/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/max20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:22:03,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:22:03,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:22:03,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:22:03,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:22:03,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:22:03,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:22:03,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:22:03,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:22:03,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:22:03,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:22:03,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:22:03,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:22:03,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:22:03,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:22:03,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:22:03,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:22:03,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:22:03,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:22:03,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:22:03,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:22:03,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:22:03,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:22:03,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:22:03,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:22:03,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:22:03,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:22:03,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:22:03,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:22:03,493 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:22:03,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:22:03,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:22:03,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:22:03,499 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:22:03,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:22:03,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:22:03,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:22:03,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:22:03,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:22:03,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:22:03,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:22:03,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:22:03,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:22:03,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:22:03,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:22:03,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:22:03,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:22:03,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:22:03,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:22:03,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:22:03,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:22:03,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:22:03,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:22:03,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:22:03,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:22:03,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:22:04,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:22:04,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:22:04,005 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:22:04,006 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:22:04,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max20-1.i [2020-12-23 00:22:04,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f138533f4/25dd9f09b14c4bb8a5e2249a6957807b/FLAGdc6511738 [2020-12-23 00:22:04,759 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:22:04,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max20-1.i [2020-12-23 00:22:04,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f138533f4/25dd9f09b14c4bb8a5e2249a6957807b/FLAGdc6511738 [2020-12-23 00:22:05,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f138533f4/25dd9f09b14c4bb8a5e2249a6957807b [2020-12-23 00:22:05,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:22:05,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:22:05,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:22:05,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:22:05,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:22:05,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@524c38ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05, skipping insertion in model container [2020-12-23 00:22:05,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:22:05,171 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: 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[19]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:22:05,434 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/max20-1.i[1290,1303] [2020-12-23 00:22:05,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:22:05,447 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: 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[76],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:22:05,475 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/max20-1.i[1290,1303] [2020-12-23 00:22:05,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:22:05,494 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:22:05,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05 WrapperNode [2020-12-23 00:22:05,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:22:05,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:22:05,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:22:05,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:22:05,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:22:05,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:22:05,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:22:05,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:22:05,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (1/1) ... [2020-12-23 00:22:05,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:22:05,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:22:05,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:22:05,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:22:05,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:22:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:22:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:22:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:22:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:22:05,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:22:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:22:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:22:06,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:22:06,479 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:22:06,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:22:06 BoogieIcfgContainer [2020-12-23 00:22:06,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:22:06,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:22:06,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:22:06,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:22:06,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:22:05" (1/3) ... [2020-12-23 00:22:06,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d6191a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:22:06, skipping insertion in model container [2020-12-23 00:22:06,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:22:05" (2/3) ... [2020-12-23 00:22:06,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d6191a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:22:06, skipping insertion in model container [2020-12-23 00:22:06,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:22:06" (3/3) ... [2020-12-23 00:22:06,497 INFO L111 eAbstractionObserver]: Analyzing ICFG max20-1.i [2020-12-23 00:22:06,506 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:22:06,512 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:22:06,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:22:06,588 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:22:06,588 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:22:06,588 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:22:06,589 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:22:06,589 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:22:06,589 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:22:06,589 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:22:06,589 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:22:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-23 00:22:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:22:06,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:06,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:06,615 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1332003061, now seen corresponding path program 1 times [2020-12-23 00:22:06,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:06,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163580122] [2020-12-23 00:22:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:22:06,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163580122] [2020-12-23 00:22:06,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:22:06,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:22:06,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365863028] [2020-12-23 00:22:06,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:22:06,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:06,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:22:06,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:22:06,914 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-23 00:22:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:06,932 INFO L93 Difference]: Finished difference Result 62 states and 86 transitions. [2020-12-23 00:22:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:22:06,934 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-23 00:22:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:06,944 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:22:06,944 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:22:06,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:22:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:22:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 00:22:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:22:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-23 00:22:06,987 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2020-12-23 00:22:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:06,988 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-23 00:22:06,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:22:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-23 00:22:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:22:06,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:06,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:06,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:22:06,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:06,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:06,991 INFO L82 PathProgramCache]: Analyzing trace with hash 741944299, now seen corresponding path program 1 times [2020-12-23 00:22:06,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:06,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406303695] [2020-12-23 00:22:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:22:07,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406303695] [2020-12-23 00:22:07,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:22:07,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:22:07,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169390159] [2020-12-23 00:22:07,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:22:07,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:07,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:22:07,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:22:07,054 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 3 states. [2020-12-23 00:22:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:07,074 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-12-23 00:22:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:22:07,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:22:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:07,077 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:22:07,077 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:22:07,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:22:07,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:22:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 00:22:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:22:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-23 00:22:07,085 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2020-12-23 00:22:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:07,085 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-23 00:22:07,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:22:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-23 00:22:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:22:07,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:07,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:07,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:22:07,087 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:07,088 INFO L82 PathProgramCache]: Analyzing trace with hash -826131671, now seen corresponding path program 1 times [2020-12-23 00:22:07,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:07,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176776050] [2020-12-23 00:22:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:22:07,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176776050] [2020-12-23 00:22:07,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138085919] [2020-12-23 00:22:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:07,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:22:07,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:22:07,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:22:07,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:22:07,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734542383] [2020-12-23 00:22:07,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:22:07,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:07,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:22:07,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:22:07,276 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2020-12-23 00:22:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:07,333 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2020-12-23 00:22:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:22:07,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:22:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:07,335 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:22:07,336 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 00:22:07,337 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 [2020-12-23 00:22:07,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 00:22:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-12-23 00:22:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:22:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-23 00:22:07,350 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2020-12-23 00:22:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:07,351 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-23 00:22:07,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:22:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-23 00:22:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 00:22:07,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:07,355 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, 1] [2020-12-23 00:22:07,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:22:07,561 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:07,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:07,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1925905852, now seen corresponding path program 1 times [2020-12-23 00:22:07,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:07,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934019658] [2020-12-23 00:22:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:22:07,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934019658] [2020-12-23 00:22:07,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742477910] [2020-12-23 00:22:07,668 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 [2020-12-23 00:22:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:07,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:22:07,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:22:07,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:22:07,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:22:07,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201915581] [2020-12-23 00:22:07,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:22:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:07,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:22:07,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:22:07,882 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 3 states. [2020-12-23 00:22:07,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:07,914 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 00:22:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:22:07,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-12-23 00:22:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:07,916 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:22:07,916 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:22:07,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:22:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:22:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 00:22:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:22:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-12-23 00:22:07,924 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2020-12-23 00:22:07,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:07,925 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-12-23 00:22:07,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:22:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-12-23 00:22:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:22:07,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:07,926 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, 1, 1, 1] [2020-12-23 00:22:08,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:08,132 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:08,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1542894914, now seen corresponding path program 1 times [2020-12-23 00:22:08,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:08,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406936870] [2020-12-23 00:22:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:22:08,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406936870] [2020-12-23 00:22:08,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755761507] [2020-12-23 00:22:08,214 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 [2020-12-23 00:22:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:22:08,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:22:08,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:08,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:22:08,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432724939] [2020-12-23 00:22:08,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:22:08,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:08,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:22:08,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:22:08,418 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-12-23 00:22:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:08,449 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2020-12-23 00:22:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:22:08,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-23 00:22:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:08,451 INFO L225 Difference]: With dead ends: 66 [2020-12-23 00:22:08,451 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 00:22:08,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:22:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 00:22:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-23 00:22:08,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:22:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-23 00:22:08,459 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 33 [2020-12-23 00:22:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:08,459 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-23 00:22:08,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:22:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-23 00:22:08,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:22:08,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:08,461 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, 1, 1, 1] [2020-12-23 00:22:08,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:08,676 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:08,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:08,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1235585152, now seen corresponding path program 2 times [2020-12-23 00:22:08,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:08,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388505836] [2020-12-23 00:22:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:22:08,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388505836] [2020-12-23 00:22:08,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424416244] [2020-12-23 00:22:08,786 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 [2020-12-23 00:22:08,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:08,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:08,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:22:08,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:22:08,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:08,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:22:08,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904391362] [2020-12-23 00:22:08,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:22:08,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:08,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:22:08,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:22:08,973 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 7 states. [2020-12-23 00:22:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:09,113 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2020-12-23 00:22:09,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:22:09,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-23 00:22:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:09,119 INFO L225 Difference]: With dead ends: 89 [2020-12-23 00:22:09,119 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:22:09,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:22:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:22:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-12-23 00:22:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 00:22:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-23 00:22:09,144 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 35 [2020-12-23 00:22:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:09,144 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-23 00:22:09,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:22:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-23 00:22:09,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:22:09,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:09,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:09,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:09,352 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:09,353 INFO L82 PathProgramCache]: Analyzing trace with hash 145959385, now seen corresponding path program 3 times [2020-12-23 00:22:09,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:09,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582513969] [2020-12-23 00:22:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:22:09,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582513969] [2020-12-23 00:22:09,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339651300] [2020-12-23 00:22:09,445 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 [2020-12-23 00:22:09,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:22:09,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:09,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:22:09,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:22:09,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:09,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:22:09,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069567518] [2020-12-23 00:22:09,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:22:09,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:09,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:22:09,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:22:09,616 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 5 states. [2020-12-23 00:22:09,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:09,638 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-12-23 00:22:09,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:22:09,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-12-23 00:22:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:09,640 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:22:09,640 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 00:22:09,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:22:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 00:22:09,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-23 00:22:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:22:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-12-23 00:22:09,648 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2020-12-23 00:22:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:09,648 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-12-23 00:22:09,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:22:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-12-23 00:22:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:22:09,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:09,650 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:09,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 00:22:09,866 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash -523940009, now seen corresponding path program 4 times [2020-12-23 00:22:09,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:09,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19321832] [2020-12-23 00:22:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:22:09,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19321832] [2020-12-23 00:22:09,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630758046] [2020-12-23 00:22:09,964 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 [2020-12-23 00:22:10,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:22:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:10,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:22:10,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:22:10,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:10,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:22:10,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035541964] [2020-12-23 00:22:10,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:22:10,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:10,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:22:10,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:22:10,119 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2020-12-23 00:22:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:10,144 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-12-23 00:22:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:22:10,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-12-23 00:22:10,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:10,145 INFO L225 Difference]: With dead ends: 98 [2020-12-23 00:22:10,145 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 00:22:10,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:22:10,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 00:22:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-23 00:22:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:22:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-23 00:22:10,152 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 51 [2020-12-23 00:22:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:10,152 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-23 00:22:10,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:22:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-23 00:22:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 00:22:10,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:10,156 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:10,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:10,367 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:10,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1019809557, now seen corresponding path program 5 times [2020-12-23 00:22:10,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:10,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714404133] [2020-12-23 00:22:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:22:10,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714404133] [2020-12-23 00:22:10,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418000615] [2020-12-23 00:22:10,531 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 [2020-12-23 00:22:10,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:22:10,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:22:10,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 00:22:10,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:10,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-23 00:22:10,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477285189] [2020-12-23 00:22:10,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:22:10,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:10,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:22:10,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:22:10,740 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 10 states. [2020-12-23 00:22:10,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:10,794 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2020-12-23 00:22:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:22:10,795 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-12-23 00:22:10,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:10,796 INFO L225 Difference]: With dead ends: 103 [2020-12-23 00:22:10,796 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:22:10,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:22:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:22:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-12-23 00:22:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 00:22:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-12-23 00:22:10,816 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 53 [2020-12-23 00:22:10,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:10,818 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-12-23 00:22:10,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:22:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-12-23 00:22:10,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:22:10,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:10,824 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:11,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:11,041 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:11,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:11,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1753708975, now seen corresponding path program 6 times [2020-12-23 00:22:11,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:11,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330237768] [2020-12-23 00:22:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 00:22:11,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330237768] [2020-12-23 00:22:11,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715161598] [2020-12-23 00:22:11,150 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 [2020-12-23 00:22:11,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:22:11,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:11,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:22:11,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 00:22:11,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:11,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-23 00:22:11,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802766521] [2020-12-23 00:22:11,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:22:11,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:11,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:22:11,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:22:11,438 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 11 states. [2020-12-23 00:22:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:11,584 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2020-12-23 00:22:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:22:11,584 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-12-23 00:22:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:11,585 INFO L225 Difference]: With dead ends: 127 [2020-12-23 00:22:11,585 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 00:22:11,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:22:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 00:22:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-12-23 00:22:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:22:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-12-23 00:22:11,600 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 57 [2020-12-23 00:22:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:11,601 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-12-23 00:22:11,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:22:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-12-23 00:22:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:22:11,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:11,602 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2020-12-23 00:22:11,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:22:11,817 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:11,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1901797290, now seen corresponding path program 7 times [2020-12-23 00:22:11,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:11,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291335081] [2020-12-23 00:22:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 00:22:11,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291335081] [2020-12-23 00:22:11,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491040929] [2020-12-23 00:22:11,976 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 [2020-12-23 00:22:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:12,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:22:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 00:22:12,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:12,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:22:12,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429991389] [2020-12-23 00:22:12,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:22:12,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:12,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:22:12,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:22:12,168 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 10 states. [2020-12-23 00:22:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:12,200 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-12-23 00:22:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:22:12,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-12-23 00:22:12,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:12,202 INFO L225 Difference]: With dead ends: 132 [2020-12-23 00:22:12,202 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:22:12,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:22:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:22:12,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-23 00:22:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 00:22:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-12-23 00:22:12,208 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 71 [2020-12-23 00:22:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:12,208 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-12-23 00:22:12,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:22:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-12-23 00:22:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:22:12,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:12,209 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 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] [2020-12-23 00:22:12,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:12,423 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:12,424 INFO L82 PathProgramCache]: Analyzing trace with hash 646943848, now seen corresponding path program 8 times [2020-12-23 00:22:12,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:12,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281848294] [2020-12-23 00:22:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 00:22:12,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281848294] [2020-12-23 00:22:12,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506604075] [2020-12-23 00:22:12,587 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 [2020-12-23 00:22:12,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:12,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:12,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:22:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 00:22:12,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:12,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:22:12,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050739294] [2020-12-23 00:22:12,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:22:12,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:12,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:22:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:22:12,774 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 11 states. [2020-12-23 00:22:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:12,810 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2020-12-23 00:22:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:22:12,810 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-12-23 00:22:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:12,811 INFO L225 Difference]: With dead ends: 134 [2020-12-23 00:22:12,811 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 00:22:12,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:22:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 00:22:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-23 00:22:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:22:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2020-12-23 00:22:12,816 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 73 [2020-12-23 00:22:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:12,817 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2020-12-23 00:22:12,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:22:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2020-12-23 00:22:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:22:12,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:12,818 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 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] [2020-12-23 00:22:13,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:13,032 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1618596262, now seen corresponding path program 9 times [2020-12-23 00:22:13,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:13,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46942574] [2020-12-23 00:22:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-23 00:22:13,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46942574] [2020-12-23 00:22:13,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066218515] [2020-12-23 00:22:13,172 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 [2020-12-23 00:22:13,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:22:13,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:13,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:22:13,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-23 00:22:13,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:13,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 00:22:13,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404415914] [2020-12-23 00:22:13,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:22:13,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:13,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:22:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:22:13,713 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 15 states. [2020-12-23 00:22:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:13,908 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2020-12-23 00:22:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:22:13,908 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-12-23 00:22:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:13,909 INFO L225 Difference]: With dead ends: 157 [2020-12-23 00:22:13,909 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 00:22:13,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:22:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 00:22:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-12-23 00:22:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:22:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2020-12-23 00:22:13,915 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 75 [2020-12-23 00:22:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:13,915 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2020-12-23 00:22:13,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:22:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2020-12-23 00:22:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:22:13,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:13,916 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 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] [2020-12-23 00:22:14,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:22:14,132 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash 92897279, now seen corresponding path program 10 times [2020-12-23 00:22:14,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:14,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384930191] [2020-12-23 00:22:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-23 00:22:14,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384930191] [2020-12-23 00:22:14,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799925496] [2020-12-23 00:22:14,313 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 [2020-12-23 00:22:14,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:22:14,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:14,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:22:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-23 00:22:14,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:14,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:22:14,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656710681] [2020-12-23 00:22:14,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:22:14,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:14,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:22:14,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:22:14,563 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 13 states. [2020-12-23 00:22:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:14,604 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2020-12-23 00:22:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:22:14,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-12-23 00:22:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:14,609 INFO L225 Difference]: With dead ends: 162 [2020-12-23 00:22:14,609 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:22:14,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:22:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:22:14,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:22:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:22:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-12-23 00:22:14,614 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 89 [2020-12-23 00:22:14,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:14,614 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-12-23 00:22:14,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:22:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-12-23 00:22:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:22:14,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:14,616 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 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] [2020-12-23 00:22:14,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:22:14,831 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:14,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:14,832 INFO L82 PathProgramCache]: Analyzing trace with hash 779977021, now seen corresponding path program 11 times [2020-12-23 00:22:14,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:14,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917688164] [2020-12-23 00:22:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-23 00:22:14,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917688164] [2020-12-23 00:22:14,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861440918] [2020-12-23 00:22:14,976 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 [2020-12-23 00:22:15,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:22:15,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:22:15,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-23 00:22:15,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:15,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2020-12-23 00:22:15,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002768724] [2020-12-23 00:22:15,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:22:15,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:22:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:22:15,491 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 17 states. [2020-12-23 00:22:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:15,577 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2020-12-23 00:22:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:22:15,579 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-12-23 00:22:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:15,580 INFO L225 Difference]: With dead ends: 167 [2020-12-23 00:22:15,581 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 00:22:15,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:22:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 00:22:15,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-12-23 00:22:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:22:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2020-12-23 00:22:15,587 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 91 [2020-12-23 00:22:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:15,587 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2020-12-23 00:22:15,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:22:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2020-12-23 00:22:15,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 00:22:15,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:15,588 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:15,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:22:15,801 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:15,802 INFO L82 PathProgramCache]: Analyzing trace with hash -105056391, now seen corresponding path program 12 times [2020-12-23 00:22:15,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:15,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946024164] [2020-12-23 00:22:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:22:16,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946024164] [2020-12-23 00:22:16,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584236063] [2020-12-23 00:22:16,006 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 [2020-12-23 00:22:16,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:22:16,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:16,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:22:16,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2020-12-23 00:22:16,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:16,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-12-23 00:22:16,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045747331] [2020-12-23 00:22:16,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:22:16,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:22:16,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:22:16,986 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 19 states. [2020-12-23 00:22:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:17,093 INFO L93 Difference]: Finished difference Result 173 states and 206 transitions. [2020-12-23 00:22:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:22:17,094 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2020-12-23 00:22:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:17,095 INFO L225 Difference]: With dead ends: 173 [2020-12-23 00:22:17,095 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 00:22:17,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:22:17,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 00:22:17,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-12-23 00:22:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:22:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-12-23 00:22:17,101 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 95 [2020-12-23 00:22:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:17,101 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-12-23 00:22:17,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:22:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-12-23 00:22:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:22:17,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:17,103 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:17,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:17,317 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:17,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1954054069, now seen corresponding path program 13 times [2020-12-23 00:22:17,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:17,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115722389] [2020-12-23 00:22:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 00:22:17,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115722389] [2020-12-23 00:22:17,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996951770] [2020-12-23 00:22:17,496 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 [2020-12-23 00:22:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:17,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:22:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 00:22:17,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:17,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:22:17,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941716967] [2020-12-23 00:22:17,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:22:17,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:17,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:22:17,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:22:17,734 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 16 states. [2020-12-23 00:22:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:17,789 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2020-12-23 00:22:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:22:17,790 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-12-23 00:22:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:17,792 INFO L225 Difference]: With dead ends: 176 [2020-12-23 00:22:17,792 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 00:22:17,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:22:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 00:22:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-23 00:22:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:22:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2020-12-23 00:22:17,802 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 99 [2020-12-23 00:22:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:17,803 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2020-12-23 00:22:17,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:22:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2020-12-23 00:22:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:22:17,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:17,807 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:18,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:22:18,022 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:18,023 INFO L82 PathProgramCache]: Analyzing trace with hash -259880077, now seen corresponding path program 14 times [2020-12-23 00:22:18,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:18,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987636009] [2020-12-23 00:22:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 00:22:18,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987636009] [2020-12-23 00:22:18,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408589407] [2020-12-23 00:22:18,271 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 [2020-12-23 00:22:18,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:18,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:18,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:22:18,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 00:22:18,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:18,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:22:18,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844654831] [2020-12-23 00:22:18,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:22:18,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:18,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:22:18,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:22:18,500 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 17 states. [2020-12-23 00:22:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:18,552 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2020-12-23 00:22:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:22:18,552 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-12-23 00:22:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:18,553 INFO L225 Difference]: With dead ends: 178 [2020-12-23 00:22:18,553 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 00:22:18,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:22:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 00:22:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-23 00:22:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:22:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-12-23 00:22:18,558 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 101 [2020-12-23 00:22:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:18,558 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-12-23 00:22:18,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:22:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-12-23 00:22:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 00:22:18,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:18,560 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:18,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:22:18,775 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:18,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1841782863, now seen corresponding path program 15 times [2020-12-23 00:22:18,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:18,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982380849] [2020-12-23 00:22:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 00:22:18,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982380849] [2020-12-23 00:22:18,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686714760] [2020-12-23 00:22:18,992 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 [2020-12-23 00:22:19,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:22:19,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:19,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:22:19,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-12-23 00:22:19,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:19,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-23 00:22:19,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986975968] [2020-12-23 00:22:19,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:22:19,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:19,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:22:19,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:22:19,560 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 22 states. [2020-12-23 00:22:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:19,773 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2020-12-23 00:22:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:22:19,774 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-12-23 00:22:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:19,774 INFO L225 Difference]: With dead ends: 201 [2020-12-23 00:22:19,775 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 00:22:19,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:22:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 00:22:19,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2020-12-23 00:22:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 00:22:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2020-12-23 00:22:19,780 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 103 [2020-12-23 00:22:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:19,780 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2020-12-23 00:22:19,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:22:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2020-12-23 00:22:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 00:22:19,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:19,782 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 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] [2020-12-23 00:22:19,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:19,996 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:19,997 INFO L82 PathProgramCache]: Analyzing trace with hash 868849802, now seen corresponding path program 16 times [2020-12-23 00:22:19,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:19,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523961532] [2020-12-23 00:22:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 00:22:20,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523961532] [2020-12-23 00:22:20,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783392005] [2020-12-23 00:22:20,235 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 [2020-12-23 00:22:20,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:22:20,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:20,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:22:20,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 00:22:20,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:20,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:22:20,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536440257] [2020-12-23 00:22:20,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:22:20,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:20,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:22:20,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:22:20,518 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand 19 states. [2020-12-23 00:22:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:20,584 INFO L93 Difference]: Finished difference Result 206 states and 244 transitions. [2020-12-23 00:22:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:22:20,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 117 [2020-12-23 00:22:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:20,586 INFO L225 Difference]: With dead ends: 206 [2020-12-23 00:22:20,586 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 00:22:20,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:22:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 00:22:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-12-23 00:22:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:22:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2020-12-23 00:22:20,594 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 117 [2020-12-23 00:22:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:20,595 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2020-12-23 00:22:20,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:22:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2020-12-23 00:22:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:22:20,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:20,596 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 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] [2020-12-23 00:22:20,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:20,810 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2012967112, now seen corresponding path program 17 times [2020-12-23 00:22:20,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:20,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480299373] [2020-12-23 00:22:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 00:22:21,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480299373] [2020-12-23 00:22:21,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692793412] [2020-12-23 00:22:21,096 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 [2020-12-23 00:22:21,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 00:22:21,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:21,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:22:21,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 00:22:21,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:21,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:22:21,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086226378] [2020-12-23 00:22:21,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:22:21,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:21,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:22:21,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:22:21,855 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 20 states. [2020-12-23 00:22:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:21,929 INFO L93 Difference]: Finished difference Result 208 states and 246 transitions. [2020-12-23 00:22:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:22:21,929 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-12-23 00:22:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:21,930 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:22:21,930 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 00:22:21,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:22:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 00:22:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-12-23 00:22:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 00:22:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2020-12-23 00:22:21,936 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 119 [2020-12-23 00:22:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:21,936 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2020-12-23 00:22:21,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:22:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2020-12-23 00:22:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 00:22:21,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:21,938 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 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] [2020-12-23 00:22:22,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:22,151 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:22,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1998074246, now seen corresponding path program 18 times [2020-12-23 00:22:22,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:22,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271707290] [2020-12-23 00:22:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-23 00:22:22,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271707290] [2020-12-23 00:22:22,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654266038] [2020-12-23 00:22:22,405 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 [2020-12-23 00:22:23,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 00:22:23,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:22:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2020-12-23 00:22:23,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:23,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-23 00:22:23,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005897421] [2020-12-23 00:22:23,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:22:23,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:23,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:22:23,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:22:23,280 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 26 states. [2020-12-23 00:22:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:23,572 INFO L93 Difference]: Finished difference Result 231 states and 278 transitions. [2020-12-23 00:22:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:22:23,576 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2020-12-23 00:22:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:23,577 INFO L225 Difference]: With dead ends: 231 [2020-12-23 00:22:23,577 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 00:22:23,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:22:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 00:22:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2020-12-23 00:22:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:22:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 158 transitions. [2020-12-23 00:22:23,583 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 158 transitions. Word has length 121 [2020-12-23 00:22:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:23,583 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 158 transitions. [2020-12-23 00:22:23,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:22:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 158 transitions. [2020-12-23 00:22:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:22:23,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:23,585 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 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] [2020-12-23 00:22:23,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:22:23,790 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:23,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:23,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1951654049, now seen corresponding path program 19 times [2020-12-23 00:22:23,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:23,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421549805] [2020-12-23 00:22:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-12-23 00:22:24,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421549805] [2020-12-23 00:22:24,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512712977] [2020-12-23 00:22:24,112 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 [2020-12-23 00:22:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:24,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:22:24,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-12-23 00:22:24,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:24,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:22:24,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803531179] [2020-12-23 00:22:24,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:22:24,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:22:24,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:22:24,404 INFO L87 Difference]: Start difference. First operand 136 states and 158 transitions. Second operand 22 states. [2020-12-23 00:22:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:24,484 INFO L93 Difference]: Finished difference Result 236 states and 280 transitions. [2020-12-23 00:22:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:22:24,487 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 135 [2020-12-23 00:22:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:24,488 INFO L225 Difference]: With dead ends: 236 [2020-12-23 00:22:24,489 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:22:24,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:22:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:22:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-12-23 00:22:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 00:22:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-12-23 00:22:24,494 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 135 [2020-12-23 00:22:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:24,494 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-12-23 00:22:24,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:22:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-12-23 00:22:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 00:22:24,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:24,496 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 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] [2020-12-23 00:22:24,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:22:24,711 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:24,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:24,712 INFO L82 PathProgramCache]: Analyzing trace with hash 391881757, now seen corresponding path program 20 times [2020-12-23 00:22:24,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:24,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970764763] [2020-12-23 00:22:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-12-23 00:22:25,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970764763] [2020-12-23 00:22:25,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162117086] [2020-12-23 00:22:25,059 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 [2020-12-23 00:22:25,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:25,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:25,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:22:25,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-12-23 00:22:25,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:25,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:22:25,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803902084] [2020-12-23 00:22:25,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:22:25,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:25,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:22:25,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:22:25,349 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 23 states. [2020-12-23 00:22:25,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:25,437 INFO L93 Difference]: Finished difference Result 237 states and 281 transitions. [2020-12-23 00:22:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:22:25,438 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 137 [2020-12-23 00:22:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:25,439 INFO L225 Difference]: With dead ends: 237 [2020-12-23 00:22:25,439 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 00:22:25,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:22:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 00:22:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-12-23 00:22:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 00:22:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2020-12-23 00:22:25,445 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 137 [2020-12-23 00:22:25,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:25,446 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2020-12-23 00:22:25,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:22:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2020-12-23 00:22:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 00:22:25,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:25,447 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 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] [2020-12-23 00:22:25,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:25,661 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:25,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1966928219, now seen corresponding path program 21 times [2020-12-23 00:22:25,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:25,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191968776] [2020-12-23 00:22:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2020-12-23 00:22:25,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191968776] [2020-12-23 00:22:25,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949538485] [2020-12-23 00:22:25,776 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 [2020-12-23 00:22:26,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:22:26,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:26,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:22:26,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2020-12-23 00:22:26,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:26,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-23 00:22:26,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947400754] [2020-12-23 00:22:26,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:22:26,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:26,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:22:26,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:22:26,433 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand 15 states. [2020-12-23 00:22:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:26,631 INFO L93 Difference]: Finished difference Result 235 states and 281 transitions. [2020-12-23 00:22:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:22:26,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 139 [2020-12-23 00:22:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:26,633 INFO L225 Difference]: With dead ends: 235 [2020-12-23 00:22:26,633 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 00:22:26,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:22:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 00:22:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 154. [2020-12-23 00:22:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 00:22:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 179 transitions. [2020-12-23 00:22:26,640 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 179 transitions. Word has length 139 [2020-12-23 00:22:26,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:26,641 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 179 transitions. [2020-12-23 00:22:26,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:22:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 179 transitions. [2020-12-23 00:22:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:22:26,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:26,643 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 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] [2020-12-23 00:22:26,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:22:26,857 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:26,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:26,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1805414284, now seen corresponding path program 22 times [2020-12-23 00:22:26,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:26,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178601004] [2020-12-23 00:22:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2020-12-23 00:22:26,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178601004] [2020-12-23 00:22:26,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497754513] [2020-12-23 00:22:26,989 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 [2020-12-23 00:22:27,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:22:27,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:27,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:22:27,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2020-12-23 00:22:27,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:27,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:22:27,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740764154] [2020-12-23 00:22:27,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:22:27,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:22:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:22:27,272 INFO L87 Difference]: Start difference. First operand 154 states and 179 transitions. Second operand 11 states. [2020-12-23 00:22:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:27,429 INFO L93 Difference]: Finished difference Result 256 states and 306 transitions. [2020-12-23 00:22:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:22:27,430 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 153 [2020-12-23 00:22:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:27,432 INFO L225 Difference]: With dead ends: 256 [2020-12-23 00:22:27,432 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 00:22:27,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:22:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 00:22:27,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2020-12-23 00:22:27,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 00:22:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 194 transitions. [2020-12-23 00:22:27,438 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 194 transitions. Word has length 153 [2020-12-23 00:22:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:27,439 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 194 transitions. [2020-12-23 00:22:27,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:22:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 194 transitions. [2020-12-23 00:22:27,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-23 00:22:27,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:27,440 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:27,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:27,655 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:27,656 INFO L82 PathProgramCache]: Analyzing trace with hash 937870095, now seen corresponding path program 23 times [2020-12-23 00:22:27,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:27,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166325786] [2020-12-23 00:22:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 00:22:27,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166325786] [2020-12-23 00:22:27,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406737680] [2020-12-23 00:22:27,797 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 [2020-12-23 00:22:29,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 00:22:29,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:22:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 00:22:29,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:29,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:22:29,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109033233] [2020-12-23 00:22:29,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:22:29,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:29,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:22:29,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:22:29,792 INFO L87 Difference]: Start difference. First operand 166 states and 194 transitions. Second operand 12 states. [2020-12-23 00:22:29,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:29,961 INFO L93 Difference]: Finished difference Result 276 states and 331 transitions. [2020-12-23 00:22:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:22:29,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 165 [2020-12-23 00:22:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:29,963 INFO L225 Difference]: With dead ends: 276 [2020-12-23 00:22:29,963 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 00:22:29,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:22:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 00:22:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 178. [2020-12-23 00:22:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 00:22:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2020-12-23 00:22:29,970 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 165 [2020-12-23 00:22:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:29,971 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2020-12-23 00:22:29,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:22:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2020-12-23 00:22:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-23 00:22:29,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:29,972 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:30,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:22:30,187 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:30,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:30,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1899633366, now seen corresponding path program 24 times [2020-12-23 00:22:30,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:30,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479442735] [2020-12-23 00:22:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2020-12-23 00:22:30,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479442735] [2020-12-23 00:22:30,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663050335] [2020-12-23 00:22:30,354 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 [2020-12-23 00:22:31,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:22:31,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:31,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:22:31,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 859 trivial. 0 not checked. [2020-12-23 00:22:31,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:31,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-12-23 00:22:31,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789755398] [2020-12-23 00:22:31,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:22:31,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:31,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:22:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:22:31,540 INFO L87 Difference]: Start difference. First operand 178 states and 209 transitions. Second operand 19 states. [2020-12-23 00:22:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:31,783 INFO L93 Difference]: Finished difference Result 299 states and 360 transitions. [2020-12-23 00:22:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:22:31,785 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 177 [2020-12-23 00:22:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:31,786 INFO L225 Difference]: With dead ends: 299 [2020-12-23 00:22:31,786 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 00:22:31,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:22:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 00:22:31,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2020-12-23 00:22:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-23 00:22:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 226 transitions. [2020-12-23 00:22:31,793 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 226 transitions. Word has length 177 [2020-12-23 00:22:31,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:31,794 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 226 transitions. [2020-12-23 00:22:31,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:22:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 226 transitions. [2020-12-23 00:22:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-23 00:22:31,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:31,795 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 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] [2020-12-23 00:22:32,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:22:32,007 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:32,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1883762499, now seen corresponding path program 25 times [2020-12-23 00:22:32,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:32,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880281732] [2020-12-23 00:22:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2020-12-23 00:22:32,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880281732] [2020-12-23 00:22:32,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739861455] [2020-12-23 00:22:32,196 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 [2020-12-23 00:22:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:32,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:22:32,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2020-12-23 00:22:32,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:32,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:22:32,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379199683] [2020-12-23 00:22:32,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:22:32,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:32,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:22:32,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:22:32,550 INFO L87 Difference]: Start difference. First operand 192 states and 226 transitions. Second operand 14 states. [2020-12-23 00:22:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:32,743 INFO L93 Difference]: Finished difference Result 320 states and 385 transitions. [2020-12-23 00:22:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:22:32,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 191 [2020-12-23 00:22:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:32,745 INFO L225 Difference]: With dead ends: 320 [2020-12-23 00:22:32,745 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 00:22:32,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:22:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 00:22:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 204. [2020-12-23 00:22:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-23 00:22:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 241 transitions. [2020-12-23 00:22:32,755 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 241 transitions. Word has length 191 [2020-12-23 00:22:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:32,755 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 241 transitions. [2020-12-23 00:22:32,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:22:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 241 transitions. [2020-12-23 00:22:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-12-23 00:22:32,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:32,757 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:32,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:22:32,971 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:32,971 INFO L82 PathProgramCache]: Analyzing trace with hash -18384546, now seen corresponding path program 26 times [2020-12-23 00:22:32,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:32,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343137999] [2020-12-23 00:22:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2020-12-23 00:22:33,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343137999] [2020-12-23 00:22:33,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704855314] [2020-12-23 00:22:33,176 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 [2020-12-23 00:22:33,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:33,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:33,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:22:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2020-12-23 00:22:33,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:33,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:22:33,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705629859] [2020-12-23 00:22:33,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:22:33,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:33,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:22:33,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:22:33,560 INFO L87 Difference]: Start difference. First operand 204 states and 241 transitions. Second operand 15 states. [2020-12-23 00:22:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:33,785 INFO L93 Difference]: Finished difference Result 340 states and 410 transitions. [2020-12-23 00:22:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:22:33,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 203 [2020-12-23 00:22:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:33,788 INFO L225 Difference]: With dead ends: 340 [2020-12-23 00:22:33,788 INFO L226 Difference]: Without dead ends: 225 [2020-12-23 00:22:33,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:22:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-23 00:22:33,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 216. [2020-12-23 00:22:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-12-23 00:22:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 256 transitions. [2020-12-23 00:22:33,796 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 256 transitions. Word has length 203 [2020-12-23 00:22:33,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:33,796 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 256 transitions. [2020-12-23 00:22:33,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:22:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 256 transitions. [2020-12-23 00:22:33,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-23 00:22:33,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:33,798 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:34,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:34,013 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1306292985, now seen corresponding path program 27 times [2020-12-23 00:22:34,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:34,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638414041] [2020-12-23 00:22:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-12-23 00:22:34,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638414041] [2020-12-23 00:22:34,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159090400] [2020-12-23 00:22:34,226 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 [2020-12-23 00:22:34,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:22:34,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:22:34,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:34,691 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:22:34,692 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:22:34,697 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:22:34,700 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:22:34,700 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-23 00:22:34,990 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:22:34,990 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2020-12-23 00:22:34,993 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:22:35,001 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:22:35,002 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:22:35,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:18 [2020-12-23 00:22:35,117 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:22:35,118 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2020-12-23 00:22:35,120 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:22:35,122 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:22:35,123 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:22:35,123 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2020-12-23 00:22:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 64 proven. 68 refuted. 0 times theorem prover too weak. 1145 trivial. 0 not checked. [2020-12-23 00:22:35,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:35,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2020-12-23 00:22:35,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678970811] [2020-12-23 00:22:35,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:22:35,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:35,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:22:35,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:22:35,313 INFO L87 Difference]: Start difference. First operand 216 states and 256 transitions. Second operand 27 states. [2020-12-23 00:22:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:36,814 INFO L93 Difference]: Finished difference Result 544 states and 665 transitions. [2020-12-23 00:22:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:22:36,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 215 [2020-12-23 00:22:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:36,818 INFO L225 Difference]: With dead ends: 544 [2020-12-23 00:22:36,818 INFO L226 Difference]: Without dead ends: 421 [2020-12-23 00:22:36,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=969, Invalid=2337, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 00:22:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-12-23 00:22:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 287. [2020-12-23 00:22:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 00:22:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 344 transitions. [2020-12-23 00:22:36,834 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 344 transitions. Word has length 215 [2020-12-23 00:22:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:36,834 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 344 transitions. [2020-12-23 00:22:36,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:22:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 344 transitions. [2020-12-23 00:22:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-12-23 00:22:36,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:36,836 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:37,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 00:22:37,049 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1166353814, now seen corresponding path program 1 times [2020-12-23 00:22:37,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:37,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454396921] [2020-12-23 00:22:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1099 trivial. 0 not checked. [2020-12-23 00:22:37,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454396921] [2020-12-23 00:22:37,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005381296] [2020-12-23 00:22:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 00:22:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:37,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:22:37,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1099 trivial. 0 not checked. [2020-12-23 00:22:37,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:37,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:22:37,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825906651] [2020-12-23 00:22:37,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:22:37,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:22:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:22:37,910 INFO L87 Difference]: Start difference. First operand 287 states and 344 transitions. Second operand 17 states. [2020-12-23 00:22:38,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:38,194 INFO L93 Difference]: Finished difference Result 454 states and 552 transitions. [2020-12-23 00:22:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:22:38,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 227 [2020-12-23 00:22:38,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:38,196 INFO L225 Difference]: With dead ends: 454 [2020-12-23 00:22:38,196 INFO L226 Difference]: Without dead ends: 315 [2020-12-23 00:22:38,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:22:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-23 00:22:38,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 303. [2020-12-23 00:22:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-12-23 00:22:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 364 transitions. [2020-12-23 00:22:38,208 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 364 transitions. Word has length 227 [2020-12-23 00:22:38,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:38,208 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 364 transitions. [2020-12-23 00:22:38,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:22:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 364 transitions. [2020-12-23 00:22:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-23 00:22:38,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:38,210 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:38,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:22:38,423 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1445698609, now seen corresponding path program 2 times [2020-12-23 00:22:38,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:38,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949291764] [2020-12-23 00:22:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1583 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1205 trivial. 0 not checked. [2020-12-23 00:22:38,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949291764] [2020-12-23 00:22:38,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134899892] [2020-12-23 00:22:38,704 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 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 [2020-12-23 00:22:38,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:38,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:38,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:22:38,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1583 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1205 trivial. 0 not checked. [2020-12-23 00:22:39,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:39,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:22:39,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840289239] [2020-12-23 00:22:39,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:22:39,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:39,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:22:39,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:22:39,136 INFO L87 Difference]: Start difference. First operand 303 states and 364 transitions. Second operand 18 states. [2020-12-23 00:22:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:39,414 INFO L93 Difference]: Finished difference Result 478 states and 582 transitions. [2020-12-23 00:22:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:22:39,414 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 239 [2020-12-23 00:22:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:39,416 INFO L225 Difference]: With dead ends: 478 [2020-12-23 00:22:39,417 INFO L226 Difference]: Without dead ends: 331 [2020-12-23 00:22:39,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:22:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-23 00:22:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 319. [2020-12-23 00:22:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-23 00:22:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 384 transitions. [2020-12-23 00:22:39,430 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 384 transitions. Word has length 239 [2020-12-23 00:22:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:39,430 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 384 transitions. [2020-12-23 00:22:39,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:22:39,430 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 384 transitions. [2020-12-23 00:22:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-23 00:22:39,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:39,432 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:39,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:22:39,647 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:39,648 INFO L82 PathProgramCache]: Analyzing trace with hash 562610764, now seen corresponding path program 3 times [2020-12-23 00:22:39,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:39,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102974285] [2020-12-23 00:22:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1754 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1319 trivial. 0 not checked. [2020-12-23 00:22:39,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102974285] [2020-12-23 00:22:39,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312980059] [2020-12-23 00:22:39,965 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 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 [2020-12-23 00:22:40,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:22:40,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:22:40,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1754 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2020-12-23 00:22:40,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:40,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2020-12-23 00:22:40,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245600755] [2020-12-23 00:22:40,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:22:40,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:40,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:22:40,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:22:40,796 INFO L87 Difference]: Start difference. First operand 319 states and 384 transitions. Second operand 26 states. [2020-12-23 00:22:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:41,185 INFO L93 Difference]: Finished difference Result 505 states and 616 transitions. [2020-12-23 00:22:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:22:41,185 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 251 [2020-12-23 00:22:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:41,188 INFO L225 Difference]: With dead ends: 505 [2020-12-23 00:22:41,188 INFO L226 Difference]: Without dead ends: 350 [2020-12-23 00:22:41,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:22:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-12-23 00:22:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 337. [2020-12-23 00:22:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-12-23 00:22:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 406 transitions. [2020-12-23 00:22:41,201 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 406 transitions. Word has length 251 [2020-12-23 00:22:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:41,202 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 406 transitions. [2020-12-23 00:22:41,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:22:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 406 transitions. [2020-12-23 00:22:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-12-23 00:22:41,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:41,204 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:41,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:22:41,418 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:41,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1429767781, now seen corresponding path program 4 times [2020-12-23 00:22:41,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:41,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683878850] [2020-12-23 00:22:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1456 trivial. 0 not checked. [2020-12-23 00:22:41,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683878850] [2020-12-23 00:22:41,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391586395] [2020-12-23 00:22:41,785 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 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 [2020-12-23 00:22:42,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:22:42,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:42,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:22:42,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1456 trivial. 0 not checked. [2020-12-23 00:22:42,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:42,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:22:42,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139761663] [2020-12-23 00:22:42,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:22:42,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:42,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:22:42,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:22:42,263 INFO L87 Difference]: Start difference. First operand 337 states and 406 transitions. Second operand 20 states. [2020-12-23 00:22:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:42,579 INFO L93 Difference]: Finished difference Result 530 states and 646 transitions. [2020-12-23 00:22:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:22:42,587 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 265 [2020-12-23 00:22:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:42,589 INFO L225 Difference]: With dead ends: 530 [2020-12-23 00:22:42,589 INFO L226 Difference]: Without dead ends: 365 [2020-12-23 00:22:42,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:22:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-12-23 00:22:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 353. [2020-12-23 00:22:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-12-23 00:22:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 426 transitions. [2020-12-23 00:22:42,614 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 426 transitions. Word has length 265 [2020-12-23 00:22:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:42,615 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 426 transitions. [2020-12-23 00:22:42,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:22:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 426 transitions. [2020-12-23 00:22:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-12-23 00:22:42,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:42,617 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:42,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:22:42,830 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:42,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1246014336, now seen corresponding path program 5 times [2020-12-23 00:22:42,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:42,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728657985] [2020-12-23 00:22:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1586 trivial. 0 not checked. [2020-12-23 00:22:43,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728657985] [2020-12-23 00:22:43,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884609954] [2020-12-23 00:22:43,189 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 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 [2020-12-23 00:22:48,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 00:22:48,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:48,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:22:48,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2083 trivial. 0 not checked. [2020-12-23 00:22:49,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:49,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2020-12-23 00:22:49,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852571475] [2020-12-23 00:22:49,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:22:49,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:49,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:22:49,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:22:49,176 INFO L87 Difference]: Start difference. First operand 353 states and 426 transitions. Second operand 29 states. [2020-12-23 00:22:49,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:49,626 INFO L93 Difference]: Finished difference Result 557 states and 680 transitions. [2020-12-23 00:22:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:22:49,627 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 277 [2020-12-23 00:22:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:49,629 INFO L225 Difference]: With dead ends: 557 [2020-12-23 00:22:49,629 INFO L226 Difference]: Without dead ends: 384 [2020-12-23 00:22:49,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:22:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-12-23 00:22:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 371. [2020-12-23 00:22:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-12-23 00:22:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 448 transitions. [2020-12-23 00:22:49,643 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 448 transitions. Word has length 277 [2020-12-23 00:22:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:49,644 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 448 transitions. [2020-12-23 00:22:49,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:22:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 448 transitions. [2020-12-23 00:22:49,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-12-23 00:22:49,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:49,647 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:49,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 00:22:49,860 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash -6771943, now seen corresponding path program 6 times [2020-12-23 00:22:49,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:49,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477838386] [2020-12-23 00:22:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2371 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1741 trivial. 0 not checked. [2020-12-23 00:22:50,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477838386] [2020-12-23 00:22:50,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420858335] [2020-12-23 00:22:50,263 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 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 [2020-12-23 00:22:54,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:22:54,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:54,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:22:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2371 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2290 trivial. 0 not checked. [2020-12-23 00:22:54,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:54,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2020-12-23 00:22:54,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673210204] [2020-12-23 00:22:54,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:22:54,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:54,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:22:54,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:22:54,706 INFO L87 Difference]: Start difference. First operand 371 states and 448 transitions. Second operand 31 states. [2020-12-23 00:22:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:55,201 INFO L93 Difference]: Finished difference Result 585 states and 714 transitions. [2020-12-23 00:22:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:22:55,202 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 291 [2020-12-23 00:22:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:55,205 INFO L225 Difference]: With dead ends: 585 [2020-12-23 00:22:55,205 INFO L226 Difference]: Without dead ends: 402 [2020-12-23 00:22:55,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:22:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-23 00:22:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 389. [2020-12-23 00:22:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-12-23 00:22:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 470 transitions. [2020-12-23 00:22:55,225 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 470 transitions. Word has length 291 [2020-12-23 00:22:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:55,225 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 470 transitions. [2020-12-23 00:22:55,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:22:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 470 transitions. [2020-12-23 00:22:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-12-23 00:22:55,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:55,229 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:55,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:22:55,438 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:55,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:55,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1532230578, now seen corresponding path program 7 times [2020-12-23 00:22:55,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:55,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857801291] [2020-12-23 00:22:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 1906 trivial. 0 not checked. [2020-12-23 00:22:55,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857801291] [2020-12-23 00:22:55,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684877123] [2020-12-23 00:22:55,911 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 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 [2020-12-23 00:22:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:56,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:22:56,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 1906 trivial. 0 not checked. [2020-12-23 00:22:56,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:56,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:22:56,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5094904] [2020-12-23 00:22:56,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:22:56,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:56,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:22:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:22:56,470 INFO L87 Difference]: Start difference. First operand 389 states and 470 transitions. Second operand 23 states. [2020-12-23 00:22:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:56,864 INFO L93 Difference]: Finished difference Result 598 states and 728 transitions. [2020-12-23 00:22:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:22:56,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 305 [2020-12-23 00:22:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:56,867 INFO L225 Difference]: With dead ends: 598 [2020-12-23 00:22:56,867 INFO L226 Difference]: Without dead ends: 405 [2020-12-23 00:22:56,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:22:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-12-23 00:22:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 405. [2020-12-23 00:22:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-12-23 00:22:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 490 transitions. [2020-12-23 00:22:56,882 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 490 transitions. Word has length 305 [2020-12-23 00:22:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:56,883 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 490 transitions. [2020-12-23 00:22:56,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:22:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 490 transitions. [2020-12-23 00:22:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-12-23 00:22:56,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:56,886 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:57,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:22:57,100 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1045730739, now seen corresponding path program 8 times [2020-12-23 00:22:57,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:57,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197713754] [2020-12-23 00:22:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2840 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:22:57,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197713754] [2020-12-23 00:22:57,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596452953] [2020-12-23 00:22:57,422 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 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 [2020-12-23 00:22:57,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:22:57,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:22:57,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:22:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:22:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2840 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:22:57,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:22:57,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:22:57,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053237522] [2020-12-23 00:22:57,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:22:57,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:22:57,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:22:57,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:22:57,996 INFO L87 Difference]: Start difference. First operand 405 states and 490 transitions. Second operand 14 states. [2020-12-23 00:22:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:22:58,062 INFO L93 Difference]: Finished difference Result 495 states and 601 transitions. [2020-12-23 00:22:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:22:58,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 317 [2020-12-23 00:22:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:22:58,065 INFO L225 Difference]: With dead ends: 495 [2020-12-23 00:22:58,066 INFO L226 Difference]: Without dead ends: 408 [2020-12-23 00:22:58,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:22:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-12-23 00:22:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 407. [2020-12-23 00:22:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-12-23 00:22:58,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 492 transitions. [2020-12-23 00:22:58,079 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 492 transitions. Word has length 317 [2020-12-23 00:22:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:22:58,080 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 492 transitions. [2020-12-23 00:22:58,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:22:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 492 transitions. [2020-12-23 00:22:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-12-23 00:22:58,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:22:58,082 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:22:58,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:22:58,296 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:22:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:22:58,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1246435765, now seen corresponding path program 9 times [2020-12-23 00:22:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:22:58,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484111033] [2020-12-23 00:22:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:22:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:22:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2861 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:22:58,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484111033] [2020-12-23 00:22:58,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902459292] [2020-12-23 00:22:58,600 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 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 [2020-12-23 00:23:00,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 00:23:00,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:23:00,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:23:00,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:23:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2861 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:00,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:23:00,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:23:00,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328424653] [2020-12-23 00:23:00,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:23:00,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:23:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:23:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:23:00,788 INFO L87 Difference]: Start difference. First operand 407 states and 492 transitions. Second operand 15 states. [2020-12-23 00:23:00,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:23:00,854 INFO L93 Difference]: Finished difference Result 497 states and 603 transitions. [2020-12-23 00:23:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:23:00,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 319 [2020-12-23 00:23:00,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:23:00,857 INFO L225 Difference]: With dead ends: 497 [2020-12-23 00:23:00,858 INFO L226 Difference]: Without dead ends: 410 [2020-12-23 00:23:00,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:23:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-12-23 00:23:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 409. [2020-12-23 00:23:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-12-23 00:23:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 494 transitions. [2020-12-23 00:23:00,873 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 494 transitions. Word has length 319 [2020-12-23 00:23:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:23:00,873 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 494 transitions. [2020-12-23 00:23:00,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:23:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 494 transitions. [2020-12-23 00:23:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-12-23 00:23:00,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:23:00,876 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:23:01,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:23:01,092 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:23:01,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:23:01,093 INFO L82 PathProgramCache]: Analyzing trace with hash -850437431, now seen corresponding path program 10 times [2020-12-23 00:23:01,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:23:01,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937067048] [2020-12-23 00:23:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:23:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:23:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:01,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937067048] [2020-12-23 00:23:01,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978866910] [2020-12-23 00:23:01,474 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 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 [2020-12-23 00:23:01,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:23:01,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:23:01,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:23:01,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:23:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:02,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:23:02,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:23:02,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630082469] [2020-12-23 00:23:02,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:23:02,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:23:02,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:23:02,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:23:02,055 INFO L87 Difference]: Start difference. First operand 409 states and 494 transitions. Second operand 16 states. [2020-12-23 00:23:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:23:02,131 INFO L93 Difference]: Finished difference Result 499 states and 605 transitions. [2020-12-23 00:23:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:23:02,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 321 [2020-12-23 00:23:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:23:02,134 INFO L225 Difference]: With dead ends: 499 [2020-12-23 00:23:02,134 INFO L226 Difference]: Without dead ends: 412 [2020-12-23 00:23:02,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:23:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-12-23 00:23:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 411. [2020-12-23 00:23:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-23 00:23:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 496 transitions. [2020-12-23 00:23:02,148 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 496 transitions. Word has length 321 [2020-12-23 00:23:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:23:02,149 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 496 transitions. [2020-12-23 00:23:02,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:23:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 496 transitions. [2020-12-23 00:23:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-12-23 00:23:02,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:23:02,152 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:23:02,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:23:02,366 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:23:02,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:23:02,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1746839495, now seen corresponding path program 11 times [2020-12-23 00:23:02,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:23:02,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893205172] [2020-12-23 00:23:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:23:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:23:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2909 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:02,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893205172] [2020-12-23 00:23:02,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582240673] [2020-12-23 00:23:02,728 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 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 [2020-12-23 00:23:11,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 00:23:11,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:23:11,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:23:11,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:23:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2909 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:12,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:23:12,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:23:12,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370323117] [2020-12-23 00:23:12,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:23:12,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:23:12,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:23:12,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:23:12,242 INFO L87 Difference]: Start difference. First operand 411 states and 496 transitions. Second operand 17 states. [2020-12-23 00:23:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:23:12,336 INFO L93 Difference]: Finished difference Result 501 states and 607 transitions. [2020-12-23 00:23:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:23:12,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 323 [2020-12-23 00:23:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:23:12,340 INFO L225 Difference]: With dead ends: 501 [2020-12-23 00:23:12,340 INFO L226 Difference]: Without dead ends: 414 [2020-12-23 00:23:12,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:23:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-23 00:23:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 413. [2020-12-23 00:23:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-12-23 00:23:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 498 transitions. [2020-12-23 00:23:12,356 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 498 transitions. Word has length 323 [2020-12-23 00:23:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:23:12,357 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 498 transitions. [2020-12-23 00:23:12,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:23:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 498 transitions. [2020-12-23 00:23:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-12-23 00:23:12,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:23:12,360 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:23:12,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:23:12,574 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:23:12,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:23:12,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1941000891, now seen corresponding path program 12 times [2020-12-23 00:23:12,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:23:12,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447475045] [2020-12-23 00:23:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:23:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:23:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2936 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447475045] [2020-12-23 00:23:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881559470] [2020-12-23 00:23:12,927 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 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 [2020-12-23 00:23:31,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-23 00:23:31,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:23:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:23:31,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:23:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2936 backedges. 39 proven. 196 refuted. 0 times theorem prover too weak. 2701 trivial. 0 not checked. [2020-12-23 00:23:32,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:23:32,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 20 [2020-12-23 00:23:32,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293213202] [2020-12-23 00:23:32,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:23:32,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:23:32,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:23:32,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:23:32,087 INFO L87 Difference]: Start difference. First operand 413 states and 498 transitions. Second operand 20 states. [2020-12-23 00:23:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:23:32,477 INFO L93 Difference]: Finished difference Result 503 states and 609 transitions. [2020-12-23 00:23:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:23:32,477 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 325 [2020-12-23 00:23:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:23:32,480 INFO L225 Difference]: With dead ends: 503 [2020-12-23 00:23:32,480 INFO L226 Difference]: Without dead ends: 416 [2020-12-23 00:23:32,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=429, Invalid=761, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:23:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-12-23 00:23:32,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 415. [2020-12-23 00:23:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-12-23 00:23:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 500 transitions. [2020-12-23 00:23:32,498 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 500 transitions. Word has length 325 [2020-12-23 00:23:32,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:23:32,498 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 500 transitions. [2020-12-23 00:23:32,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:23:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 500 transitions. [2020-12-23 00:23:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-12-23 00:23:32,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:23:32,502 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:23:32,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 00:23:32,718 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:23:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:23:32,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1687374659, now seen corresponding path program 13 times [2020-12-23 00:23:32,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:23:32,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324790768] [2020-12-23 00:23:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:23:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:23:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:33,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324790768] [2020-12-23 00:23:33,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850802837] [2020-12-23 00:23:33,206 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 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 [2020-12-23 00:23:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:23:33,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:23:33,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:23:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:33,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:23:33,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:23:33,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830808525] [2020-12-23 00:23:33,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:23:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:23:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:23:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:23:33,843 INFO L87 Difference]: Start difference. First operand 415 states and 500 transitions. Second operand 19 states. [2020-12-23 00:23:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:23:33,935 INFO L93 Difference]: Finished difference Result 505 states and 611 transitions. [2020-12-23 00:23:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:23:33,935 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 327 [2020-12-23 00:23:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:23:33,938 INFO L225 Difference]: With dead ends: 505 [2020-12-23 00:23:33,938 INFO L226 Difference]: Without dead ends: 418 [2020-12-23 00:23:33,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:23:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-12-23 00:23:33,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 417. [2020-12-23 00:23:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-23 00:23:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 502 transitions. [2020-12-23 00:23:33,955 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 502 transitions. Word has length 327 [2020-12-23 00:23:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:23:33,956 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 502 transitions. [2020-12-23 00:23:33,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:23:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 502 transitions. [2020-12-23 00:23:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-12-23 00:23:33,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:23:33,959 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:23:34,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:23:34,173 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:23:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:23:34,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1042833857, now seen corresponding path program 14 times [2020-12-23 00:23:34,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:23:34,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204359533] [2020-12-23 00:23:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:23:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:23:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2996 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204359533] [2020-12-23 00:23:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230653584] [2020-12-23 00:23:34,596 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 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 [2020-12-23 00:23:34,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:23:34,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:23:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:23:34,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:23:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2996 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:35,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:23:35,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:23:35,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305736941] [2020-12-23 00:23:35,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:23:35,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:23:35,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:23:35,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:23:35,261 INFO L87 Difference]: Start difference. First operand 417 states and 502 transitions. Second operand 20 states. [2020-12-23 00:23:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:23:35,354 INFO L93 Difference]: Finished difference Result 507 states and 613 transitions. [2020-12-23 00:23:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:23:35,354 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 329 [2020-12-23 00:23:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:23:35,357 INFO L225 Difference]: With dead ends: 507 [2020-12-23 00:23:35,357 INFO L226 Difference]: Without dead ends: 420 [2020-12-23 00:23:35,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:23:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-12-23 00:23:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 419. [2020-12-23 00:23:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-12-23 00:23:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 504 transitions. [2020-12-23 00:23:35,373 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 504 transitions. Word has length 329 [2020-12-23 00:23:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:23:35,373 INFO L481 AbstractCegarLoop]: Abstraction has 419 states and 504 transitions. [2020-12-23 00:23:35,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:23:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 504 transitions. [2020-12-23 00:23:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-12-23 00:23:35,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:23:35,377 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:23:35,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:23:35,591 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:23:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:23:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash 114413759, now seen corresponding path program 15 times [2020-12-23 00:23:35,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:23:35,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608715319] [2020-12-23 00:23:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:23:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:23:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:36,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608715319] [2020-12-23 00:23:36,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394903761] [2020-12-23 00:23:36,023 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:23:42,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 00:23:42,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:23:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:23:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:23:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:42,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:23:42,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 00:23:42,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489759112] [2020-12-23 00:23:42,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:23:42,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:23:42,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:23:42,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:23:42,607 INFO L87 Difference]: Start difference. First operand 419 states and 504 transitions. Second operand 21 states. [2020-12-23 00:23:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:23:42,713 INFO L93 Difference]: Finished difference Result 509 states and 615 transitions. [2020-12-23 00:23:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:23:42,714 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 331 [2020-12-23 00:23:42,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:23:42,717 INFO L225 Difference]: With dead ends: 509 [2020-12-23 00:23:42,717 INFO L226 Difference]: Without dead ends: 422 [2020-12-23 00:23:42,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:23:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-12-23 00:23:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 421. [2020-12-23 00:23:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-12-23 00:23:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 506 transitions. [2020-12-23 00:23:42,733 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 506 transitions. Word has length 331 [2020-12-23 00:23:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:23:42,734 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 506 transitions. [2020-12-23 00:23:42,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:23:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 506 transitions. [2020-12-23 00:23:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-12-23 00:23:42,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:23:42,752 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:23:42,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 00:23:42,966 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:23:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:23:42,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1255897149, now seen corresponding path program 16 times [2020-12-23 00:23:42,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:23:42,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092677247] [2020-12-23 00:23:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:23:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:23:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3064 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:43,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092677247] [2020-12-23 00:23:43,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102615121] [2020-12-23 00:23:43,517 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:23:43,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:23:43,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:23:43,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:23:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:23:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3064 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-12-23 00:23:44,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:23:44,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:23:44,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275443011] [2020-12-23 00:23:44,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:23:44,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:23:44,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:23:44,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:23:44,233 INFO L87 Difference]: Start difference. First operand 421 states and 506 transitions. Second operand 22 states. [2020-12-23 00:23:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:23:44,330 INFO L93 Difference]: Finished difference Result 510 states and 616 transitions. [2020-12-23 00:23:44,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:23:44,331 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 333 [2020-12-23 00:23:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:23:44,333 INFO L225 Difference]: With dead ends: 510 [2020-12-23 00:23:44,333 INFO L226 Difference]: Without dead ends: 423 [2020-12-23 00:23:44,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:23:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-12-23 00:23:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2020-12-23 00:23:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-12-23 00:23:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 508 transitions. [2020-12-23 00:23:44,348 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 508 transitions. Word has length 333 [2020-12-23 00:23:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:23:44,348 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 508 transitions. [2020-12-23 00:23:44,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:23:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 508 transitions. [2020-12-23 00:23:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-12-23 00:23:44,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:23:44,351 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:23:44,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 00:23:44,565 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:23:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:23:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1290192837, now seen corresponding path program 17 times [2020-12-23 00:23:44,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:23:44,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234927234] [2020-12-23 00:23:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:23:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:24:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3101 backedges. 298 proven. 1779 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-12-23 00:24:07,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234927234] [2020-12-23 00:24:07,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179736940] [2020-12-23 00:24:07,706 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true