43,321 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash -23080620, now seen corresponding path program 1 times [2021-01-06 10:15:43,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:43,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090232585] [2021-01-06 10:15:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:15:43,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090232585] [2021-01-06 10:15:43,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:43,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:15:43,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263639024] [2021-01-06 10:15:43,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:15:43,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:43,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:15:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:15:43,581 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2021-01-06 10:15:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:43,602 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2021-01-06 10:15:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:15:43,604 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-01-06 10:15:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:43,614 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:15:43,614 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:15:43,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:15:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:15:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 10:15:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:15:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-01-06 10:15:43,655 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2021-01-06 10:15:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:43,656 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-01-06 10:15:43,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:15:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-01-06 10:15:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:15:43,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:43,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:43,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:15:43,658 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:43,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:43,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1060874985, now seen corresponding path program 1 times [2021-01-06 10:15:43,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:43,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257310441] [2021-01-06 10:15:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:15:43,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257310441] [2021-01-06 10:15:43,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:43,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:15:43,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733835349] [2021-01-06 10:15:43,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:43,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:43,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:43,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:15:43,726 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 3 states. [2021-01-06 10:15:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:43,743 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-01-06 10:15:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:43,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:15:43,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:43,745 INFO L225 Difference]: With dead ends: 50 [2021-01-06 10:15:43,745 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:15:43,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:15:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:15:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 10:15:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:15:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-01-06 10:15:43,753 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2021-01-06 10:15:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:43,754 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-01-06 10:15:43,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-01-06 10:15:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:15:43,755 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:43,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:43,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:15:43,756 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:43,756 INFO L82 PathProgramCache]: Analyzing trace with hash -507200985, now seen corresponding path program 1 times [2021-01-06 10:15:43,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:43,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658521274] [2021-01-06 10:15:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:15:43,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658521274] [2021-01-06 10:15:43,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312797688] [2021-01-06 10:15:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:43,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:15:43,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:15:43,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:43,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:15:43,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638850992] [2021-01-06 10:15:43,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:43,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:43,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:43,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:43,965 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 3 states. [2021-01-06 10:15:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:44,002 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-01-06 10:15:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:44,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:15:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:44,004 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:15:44,005 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 10:15:44,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 10:15:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-01-06 10:15:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:15:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-01-06 10:15:44,012 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-01-06 10:15:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:44,013 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-01-06 10:15:44,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-01-06 10:15:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:15:44,014 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:44,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:44,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:15:44,228 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:44,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1833868074, now seen corresponding path program 1 times [2021-01-06 10:15:44,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:44,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148691746] [2021-01-06 10:15:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:15:44,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148691746] [2021-01-06 10:15:44,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973495352] [2021-01-06 10:15:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:44,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:15:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:44,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:44,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:15:44,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376314450] [2021-01-06 10:15:44,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:44,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:44,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:44,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:44,424 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2021-01-06 10:15:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:44,440 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-01-06 10:15:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:44,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2021-01-06 10:15:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:44,442 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:15:44,442 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 10:15:44,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 10:15:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-01-06 10:15:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:15:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-01-06 10:15:44,449 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2021-01-06 10:15:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:44,450 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-01-06 10:15:44,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-01-06 10:15:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:15:44,451 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:44,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:44,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:44,667 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:44,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1777663060, now seen corresponding path program 1 times [2021-01-06 10:15:44,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:44,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3262432] [2021-01-06 10:15:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:44,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3262432] [2021-01-06 10:15:44,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64699397] [2021-01-06 10:15:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:44,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:44,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:44,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:15:44,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111786361] [2021-01-06 10:15:44,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:44,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:44,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:44,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:44,940 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2021-01-06 10:15:44,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:44,963 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-01-06 10:15:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:44,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2021-01-06 10:15:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:44,965 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:15:44,965 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 10:15:44,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 10:15:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 10:15:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:15:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-01-06 10:15:44,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2021-01-06 10:15:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:44,972 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-01-06 10:15:44,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-01-06 10:15:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:15:44,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:44,974 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, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:45,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:45,188 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash -861329106, now seen corresponding path program 2 times [2021-01-06 10:15:45,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:45,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633318810] [2021-01-06 10:15:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:15:45,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633318810] [2021-01-06 10:15:45,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729591402] [2021-01-06 10:15:45,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:45,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:45,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:45,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:45,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 10:15:45,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378031949] [2021-01-06 10:15:45,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:45,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:45,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:45,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:45,380 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 7 states. [2021-01-06 10:15:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:45,457 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2021-01-06 10:15:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:45,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2021-01-06 10:15:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:45,458 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:15:45,458 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:15:45,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:15:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-01-06 10:15:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:15:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-01-06 10:15:45,467 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2021-01-06 10:15:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:45,468 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-01-06 10:15:45,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-01-06 10:15:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:15:45,469 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:45,469 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:45,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:45,683 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1600422655, now seen corresponding path program 3 times [2021-01-06 10:15:45,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:45,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620106508] [2021-01-06 10:15:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 10:15:45,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620106508] [2021-01-06 10:15:45,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352239589] [2021-01-06 10:15:45,773 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:45,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:15:45,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:45,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:45,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 10:15:45,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:45,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:15:45,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052095047] [2021-01-06 10:15:45,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:45,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:45,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:45,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:45,887 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 5 states. [2021-01-06 10:15:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:45,906 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-01-06 10:15:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:45,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-01-06 10:15:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:45,907 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:15:45,907 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 10:15:45,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 10:15:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-01-06 10:15:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:15:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-01-06 10:15:45,915 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 43 [2021-01-06 10:15:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:45,915 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-01-06 10:15:45,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-01-06 10:15:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:15:45,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:45,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:46,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:15:46,149 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:46,151 INFO L82 PathProgramCache]: Analyzing trace with hash 477657599, now seen corresponding path program 4 times [2021-01-06 10:15:46,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:46,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795529258] [2021-01-06 10:15:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-01-06 10:15:46,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795529258] [2021-01-06 10:15:46,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380293212] [2021-01-06 10:15:46,247 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:46,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:46,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:46,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:46,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-01-06 10:15:46,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:46,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:15:46,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568633350] [2021-01-06 10:15:46,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:46,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:46,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:46,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:46,389 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 7 states. [2021-01-06 10:15:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:46,415 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2021-01-06 10:15:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:46,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2021-01-06 10:15:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:46,416 INFO L225 Difference]: With dead ends: 86 [2021-01-06 10:15:46,416 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:15:46,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:15:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 10:15:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:15:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-01-06 10:15:46,424 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 45 [2021-01-06 10:15:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:46,424 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-01-06 10:15:46,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-01-06 10:15:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:15:46,426 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:46,426 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:46,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:46,642 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:46,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1220648899, now seen corresponding path program 5 times [2021-01-06 10:15:46,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:46,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092218564] [2021-01-06 10:15:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-01-06 10:15:46,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092218564] [2021-01-06 10:15:46,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824583866] [2021-01-06 10:15:46,748 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:46,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:15:46,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:46,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:46,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:15:46,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:46,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 10:15:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857445292] [2021-01-06 10:15:46,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:15:46,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:46,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:15:46,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:46,918 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 10 states. [2021-01-06 10:15:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:46,961 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2021-01-06 10:15:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:15:46,962 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2021-01-06 10:15:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:46,962 INFO L225 Difference]: With dead ends: 91 [2021-01-06 10:15:46,963 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 10:15:46,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 10:15:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-01-06 10:15:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:15:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-01-06 10:15:46,969 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 47 [2021-01-06 10:15:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:46,970 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-01-06 10:15:46,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:15:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-01-06 10:15:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:15:46,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:46,971 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:47,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:47,185 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1924928889, now seen corresponding path program 6 times [2021-01-06 10:15:47,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:47,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572505959] [2021-01-06 10:15:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 10:15:47,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572505959] [2021-01-06 10:15:47,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044029072] [2021-01-06 10:15:47,281 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:47,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:15:47,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:47,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-01-06 10:15:47,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:47,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-01-06 10:15:47,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781461183] [2021-01-06 10:15:47,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:15:47,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:47,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:15:47,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:47,538 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 11 states. [2021-01-06 10:15:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:47,619 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2021-01-06 10:15:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:15:47,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2021-01-06 10:15:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:47,624 INFO L225 Difference]: With dead ends: 109 [2021-01-06 10:15:47,624 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 10:15:47,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 10:15:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2021-01-06 10:15:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:15:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-01-06 10:15:47,651 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 51 [2021-01-06 10:15:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:47,652 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-01-06 10:15:47,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:15:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-01-06 10:15:47,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 10:15:47,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:47,654 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:47,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:15:47,855 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:47,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash -715721766, now seen corresponding path program 7 times [2021-01-06 10:15:47,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:47,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512622381] [2021-01-06 10:15:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:15:47,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512622381] [2021-01-06 10:15:47,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793205299] [2021-01-06 10:15:47,962 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:48,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:15:48,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:15:48,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:48,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:15:48,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103982927] [2021-01-06 10:15:48,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:15:48,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:15:48,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:48,164 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 10 states. [2021-01-06 10:15:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:48,198 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2021-01-06 10:15:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:15:48,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2021-01-06 10:15:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:48,200 INFO L225 Difference]: With dead ends: 114 [2021-01-06 10:15:48,201 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:15:48,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:15:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-01-06 10:15:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:15:48,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-01-06 10:15:48,210 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 62 [2021-01-06 10:15:48,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:48,211 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-01-06 10:15:48,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:15:48,211 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-01-06 10:15:48,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 10:15:48,212 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:48,212 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:48,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:48,428 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:48,429 INFO L82 PathProgramCache]: Analyzing trace with hash 699306332, now seen corresponding path program 8 times [2021-01-06 10:15:48,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:48,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610532891] [2021-01-06 10:15:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:15:48,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610532891] [2021-01-06 10:15:48,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647853708] [2021-01-06 10:15:48,558 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:48,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:48,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:48,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:15:48,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:15:48,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:48,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:15:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716001888] [2021-01-06 10:15:48,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:15:48,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:48,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:15:48,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:48,761 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 11 states. [2021-01-06 10:15:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:48,806 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2021-01-06 10:15:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:15:48,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2021-01-06 10:15:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:48,808 INFO L225 Difference]: With dead ends: 116 [2021-01-06 10:15:48,808 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 10:15:48,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 10:15:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-01-06 10:15:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 10:15:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-01-06 10:15:48,825 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 64 [2021-01-06 10:15:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:48,826 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-01-06 10:15:48,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:15:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-01-06 10:15:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 10:15:48,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:48,831 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:49,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:49,045 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash -963324322, now seen corresponding path program 9 times [2021-01-06 10:15:49,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:49,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460582949] [2021-01-06 10:15:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:15:49,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460582949] [2021-01-06 10:15:49,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660326344] [2021-01-06 10:15:49,164 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:49,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:15:49,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:49,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:49,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-01-06 10:15:49,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:49,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-01-06 10:15:49,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218500193] [2021-01-06 10:15:49,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:15:49,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:49,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:15:49,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:15:49,388 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 15 states. [2021-01-06 10:15:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:49,541 INFO L93 Difference]: Finished difference Result 133 states and 168 transitions. [2021-01-06 10:15:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:15:49,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2021-01-06 10:15:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:49,543 INFO L225 Difference]: With dead ends: 133 [2021-01-06 10:15:49,543 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 10:15:49,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:15:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 10:15:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2021-01-06 10:15:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 10:15:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-01-06 10:15:49,548 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 66 [2021-01-06 10:15:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:49,548 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-01-06 10:15:49,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:15:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-01-06 10:15:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 10:15:49,549 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:49,549 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:49,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:15:49,764 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:49,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:49,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1058409135, now seen corresponding path program 10 times [2021-01-06 10:15:49,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:49,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630970258] [2021-01-06 10:15:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 10:15:49,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630970258] [2021-01-06 10:15:49,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981098981] [2021-01-06 10:15:49,923 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:50,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:50,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:50,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:15:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 10:15:50,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:50,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:15:50,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985512229] [2021-01-06 10:15:50,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:15:50,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:50,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:15:50,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:15:50,099 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 13 states. [2021-01-06 10:15:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:50,142 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2021-01-06 10:15:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:15:50,143 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2021-01-06 10:15:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:50,144 INFO L225 Difference]: With dead ends: 138 [2021-01-06 10:15:50,144 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 10:15:50,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:15:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 10:15:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-01-06 10:15:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:15:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2021-01-06 10:15:50,149 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 77 [2021-01-06 10:15:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:50,150 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2021-01-06 10:15:50,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:15:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2021-01-06 10:15:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:15:50,150 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:50,151 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:50,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:15:50,364 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:50,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:50,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1423401871, now seen corresponding path program 11 times [2021-01-06 10:15:50,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:50,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987609625] [2021-01-06 10:15:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 10:15:50,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987609625] [2021-01-06 10:15:50,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899718310] [2021-01-06 10:15:50,541 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:50,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:15:50,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:50,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:50,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-01-06 10:15:51,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:51,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-01-06 10:15:51,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672472423] [2021-01-06 10:15:51,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:15:51,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:51,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:15:51,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:15:51,071 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 18 states. [2021-01-06 10:15:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:51,219 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2021-01-06 10:15:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:15:51,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2021-01-06 10:15:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:51,224 INFO L225 Difference]: With dead ends: 155 [2021-01-06 10:15:51,224 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:15:51,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:15:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:15:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2021-01-06 10:15:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 10:15:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2021-01-06 10:15:51,240 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 79 [2021-01-06 10:15:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:51,240 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2021-01-06 10:15:51,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:15:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2021-01-06 10:15:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 10:15:51,241 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:51,241 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:51,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:15:51,457 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:51,458 INFO L82 PathProgramCache]: Analyzing trace with hash 647910148, now seen corresponding path program 12 times [2021-01-06 10:15:51,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:51,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066880581] [2021-01-06 10:15:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-01-06 10:15:51,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066880581] [2021-01-06 10:15:51,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350755190] [2021-01-06 10:15:51,620 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:51,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:15:51,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-01-06 10:15:52,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:52,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2021-01-06 10:15:52,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206545473] [2021-01-06 10:15:52,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:15:52,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:52,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:15:52,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:15:52,116 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 18 states. [2021-01-06 10:15:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:52,200 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2021-01-06 10:15:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:15:52,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 90 [2021-01-06 10:15:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:52,202 INFO L225 Difference]: With dead ends: 163 [2021-01-06 10:15:52,202 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 10:15:52,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:15:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 10:15:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-01-06 10:15:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 10:15:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2021-01-06 10:15:52,207 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 90 [2021-01-06 10:15:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:52,208 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2021-01-06 10:15:52,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:15:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2021-01-06 10:15:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 10:15:52,209 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:52,209 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:52,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:52,423 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:52,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1749882872, now seen corresponding path program 13 times [2021-01-06 10:15:52,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:52,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572527371] [2021-01-06 10:15:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 10:15:52,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572527371] [2021-01-06 10:15:52,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374731458] [2021-01-06 10:15:52,600 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:15:52,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 10:15:52,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:52,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:15:52,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194732258] [2021-01-06 10:15:52,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:15:52,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:52,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:15:52,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:15:52,916 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 16 states. [2021-01-06 10:15:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:52,971 INFO L93 Difference]: Finished difference Result 166 states and 204 transitions. [2021-01-06 10:15:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:15:52,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 94 [2021-01-06 10:15:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:52,973 INFO L225 Difference]: With dead ends: 166 [2021-01-06 10:15:52,973 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:15:52,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:15:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:15:52,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-01-06 10:15:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 10:15:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2021-01-06 10:15:52,978 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 94 [2021-01-06 10:15:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:52,978 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2021-01-06 10:15:52,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:15:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2021-01-06 10:15:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 10:15:52,979 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:52,980 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:53,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:15:53,193 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash 98827658, now seen corresponding path program 14 times [2021-01-06 10:15:53,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:53,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970399501] [2021-01-06 10:15:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 10:15:53,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970399501] [2021-01-06 10:15:53,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536883526] [2021-01-06 10:15:53,383 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:53,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:53,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:53,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:15:53,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 10:15:53,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:53,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:15:53,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074192727] [2021-01-06 10:15:53,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:15:53,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:53,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:15:53,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:15:53,613 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand 17 states. [2021-01-06 10:15:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:53,681 INFO L93 Difference]: Finished difference Result 168 states and 206 transitions. [2021-01-06 10:15:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:15:53,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2021-01-06 10:15:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:53,683 INFO L225 Difference]: With dead ends: 168 [2021-01-06 10:15:53,683 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 10:15:53,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:15:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 10:15:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-01-06 10:15:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 10:15:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2021-01-06 10:15:53,688 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 96 [2021-01-06 10:15:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:53,688 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2021-01-06 10:15:53,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:15:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2021-01-06 10:15:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 10:15:53,690 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:53,690 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:53,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:15:53,904 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:53,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1406813556, now seen corresponding path program 15 times [2021-01-06 10:15:53,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:53,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969204990] [2021-01-06 10:15:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 10:15:54,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969204990] [2021-01-06 10:15:54,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834570274] [2021-01-06 10:15:54,124 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:54,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:15:54,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:54,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:54,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-01-06 10:15:54,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:54,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-01-06 10:15:54,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731314278] [2021-01-06 10:15:54,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:15:54,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:54,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:15:54,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:15:54,496 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 22 states. [2021-01-06 10:15:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:54,577 INFO L93 Difference]: Finished difference Result 173 states and 212 transitions. [2021-01-06 10:15:54,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:15:54,577 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2021-01-06 10:15:54,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:54,578 INFO L225 Difference]: With dead ends: 173 [2021-01-06 10:15:54,579 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 10:15:54,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:15:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 10:15:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-01-06 10:15:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 10:15:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2021-01-06 10:15:54,584 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 98 [2021-01-06 10:15:54,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:54,584 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2021-01-06 10:15:54,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:15:54,584 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2021-01-06 10:15:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 10:15:54,585 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:54,585 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:54,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:54,800 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:54,801 INFO L82 PathProgramCache]: Analyzing trace with hash 454650768, now seen corresponding path program 16 times [2021-01-06 10:15:54,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:54,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504337261] [2021-01-06 10:15:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-01-06 10:15:55,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504337261] [2021-01-06 10:15:55,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698211998] [2021-01-06 10:15:55,090 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:55,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:55,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:55,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:15:55,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-01-06 10:15:55,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:55,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:15:55,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175824117] [2021-01-06 10:15:55,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:15:55,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:55,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:15:55,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:15:55,405 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand 19 states. [2021-01-06 10:15:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:55,477 INFO L93 Difference]: Finished difference Result 176 states and 214 transitions. [2021-01-06 10:15:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:15:55,477 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 102 [2021-01-06 10:15:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:55,478 INFO L225 Difference]: With dead ends: 176 [2021-01-06 10:15:55,478 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 10:15:55,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:15:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 10:15:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-01-06 10:15:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 10:15:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2021-01-06 10:15:55,483 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 102 [2021-01-06 10:15:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:55,484 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2021-01-06 10:15:55,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:15:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2021-01-06 10:15:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 10:15:55,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:55,485 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:55,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:55,698 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:55,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1339695342, now seen corresponding path program 17 times [2021-01-06 10:15:55,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:55,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136543039] [2021-01-06 10:15:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-01-06 10:15:55,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136543039] [2021-01-06 10:15:55,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115972244] [2021-01-06 10:15:55,951 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:56,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 10:15:56,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:56,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:15:56,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-01-06 10:15:57,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:57,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:15:57,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714126073] [2021-01-06 10:15:57,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:15:57,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:57,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:15:57,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:15:57,061 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand 20 states. [2021-01-06 10:15:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:57,127 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2021-01-06 10:15:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:15:57,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2021-01-06 10:15:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:57,129 INFO L225 Difference]: With dead ends: 178 [2021-01-06 10:15:57,129 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:15:57,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:15:57,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:15:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-01-06 10:15:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 10:15:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2021-01-06 10:15:57,134 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 104 [2021-01-06 10:15:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:57,134 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2021-01-06 10:15:57,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:15:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2021-01-06 10:15:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:15:57,135 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:57,135 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:57,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:57,349 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:57,350 INFO L82 PathProgramCache]: Analyzing trace with hash 870545940, now seen corresponding path program 18 times [2021-01-06 10:15:57,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:57,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836752549] [2021-01-06 10:15:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-01-06 10:15:57,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836752549] [2021-01-06 10:15:57,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281868721] [2021-01-06 10:15:57,630 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:58,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 10:15:58,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:58,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:15:58,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-01-06 10:15:58,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:58,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-01-06 10:15:58,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268057748] [2021-01-06 10:15:58,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:15:58,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:58,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:15:58,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:15:58,543 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 26 states. [2021-01-06 10:15:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:58,727 INFO L93 Difference]: Finished difference Result 195 states and 242 transitions. [2021-01-06 10:15:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:15:58,727 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 106 [2021-01-06 10:15:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:58,728 INFO L225 Difference]: With dead ends: 195 [2021-01-06 10:15:58,729 INFO L226 Difference]: Without dead ends: 125 [2021-01-06 10:15:58,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:15:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-06 10:15:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2021-01-06 10:15:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 10:15:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 140 transitions. [2021-01-06 10:15:58,735 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 140 transitions. Word has length 106 [2021-01-06 10:15:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:58,735 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 140 transitions. [2021-01-06 10:15:58,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:15:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 140 transitions. [2021-01-06 10:15:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 10:15:58,737 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:58,737 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:58,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:15:58,953 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:58,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1113774245, now seen corresponding path program 19 times [2021-01-06 10:15:58,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:58,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730948767] [2021-01-06 10:15:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-01-06 10:15:59,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730948767] [2021-01-06 10:15:59,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102278144] [2021-01-06 10:15:59,298 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:59,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:15:59,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-01-06 10:15:59,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:59,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:15:59,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536072313] [2021-01-06 10:15:59,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:15:59,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:59,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:15:59,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:15:59,570 INFO L87 Difference]: Start difference. First operand 118 states and 140 transitions. Second operand 22 states. [2021-01-06 10:15:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:59,654 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2021-01-06 10:15:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:15:59,654 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 117 [2021-01-06 10:15:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:59,655 INFO L225 Difference]: With dead ends: 200 [2021-01-06 10:15:59,655 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 10:15:59,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:15:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 10:15:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-01-06 10:15:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 10:15:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2021-01-06 10:15:59,660 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 117 [2021-01-06 10:15:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:59,661 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2021-01-06 10:15:59,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:15:59,661 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2021-01-06 10:15:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 10:15:59,662 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:59,662 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:59,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:15:59,878 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:59,879 INFO L82 PathProgramCache]: Analyzing trace with hash 30343065, now seen corresponding path program 20 times [2021-01-06 10:15:59,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:59,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442855911] [2021-01-06 10:15:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-01-06 10:16:00,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442855911] [2021-01-06 10:16:00,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525511184] [2021-01-06 10:16:00,330 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:00,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:16:00,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:00,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:16:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-01-06 10:16:00,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:00,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:16:00,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613462922] [2021-01-06 10:16:00,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:16:00,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:00,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:16:00,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:16:00,676 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 23 states. [2021-01-06 10:16:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:00,765 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2021-01-06 10:16:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:16:00,771 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2021-01-06 10:16:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:00,772 INFO L225 Difference]: With dead ends: 202 [2021-01-06 10:16:00,772 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 10:16:00,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:16:00,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 10:16:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-01-06 10:16:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 10:16:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2021-01-06 10:16:00,779 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 119 [2021-01-06 10:16:00,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:00,779 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2021-01-06 10:16:00,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:16:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2021-01-06 10:16:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 10:16:00,780 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:00,781 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:00,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:00,995 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:00,996 INFO L82 PathProgramCache]: Analyzing trace with hash 15450199, now seen corresponding path program 21 times [2021-01-06 10:16:00,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:00,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403721829] [2021-01-06 10:16:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-01-06 10:16:01,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403721829] [2021-01-06 10:16:01,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946292036] [2021-01-06 10:16:01,375 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:01,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:16:01,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:01,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:16:01,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-01-06 10:16:01,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:01,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2021-01-06 10:16:01,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576339922] [2021-01-06 10:16:01,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:16:01,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:01,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:16:01,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:16:01,895 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 29 states. [2021-01-06 10:16:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:02,063 INFO L93 Difference]: Finished difference Result 207 states and 252 transitions. [2021-01-06 10:16:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:16:02,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 121 [2021-01-06 10:16:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:02,065 INFO L225 Difference]: With dead ends: 207 [2021-01-06 10:16:02,065 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 10:16:02,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:16:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 10:16:02,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-01-06 10:16:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 10:16:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2021-01-06 10:16:02,070 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 121 [2021-01-06 10:16:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:02,071 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2021-01-06 10:16:02,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:16:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2021-01-06 10:16:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-01-06 10:16:02,072 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:02,072 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:02,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:16:02,286 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:02,287 INFO L82 PathProgramCache]: Analyzing trace with hash 887235731, now seen corresponding path program 22 times [2021-01-06 10:16:02,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:02,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617006915] [2021-01-06 10:16:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-01-06 10:16:02,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617006915] [2021-01-06 10:16:02,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907898223] [2021-01-06 10:16:02,738 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:02,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:16:02,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:02,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:16:02,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-01-06 10:16:02,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:02,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 10:16:02,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220039276] [2021-01-06 10:16:02,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:16:02,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:02,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:16:02,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:16:02,995 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand 25 states. [2021-01-06 10:16:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:03,093 INFO L93 Difference]: Finished difference Result 210 states and 254 transitions. [2021-01-06 10:16:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:16:03,093 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 125 [2021-01-06 10:16:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:03,094 INFO L225 Difference]: With dead ends: 210 [2021-01-06 10:16:03,094 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 10:16:03,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:16:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 10:16:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-01-06 10:16:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 10:16:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2021-01-06 10:16:03,099 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 125 [2021-01-06 10:16:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:03,100 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2021-01-06 10:16:03,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:16:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2021-01-06 10:16:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-01-06 10:16:03,101 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:03,101 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:03,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:03,311 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1582227153, now seen corresponding path program 23 times [2021-01-06 10:16:03,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:03,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894449851] [2021-01-06 10:16:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-01-06 10:16:03,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894449851] [2021-01-06 10:16:03,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804437836] [2021-01-06 10:16:03,764 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:05,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 10:16:05,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:16:05,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2021-01-06 10:16:05,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:05,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-01-06 10:16:05,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036868687] [2021-01-06 10:16:05,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:16:05,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:05,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:16:05,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:16:05,901 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand 32 states. [2021-01-06 10:16:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:06,211 INFO L93 Difference]: Finished difference Result 227 states and 280 transitions. [2021-01-06 10:16:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:16:06,211 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 127 [2021-01-06 10:16:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:06,213 INFO L225 Difference]: With dead ends: 227 [2021-01-06 10:16:06,213 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 10:16:06,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:16:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 10:16:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2021-01-06 10:16:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 10:16:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2021-01-06 10:16:06,220 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 127 [2021-01-06 10:16:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:06,220 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2021-01-06 10:16:06,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:16:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2021-01-06 10:16:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 10:16:06,222 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:06,222 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:06,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:16:06,437 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1830905794, now seen corresponding path program 24 times [2021-01-06 10:16:06,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:06,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417982952] [2021-01-06 10:16:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-01-06 10:16:06,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417982952] [2021-01-06 10:16:06,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126587824] [2021-01-06 10:16:06,860 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:07,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:16:07,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:07,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:16:07,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2021-01-06 10:16:07,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:07,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2021-01-06 10:16:07,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682649874] [2021-01-06 10:16:07,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:16:07,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:07,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:16:08,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:16:08,000 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand 33 states. [2021-01-06 10:16:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:08,181 INFO L93 Difference]: Finished difference Result 235 states and 286 transitions. [2021-01-06 10:16:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:16:08,182 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 138 [2021-01-06 10:16:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:08,183 INFO L225 Difference]: With dead ends: 235 [2021-01-06 10:16:08,183 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 10:16:08,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:16:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 10:16:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-01-06 10:16:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 10:16:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2021-01-06 10:16:08,189 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 138 [2021-01-06 10:16:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:08,190 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2021-01-06 10:16:08,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:16:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2021-01-06 10:16:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 10:16:08,191 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:08,192 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:08,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:16:08,405 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1631469626, now seen corresponding path program 25 times [2021-01-06 10:16:08,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:08,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760581593] [2021-01-06 10:16:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-01-06 10:16:08,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760581593] [2021-01-06 10:16:08,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062104274] [2021-01-06 10:16:08,934 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:09,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:16:09,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-01-06 10:16:09,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:09,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:16:09,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867173396] [2021-01-06 10:16:09,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:16:09,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:09,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:16:09,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:16:09,251 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 28 states. [2021-01-06 10:16:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:09,338 INFO L93 Difference]: Finished difference Result 238 states and 288 transitions. [2021-01-06 10:16:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:16:09,339 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 142 [2021-01-06 10:16:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:09,340 INFO L225 Difference]: With dead ends: 238 [2021-01-06 10:16:09,340 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 10:16:09,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:16:09,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 10:16:09,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-01-06 10:16:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 10:16:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2021-01-06 10:16:09,346 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 142 [2021-01-06 10:16:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:09,346 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2021-01-06 10:16:09,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:16:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2021-01-06 10:16:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-01-06 10:16:09,347 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:09,348 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:09,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:16:09,563 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:09,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1804269240, now seen corresponding path program 26 times [2021-01-06 10:16:09,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:09,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024202906] [2021-01-06 10:16:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-01-06 10:16:10,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024202906] [2021-01-06 10:16:10,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807350755] [2021-01-06 10:16:10,099 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:10,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:16:10,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:10,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:16:10,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-01-06 10:16:10,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:10,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:16:10,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395185795] [2021-01-06 10:16:10,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:16:10,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:10,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:16:10,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:16:10,386 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand 29 states. [2021-01-06 10:16:10,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:10,509 INFO L93 Difference]: Finished difference Result 240 states and 290 transitions. [2021-01-06 10:16:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:16:10,510 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 144 [2021-01-06 10:16:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:10,511 INFO L225 Difference]: With dead ends: 240 [2021-01-06 10:16:10,511 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 10:16:10,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:16:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 10:16:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-01-06 10:16:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 10:16:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2021-01-06 10:16:10,517 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 144 [2021-01-06 10:16:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:10,518 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2021-01-06 10:16:10,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:16:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2021-01-06 10:16:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 10:16:10,519 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:10,519 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:10,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:10,732 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash -360973750, now seen corresponding path program 27 times [2021-01-06 10:16:10,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:10,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374238915] [2021-01-06 10:16:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-01-06 10:16:11,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374238915] [2021-01-06 10:16:11,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850019810] [2021-01-06 10:16:11,246 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:11,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:16:11,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:16:11,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2021-01-06 10:16:12,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:12,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2021-01-06 10:16:12,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747327666] [2021-01-06 10:16:12,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:16:12,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:12,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:16:12,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:16:12,007 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 37 states. [2021-01-06 10:16:12,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:12,278 INFO L93 Difference]: Finished difference Result 257 states and 316 transitions. [2021-01-06 10:16:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:16:12,279 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 146 [2021-01-06 10:16:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:12,280 INFO L225 Difference]: With dead ends: 257 [2021-01-06 10:16:12,280 INFO L226 Difference]: Without dead ends: 165 [2021-01-06 10:16:12,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:16:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-01-06 10:16:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2021-01-06 10:16:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 10:16:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2021-01-06 10:16:12,287 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 146 [2021-01-06 10:16:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:12,288 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2021-01-06 10:16:12,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:16:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2021-01-06 10:16:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-01-06 10:16:12,289 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:12,289 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:12,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 10:16:12,503 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:12,503 INFO L82 PathProgramCache]: Analyzing trace with hash -766472987, now seen corresponding path program 28 times [2021-01-06 10:16:12,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:12,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247527510] [2021-01-06 10:16:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-01-06 10:16:13,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247527510] [2021-01-06 10:16:13,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458942751] [2021-01-06 10:16:13,070 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:13,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:16:13,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:13,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:16:13,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2021-01-06 10:16:13,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:13,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2021-01-06 10:16:13,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299264906] [2021-01-06 10:16:13,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 10:16:13,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:13,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 10:16:13,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:16:13,574 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand 39 states. [2021-01-06 10:16:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:13,920 INFO L93 Difference]: Finished difference Result 277 states and 342 transitions. [2021-01-06 10:16:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:16:13,921 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 157 [2021-01-06 10:16:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:13,922 INFO L225 Difference]: With dead ends: 277 [2021-01-06 10:16:13,923 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 10:16:13,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 10:16:13,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 10:16:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2021-01-06 10:16:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 10:16:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2021-01-06 10:16:13,935 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 157 [2021-01-06 10:16:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:13,935 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2021-01-06 10:16:13,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 10:16:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2021-01-06 10:16:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-01-06 10:16:13,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:13,937 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:14,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:14,152 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash -36456210, now seen corresponding path program 29 times [2021-01-06 10:16:14,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:14,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70987881] [2021-01-06 10:16:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 10:16:14,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70987881] [2021-01-06 10:16:14,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391088266] [2021-01-06 10:16:14,820 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:32,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-01-06 10:16:32,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:16:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2021-01-06 10:16:32,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:32,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2021-01-06 10:16:32,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137979105] [2021-01-06 10:16:32,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:16:32,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:16:32,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:16:32,582 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand 41 states. [2021-01-06 10:16:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:32,920 INFO L93 Difference]: Finished difference Result 297 states and 368 transitions. [2021-01-06 10:16:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:16:32,921 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 168 [2021-01-06 10:16:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:32,922 INFO L225 Difference]: With dead ends: 297 [2021-01-06 10:16:32,922 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 10:16:32,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:16:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 10:16:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 180. [2021-01-06 10:16:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 10:16:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2021-01-06 10:16:32,934 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 168 [2021-01-06 10:16:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:32,934 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2021-01-06 10:16:32,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:16:32,935 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2021-01-06 10:16:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-01-06 10:16:32,936 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:32,936 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:33,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:16:33,148 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:33,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1377034177, now seen corresponding path program 30 times [2021-01-06 10:16:33,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:33,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536083245] [2021-01-06 10:16:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 10:16:33,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536083245] [2021-01-06 10:16:33,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231851490] [2021-01-06 10:16:33,775 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:35,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 10:16:35,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:35,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:16:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 10:16:35,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:35,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2021-01-06 10:16:35,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388340999] [2021-01-06 10:16:35,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:16:35,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:16:35,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:16:35,389 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand 40 states. [2021-01-06 10:16:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:35,556 INFO L93 Difference]: Finished difference Result 305 states and 374 transitions. [2021-01-06 10:16:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:16:35,556 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 179 [2021-01-06 10:16:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:35,558 INFO L225 Difference]: With dead ends: 305 [2021-01-06 10:16:35,558 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 10:16:35,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:16:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 10:16:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-01-06 10:16:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 10:16:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2021-01-06 10:16:35,565 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 179 [2021-01-06 10:16:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:35,565 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2021-01-06 10:16:35,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:16:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2021-01-06 10:16:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-01-06 10:16:35,566 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:35,566 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:35,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:16:35,780 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1181418755, now seen corresponding path program 31 times [2021-01-06 10:16:35,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:35,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191307858] [2021-01-06 10:16:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-01-06 10:16:36,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191307858] [2021-01-06 10:16:36,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595340961] [2021-01-06 10:16:36,555 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:36,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:16:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-01-06 10:16:36,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:36,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 10:16:36,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137551601] [2021-01-06 10:16:36,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:16:36,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:16:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:16:36,923 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand 34 states. [2021-01-06 10:16:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:37,071 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2021-01-06 10:16:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:16:37,072 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 183 [2021-01-06 10:16:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:37,073 INFO L225 Difference]: With dead ends: 308 [2021-01-06 10:16:37,074 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 10:16:37,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:16:37,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 10:16:37,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-01-06 10:16:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 10:16:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2021-01-06 10:16:37,081 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 183 [2021-01-06 10:16:37,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:37,081 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2021-01-06 10:16:37,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:16:37,081 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2021-01-06 10:16:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-01-06 10:16:37,082 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:37,083 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:37,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:16:37,299 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:37,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:37,300 INFO L82 PathProgramCache]: Analyzing trace with hash 650955707, now seen corresponding path program 32 times [2021-01-06 10:16:37,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:37,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824104364] [2021-01-06 10:16:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-01-06 10:16:38,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824104364] [2021-01-06 10:16:38,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266444259] [2021-01-06 10:16:38,060 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:38,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:16:38,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:38,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:16:38,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-01-06 10:16:38,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:38,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 10:16:38,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704332075] [2021-01-06 10:16:38,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:16:38,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:38,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:16:38,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:16:38,456 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 35 states. [2021-01-06 10:16:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:38,599 INFO L93 Difference]: Finished difference Result 310 states and 378 transitions. [2021-01-06 10:16:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:16:38,600 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 185 [2021-01-06 10:16:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:38,601 INFO L225 Difference]: With dead ends: 310 [2021-01-06 10:16:38,602 INFO L226 Difference]: Without dead ends: 189 [2021-01-06 10:16:38,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:16:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-01-06 10:16:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-01-06 10:16:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2021-01-06 10:16:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 222 transitions. [2021-01-06 10:16:38,609 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 222 transitions. Word has length 185 [2021-01-06 10:16:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:38,609 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 222 transitions. [2021-01-06 10:16:38,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:16:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 222 transitions. [2021-01-06 10:16:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-01-06 10:16:38,610 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:38,610 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:38,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 10:16:38,825 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:38,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:38,825 INFO L82 PathProgramCache]: Analyzing trace with hash 626222329, now seen corresponding path program 33 times [2021-01-06 10:16:38,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:38,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459522936] [2021-01-06 10:16:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-01-06 10:16:39,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459522936] [2021-01-06 10:16:39,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749868885] [2021-01-06 10:16:39,643 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:40,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 10:16:40,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:40,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:16:40,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-01-06 10:16:40,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:40,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 11] total 44 [2021-01-06 10:16:40,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218733494] [2021-01-06 10:16:40,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:16:40,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:40,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:16:40,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:16:40,898 INFO L87 Difference]: Start difference. First operand 188 states and 222 transitions. Second operand 44 states. [2021-01-06 10:16:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:41,153 INFO L93 Difference]: Finished difference Result 315 states and 384 transitions. [2021-01-06 10:16:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:16:41,154 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 187 [2021-01-06 10:16:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:41,155 INFO L225 Difference]: With dead ends: 315 [2021-01-06 10:16:41,155 INFO L226 Difference]: Without dead ends: 194 [2021-01-06 10:16:41,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:16:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-01-06 10:16:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2021-01-06 10:16:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-01-06 10:16:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 226 transitions. [2021-01-06 10:16:41,162 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 226 transitions. Word has length 187 [2021-01-06 10:16:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:41,162 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 226 transitions. [2021-01-06 10:16:41,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:16:41,162 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 226 transitions. [2021-01-06 10:16:41,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 10:16:41,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:41,164 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:41,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:16:41,379 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash -667749323, now seen corresponding path program 34 times [2021-01-06 10:16:41,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:41,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148547380] [2021-01-06 10:16:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-01-06 10:16:42,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148547380] [2021-01-06 10:16:42,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425232487] [2021-01-06 10:16:42,206 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:42,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:16:42,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:42,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 10:16:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-01-06 10:16:42,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:42,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 10:16:42,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379002142] [2021-01-06 10:16:42,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:16:42,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:16:42,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:16:42,602 INFO L87 Difference]: Start difference. First operand 192 states and 226 transitions. Second operand 37 states. [2021-01-06 10:16:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:42,745 INFO L93 Difference]: Finished difference Result 318 states and 386 transitions. [2021-01-06 10:16:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:16:42,746 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 191 [2021-01-06 10:16:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:42,747 INFO L225 Difference]: With dead ends: 318 [2021-01-06 10:16:42,747 INFO L226 Difference]: Without dead ends: 195 [2021-01-06 10:16:42,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:16:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-01-06 10:16:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-01-06 10:16:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-01-06 10:16:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 228 transitions. [2021-01-06 10:16:42,754 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 228 transitions. Word has length 191 [2021-01-06 10:16:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:42,755 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 228 transitions. [2021-01-06 10:16:42,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:16:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 228 transitions. [2021-01-06 10:16:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-01-06 10:16:42,757 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:42,757 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:42,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:16:42,972 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:42,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1016781069, now seen corresponding path program 35 times [2021-01-06 10:16:42,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:42,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377124959] [2021-01-06 10:16:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-01-06 10:16:43,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377124959] [2021-01-06 10:16:43,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123203519] [2021-01-06 10:16:43,923 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:18:11,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-01-06 10:18:11,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:18:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:18:11,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:18:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-01-06 10:18:11,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:18:11,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 10:18:11,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273779338] [2021-01-06 10:18:11,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 10:18:11,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:18:11,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 10:18:11,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:18:11,437 INFO L87 Difference]: Start difference. First operand 194 states and 228 transitions. Second operand 38 states. [2021-01-06 10:18:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:18:11,577 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2021-01-06 10:18:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:18:11,578 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 193 [2021-01-06 10:18:11,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:18:11,580 INFO L225 Difference]: With dead ends: 320 [2021-01-06 10:18:11,580 INFO L226 Difference]: Without dead ends: 197 [2021-01-06 10:18:11,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:18:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-01-06 10:18:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-01-06 10:18:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2021-01-06 10:18:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 230 transitions. [2021-01-06 10:18:11,596 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 230 transitions. Word has length 193 [2021-01-06 10:18:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:18:11,596 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 230 transitions. [2021-01-06 10:18:11,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 10:18:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 230 transitions. [2021-01-06 10:18:11,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-01-06 10:18:11,606 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:18:11,606 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:18:11,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:18:11,822 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:18:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:18:11,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1428839887, now seen corresponding path program 36 times [2021-01-06 10:18:11,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:18:11,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47024291] [2021-01-06 10:18:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:18:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:18:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-01-06 10:18:12,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47024291] [2021-01-06 10:18:12,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523067089] [2021-01-06 10:18:12,728 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:18:22,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:18:22,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:18:22,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:18:22,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:18:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-01-06 10:18:22,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:18:22,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2021-01-06 10:18:22,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207429581] [2021-01-06 10:18:22,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:18:22,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:18:22,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:18:22,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:18:22,626 INFO L87 Difference]: Start difference. First operand 196 states and 230 transitions. Second operand 48 states. [2021-01-06 10:18:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:18:22,856 INFO L93 Difference]: Finished difference Result 325 states and 394 transitions. [2021-01-06 10:18:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 10:18:22,857 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 195 [2021-01-06 10:18:22,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:18:22,859 INFO L225 Difference]: With dead ends: 325 [2021-01-06 10:18:22,859 INFO L226 Difference]: Without dead ends: 202 [2021-01-06 10:18:22,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:18:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-01-06 10:18:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-01-06 10:18:22,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2021-01-06 10:18:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 234 transitions. [2021-01-06 10:18:22,868 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 234 transitions. Word has length 195 [2021-01-06 10:18:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:18:22,868 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 234 transitions. [2021-01-06 10:18:22,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:18:22,868 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 234 transitions. [2021-01-06 10:18:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-01-06 10:18:22,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:18:22,870 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:18:23,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:18:23,085 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:18:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:18:23,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1018976915, now seen corresponding path program 37 times [2021-01-06 10:18:23,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:18:23,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259966497] [2021-01-06 10:18:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:18:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:18:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-01-06 10:18:24,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259966497] [2021-01-06 10:18:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046818175] [2021-01-06 10:18:24,148 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:18:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:18:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:18:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:18:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-01-06 10:18:24,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:18:24,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 10:18:24,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380868946] [2021-01-06 10:18:24,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:18:24,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:18:24,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:18:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:18:24,577 INFO L87 Difference]: Start difference. First operand 200 states and 234 transitions. Second operand 40 states. [2021-01-06 10:18:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:18:24,755 INFO L93 Difference]: Finished difference Result 328 states and 396 transitions. [2021-01-06 10:18:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:18:24,759 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 199 [2021-01-06 10:18:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:18:24,761 INFO L225 Difference]: With dead ends: 328 [2021-01-06 10:18:24,761 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 10:18:24,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:18:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 10:18:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-01-06 10:18:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 10:18:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 236 transitions. [2021-01-06 10:18:24,769 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 236 transitions. Word has length 199 [2021-01-06 10:18:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:18:24,769 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 236 transitions. [2021-01-06 10:18:24,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:18:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 236 transitions. [2021-01-06 10:18:24,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-01-06 10:18:24,771 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:18:24,771 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:18:24,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:18:24,986 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:18:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:18:24,987 INFO L82 PathProgramCache]: Analyzing trace with hash -991020501, now seen corresponding path program 38 times [2021-01-06 10:18:24,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:18:24,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190556105] [2021-01-06 10:18:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:18:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:18:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1904 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-01-06 10:18:26,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190556105] [2021-01-06 10:18:26,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827342765] [2021-01-06 10:18:26,072 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:18:26,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:18:26,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:18:26,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:18:26,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:18:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1904 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-01-06 10:18:26,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:18:26,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 10:18:26,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142567727] [2021-01-06 10:18:26,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:18:26,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:18:26,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:18:26,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:18:26,503 INFO L87 Difference]: Start difference. First operand 202 states and 236 transitions. Second operand 41 states. [2021-01-06 10:18:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:18:26,655 INFO L93 Difference]: Finished difference Result 330 states and 398 transitions. [2021-01-06 10:18:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:18:26,656 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 201 [2021-01-06 10:18:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:18:26,658 INFO L225 Difference]: With dead ends: 330 [2021-01-06 10:18:26,658 INFO L226 Difference]: Without dead ends: 205 [2021-01-06 10:18:26,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:18:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-01-06 10:18:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-01-06 10:18:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2021-01-06 10:18:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 238 transitions. [2021-01-06 10:18:26,665 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 238 transitions. Word has length 201 [2021-01-06 10:18:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:18:26,666 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 238 transitions. [2021-01-06 10:18:26,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:18:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 238 transitions. [2021-01-06 10:18:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-01-06 10:18:26,667 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:18:26,667 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:18:26,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:18:26,883 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:18:26,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:18:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash 105289577, now seen corresponding path program 39 times [2021-01-06 10:18:26,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:18:26,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893480335] [2021-01-06 10:18:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:18:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:18:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1979 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-01-06 10:18:28,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893480335] [2021-01-06 10:18:28,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923823631] [2021-01-06 10:18:28,075 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:18:28,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 10:18:28,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:18:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:18:28,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:18:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1979 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1834 trivial. 0 not checked. [2021-01-06 10:18:29,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:18:29,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2021-01-06 10:18:29,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929866820] [2021-01-06 10:18:29,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 10:18:29,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:18:29,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 10:18:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:18:29,511 INFO L87 Difference]: Start difference. First operand 204 states and 238 transitions. Second operand 52 states. [2021-01-06 10:18:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:18:30,034 INFO L93 Difference]: Finished difference Result 347 states and 424 transitions. [2021-01-06 10:18:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 10:18:30,035 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 203 [2021-01-06 10:18:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:18:30,037 INFO L225 Difference]: With dead ends: 347 [2021-01-06 10:18:30,037 INFO L226 Difference]: Without dead ends: 222 [2021-01-06 10:18:30,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:18:30,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-01-06 10:18:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2021-01-06 10:18:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2021-01-06 10:18:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 252 transitions. [2021-01-06 10:18:30,048 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 252 transitions. Word has length 203 [2021-01-06 10:18:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:18:30,048 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 252 transitions. [2021-01-06 10:18:30,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 10:18:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 252 transitions. [2021-01-06 10:18:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-01-06 10:18:30,050 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:18:30,050 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:18:30,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 10:18:30,260 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:18:30,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:18:30,261 INFO L82 PathProgramCache]: Analyzing trace with hash 766279978, now seen corresponding path program 40 times [2021-01-06 10:18:30,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:18:30,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914540498] [2021-01-06 10:18:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:18:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:18:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2021-01-06 10:18:31,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914540498] [2021-01-06 10:18:31,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37095723] [2021-01-06 10:18:31,479 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:18:31,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:18:31,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:18:31,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:18:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:18:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2021-01-06 10:18:31,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:18:31,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 10:18:31,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022062199] [2021-01-06 10:18:31,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 10:18:31,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:18:31,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 10:18:31,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:18:31,923 INFO L87 Difference]: Start difference. First operand 215 states and 252 transitions. Second operand 43 states. [2021-01-06 10:18:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:18:32,108 INFO L93 Difference]: Finished difference Result 352 states and 426 transitions. [2021-01-06 10:18:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:18:32,109 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 214 [2021-01-06 10:18:32,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:18:32,110 INFO L225 Difference]: With dead ends: 352 [2021-01-06 10:18:32,110 INFO L226 Difference]: Without dead ends: 218 [2021-01-06 10:18:32,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:18:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-01-06 10:18:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-01-06 10:18:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 10:18:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 254 transitions. [2021-01-06 10:18:32,118 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 254 transitions. Word has length 214 [2021-01-06 10:18:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:18:32,118 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 254 transitions. [2021-01-06 10:18:32,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 10:18:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 254 transitions. [2021-01-06 10:18:32,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 10:18:32,120 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:18:32,120 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:18:32,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:18:32,336 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:18:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:18:32,336 INFO L82 PathProgramCache]: Analyzing trace with hash 558504108, now seen corresponding path program 41 times [2021-01-06 10:18:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:18:32,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874442169] [2021-01-06 10:18:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:18:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:18:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2228 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2021-01-06 10:18:33,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874442169] [2021-01-06 10:18:33,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289835336] [2021-01-06 10:18:33,594 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true