/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/loop-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:46:59,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:46:59,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:47:00,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:47:00,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:47:00,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:47:00,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:47:00,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:47:00,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:47:00,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:47:00,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:47:00,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:47:00,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:47:00,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:47:00,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:47:00,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:47:00,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:47:00,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:47:00,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:47:00,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:47:00,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:47:00,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:47:00,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:47:00,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:47:00,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:47:00,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:47:00,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:47:00,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:47:00,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:47:00,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:47:00,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:47:00,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:47:00,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:47:00,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:47:00,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:47:00,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:47:00,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:47:00,155 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:47:00,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:47:00,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:47:00,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:47:00,157 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:47:00,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:47:00,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:47:00,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:47:00,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:47:00,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:47:00,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:47:00,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:47:00,159 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:47:00,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:47:00,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:47:00,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:47:00,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:47:00,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:47:00,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:47:00,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:47:00,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:47:00,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:47:00,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:47:00,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:47:00,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:47:00,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:47:00,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:47:00,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:47:00,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:47:00,570 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:47:00,571 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:47:00,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_1-1.c [2020-12-23 06:47:00,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e3ea0ee6/2d4e1d3362994d7b8717843cba6bb75a/FLAGa6a68b6e4 [2020-12-23 06:47:01,300 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:47:01,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_1-1.c [2020-12-23 06:47:01,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e3ea0ee6/2d4e1d3362994d7b8717843cba6bb75a/FLAGa6a68b6e4 [2020-12-23 06:47:01,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e3ea0ee6/2d4e1d3362994d7b8717843cba6bb75a [2020-12-23 06:47:01,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:47:01,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:47:01,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:47:01,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:47:01,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:47:01,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:01,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6930cd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01, skipping insertion in model container [2020-12-23 06:47:01,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:01,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:47:01,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:47:01,922 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/loop-acceleration/array_1-1.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]] [2020-12-23 06:47:01,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:47:01,950 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:47:01,965 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/loop-acceleration/array_1-1.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] [2020-12-23 06:47:01,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:47:01,988 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:47:01,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01 WrapperNode [2020-12-23 06:47:01,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:47:01,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:47:01,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:47:01,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:47:02,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:02,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:02,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:47:02,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:47:02,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:47:02,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:47:02,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:02,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:02,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:02,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:02,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:02,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:02,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (1/1) ... [2020-12-23 06:47:02,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:47:02,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:47:02,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:47:02,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:47:02,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:47:02,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:47:02,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:47:02,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:47:02,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:47:02,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:47:02,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:47:02,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:47:02,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:47:02,629 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:47:02,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:47:02 BoogieIcfgContainer [2020-12-23 06:47:02,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:47:02,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:47:02,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:47:02,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:47:02,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:47:01" (1/3) ... [2020-12-23 06:47:02,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a8baef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:47:02, skipping insertion in model container [2020-12-23 06:47:02,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:01" (2/3) ... [2020-12-23 06:47:02,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a8baef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:47:02, skipping insertion in model container [2020-12-23 06:47:02,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:47:02" (3/3) ... [2020-12-23 06:47:02,642 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2020-12-23 06:47:02,650 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:47:02,656 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:47:02,680 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:47:02,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:47:02,715 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:47:02,716 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:47:02,716 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:47:02,716 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:47:02,716 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:47:02,716 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:47:02,716 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:47:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 06:47:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:47:02,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:02,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:47:02,765 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:02,803 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2020-12-23 06:47:02,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:02,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718721862] [2020-12-23 06:47:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:03,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718721862] [2020-12-23 06:47:03,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:47:03,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:47:03,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228662991] [2020-12-23 06:47:03,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:47:03,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:03,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:47:03,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:47:03,173 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-23 06:47:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:03,242 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-23 06:47:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:47:03,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:47:03,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:03,268 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:47:03,268 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:47:03,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:47:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:47:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-23 06:47:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:47:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 06:47:03,321 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-12-23 06:47:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:03,321 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 06:47:03,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:47:03,322 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 06:47:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:47:03,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:03,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:03,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:47:03,326 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:03,332 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2020-12-23 06:47:03,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:03,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931280096] [2020-12-23 06:47:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:03,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931280096] [2020-12-23 06:47:03,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593563667] [2020-12-23 06:47:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:03,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:47:03,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:03,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:03,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:47:03,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034239348] [2020-12-23 06:47:03,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:47:03,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:03,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:47:03,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:47:03,637 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-12-23 06:47:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:03,657 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-23 06:47:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:47:03,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 06:47:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:03,658 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:47:03,659 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:47:03,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:47:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:47:03,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-23 06:47:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:47:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-23 06:47:03,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-12-23 06:47:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:03,664 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-23 06:47:03,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:47:03,664 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-23 06:47:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:47:03,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:03,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:03,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:47:03,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:03,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2020-12-23 06:47:03,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:03,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116782374] [2020-12-23 06:47:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:03,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116782374] [2020-12-23 06:47:03,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574174172] [2020-12-23 06:47:03,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:04,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:04,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:04,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:47:04,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:04,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:04,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:47:04,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653557868] [2020-12-23 06:47:04,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:47:04,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:04,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:47:04,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:47:04,098 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-23 06:47:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:04,138 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-23 06:47:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:47:04,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 06:47:04,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:04,139 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:47:04,139 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:47:04,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:47:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:47:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-23 06:47:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:47:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 06:47:04,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-12-23 06:47:04,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:04,148 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 06:47:04,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:47:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 06:47:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:47:04,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:04,149 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:04,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:04,350 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:04,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:04,352 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2020-12-23 06:47:04,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:04,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122026274] [2020-12-23 06:47:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:04,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122026274] [2020-12-23 06:47:04,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762897954] [2020-12-23 06:47:04,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:04,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:47:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:04,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:47:04,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:04,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:04,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:47:04,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430016236] [2020-12-23 06:47:04,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:47:04,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:04,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:47:04,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:47:04,537 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-12-23 06:47:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:04,565 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-23 06:47:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:47:04,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 06:47:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:04,566 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:47:04,566 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:47:04,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:47:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:47:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-23 06:47:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:47:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 06:47:04,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-23 06:47:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:04,572 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 06:47:04,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:47:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 06:47:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:47:04,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:04,574 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:04,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:04,788 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:04,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:04,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2020-12-23 06:47:04,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:04,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145803572] [2020-12-23 06:47:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:04,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145803572] [2020-12-23 06:47:04,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934990517] [2020-12-23 06:47:04,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:04,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:47:04,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:47:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:04,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:04,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:47:04,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888052318] [2020-12-23 06:47:04,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:47:04,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:04,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:47:04,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:47:04,989 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-12-23 06:47:05,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:05,022 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-23 06:47:05,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:47:05,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 06:47:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:05,023 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:47:05,024 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:47:05,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:47:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:47:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 06:47:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:47:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 06:47:05,029 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-12-23 06:47:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:05,030 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 06:47:05,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:47:05,030 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 06:47:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:47:05,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:05,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:05,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:05,234 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2020-12-23 06:47:05,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:05,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278534417] [2020-12-23 06:47:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:05,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278534417] [2020-12-23 06:47:05,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830524642] [2020-12-23 06:47:05,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:05,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:47:05,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:05,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:47:05,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:05,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:05,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:47:05,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751341855] [2020-12-23 06:47:05,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:47:05,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:05,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:47:05,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:47:05,557 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-12-23 06:47:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:05,591 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 06:47:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:47:05,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 06:47:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:05,593 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:47:05,593 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 06:47:05,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:47:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 06:47:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-23 06:47:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:47:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 06:47:05,610 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-12-23 06:47:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:05,610 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 06:47:05,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:47:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 06:47:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:47:05,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:05,613 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:05,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:47:05,827 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:05,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:05,828 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2020-12-23 06:47:05,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:05,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62014173] [2020-12-23 06:47:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:05,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62014173] [2020-12-23 06:47:05,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66806251] [2020-12-23 06:47:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:06,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:47:06,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:47:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:06,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:06,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:47:06,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172764626] [2020-12-23 06:47:06,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:47:06,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:06,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:47:06,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:47:06,143 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-12-23 06:47:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:06,178 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-23 06:47:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:47:06,179 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 06:47:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:06,180 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:47:06,180 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:47:06,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:47:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:47:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-23 06:47:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:47:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-23 06:47:06,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-12-23 06:47:06,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:06,185 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-23 06:47:06,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:47:06,185 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-23 06:47:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:47:06,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:06,186 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:06,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:06,401 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:06,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:06,402 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2020-12-23 06:47:06,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:06,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940826074] [2020-12-23 06:47:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:06,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940826074] [2020-12-23 06:47:06,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913995515] [2020-12-23 06:47:06,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:06,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:47:06,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:06,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:06,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:47:06,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029571915] [2020-12-23 06:47:06,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:47:06,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:06,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:47:06,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:47:06,617 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2020-12-23 06:47:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:06,651 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 06:47:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:47:06,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-23 06:47:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:06,653 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:47:06,653 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:47:06,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:47:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:47:06,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-23 06:47:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:47:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 06:47:06,658 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-12-23 06:47:06,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:06,658 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 06:47:06,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:47:06,659 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 06:47:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:47:06,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:06,660 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:06,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:06,874 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:06,875 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2020-12-23 06:47:06,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:06,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403176493] [2020-12-23 06:47:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:06,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403176493] [2020-12-23 06:47:06,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567976190] [2020-12-23 06:47:06,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:07,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:07,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:07,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:47:07,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:07,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:07,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:47:07,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70858511] [2020-12-23 06:47:07,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:47:07,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:07,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:47:07,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:47:07,134 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-12-23 06:47:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:07,190 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-23 06:47:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:47:07,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-23 06:47:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:07,191 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:47:07,192 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:47:07,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:47:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:47:07,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-23 06:47:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:47:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-23 06:47:07,197 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-23 06:47:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:07,197 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-23 06:47:07,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:47:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-23 06:47:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:47:07,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:07,198 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:07,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:47:07,412 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:07,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:07,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2020-12-23 06:47:07,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:07,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994777414] [2020-12-23 06:47:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:07,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994777414] [2020-12-23 06:47:07,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242276121] [2020-12-23 06:47:07,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:07,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:47:07,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:07,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:47:07,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:07,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:07,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:47:07,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046224835] [2020-12-23 06:47:07,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:47:07,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:07,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:47:07,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:47:07,759 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-12-23 06:47:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:07,815 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-23 06:47:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:47:07,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-23 06:47:07,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:07,816 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:47:07,816 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:47:07,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:47:07,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:47:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 06:47:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:47:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-23 06:47:07,821 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-12-23 06:47:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:07,822 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-23 06:47:07,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:47:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-23 06:47:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:47:07,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:07,823 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:08,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:08,038 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:08,039 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2020-12-23 06:47:08,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:08,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174120227] [2020-12-23 06:47:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:08,231 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 06:47:08,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174120227] [2020-12-23 06:47:08,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478020059] [2020-12-23 06:47:08,232 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 06:47:08,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:47:08,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:08,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:47:08,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:08,370 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 06:47:08,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:08,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:47:08,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791637452] [2020-12-23 06:47:08,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:47:08,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:08,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:47:08,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:47:08,375 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-12-23 06:47:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:08,436 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 06:47:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:47:08,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-23 06:47:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:08,437 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:47:08,437 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:47:08,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:47:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:47:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-23 06:47:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:47:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-23 06:47:08,442 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-12-23 06:47:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:08,443 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-23 06:47:08,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:47:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-23 06:47:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:47:08,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:08,444 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:08,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:08,649 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2020-12-23 06:47:08,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:08,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910428094] [2020-12-23 06:47:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:08,845 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 06:47:08,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910428094] [2020-12-23 06:47:08,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160364579] [2020-12-23 06:47:08,846 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 06:47:08,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:47:08,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:08,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:47:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:08,995 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 06:47:08,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:08,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:47:08,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178875676] [2020-12-23 06:47:08,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:47:08,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:08,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:47:08,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:47:08,998 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-12-23 06:47:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:09,083 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-23 06:47:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:47:09,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-23 06:47:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:09,085 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:47:09,085 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:47:09,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:47:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:47:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-23 06:47:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:47:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-23 06:47:09,091 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-12-23 06:47:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:09,091 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-23 06:47:09,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:47:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-23 06:47:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:47:09,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:09,092 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:09,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:47:09,306 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:09,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2020-12-23 06:47:09,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:09,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817704217] [2020-12-23 06:47:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:09,470 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 06:47:09,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817704217] [2020-12-23 06:47:09,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857041932] [2020-12-23 06:47:09,470 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 06:47:09,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:47:09,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:09,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:47:09,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:09,747 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 06:47:09,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:09,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:47:09,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843216566] [2020-12-23 06:47:09,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:47:09,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:47:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:47:09,750 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2020-12-23 06:47:09,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:09,810 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-23 06:47:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:47:09,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-23 06:47:09,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:09,811 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:47:09,811 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:47:09,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:47:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:47:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-23 06:47:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:47:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-23 06:47:09,817 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-23 06:47:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:09,817 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-23 06:47:09,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:47:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-23 06:47:09,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:47:09,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:09,818 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:10,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:47:10,032 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2020-12-23 06:47:10,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:10,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282164761] [2020-12-23 06:47:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:10,245 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 06:47:10,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282164761] [2020-12-23 06:47:10,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334257098] [2020-12-23 06:47:10,246 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 06:47:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:10,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:47:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:10,411 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 06:47:10,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:10,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:47:10,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494554992] [2020-12-23 06:47:10,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:47:10,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:10,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:47:10,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:47:10,415 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2020-12-23 06:47:10,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:10,469 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-23 06:47:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:47:10,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-23 06:47:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:10,470 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:47:10,471 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:47:10,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:47:10,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:47:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-23 06:47:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 06:47:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-23 06:47:10,476 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-12-23 06:47:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:10,477 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-23 06:47:10,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:47:10,477 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-23 06:47:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:47:10,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:10,478 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:10,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:47:10,683 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:10,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2020-12-23 06:47:10,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:10,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527529253] [2020-12-23 06:47:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:10,887 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 06:47:10,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527529253] [2020-12-23 06:47:10,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010403389] [2020-12-23 06:47:10,888 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 06:47:10,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:10,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:10,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:47:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:11,016 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 06:47:11,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:11,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:47:11,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698594671] [2020-12-23 06:47:11,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:47:11,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:11,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:47:11,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:47:11,018 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2020-12-23 06:47:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:11,093 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-23 06:47:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:47:11,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-23 06:47:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:11,095 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:47:11,096 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:47:11,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:47:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:47:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-23 06:47:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:47:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-23 06:47:11,106 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-12-23 06:47:11,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:11,107 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-23 06:47:11,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:47:11,107 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-23 06:47:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:47:11,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:11,109 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:11,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:11,319 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:11,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2020-12-23 06:47:11,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:11,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498364285] [2020-12-23 06:47:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:11,526 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 06:47:11,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498364285] [2020-12-23 06:47:11,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439903285] [2020-12-23 06:47:11,527 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 06:47:11,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 06:47:11,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:47:11,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:11,989 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 06:47:11,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:11,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:47:11,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440435726] [2020-12-23 06:47:11,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:47:11,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:11,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:47:11,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:47:11,995 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2020-12-23 06:47:12,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:12,054 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-23 06:47:12,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:47:12,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-12-23 06:47:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:12,056 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:47:12,056 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:47:12,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:47:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:47:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-23 06:47:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:47:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-23 06:47:12,063 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-12-23 06:47:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:12,064 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-23 06:47:12,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:47:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-23 06:47:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:47:12,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:12,065 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:12,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:47:12,270 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:12,271 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2020-12-23 06:47:12,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:12,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814502034] [2020-12-23 06:47:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:12,533 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 06:47:12,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814502034] [2020-12-23 06:47:12,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942852952] [2020-12-23 06:47:12,539 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 06:47:12,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:47:12,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:12,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:47:12,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:12,676 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 06:47:12,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:12,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:47:12,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215519049] [2020-12-23 06:47:12,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:47:12,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:12,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:47:12,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:47:12,679 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2020-12-23 06:47:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:12,762 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-23 06:47:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:47:12,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-23 06:47:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:12,767 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:47:12,767 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:47:12,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:47:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:47:12,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-23 06:47:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:47:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-23 06:47:12,777 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-12-23 06:47:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:12,778 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-23 06:47:12,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:47:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-23 06:47:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:47:12,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:12,784 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:12,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:47:12,999 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:13,000 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2020-12-23 06:47:13,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:13,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069648816] [2020-12-23 06:47:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:13,258 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 06:47:13,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069648816] [2020-12-23 06:47:13,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341201485] [2020-12-23 06:47:13,259 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 06:47:13,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:47:13,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:13,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:47:13,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:13,561 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 06:47:13,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:13,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:47:13,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321634068] [2020-12-23 06:47:13,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:47:13,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:13,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:47:13,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:47:13,564 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2020-12-23 06:47:13,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:13,655 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-23 06:47:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:47:13,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-23 06:47:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:13,656 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:47:13,656 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:47:13,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:47:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:47:13,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-23 06:47:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:47:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-23 06:47:13,661 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-12-23 06:47:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:13,662 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-23 06:47:13,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:47:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-23 06:47:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:47:13,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:13,663 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:13,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:47:13,877 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2020-12-23 06:47:13,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:13,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778714347] [2020-12-23 06:47:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:14,139 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 06:47:14,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778714347] [2020-12-23 06:47:14,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639075454] [2020-12-23 06:47:14,140 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 06:47:14,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:47:14,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:14,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:47:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:14,943 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 06:47:14,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:14,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:47:14,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823579926] [2020-12-23 06:47:14,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:47:14,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:14,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:47:14,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:47:14,945 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2020-12-23 06:47:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:15,012 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-23 06:47:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:47:15,012 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-23 06:47:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:15,013 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:47:15,013 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:47:15,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:47:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:47:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-23 06:47:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 06:47:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-23 06:47:15,019 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-12-23 06:47:15,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:15,019 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-23 06:47:15,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:47:15,019 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-23 06:47:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:47:15,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:15,020 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:15,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:15,234 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:15,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:15,234 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2020-12-23 06:47:15,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:15,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058827722] [2020-12-23 06:47:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:15,529 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 06:47:15,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058827722] [2020-12-23 06:47:15,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581688958] [2020-12-23 06:47:15,529 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 06:47:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:15,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:47:15,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:15,675 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 06:47:15,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:15,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:47:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028920062] [2020-12-23 06:47:15,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:47:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:47:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:47:15,677 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2020-12-23 06:47:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:15,754 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-23 06:47:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:47:15,754 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-23 06:47:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:15,755 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:47:15,755 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:47:15,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:47:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:47:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-23 06:47:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:47:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-23 06:47:15,760 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-12-23 06:47:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:15,760 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-23 06:47:15,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:47:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-23 06:47:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:47:15,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:15,761 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:15,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:15,975 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2020-12-23 06:47:15,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:15,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619467551] [2020-12-23 06:47:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:16,309 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 06:47:16,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619467551] [2020-12-23 06:47:16,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424984319] [2020-12-23 06:47:16,310 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 06:47:16,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:16,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:47:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:16,454 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 06:47:16,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:16,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:47:16,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299491794] [2020-12-23 06:47:16,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:47:16,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:16,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:47:16,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:47:16,457 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-12-23 06:47:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:16,542 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-23 06:47:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:47:16,543 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-23 06:47:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:16,544 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:47:16,544 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:47:16,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:47:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:47:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-23 06:47:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:47:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-23 06:47:16,549 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-12-23 06:47:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:16,549 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-23 06:47:16,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:47:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-23 06:47:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:47:16,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:16,550 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:16,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:47:16,766 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:16,766 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2020-12-23 06:47:16,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:16,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442753198] [2020-12-23 06:47:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:17,124 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 06:47:17,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442753198] [2020-12-23 06:47:17,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247128321] [2020-12-23 06:47:17,125 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 06:47:17,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 06:47:17,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:47:17,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:17,780 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 06:47:17,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:17,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:47:17,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267320589] [2020-12-23 06:47:17,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:47:17,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:47:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:47:17,783 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2020-12-23 06:47:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:17,865 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-23 06:47:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:47:17,866 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-23 06:47:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:17,867 INFO L225 Difference]: With dead ends: 56 [2020-12-23 06:47:17,867 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 06:47:17,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:47:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 06:47:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-23 06:47:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 06:47:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-23 06:47:17,884 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-12-23 06:47:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:17,884 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-23 06:47:17,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:47:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-23 06:47:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:47:17,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:17,885 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:18,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:47:18,092 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:18,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2020-12-23 06:47:18,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:18,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097027041] [2020-12-23 06:47:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:18,476 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 06:47:18,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097027041] [2020-12-23 06:47:18,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102353720] [2020-12-23 06:47:18,477 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 06:47:18,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:47:18,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:47:18,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:18,619 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 06:47:18,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:18,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:47:18,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341295741] [2020-12-23 06:47:18,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:47:18,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:18,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:47:18,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:47:18,622 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2020-12-23 06:47:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:18,697 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-23 06:47:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:47:18,698 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-12-23 06:47:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:18,699 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:47:18,699 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 06:47:18,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:47:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 06:47:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-23 06:47:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 06:47:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-23 06:47:18,702 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-12-23 06:47:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:18,703 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-23 06:47:18,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:47:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-23 06:47:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:47:18,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:18,704 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:18,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:18,917 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:18,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:18,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2020-12-23 06:47:18,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:18,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136210037] [2020-12-23 06:47:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:19,353 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 06:47:19,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136210037] [2020-12-23 06:47:19,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319546721] [2020-12-23 06:47:19,354 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 06:47:19,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 06:47:19,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:47:19,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:19,761 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 06:47:19,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:19,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 06:47:19,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469523221] [2020-12-23 06:47:19,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:47:19,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:19,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:47:19,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:47:19,763 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2020-12-23 06:47:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:19,867 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-23 06:47:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:47:19,867 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-12-23 06:47:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:19,868 INFO L225 Difference]: With dead ends: 60 [2020-12-23 06:47:19,868 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 06:47:19,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:47:19,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 06:47:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-23 06:47:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 06:47:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-23 06:47:19,872 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-12-23 06:47:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:19,872 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-23 06:47:19,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:47:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-23 06:47:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:47:19,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:19,873 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:20,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:47:20,088 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:20,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2020-12-23 06:47:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:20,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654656862] [2020-12-23 06:47:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:20,561 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 06:47:20,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654656862] [2020-12-23 06:47:20,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447797370] [2020-12-23 06:47:20,561 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 [2020-12-23 06:47:23,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:47:23,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:23,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:47:23,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:23,650 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 06:47:23,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:23,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 06:47:23,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624803319] [2020-12-23 06:47:23,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:47:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:23,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:47:23,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:47:23,652 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2020-12-23 06:47:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:23,760 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-23 06:47:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:47:23,761 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-12-23 06:47:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:23,761 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:47:23,761 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 06:47:23,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:47:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 06:47:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-23 06:47:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 06:47:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-23 06:47:23,765 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-12-23 06:47:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:23,765 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-23 06:47:23,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:47:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-23 06:47:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 06:47:23,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:23,766 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:23,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:23,980 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2020-12-23 06:47:23,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:23,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699899064] [2020-12-23 06:47:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:24,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699899064] [2020-12-23 06:47:24,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893569010] [2020-12-23 06:47:24,441 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:24,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:47:24,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:24,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:24,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:47:24,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973539283] [2020-12-23 06:47:24,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:47:24,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:24,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:47:24,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:47:24,589 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2020-12-23 06:47:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:24,684 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-23 06:47:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:47:24,685 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-23 06:47:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:24,686 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:47:24,686 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 06:47:24,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:47:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 06:47:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-23 06:47:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 06:47:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-23 06:47:24,690 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-12-23 06:47:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:24,690 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-23 06:47:24,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:47:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-23 06:47:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 06:47:24,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:24,691 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:24,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:47:24,906 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:24,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2020-12-23 06:47:24,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:24,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337952736] [2020-12-23 06:47:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:25,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337952736] [2020-12-23 06:47:25,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964760293] [2020-12-23 06:47:25,438 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:25,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:25,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:25,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:47:25,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:25,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:25,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 06:47:25,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848641460] [2020-12-23 06:47:25,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:47:25,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:47:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:47:25,589 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2020-12-23 06:47:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:25,685 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-23 06:47:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:47:25,686 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-23 06:47:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:25,686 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:47:25,686 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:47:25,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:47:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:47:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-23 06:47:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 06:47:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-23 06:47:25,690 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-12-23 06:47:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:25,690 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-23 06:47:25,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:47:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-23 06:47:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 06:47:25,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:25,691 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:25,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:47:25,905 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2020-12-23 06:47:25,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:25,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015290898] [2020-12-23 06:47:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015290898] [2020-12-23 06:47:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560780689] [2020-12-23 06:47:26,428 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:27,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 06:47:27,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:27,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:47:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:27,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:27,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:47:27,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874770494] [2020-12-23 06:47:27,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:47:27,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:47:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:47:27,336 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2020-12-23 06:47:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:27,432 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-23 06:47:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:47:27,432 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-12-23 06:47:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:27,433 INFO L225 Difference]: With dead ends: 68 [2020-12-23 06:47:27,433 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 06:47:27,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:47:27,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 06:47:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-23 06:47:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 06:47:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-23 06:47:27,437 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-12-23 06:47:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:27,437 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-23 06:47:27,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:47:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-23 06:47:27,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 06:47:27,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:27,438 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:27,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:47:27,648 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:27,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2020-12-23 06:47:27,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:27,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159972449] [2020-12-23 06:47:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:28,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159972449] [2020-12-23 06:47:28,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221481404] [2020-12-23 06:47:28,220 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:28,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:47:28,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:28,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:47:28,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:28,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:28,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 06:47:28,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460052672] [2020-12-23 06:47:28,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:47:28,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:28,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:47:28,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:47:28,402 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2020-12-23 06:47:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:28,514 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-23 06:47:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:47:28,515 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-23 06:47:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:28,515 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:47:28,516 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:47:28,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:47:28,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:47:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-23 06:47:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 06:47:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-23 06:47:28,520 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-12-23 06:47:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:28,520 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-23 06:47:28,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:47:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-23 06:47:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 06:47:28,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:28,521 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:28,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:47:28,737 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:28,737 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2020-12-23 06:47:28,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:28,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386538132] [2020-12-23 06:47:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:29,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386538132] [2020-12-23 06:47:29,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95224944] [2020-12-23 06:47:29,350 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:30,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 06:47:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:30,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:47:30,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:30,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:30,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 06:47:30,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929813229] [2020-12-23 06:47:30,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:47:30,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:47:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:47:30,369 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2020-12-23 06:47:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:30,481 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-23 06:47:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:47:30,482 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-23 06:47:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:30,483 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:47:30,483 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:47:30,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:47:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:47:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-23 06:47:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:47:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-23 06:47:30,487 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-12-23 06:47:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:30,487 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-23 06:47:30,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:47:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-23 06:47:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:47:30,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:30,488 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:30,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:30,702 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:30,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:30,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2020-12-23 06:47:30,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:30,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481379624] [2020-12-23 06:47:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:31,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481379624] [2020-12-23 06:47:31,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303260171] [2020-12-23 06:47:31,314 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:38,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 06:47:38,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:47:38,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:38,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:38,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:47:38,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074711049] [2020-12-23 06:47:38,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:47:38,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:38,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:47:38,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:47:38,181 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2020-12-23 06:47:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:38,294 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-23 06:47:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:47:38,295 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-23 06:47:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:38,295 INFO L225 Difference]: With dead ends: 74 [2020-12-23 06:47:38,295 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 06:47:38,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:47:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 06:47:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-23 06:47:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 06:47:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-23 06:47:38,299 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-12-23 06:47:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:38,299 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-23 06:47:38,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:47:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-23 06:47:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 06:47:38,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:38,300 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:38,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:38,515 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:38,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2020-12-23 06:47:38,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:38,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471524170] [2020-12-23 06:47:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:39,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471524170] [2020-12-23 06:47:39,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571159425] [2020-12-23 06:47:39,222 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:39,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:47:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:39,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:39,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:47:39,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883905370] [2020-12-23 06:47:39,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:47:39,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:39,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:47:39,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:47:39,382 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2020-12-23 06:47:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:39,494 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-23 06:47:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:47:39,495 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-12-23 06:47:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:39,496 INFO L225 Difference]: With dead ends: 76 [2020-12-23 06:47:39,496 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 06:47:39,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:47:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 06:47:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-23 06:47:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 06:47:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-23 06:47:39,500 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-12-23 06:47:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:39,500 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-23 06:47:39,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:47:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-23 06:47:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 06:47:39,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:39,501 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:39,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:39,718 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:39,719 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2020-12-23 06:47:39,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:39,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046114207] [2020-12-23 06:47:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:40,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046114207] [2020-12-23 06:47:40,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178129566] [2020-12-23 06:47:40,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:40,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:40,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:47:40,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:40,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:40,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 06:47:40,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678749285] [2020-12-23 06:47:40,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:47:40,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:40,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:47:40,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:47:40,606 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2020-12-23 06:47:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:40,765 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-23 06:47:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:47:40,766 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-12-23 06:47:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:40,767 INFO L225 Difference]: With dead ends: 78 [2020-12-23 06:47:40,768 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 06:47:40,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:47:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 06:47:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-23 06:47:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 06:47:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-23 06:47:40,777 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-12-23 06:47:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:40,777 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-23 06:47:40,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:47:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-23 06:47:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 06:47:40,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:40,779 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:40,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:47:40,992 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2020-12-23 06:47:40,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:40,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444738818] [2020-12-23 06:47:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:41,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444738818] [2020-12-23 06:47:41,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733341284] [2020-12-23 06:47:41,711 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:54,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 06:47:54,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:54,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:47:54,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:54,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:54,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 06:47:54,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415506079] [2020-12-23 06:47:54,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:47:54,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:54,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:47:54,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:47:54,520 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2020-12-23 06:47:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:54,647 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-23 06:47:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:47:54,648 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-23 06:47:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:54,649 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:47:54,649 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 06:47:54,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:47:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 06:47:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-23 06:47:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 06:47:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-23 06:47:54,653 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-12-23 06:47:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:54,653 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-23 06:47:54,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:47:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-23 06:47:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 06:47:54,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:54,654 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:54,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:54,871 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2020-12-23 06:47:54,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:54,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233534520] [2020-12-23 06:47:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:55,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233534520] [2020-12-23 06:47:55,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636755028] [2020-12-23 06:47:55,606 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:55,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:47:55,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:47:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:55,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:55,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 06:47:55,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133377750] [2020-12-23 06:47:55,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:47:55,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:55,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:47:55,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:47:55,788 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2020-12-23 06:47:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:55,915 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-23 06:47:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:47:55,921 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-12-23 06:47:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:55,922 INFO L225 Difference]: With dead ends: 82 [2020-12-23 06:47:55,922 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 06:47:55,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:47:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 06:47:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-23 06:47:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 06:47:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-23 06:47:55,927 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-12-23 06:47:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:55,927 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-23 06:47:55,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:47:55,927 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-23 06:47:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 06:47:55,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:55,928 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:56,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:47:56,142 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:56,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2020-12-23 06:47:56,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:56,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175339949] [2020-12-23 06:47:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:57,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175339949] [2020-12-23 06:47:57,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102132565] [2020-12-23 06:47:57,038 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:58,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 06:47:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:47:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:58,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:58,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 06:47:58,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649123847] [2020-12-23 06:47:58,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:47:58,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:58,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:47:58,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:47:58,259 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2020-12-23 06:47:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:58,404 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-12-23 06:47:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:47:58,405 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-23 06:47:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:58,406 INFO L225 Difference]: With dead ends: 84 [2020-12-23 06:47:58,406 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 06:47:58,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:47:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 06:47:58,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-23 06:47:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 06:47:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-12-23 06:47:58,411 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-12-23 06:47:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:58,411 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-12-23 06:47:58,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:47:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-12-23 06:47:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 06:47:58,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:58,412 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:58,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:58,625 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:58,625 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2020-12-23 06:47:58,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:58,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838656237] [2020-12-23 06:47:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:59,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838656237] [2020-12-23 06:47:59,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348633324] [2020-12-23 06:47:59,452 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:48:28,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 06:48:28,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:48:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:48:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:48:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:48:28,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:48:28,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:48:28,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147208203] [2020-12-23 06:48:28,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:48:28,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:48:28,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:48:29,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:48:29,000 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2020-12-23 06:48:29,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:48:29,146 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-23 06:48:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:48:29,147 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-23 06:48:29,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:48:29,148 INFO L225 Difference]: With dead ends: 86 [2020-12-23 06:48:29,148 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 06:48:29,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:48:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 06:48:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-23 06:48:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 06:48:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-12-23 06:48:29,152 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-12-23 06:48:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:48:29,152 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-12-23 06:48:29,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:48:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-12-23 06:48:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 06:48:29,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:48:29,153 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:48:29,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:48:29,354 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:48:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:48:29,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2020-12-23 06:48:29,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:48:29,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178938232] [2020-12-23 06:48:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:48:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:48:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:48:30,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178938232] [2020-12-23 06:48:30,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812843285] [2020-12-23 06:48:30,367 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:48:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:48:30,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:48:30,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:48:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:48:30,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:48:30,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:48:30,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622463208] [2020-12-23 06:48:30,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:48:30,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:48:30,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:48:30,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:48:30,569 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2020-12-23 06:48:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:48:30,722 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-12-23 06:48:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:48:30,722 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-23 06:48:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:48:30,723 INFO L225 Difference]: With dead ends: 88 [2020-12-23 06:48:30,723 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 06:48:30,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:48:30,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 06:48:30,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-23 06:48:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 06:48:30,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-23 06:48:30,728 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-12-23 06:48:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:48:30,728 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-23 06:48:30,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:48:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-23 06:48:30,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 06:48:30,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:48:30,729 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2020-12-23 06:48:30,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:48:30,943 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:48:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:48:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2020-12-23 06:48:30,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:48:30,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32011234] [2020-12-23 06:48:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:48:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:48:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:48:31,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32011234] [2020-12-23 06:48:31,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620653944] [2020-12-23 06:48:31,986 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:48:32,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:48:32,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:48:32,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:48:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:48:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:48:32,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:48:32,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 06:48:32,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472195995] [2020-12-23 06:48:32,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:48:32,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:48:32,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:48:32,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:48:32,178 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2020-12-23 06:48:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:48:32,336 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-12-23 06:48:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:48:32,337 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2020-12-23 06:48:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:48:32,339 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:48:32,339 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:48:32,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:48:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:48:32,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 06:48:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 06:48:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-12-23 06:48:32,343 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-12-23 06:48:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:48:32,344 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-12-23 06:48:32,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:48:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-12-23 06:48:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 06:48:32,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:48:32,345 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2020-12-23 06:48:32,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:48:32,559 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:48:32,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:48:32,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2020-12-23 06:48:32,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:48:32,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607372688] [2020-12-23 06:48:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:48:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:48:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:48:33,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607372688] [2020-12-23 06:48:33,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25632210] [2020-12-23 06:48:33,634 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:50:07,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 06:50:07,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:50:08,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:50:08,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:50:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:08,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:50:08,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 06:50:08,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470078591] [2020-12-23 06:50:08,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:50:08,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:50:08,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:50:08,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:50:08,192 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2020-12-23 06:50:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:50:08,340 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-12-23 06:50:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:50:08,340 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2020-12-23 06:50:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:50:08,341 INFO L225 Difference]: With dead ends: 92 [2020-12-23 06:50:08,341 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 06:50:08,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:50:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 06:50:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 06:50:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 06:50:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-12-23 06:50:08,345 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-12-23 06:50:08,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:50:08,346 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-12-23 06:50:08,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:50:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-12-23 06:50:08,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 06:50:08,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:50:08,347 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2020-12-23 06:50:08,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:50:08,561 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:50:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:50:08,562 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2020-12-23 06:50:08,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:50:08,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913745586] [2020-12-23 06:50:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:50:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:50:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:09,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913745586] [2020-12-23 06:50:09,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082687683] [2020-12-23 06:50:09,724 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:50:09,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:50:09,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:50:09,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:50:09,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:50:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:09,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:50:09,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 06:50:09,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744853357] [2020-12-23 06:50:09,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:50:09,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:50:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:50:09,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:50:09,917 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2020-12-23 06:50:10,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:50:10,101 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-23 06:50:10,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:50:10,102 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2020-12-23 06:50:10,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:50:10,103 INFO L225 Difference]: With dead ends: 94 [2020-12-23 06:50:10,103 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 06:50:10,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:50:10,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 06:50:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-23 06:50:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 06:50:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-12-23 06:50:10,107 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-12-23 06:50:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:50:10,108 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-12-23 06:50:10,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:50:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-12-23 06:50:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 06:50:10,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:50:10,109 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2020-12-23 06:50:10,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:50:10,323 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:50:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:50:10,324 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2020-12-23 06:50:10,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:50:10,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524768662] [2020-12-23 06:50:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:50:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:50:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:11,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524768662] [2020-12-23 06:50:11,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178959601] [2020-12-23 06:50:11,469 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:50:33,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 06:50:33,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:50:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:50:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:50:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:33,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:50:33,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 06:50:33,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77697401] [2020-12-23 06:50:33,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:50:33,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:50:33,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:50:33,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:50:33,890 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2020-12-23 06:50:34,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:50:34,065 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-12-23 06:50:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:50:34,066 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2020-12-23 06:50:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:50:34,067 INFO L225 Difference]: With dead ends: 96 [2020-12-23 06:50:34,067 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 06:50:34,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:50:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 06:50:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-23 06:50:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 06:50:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-23 06:50:34,071 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-12-23 06:50:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:50:34,071 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-23 06:50:34,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:50:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-23 06:50:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 06:50:34,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:50:34,072 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2020-12-23 06:50:34,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 06:50:34,273 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:50:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:50:34,274 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2020-12-23 06:50:34,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:50:34,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292769478] [2020-12-23 06:50:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:50:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:50:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:50:35,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292769478] [2020-12-23 06:50:35,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888827197] [2020-12-23 06:50:35,503 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true