/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/array-cav19/array_tripl_access_init_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:10:57,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:10:57,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:10:57,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:10:57,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:10:57,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:10:57,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:10:57,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:10:57,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:10:57,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:10:57,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:10:57,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:10:57,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:10:57,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:10:57,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:10:57,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:10:57,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:10:57,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:10:57,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:10:57,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:10:57,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:10:57,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:10:57,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:10:57,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:10:57,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:10:57,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:10:57,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:10:57,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:10:57,665 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 01:10:57,728 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:10:57,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:10:57,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:10:57,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:10:57,735 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:10:57,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:10:57,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:10:57,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:10:57,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:10:57,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:10:57,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:10:57,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:10:57,738 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:10:57,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:10:57,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:10:57,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:10:57,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:10:57,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:10:57,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:10:57,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:10:57,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:10:57,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:10:57,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:10:57,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:10:57,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:10:57,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:10:58,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:10:58,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:10:58,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:10:58,268 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:10:58,269 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:10:58,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2020-12-23 01:10:58,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/134f1cbf6/e610cb84eca746c98a83a1fa88b1ff02/FLAGaea0633dd [2020-12-23 01:10:59,064 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:10:59,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2020-12-23 01:10:59,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/134f1cbf6/e610cb84eca746c98a83a1fa88b1ff02/FLAGaea0633dd [2020-12-23 01:10:59,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/134f1cbf6/e610cb84eca746c98a83a1fa88b1ff02 [2020-12-23 01:10:59,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:10:59,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:10:59,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:10:59,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:10:59,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:10:59,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795cd187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59, skipping insertion in model container [2020-12-23 01:10:59,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:10:59,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:10:59,679 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/array-cav19/array_tripl_access_init_const.c[420,433] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[BinaryExpression[ARITHPLUS,IntegerLiteral[1],BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[BinaryExpression[ARITHPLUS,IntegerLiteral[2],BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:10:59,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:10:59,710 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:10:59,726 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/array-cav19/array_tripl_access_init_const.c[420,433] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[12],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHPLUS,IntegerLiteral[1],BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHPLUS,IntegerLiteral[2],BinaryExpression[ARITHMUL,IntegerLiteral[3],IdentifierExpression[~i~0,]]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:10:59,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:10:59,752 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:10:59,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59 WrapperNode [2020-12-23 01:10:59,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:10:59,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:10:59,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:10:59,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:10:59,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:10:59,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:10:59,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:10:59,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:10:59,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (1/1) ... [2020-12-23 01:10:59,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:10:59,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:10:59,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:10:59,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:10:59,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (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 01:10:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:10:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:10:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:10:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:10:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:10:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:10:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:11:00,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:11:00,319 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 01:11:00,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:11:00 BoogieIcfgContainer [2020-12-23 01:11:00,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:11:00,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:11:00,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:11:00,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:11:00,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:10:59" (1/3) ... [2020-12-23 01:11:00,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b53c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:11:00, skipping insertion in model container [2020-12-23 01:11:00,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:10:59" (2/3) ... [2020-12-23 01:11:00,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b53c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:11:00, skipping insertion in model container [2020-12-23 01:11:00,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:11:00" (3/3) ... [2020-12-23 01:11:00,334 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tripl_access_init_const.c [2020-12-23 01:11:00,342 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:11:00,348 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:11:00,374 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:11:00,438 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:11:00,438 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:11:00,439 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:11:00,439 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:11:00,439 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:11:00,439 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:11:00,439 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:11:00,440 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:11:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-23 01:11:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 01:11:00,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:00,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:00,501 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:00,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2020-12-23 01:11:00,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:00,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774165162] [2020-12-23 01:11:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:00,745 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 01:11:00,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774165162] [2020-12-23 01:11:00,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:11:00,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:11:00,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034461502] [2020-12-23 01:11:00,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:11:00,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:00,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:11:00,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:11:00,776 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-12-23 01:11:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:00,834 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-12-23 01:11:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:11:00,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 01:11:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:00,847 INFO L225 Difference]: With dead ends: 28 [2020-12-23 01:11:00,848 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 01:11:00,851 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 01:11:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 01:11:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-23 01:11:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 01:11:00,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 01:11:00,894 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2020-12-23 01:11:00,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:00,895 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 01:11:00,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:11:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 01:11:00,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 01:11:00,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:00,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:00,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:11:00,897 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:00,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:00,898 INFO L82 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2020-12-23 01:11:00,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:00,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511053794] [2020-12-23 01:11:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:00,977 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 01:11:00,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511053794] [2020-12-23 01:11:00,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147243962] [2020-12-23 01:11:00,978 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 01:11:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:01,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:11:01,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:01,166 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 01:11:01,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:01,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 01:11:01,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292338194] [2020-12-23 01:11:01,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:11:01,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:01,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:11:01,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:11:01,172 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-23 01:11:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:01,207 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-23 01:11:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:11:01,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-23 01:11:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:01,209 INFO L225 Difference]: With dead ends: 22 [2020-12-23 01:11:01,209 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 01:11:01,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:11:01,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 01:11:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-23 01:11:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 01:11:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-23 01:11:01,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-12-23 01:11:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:01,215 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-23 01:11:01,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:11:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-23 01:11:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:11:01,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:01,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:01,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 01:11:01,430 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:01,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1083191413, now seen corresponding path program 2 times [2020-12-23 01:11:01,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:01,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149486131] [2020-12-23 01:11:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:01,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149486131] [2020-12-23 01:11:01,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527654225] [2020-12-23 01:11:01,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:01,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:11:01,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:01,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:11:01,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:01,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:01,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 01:11:01,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719304038] [2020-12-23 01:11:01,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:11:01,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:01,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:11:01,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:11:01,654 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-12-23 01:11:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:01,699 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 01:11:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:11:01,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-23 01:11:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:01,701 INFO L225 Difference]: With dead ends: 24 [2020-12-23 01:11:01,701 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 01:11:01,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:11:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 01:11:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-23 01:11:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 01:11:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 01:11:01,707 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-12-23 01:11:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:01,707 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 01:11:01,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:11:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 01:11:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 01:11:01,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:01,708 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:01,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:01,924 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:01,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:01,926 INFO L82 PathProgramCache]: Analyzing trace with hash 80520521, now seen corresponding path program 3 times [2020-12-23 01:11:01,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:01,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411780641] [2020-12-23 01:11:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:02,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411780641] [2020-12-23 01:11:02,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468831435] [2020-12-23 01:11:02,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:02,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:11:02,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:02,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:11:02,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:02,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:02,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 01:11:02,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819943742] [2020-12-23 01:11:02,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:11:02,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:02,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:11:02,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:11:02,247 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2020-12-23 01:11:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:02,329 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-23 01:11:02,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:11:02,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-23 01:11:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:02,332 INFO L225 Difference]: With dead ends: 26 [2020-12-23 01:11:02,333 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 01:11:02,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:11:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 01:11:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-23 01:11:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 01:11:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 01:11:02,345 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-12-23 01:11:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:02,346 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 01:11:02,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:11:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 01:11:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 01:11:02,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:02,348 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:02,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:02,558 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:02,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 4 times [2020-12-23 01:11:02,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:02,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577672462] [2020-12-23 01:11:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:02,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577672462] [2020-12-23 01:11:02,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751499153] [2020-12-23 01:11:02,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:02,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:11:02,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:11:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:02,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:02,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 01:11:02,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557143563] [2020-12-23 01:11:02,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 01:11:02,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 01:11:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:11:02,875 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-12-23 01:11:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:02,929 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-23 01:11:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:11:02,930 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-23 01:11:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:02,931 INFO L225 Difference]: With dead ends: 28 [2020-12-23 01:11:02,931 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 01:11:02,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:11:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 01:11:02,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-23 01:11:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 01:11:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 01:11:02,937 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-12-23 01:11:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:02,937 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 01:11:02,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 01:11:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 01:11:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 01:11:02,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:02,938 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:03,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:03,154 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:03,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1638582853, now seen corresponding path program 5 times [2020-12-23 01:11:03,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:03,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581231453] [2020-12-23 01:11:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:03,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581231453] [2020-12-23 01:11:03,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735019553] [2020-12-23 01:11:03,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:03,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:11:03,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:03,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:11:03,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:03,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:03,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 01:11:03,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622201565] [2020-12-23 01:11:03,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 01:11:03,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:03,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 01:11:03,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:11:03,549 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2020-12-23 01:11:03,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:03,622 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-23 01:11:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:11:03,623 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 01:11:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:03,624 INFO L225 Difference]: With dead ends: 30 [2020-12-23 01:11:03,624 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 01:11:03,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:11:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 01:11:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-23 01:11:03,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 01:11:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 01:11:03,629 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2020-12-23 01:11:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:03,629 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 01:11:03,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 01:11:03,630 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 01:11:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:11:03,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:03,631 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:03,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 01:11:03,845 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:03,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:03,846 INFO L82 PathProgramCache]: Analyzing trace with hash 70506883, now seen corresponding path program 6 times [2020-12-23 01:11:03,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:03,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090348500] [2020-12-23 01:11:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:03,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090348500] [2020-12-23 01:11:03,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603873652] [2020-12-23 01:11:03,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:04,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:11:04,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:04,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:11:04,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:04,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:04,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 01:11:04,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451261464] [2020-12-23 01:11:04,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:11:04,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:04,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:11:04,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:11:04,237 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2020-12-23 01:11:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:04,321 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-23 01:11:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:11:04,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-23 01:11:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:04,323 INFO L225 Difference]: With dead ends: 32 [2020-12-23 01:11:04,323 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 01:11:04,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:11:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 01:11:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-23 01:11:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 01:11:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 01:11:04,329 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-12-23 01:11:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:04,329 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 01:11:04,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:11:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 01:11:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:11:04,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:04,330 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:04,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:04,546 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 683020609, now seen corresponding path program 7 times [2020-12-23 01:11:04,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:04,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453197899] [2020-12-23 01:11:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:04,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453197899] [2020-12-23 01:11:04,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747213890] [2020-12-23 01:11:04,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:04,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:11:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:04,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:04,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-23 01:11:04,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406916680] [2020-12-23 01:11:04,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:11:04,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:04,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:11:04,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:11:04,937 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 18 states. [2020-12-23 01:11:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:05,001 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-23 01:11:05,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:11:05,001 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-23 01:11:05,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:05,002 INFO L225 Difference]: With dead ends: 34 [2020-12-23 01:11:05,002 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 01:11:05,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:11:05,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 01:11:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-23 01:11:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 01:11:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-23 01:11:05,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-12-23 01:11:05,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:05,009 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-23 01:11:05,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:11:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-23 01:11:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:11:05,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:05,010 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:05,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:05,225 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:05,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:05,226 INFO L82 PathProgramCache]: Analyzing trace with hash 898191743, now seen corresponding path program 8 times [2020-12-23 01:11:05,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:05,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698786815] [2020-12-23 01:11:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:05,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698786815] [2020-12-23 01:11:05,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876695688] [2020-12-23 01:11:05,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:05,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:11:05,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:11:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:05,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:05,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-23 01:11:05,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016769755] [2020-12-23 01:11:05,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:11:05,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:05,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:11:05,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:11:05,592 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2020-12-23 01:11:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:05,664 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-23 01:11:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:11:05,665 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-23 01:11:05,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:05,666 INFO L225 Difference]: With dead ends: 36 [2020-12-23 01:11:05,666 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 01:11:05,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:11:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 01:11:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 01:11:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 01:11:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-23 01:11:05,672 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2020-12-23 01:11:05,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:05,672 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-23 01:11:05,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:11:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-23 01:11:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 01:11:05,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:05,673 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:05,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 01:11:05,889 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:05,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1519221309, now seen corresponding path program 9 times [2020-12-23 01:11:05,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:05,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536795779] [2020-12-23 01:11:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:06,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536795779] [2020-12-23 01:11:06,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767899714] [2020-12-23 01:11:06,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:06,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 01:11:06,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:06,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:11:06,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:06,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:06,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-23 01:11:06,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389307475] [2020-12-23 01:11:06,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:11:06,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:06,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:11:06,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:11:06,588 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2020-12-23 01:11:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:06,682 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-23 01:11:06,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:11:06,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 01:11:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:06,684 INFO L225 Difference]: With dead ends: 38 [2020-12-23 01:11:06,684 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 01:11:06,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:11:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 01:11:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 01:11:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 01:11:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 01:11:06,689 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-12-23 01:11:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:06,690 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 01:11:06,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:11:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 01:11:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 01:11:06,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:06,691 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:06,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:06,896 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 10 times [2020-12-23 01:11:06,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:06,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559095720] [2020-12-23 01:11:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:07,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559095720] [2020-12-23 01:11:07,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128878296] [2020-12-23 01:11:07,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:07,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:11:07,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 01:11:07,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:07,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:07,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-23 01:11:07,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886570994] [2020-12-23 01:11:07,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 01:11:07,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:07,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 01:11:07,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=321, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:11:07,364 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2020-12-23 01:11:07,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:07,457 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-23 01:11:07,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:11:07,457 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-23 01:11:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:07,458 INFO L225 Difference]: With dead ends: 40 [2020-12-23 01:11:07,458 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 01:11:07,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=321, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:11:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 01:11:07,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-23 01:11:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 01:11:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-23 01:11:07,464 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-12-23 01:11:07,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:07,464 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-23 01:11:07,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 01:11:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-23 01:11:07,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:11:07,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:07,466 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:07,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:07,680 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1873803975, now seen corresponding path program 11 times [2020-12-23 01:11:07,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:07,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053888187] [2020-12-23 01:11:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:07,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053888187] [2020-12-23 01:11:07,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342741388] [2020-12-23 01:11:07,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:09,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 01:11:09,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:09,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:11:09,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:09,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:09,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-23 01:11:09,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110758151] [2020-12-23 01:11:09,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 01:11:09,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:09,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 01:11:09,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=380, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:11:09,327 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2020-12-23 01:11:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:09,431 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-23 01:11:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:11:09,432 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-12-23 01:11:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:09,432 INFO L225 Difference]: With dead ends: 42 [2020-12-23 01:11:09,432 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 01:11:09,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=380, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:11:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 01:11:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 01:11:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 01:11:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-23 01:11:09,438 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2020-12-23 01:11:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:09,439 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-23 01:11:09,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 01:11:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-23 01:11:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:11:09,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:09,440 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:09,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 01:11:09,654 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:09,655 INFO L82 PathProgramCache]: Analyzing trace with hash 511059831, now seen corresponding path program 12 times [2020-12-23 01:11:09,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:09,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551848443] [2020-12-23 01:11:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:09,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551848443] [2020-12-23 01:11:09,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595417714] [2020-12-23 01:11:09,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:11,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 01:11:11,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:11,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:11:11,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:11,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:11,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-23 01:11:11,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320899607] [2020-12-23 01:11:11,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 01:11:11,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 01:11:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=444, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:11:11,647 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2020-12-23 01:11:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:11,758 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-23 01:11:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:11:11,759 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-12-23 01:11:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:11,759 INFO L225 Difference]: With dead ends: 44 [2020-12-23 01:11:11,759 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 01:11:11,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=312, Invalid=444, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:11:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 01:11:11,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-23 01:11:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 01:11:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 01:11:11,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-12-23 01:11:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:11,764 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 01:11:11,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 01:11:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 01:11:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 01:11:11,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:11,765 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:11,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:11:11,974 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1147358667, now seen corresponding path program 13 times [2020-12-23 01:11:11,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:11,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471419105] [2020-12-23 01:11:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:12,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471419105] [2020-12-23 01:11:12,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135177713] [2020-12-23 01:11:12,198 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 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 01:11:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:12,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:11:12,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:12,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:12,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 01:11:12,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301477996] [2020-12-23 01:11:12,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 01:11:12,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:12,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 01:11:12,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-12-23 01:11:12,628 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 30 states. [2020-12-23 01:11:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:12,757 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-23 01:11:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:11:12,758 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-12-23 01:11:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:12,760 INFO L225 Difference]: With dead ends: 46 [2020-12-23 01:11:12,760 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 01:11:12,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-12-23 01:11:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 01:11:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-23 01:11:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 01:11:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-23 01:11:12,770 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-12-23 01:11:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:12,770 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-23 01:11:12,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 01:11:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-23 01:11:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 01:11:12,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:12,772 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:12,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:11:12,981 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:12,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1454668429, now seen corresponding path program 14 times [2020-12-23 01:11:12,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:12,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412689189] [2020-12-23 01:11:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:13,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412689189] [2020-12-23 01:11:13,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911905611] [2020-12-23 01:11:13,219 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 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 01:11:13,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:11:13,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:11:13,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:13,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:13,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-23 01:11:13,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747423126] [2020-12-23 01:11:13,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 01:11:13,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:13,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 01:11:13,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=587, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:11:13,600 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 32 states. [2020-12-23 01:11:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:13,744 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-23 01:11:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:11:13,745 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-23 01:11:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:13,745 INFO L225 Difference]: With dead ends: 48 [2020-12-23 01:11:13,745 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 01:11:13,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=587, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:11:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 01:11:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-23 01:11:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 01:11:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-23 01:11:13,752 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2020-12-23 01:11:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:13,752 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-23 01:11:13,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 01:11:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-23 01:11:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 01:11:13,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:13,753 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:13,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:13,968 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:13,969 INFO L82 PathProgramCache]: Analyzing trace with hash -426606287, now seen corresponding path program 15 times [2020-12-23 01:11:13,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:13,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143933841] [2020-12-23 01:11:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:14,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143933841] [2020-12-23 01:11:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766820371] [2020-12-23 01:11:14,227 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 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 01:11:17,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 01:11:17,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:17,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:11:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:17,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:17,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-12-23 01:11:17,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935985613] [2020-12-23 01:11:17,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 01:11:17,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 01:11:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=666, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 01:11:17,406 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 34 states. [2020-12-23 01:11:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:17,546 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-23 01:11:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:11:17,547 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-12-23 01:11:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:17,548 INFO L225 Difference]: With dead ends: 50 [2020-12-23 01:11:17,548 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 01:11:17,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=456, Invalid=666, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 01:11:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 01:11:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-23 01:11:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 01:11:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 01:11:17,554 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2020-12-23 01:11:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:17,554 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 01:11:17,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 01:11:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 01:11:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 01:11:17,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:17,555 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:17,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:11:17,771 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash -301365905, now seen corresponding path program 16 times [2020-12-23 01:11:17,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:17,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896122521] [2020-12-23 01:11:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:18,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896122521] [2020-12-23 01:11:18,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689573830] [2020-12-23 01:11:18,120 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 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 01:11:18,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:11:18,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:11:18,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:18,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:18,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-12-23 01:11:18,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814829648] [2020-12-23 01:11:18,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 01:11:18,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 01:11:18,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:11:18,587 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2020-12-23 01:11:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:18,749 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-23 01:11:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:11:18,749 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-23 01:11:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:18,750 INFO L225 Difference]: With dead ends: 52 [2020-12-23 01:11:18,750 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 01:11:18,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:11:18,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 01:11:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-23 01:11:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 01:11:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-23 01:11:18,756 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2020-12-23 01:11:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:18,756 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-23 01:11:18,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 01:11:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-23 01:11:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 01:11:18,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:18,757 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:18,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:11:18,972 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:18,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:18,973 INFO L82 PathProgramCache]: Analyzing trace with hash -204443091, now seen corresponding path program 17 times [2020-12-23 01:11:18,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:18,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985628656] [2020-12-23 01:11:18,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:19,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985628656] [2020-12-23 01:11:19,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490551702] [2020-12-23 01:11:19,315 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 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 01:11:31,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 01:11:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:11:31,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:31,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:31,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2020-12-23 01:11:31,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276605062] [2020-12-23 01:11:31,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 01:11:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:31,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 01:11:31,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 01:11:31,855 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 38 states. [2020-12-23 01:11:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:32,012 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-12-23 01:11:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 01:11:32,012 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-12-23 01:11:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:32,013 INFO L225 Difference]: With dead ends: 54 [2020-12-23 01:11:32,013 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 01:11:32,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 01:11:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 01:11:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-23 01:11:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 01:11:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-23 01:11:32,019 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2020-12-23 01:11:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:32,020 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-23 01:11:32,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 01:11:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-23 01:11:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 01:11:32,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:32,021 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:32,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 01:11:32,235 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:32,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1550899349, now seen corresponding path program 18 times [2020-12-23 01:11:32,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:32,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179123308] [2020-12-23 01:11:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:32,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179123308] [2020-12-23 01:11:32,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425007023] [2020-12-23 01:11:32,648 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 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 01:11:43,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 01:11:43,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:43,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 01:11:43,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:44,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:44,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-23 01:11:44,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735229079] [2020-12-23 01:11:44,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 01:11:44,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:44,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 01:11:44,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=933, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:11:44,116 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 40 states. [2020-12-23 01:11:44,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:44,237 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-23 01:11:44,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:11:44,238 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-23 01:11:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:44,239 INFO L225 Difference]: With dead ends: 56 [2020-12-23 01:11:44,239 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 01:11:44,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=933, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:11:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 01:11:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 01:11:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 01:11:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 01:11:44,244 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2020-12-23 01:11:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:44,245 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 01:11:44,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 01:11:44,245 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 01:11:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 01:11:44,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:44,246 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:44,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:44,446 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:44,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1584760105, now seen corresponding path program 19 times [2020-12-23 01:11:44,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:44,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006750112] [2020-12-23 01:11:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:44,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006750112] [2020-12-23 01:11:44,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307318829] [2020-12-23 01:11:44,818 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 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 01:11:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:44,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 01:11:44,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:45,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:45,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2020-12-23 01:11:45,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648373540] [2020-12-23 01:11:45,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 01:11:45,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:45,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 01:11:45,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=1032, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 01:11:45,369 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 42 states. [2020-12-23 01:11:45,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:45,534 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-23 01:11:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:11:45,535 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-12-23 01:11:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:45,535 INFO L225 Difference]: With dead ends: 58 [2020-12-23 01:11:45,535 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 01:11:45,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=690, Invalid=1032, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 01:11:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 01:11:45,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-23 01:11:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 01:11:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-23 01:11:45,547 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2020-12-23 01:11:45,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:45,547 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-23 01:11:45,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 01:11:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-23 01:11:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 01:11:45,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:45,549 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:45,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:45,762 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash -113546393, now seen corresponding path program 20 times [2020-12-23 01:11:45,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:45,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674758672] [2020-12-23 01:11:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:46,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674758672] [2020-12-23 01:11:46,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600040187] [2020-12-23 01:11:46,163 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 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 01:11:46,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:11:46,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 01:11:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:46,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:46,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-12-23 01:11:46,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661305434] [2020-12-23 01:11:46,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 01:11:46,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:46,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 01:11:46,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1136, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:11:46,738 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 44 states. [2020-12-23 01:11:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:46,862 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-23 01:11:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 01:11:46,863 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-23 01:11:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:46,864 INFO L225 Difference]: With dead ends: 60 [2020-12-23 01:11:46,864 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 01:11:46,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=756, Invalid=1136, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:11:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 01:11:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-23 01:11:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 01:11:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 01:11:46,873 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2020-12-23 01:11:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:46,874 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 01:11:46,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 01:11:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 01:11:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:11:46,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:46,875 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:47,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 01:11:47,088 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:47,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:47,088 INFO L82 PathProgramCache]: Analyzing trace with hash -98518491, now seen corresponding path program 21 times [2020-12-23 01:11:47,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:47,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077819643] [2020-12-23 01:11:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:47,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077819643] [2020-12-23 01:11:47,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485693005] [2020-12-23 01:11:47,515 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 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 01:12:25,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 01:12:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:12:25,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:25,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:25,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2020-12-23 01:12:25,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436032123] [2020-12-23 01:12:25,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 01:12:25,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:25,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 01:12:25,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=1245, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 01:12:25,682 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 46 states. [2020-12-23 01:12:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:25,850 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-23 01:12:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:12:25,854 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2020-12-23 01:12:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:25,854 INFO L225 Difference]: With dead ends: 62 [2020-12-23 01:12:25,854 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 01:12:25,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=825, Invalid=1245, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 01:12:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 01:12:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-23 01:12:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 01:12:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-23 01:12:25,860 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2020-12-23 01:12:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:25,860 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-23 01:12:25,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 01:12:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-23 01:12:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:12:25,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:25,861 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:26,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 01:12:26,075 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:26,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 22 times [2020-12-23 01:12:26,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:26,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843863561] [2020-12-23 01:12:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:26,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843863561] [2020-12-23 01:12:26,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762007332] [2020-12-23 01:12:26,562 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 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 01:12:26,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:12:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:12:26,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 01:12:26,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:12:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:27,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:12:27,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-12-23 01:12:27,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284815413] [2020-12-23 01:12:27,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 01:12:27,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:12:27,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 01:12:27,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1359, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 01:12:27,250 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 48 states. [2020-12-23 01:12:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:12:27,402 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-12-23 01:12:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 01:12:27,403 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-23 01:12:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:12:27,403 INFO L225 Difference]: With dead ends: 64 [2020-12-23 01:12:27,404 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 01:12:27,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=897, Invalid=1359, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 01:12:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 01:12:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-23 01:12:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 01:12:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-23 01:12:27,409 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2020-12-23 01:12:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:12:27,409 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-23 01:12:27,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 01:12:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-23 01:12:27,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 01:12:27,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:12:27,410 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:12:27,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:12:27,624 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:12:27,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:12:27,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1292824287, now seen corresponding path program 23 times [2020-12-23 01:12:27,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:12:27,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351439192] [2020-12-23 01:12:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:12:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:12:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:12:28,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351439192] [2020-12-23 01:12:28,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047260310] [2020-12-23 01:12:28,065 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 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 01:13:50,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 01:13:50,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:13:50,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 01:13:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:13:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:51,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:13:51,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-12-23 01:13:51,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754797579] [2020-12-23 01:13:51,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 01:13:51,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:13:51,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 01:13:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=1478, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 01:13:51,171 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 50 states. [2020-12-23 01:13:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:13:51,390 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-12-23 01:13:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:13:51,391 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2020-12-23 01:13:51,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:13:51,392 INFO L225 Difference]: With dead ends: 66 [2020-12-23 01:13:51,392 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 01:13:51,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=972, Invalid=1478, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 01:13:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 01:13:51,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-12-23 01:13:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 01:13:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-23 01:13:51,397 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2020-12-23 01:13:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:13:51,397 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-23 01:13:51,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 01:13:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-23 01:13:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 01:13:51,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:13:51,397 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:13:51,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 01:13:51,598 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:13:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:13:51,599 INFO L82 PathProgramCache]: Analyzing trace with hash 486791519, now seen corresponding path program 24 times [2020-12-23 01:13:51,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:13:51,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945958344] [2020-12-23 01:13:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:13:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:13:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:13:52,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945958344] [2020-12-23 01:13:52,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817728994] [2020-12-23 01:13:52,130 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 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