/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/recursive-simple/sum_20x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:21:10,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:21:10,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:21:10,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:21:10,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:21:10,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:21:10,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:21:10,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:21:10,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:21:10,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:21:10,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:21:10,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:21:10,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:21:10,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:21:10,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:21:10,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:21:10,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:21:10,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:21:10,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:21:10,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:21:10,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:21:10,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:21:10,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:21:10,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:21:10,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:21:10,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:21:10,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:21:10,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:21:10,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:21:10,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:21:10,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:21:10,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:21:10,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:21:10,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:21:10,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:21:10,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:21:10,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:21:11,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:21:11,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:21:11,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:21:11,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:21:11,007 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:21:11,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:21:11,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:21:11,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:21:11,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:21:11,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:21:11,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:21:11,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:21:11,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:21:11,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:21:11,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:21:11,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:21:11,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:21:11,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:21:11,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:21:11,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:21:11,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:21:11,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:21:11,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:21:11,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:21:11,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:21:11,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:21:11,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:21:11,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:21:11,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:21:11,388 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:21:11,388 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:21:11,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2021-01-06 19:21:11,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e3387e54/9dfc0b286ce149dfbd8236d96454a93d/FLAG625578933 [2021-01-06 19:21:12,027 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:21:12,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2021-01-06 19:21:12,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e3387e54/9dfc0b286ce149dfbd8236d96454a93d/FLAG625578933 [2021-01-06 19:21:12,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e3387e54/9dfc0b286ce149dfbd8236d96454a93d [2021-01-06 19:21:12,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:21:12,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:21:12,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:21:12,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:21:12,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:21:12,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ae36ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12, skipping insertion in model container [2021-01-06 19:21:12,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:21:12,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:21:12,635 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/recursive-simple/sum_20x0-1.c[481,494] [2021-01-06 19:21:12,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:21:12,649 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:21:12,666 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/recursive-simple/sum_20x0-1.c[481,494] [2021-01-06 19:21:12,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:21:12,682 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:21:12,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12 WrapperNode [2021-01-06 19:21:12,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:21:12,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:21:12,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:21:12,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:21:12,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:21:12,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:21:12,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:21:12,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:21:12,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (1/1) ... [2021-01-06 19:21:12,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:21:12,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:21:12,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:21:12,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:21:12,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:21:12,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:21:12,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:21:12,859 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-01-06 19:21:12,859 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-01-06 19:21:12,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:21:12,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:21:13,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:21:13,152 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:21:13,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:21:13 BoogieIcfgContainer [2021-01-06 19:21:13,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:21:13,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:21:13,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:21:13,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:21:13,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:21:12" (1/3) ... [2021-01-06 19:21:13,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337c2fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:21:13, skipping insertion in model container [2021-01-06 19:21:13,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:12" (2/3) ... [2021-01-06 19:21:13,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337c2fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:21:13, skipping insertion in model container [2021-01-06 19:21:13,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:21:13" (3/3) ... [2021-01-06 19:21:13,163 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2021-01-06 19:21:13,169 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:21:13,173 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:21:13,193 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:21:13,218 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:21:13,218 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:21:13,219 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:21:13,219 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:21:13,219 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:21:13,219 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:21:13,219 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:21:13,219 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:21:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 19:21:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:21:13,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:13,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:13,244 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:13,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:13,251 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-01-06 19:21:13,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:13,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644861376] [2021-01-06 19:21:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:21:13,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644861376] [2021-01-06 19:21:13,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:21:13,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:21:13,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411763190] [2021-01-06 19:21:13,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:21:13,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:13,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:21:13,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:21:13,556 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2021-01-06 19:21:13,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:13,655 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-01-06 19:21:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:21:13,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 19:21:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:13,667 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:21:13,667 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 19:21:13,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:21:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 19:21:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 19:21:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 19:21:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 19:21:13,710 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-01-06 19:21:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:13,710 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 19:21:13,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:21:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 19:21:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 19:21:13,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:13,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:13,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:21:13,713 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:13,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:13,714 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-01-06 19:21:13,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:13,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972206126] [2021-01-06 19:21:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:21:13,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972206126] [2021-01-06 19:21:13,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277880685] [2021-01-06 19:21:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:21:13,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:21:14,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:14,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 19:21:14,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281487189] [2021-01-06 19:21:14,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 19:21:14,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:14,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 19:21:14,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:21:14,072 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2021-01-06 19:21:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:14,140 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 19:21:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:21:14,141 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 19:21:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:14,142 INFO L225 Difference]: With dead ends: 22 [2021-01-06 19:21:14,142 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 19:21:14,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:21:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 19:21:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 19:21:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 19:21:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 19:21:14,150 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-01-06 19:21:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:14,150 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 19:21:14,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 19:21:14,150 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 19:21:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 19:21:14,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:14,152 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:14,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 19:21:14,367 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:14,369 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-01-06 19:21:14,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:14,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104365061] [2021-01-06 19:21:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:14,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:14,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:14,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:21:14,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104365061] [2021-01-06 19:21:14,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853728348] [2021-01-06 19:21:14,542 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 [2021-01-06 19:21:14,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:14,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:14,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 19:21:14,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:21:14,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:14,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 19:21:14,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038578052] [2021-01-06 19:21:14,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:21:14,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:14,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:21:14,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:21:14,709 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2021-01-06 19:21:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:14,816 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-01-06 19:21:14,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:21:14,819 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2021-01-06 19:21:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:14,821 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:21:14,821 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 19:21:14,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:21:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 19:21:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 19:21:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 19:21:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 19:21:14,829 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-01-06 19:21:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:14,829 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 19:21:14,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:21:14,830 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 19:21:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 19:21:14,831 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:14,831 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:15,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:15,045 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-01-06 19:21:15,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:15,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364944106] [2021-01-06 19:21:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:15,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:15,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:15,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:15,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:21:15,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364944106] [2021-01-06 19:21:15,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260134980] [2021-01-06 19:21:15,369 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 [2021-01-06 19:21:15,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 19:21:15,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:15,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 19:21:15,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:21:15,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:15,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 19:21:15,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392116084] [2021-01-06 19:21:15,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 19:21:15,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:15,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 19:21:15,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:21:15,583 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2021-01-06 19:21:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:15,706 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-06 19:21:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 19:21:15,707 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2021-01-06 19:21:15,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:15,708 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:21:15,709 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 19:21:15,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-01-06 19:21:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 19:21:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 19:21:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 19:21:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 19:21:15,716 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-01-06 19:21:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:15,716 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 19:21:15,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 19:21:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 19:21:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 19:21:15,718 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:15,718 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:15,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:15,933 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-01-06 19:21:15,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:15,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964653975] [2021-01-06 19:21:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:15,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:21:16,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964653975] [2021-01-06 19:21:16,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528917273] [2021-01-06 19:21:16,140 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 [2021-01-06 19:21:16,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:21:16,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:16,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 19:21:16,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:21:16,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:16,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 19:21:16,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275500045] [2021-01-06 19:21:16,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 19:21:16,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:16,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 19:21:16,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:21:16,324 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2021-01-06 19:21:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:16,537 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-01-06 19:21:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:21:16,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2021-01-06 19:21:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:16,540 INFO L225 Difference]: With dead ends: 31 [2021-01-06 19:21:16,541 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 19:21:16,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:21:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 19:21:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 19:21:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 19:21:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 19:21:16,551 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-01-06 19:21:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:16,551 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 19:21:16,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 19:21:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 19:21:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:21:16,555 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:16,556 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:16,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:16,766 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:16,767 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-01-06 19:21:16,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:16,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465308244] [2021-01-06 19:21:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:21:17,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465308244] [2021-01-06 19:21:17,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946872054] [2021-01-06 19:21:17,024 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 [2021-01-06 19:21:17,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 19:21:17,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 19:21:17,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:21:17,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:17,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 19:21:17,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263751634] [2021-01-06 19:21:17,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:21:17,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:17,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:21:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:21:17,184 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2021-01-06 19:21:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:17,283 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 19:21:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 19:21:17,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2021-01-06 19:21:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:17,285 INFO L225 Difference]: With dead ends: 34 [2021-01-06 19:21:17,285 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 19:21:17,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:21:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 19:21:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 19:21:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 19:21:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 19:21:17,292 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-01-06 19:21:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:17,293 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 19:21:17,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:21:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 19:21:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 19:21:17,295 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:17,295 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:17,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 19:21:17,511 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:17,512 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-01-06 19:21:17,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:17,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98416139] [2021-01-06 19:21:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:21:17,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98416139] [2021-01-06 19:21:17,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005317768] [2021-01-06 19:21:17,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:17,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 19:21:17,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:17,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:21:17,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:21:17,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:17,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 19:21:17,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658646042] [2021-01-06 19:21:17,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:21:17,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:21:17,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:21:17,994 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2021-01-06 19:21:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:18,095 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-01-06 19:21:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:21:18,096 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2021-01-06 19:21:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:18,097 INFO L225 Difference]: With dead ends: 37 [2021-01-06 19:21:18,097 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 19:21:18,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-01-06 19:21:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 19:21:18,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 19:21:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 19:21:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 19:21:18,105 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-01-06 19:21:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:18,105 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 19:21:18,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:21:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 19:21:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 19:21:18,107 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:18,107 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:18,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:18,321 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:18,323 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-01-06 19:21:18,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:18,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566956309] [2021-01-06 19:21:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 19:21:18,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566956309] [2021-01-06 19:21:18,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427479137] [2021-01-06 19:21:18,565 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 [2021-01-06 19:21:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 19:21:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 19:21:18,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:18,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 19:21:18,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879353377] [2021-01-06 19:21:18,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 19:21:18,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:18,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 19:21:18,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 19:21:18,767 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2021-01-06 19:21:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:18,940 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-01-06 19:21:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 19:21:18,940 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2021-01-06 19:21:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:18,942 INFO L225 Difference]: With dead ends: 40 [2021-01-06 19:21:18,942 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 19:21:18,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-01-06 19:21:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 19:21:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 19:21:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 19:21:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 19:21:18,949 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-01-06 19:21:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:18,950 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 19:21:18,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 19:21:18,950 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 19:21:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 19:21:18,951 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:18,951 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:19,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:19,166 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:19,168 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-01-06 19:21:19,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:19,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153722877] [2021-01-06 19:21:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 19:21:19,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153722877] [2021-01-06 19:21:19,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931853819] [2021-01-06 19:21:19,433 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 [2021-01-06 19:21:19,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:19,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:19,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 19:21:19,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 19:21:19,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:19,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 19:21:19,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496277960] [2021-01-06 19:21:19,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 19:21:19,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:19,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 19:21:19,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:21:19,607 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2021-01-06 19:21:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:19,776 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-01-06 19:21:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 19:21:19,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2021-01-06 19:21:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:19,779 INFO L225 Difference]: With dead ends: 43 [2021-01-06 19:21:19,779 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 19:21:19,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-01-06 19:21:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 19:21:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 19:21:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 19:21:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 19:21:19,787 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-01-06 19:21:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:19,787 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 19:21:19,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 19:21:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 19:21:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:21:19,789 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:19,789 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:20,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 19:21:20,004 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:20,006 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-01-06 19:21:20,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:20,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52404112] [2021-01-06 19:21:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 19:21:20,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52404112] [2021-01-06 19:21:20,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445490820] [2021-01-06 19:21:20,328 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 [2021-01-06 19:21:20,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 19:21:20,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:20,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 19:21:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 19:21:20,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:20,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 19:21:20,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982879823] [2021-01-06 19:21:20,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 19:21:20,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:20,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 19:21:20,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:21:20,576 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2021-01-06 19:21:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:20,747 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-01-06 19:21:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 19:21:20,747 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2021-01-06 19:21:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:20,749 INFO L225 Difference]: With dead ends: 46 [2021-01-06 19:21:20,749 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 19:21:20,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2021-01-06 19:21:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 19:21:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 19:21:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 19:21:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 19:21:20,757 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-01-06 19:21:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:20,757 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 19:21:20,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 19:21:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 19:21:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 19:21:20,759 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:20,759 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:20,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:20,973 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:20,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-01-06 19:21:20,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:20,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291656419] [2021-01-06 19:21:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 19:21:21,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291656419] [2021-01-06 19:21:21,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075670405] [2021-01-06 19:21:21,345 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 [2021-01-06 19:21:21,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:21:21,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:21,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 19:21:21,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 19:21:21,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:21,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 19:21:21,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256839085] [2021-01-06 19:21:21,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 19:21:21,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:21,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 19:21:21,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:21:21,587 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2021-01-06 19:21:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:21,737 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-01-06 19:21:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 19:21:21,738 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2021-01-06 19:21:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:21,739 INFO L225 Difference]: With dead ends: 49 [2021-01-06 19:21:21,739 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 19:21:21,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2021-01-06 19:21:21,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 19:21:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 19:21:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 19:21:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 19:21:21,746 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-01-06 19:21:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:21,747 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 19:21:21,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 19:21:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 19:21:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 19:21:21,748 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:21,748 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:21,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:21,963 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:21,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-01-06 19:21:21,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:21,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636292184] [2021-01-06 19:21:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 19:21:22,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636292184] [2021-01-06 19:21:22,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631723174] [2021-01-06 19:21:22,349 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 [2021-01-06 19:21:22,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 19:21:22,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:22,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 19:21:22,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 19:21:22,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:22,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 19:21:22,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781932385] [2021-01-06 19:21:22,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:21:22,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:21:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:21:22,560 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2021-01-06 19:21:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:22,737 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-01-06 19:21:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 19:21:22,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2021-01-06 19:21:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:22,738 INFO L225 Difference]: With dead ends: 52 [2021-01-06 19:21:22,738 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 19:21:22,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2021-01-06 19:21:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 19:21:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 19:21:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 19:21:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 19:21:22,746 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-01-06 19:21:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:22,746 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 19:21:22,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:21:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 19:21:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 19:21:22,748 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:22,748 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:22,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 19:21:22,963 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:22,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-01-06 19:21:22,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:22,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504562169] [2021-01-06 19:21:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 19:21:23,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504562169] [2021-01-06 19:21:23,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514831240] [2021-01-06 19:21:23,461 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 [2021-01-06 19:21:23,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 19:21:23,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:23,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 19:21:23,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 19:21:23,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:23,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 19:21:23,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397954928] [2021-01-06 19:21:23,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 19:21:23,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:23,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 19:21:23,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:21:23,703 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2021-01-06 19:21:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:23,929 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-01-06 19:21:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 19:21:23,930 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2021-01-06 19:21:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:23,931 INFO L225 Difference]: With dead ends: 55 [2021-01-06 19:21:23,931 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 19:21:23,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2021-01-06 19:21:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 19:21:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 19:21:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 19:21:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-01-06 19:21:23,938 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-01-06 19:21:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:23,939 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-01-06 19:21:23,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 19:21:23,939 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-01-06 19:21:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 19:21:23,940 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:23,940 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:24,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 19:21:24,154 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:24,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:24,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-01-06 19:21:24,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:24,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6605599] [2021-01-06 19:21:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-01-06 19:21:24,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6605599] [2021-01-06 19:21:24,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849154713] [2021-01-06 19:21:24,657 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 [2021-01-06 19:21:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 19:21:24,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-01-06 19:21:24,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:24,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 19:21:24,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899758324] [2021-01-06 19:21:24,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 19:21:24,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:24,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 19:21:24,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-01-06 19:21:24,922 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2021-01-06 19:21:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:25,125 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-01-06 19:21:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 19:21:25,125 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2021-01-06 19:21:25,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:25,127 INFO L225 Difference]: With dead ends: 58 [2021-01-06 19:21:25,127 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 19:21:25,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 19:21:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 19:21:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 19:21:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 19:21:25,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-01-06 19:21:25,134 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-01-06 19:21:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:25,134 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-01-06 19:21:25,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 19:21:25,135 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-01-06 19:21:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 19:21:25,136 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:25,136 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:25,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 19:21:25,350 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-01-06 19:21:25,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:25,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541585235] [2021-01-06 19:21:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-01-06 19:21:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541585235] [2021-01-06 19:21:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327290823] [2021-01-06 19:21:25,911 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 [2021-01-06 19:21:25,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:25,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:25,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 19:21:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-01-06 19:21:26,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:26,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 19:21:26,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109935110] [2021-01-06 19:21:26,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 19:21:26,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 19:21:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-01-06 19:21:26,149 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2021-01-06 19:21:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:26,419 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-01-06 19:21:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 19:21:26,420 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2021-01-06 19:21:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:26,421 INFO L225 Difference]: With dead ends: 61 [2021-01-06 19:21:26,421 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 19:21:26,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 19:21:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 19:21:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 19:21:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 19:21:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-01-06 19:21:26,430 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-01-06 19:21:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:26,430 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-01-06 19:21:26,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 19:21:26,431 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-01-06 19:21:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 19:21:26,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:26,432 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:26,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:26,646 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:26,647 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-01-06 19:21:26,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:26,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754655719] [2021-01-06 19:21:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:26,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:26,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:26,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:26,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:26,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:26,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:26,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:26,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:26,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-01-06 19:21:27,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754655719] [2021-01-06 19:21:27,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066703511] [2021-01-06 19:21:27,298 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 [2021-01-06 19:21:27,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 19:21:27,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 19:21:27,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-01-06 19:21:27,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:27,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 19:21:27,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972132001] [2021-01-06 19:21:27,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 19:21:27,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 19:21:27,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-01-06 19:21:27,587 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2021-01-06 19:21:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:27,848 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-01-06 19:21:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 19:21:27,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2021-01-06 19:21:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:27,850 INFO L225 Difference]: With dead ends: 64 [2021-01-06 19:21:27,850 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 19:21:27,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 19:21:27,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 19:21:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 19:21:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 19:21:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-01-06 19:21:27,857 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-01-06 19:21:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:27,857 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-01-06 19:21:27,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 19:21:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-01-06 19:21:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 19:21:27,859 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:27,859 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:28,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:21:28,075 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:28,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:28,076 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-01-06 19:21:28,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:28,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752113741] [2021-01-06 19:21:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 19:21:28,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752113741] [2021-01-06 19:21:28,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414684391] [2021-01-06 19:21:28,750 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 [2021-01-06 19:21:28,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:21:28,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:28,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 19:21:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 19:21:29,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:29,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 19:21:29,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643958944] [2021-01-06 19:21:29,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 19:21:29,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 19:21:29,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-01-06 19:21:29,024 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2021-01-06 19:21:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:29,265 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-01-06 19:21:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 19:21:29,266 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2021-01-06 19:21:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:29,267 INFO L225 Difference]: With dead ends: 67 [2021-01-06 19:21:29,267 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 19:21:29,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 19:21:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 19:21:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-06 19:21:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 19:21:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-01-06 19:21:29,274 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-01-06 19:21:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:29,274 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-01-06 19:21:29,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 19:21:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-01-06 19:21:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 19:21:29,276 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:29,276 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:29,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 19:21:29,490 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:29,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-01-06 19:21:29,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:29,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316877212] [2021-01-06 19:21:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 19:21:30,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316877212] [2021-01-06 19:21:30,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829049682] [2021-01-06 19:21:30,261 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 [2021-01-06 19:21:30,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 19:21:30,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:30,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 19:21:30,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 19:21:30,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:30,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 19:21:30,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33859608] [2021-01-06 19:21:30,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 19:21:30,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:30,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 19:21:30,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-01-06 19:21:30,591 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2021-01-06 19:21:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:30,849 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-01-06 19:21:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 19:21:30,850 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2021-01-06 19:21:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:30,851 INFO L225 Difference]: With dead ends: 70 [2021-01-06 19:21:30,851 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 19:21:30,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 19:21:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 19:21:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 19:21:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 19:21:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-01-06 19:21:30,857 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-01-06 19:21:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:30,857 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-01-06 19:21:30,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 19:21:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-01-06 19:21:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 19:21:30,859 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:30,859 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:31,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 19:21:31,073 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:31,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:31,074 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-01-06 19:21:31,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:31,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785655791] [2021-01-06 19:21:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-01-06 19:21:31,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785655791] [2021-01-06 19:21:31,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062681866] [2021-01-06 19:21:31,893 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 [2021-01-06 19:21:32,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 19:21:32,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:32,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 19:21:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-01-06 19:21:33,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:33,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43] total 63 [2021-01-06 19:21:33,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567310952] [2021-01-06 19:21:33,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 19:21:33,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:33,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 19:21:33,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 19:21:33,588 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 63 states. [2021-01-06 19:21:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:35,304 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-01-06 19:21:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 19:21:35,305 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 118 [2021-01-06 19:21:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:35,306 INFO L225 Difference]: With dead ends: 73 [2021-01-06 19:21:35,306 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 19:21:35,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2021-01-06 19:21:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 19:21:35,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-01-06 19:21:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 19:21:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-01-06 19:21:35,315 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-01-06 19:21:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:35,315 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-01-06 19:21:35,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 19:21:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-01-06 19:21:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 19:21:35,317 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:35,317 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:35,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:35,531 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:35,532 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-01-06 19:21:35,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:35,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51036981] [2021-01-06 19:21:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-01-06 19:21:36,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51036981] [2021-01-06 19:21:36,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72752847] [2021-01-06 19:21:36,420 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 [2021-01-06 19:21:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 19:21:36,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-01-06 19:21:36,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:36,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 19:21:36,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493294656] [2021-01-06 19:21:36,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 19:21:36,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:36,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 19:21:36,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2021-01-06 19:21:36,731 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2021-01-06 19:21:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:37,030 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-01-06 19:21:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 19:21:37,031 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2021-01-06 19:21:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:37,032 INFO L225 Difference]: With dead ends: 76 [2021-01-06 19:21:37,032 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 19:21:37,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 19:21:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 19:21:37,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 19:21:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 19:21:37,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-01-06 19:21:37,037 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-01-06 19:21:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:37,038 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-01-06 19:21:37,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 19:21:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-01-06 19:21:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 19:21:37,040 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:37,040 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:37,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:37,255 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:37,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-01-06 19:21:37,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:37,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555959019] [2021-01-06 19:21:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 19:21:37,296 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 19:21:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 19:21:37,338 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 19:21:37,372 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 19:21:37,372 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 19:21:37,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-01-06 19:21:37,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:21:37 BoogieIcfgContainer [2021-01-06 19:21:37,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:21:37,458 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:21:37,458 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:21:37,458 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:21:37,458 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:21:13" (3/4) ... [2021-01-06 19:21:37,460 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 19:21:37,531 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_20x0-1.c-witness.graphml [2021-01-06 19:21:37,531 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:21:37,533 INFO L168 Benchmark]: Toolchain (without parser) took 25075.19 ms. Allocated memory was 161.5 MB in the beginning and 486.5 MB in the end (delta: 325.1 MB). Free memory was 136.3 MB in the beginning and 332.0 MB in the end (delta: -195.7 MB). Peak memory consumption was 130.7 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:37,533 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 161.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:21:37,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.44 ms. Allocated memory is still 161.5 MB. Free memory was 136.2 MB in the beginning and 127.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:37,534 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.37 ms. Allocated memory is still 161.5 MB. Free memory was 127.0 MB in the beginning and 125.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:37,535 INFO L168 Benchmark]: Boogie Preprocessor took 19.14 ms. Allocated memory is still 161.5 MB. Free memory was 125.7 MB in the beginning and 124.8 MB in the end (delta: 858.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:37,535 INFO L168 Benchmark]: RCFGBuilder took 414.60 ms. Allocated memory is still 161.5 MB. Free memory was 124.7 MB in the beginning and 113.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:37,536 INFO L168 Benchmark]: TraceAbstraction took 24301.73 ms. Allocated memory was 161.5 MB in the beginning and 486.5 MB in the end (delta: 325.1 MB). Free memory was 113.1 MB in the beginning and 338.9 MB in the end (delta: -225.8 MB). Peak memory consumption was 100.3 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:37,536 INFO L168 Benchmark]: Witness Printer took 73.74 ms. Allocated memory is still 486.5 MB. Free memory was 338.3 MB in the beginning and 332.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:37,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 161.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 221.44 ms. Allocated memory is still 161.5 MB. Free memory was 136.2 MB in the beginning and 127.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 34.37 ms. Allocated memory is still 161.5 MB. Free memory was 127.0 MB in the beginning and 125.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.14 ms. Allocated memory is still 161.5 MB. Free memory was 125.7 MB in the beginning and 124.8 MB in the end (delta: 858.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 414.60 ms. Allocated memory is still 161.5 MB. Free memory was 124.7 MB in the beginning and 113.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24301.73 ms. Allocated memory was 161.5 MB in the beginning and 486.5 MB in the end (delta: 325.1 MB). Free memory was 113.1 MB in the beginning and 338.9 MB in the end (delta: -225.8 MB). Peak memory consumption was 100.3 MB. Max. memory is 8.0 GB. * Witness Printer took 73.74 ms. Allocated memory is still 486.5 MB. Free memory was 338.3 MB in the beginning and 332.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 20; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24.1s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 738 SDslu, 926 SDs, 0 SdLazy, 1005 SolverSat, 233 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2230 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4480 ImplicationChecksByTransitivity, 7.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 12.0s InterpolantComputationTime, 2800 NumberOfCodeBlocks, 2800 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2631 ConstructedInterpolants, 0 QuantifiedInterpolants, 588195 SizeOfPredicates, 231 NumberOfNonLiveVariables, 4522 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...