/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/loops-crafted-1/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:06:43,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:06:43,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:06:43,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:06:43,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:06:43,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:06:43,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:06:43,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:06:43,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:06:43,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:06:43,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:06:43,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:06:43,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:06:43,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:06:43,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:06:43,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:06:43,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:06:43,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:06:43,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:06:43,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:06:43,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:06:43,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:06:43,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:06:43,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:06:43,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:06:43,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:06:43,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:06:43,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:06:43,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:06:43,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:06:43,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:06:43,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:06:43,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:06:43,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:06:43,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:06:43,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:06:43,182 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 17:06:43,215 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:06:43,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:06:43,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:06:43,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:06:43,217 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:06:43,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:06:43,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:06:43,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:06:43,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:06:43,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:06:43,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:06:43,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:06:43,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:06:43,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:06:43,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:06:43,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:06:43,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:06:43,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:06:43,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:06:43,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:06:43,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:06:43,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:06:43,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:06:43,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:06:43,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:06:43,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:06:43,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:06:43,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:06:43,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:06:43,708 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:06:43,709 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:06:43,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/sumt8.c [2021-01-06 17:06:43,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e93870ab0/b3b69ea7e4634758990d25e12c01746a/FLAG55d917175 [2021-01-06 17:06:44,352 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:06:44,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/sumt8.c [2021-01-06 17:06:44,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e93870ab0/b3b69ea7e4634758990d25e12c01746a/FLAG55d917175 [2021-01-06 17:06:44,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e93870ab0/b3b69ea7e4634758990d25e12c01746a [2021-01-06 17:06:44,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:06:44,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:06:44,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:06:44,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:06:44,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:06:44,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:06:44" (1/1) ... [2021-01-06 17:06:44,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@293215f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:44, skipping insertion in model container [2021-01-06 17:06:44,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:06:44" (1/1) ... [2021-01-06 17:06:44,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:06:44,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:06:44,927 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/loops-crafted-1/sumt8.c[403,416] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~v5~0,] left hand side expression in assignment: lhs: VariableLHS[~v1~0,] left hand side expression in assignment: lhs: VariableLHS[~v2~0,] left hand side expression in assignment: lhs: VariableLHS[~v3~0,] left hand side expression in assignment: lhs: VariableLHS[~v4~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] [2021-01-06 17:06:44,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:06:44,961 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:06:44,976 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/loops-crafted-1/sumt8.c[403,416] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~v5~0,] left hand side expression in assignment: lhs: VariableLHS[~v1~0,] left hand side expression in assignment: lhs: VariableLHS[~v2~0,] left hand side expression in assignment: lhs: VariableLHS[~v3~0,] left hand side expression in assignment: lhs: VariableLHS[~v4~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] [2021-01-06 17:06:44,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:06:45,003 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:06:45,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45 WrapperNode [2021-01-06 17:06:45,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:06:45,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:06:45,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:06:45,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:06:45,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (1/1) ... [2021-01-06 17:06:45,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (1/1) ... [2021-01-06 17:06:45,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:06:45,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:06:45,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:06:45,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:06:45,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (1/1) ... [2021-01-06 17:06:45,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (1/1) ... [2021-01-06 17:06:45,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (1/1) ... [2021-01-06 17:06:45,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (1/1) ... [2021-01-06 17:06:45,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (1/1) ... [2021-01-06 17:06:45,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (1/1) ... [2021-01-06 17:06:45,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (1/1) ... [2021-01-06 17:06:45,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:06:45,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:06:45,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:06:45,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:06:45,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (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 17:06:45,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:06:45,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:06:45,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:06:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:06:45,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:06:45,517 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 17:06:45,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:06:45 BoogieIcfgContainer [2021-01-06 17:06:45,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:06:45,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:06:45,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:06:45,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:06:45,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:06:44" (1/3) ... [2021-01-06 17:06:45,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d518012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:06:45, skipping insertion in model container [2021-01-06 17:06:45,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:06:45" (2/3) ... [2021-01-06 17:06:45,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d518012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:06:45, skipping insertion in model container [2021-01-06 17:06:45,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:06:45" (3/3) ... [2021-01-06 17:06:45,541 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2021-01-06 17:06:45,554 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:06:45,601 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 17:06:45,660 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 17:06:45,698 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:06:45,698 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:06:45,698 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:06:45,698 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:06:45,698 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:06:45,699 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:06:45,699 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:06:45,699 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:06:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-01-06 17:06:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:06:45,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:45,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:45,721 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:45,728 INFO L82 PathProgramCache]: Analyzing trace with hash 183352048, now seen corresponding path program 1 times [2021-01-06 17:06:45,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:45,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583844003] [2021-01-06 17:06:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:46,320 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 17:06:46,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583844003] [2021-01-06 17:06:46,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:06:46,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:06:46,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534449585] [2021-01-06 17:06:46,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:06:46,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:46,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:06:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:06:46,351 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2021-01-06 17:06:46,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:46,533 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2021-01-06 17:06:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:06:46,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 17:06:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:46,546 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:06:46,546 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 17:06:46,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:06:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 17:06:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 17:06:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:06:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2021-01-06 17:06:46,587 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 8 [2021-01-06 17:06:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:46,587 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2021-01-06 17:06:46,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:06:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2021-01-06 17:06:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:06:46,588 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:46,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:46,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:06:46,589 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:46,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:46,590 INFO L82 PathProgramCache]: Analyzing trace with hash 486052837, now seen corresponding path program 1 times [2021-01-06 17:06:46,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:46,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243859796] [2021-01-06 17:06:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:46,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243859796] [2021-01-06 17:06:46,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791452786] [2021-01-06 17:06:46,727 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 17:06:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:46,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:06:46,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:47,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:47,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2021-01-06 17:06:47,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205815872] [2021-01-06 17:06:47,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:06:47,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:47,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:06:47,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:06:47,210 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 9 states. [2021-01-06 17:06:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:47,458 INFO L93 Difference]: Finished difference Result 40 states and 61 transitions. [2021-01-06 17:06:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:06:47,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-01-06 17:06:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:47,461 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:06:47,462 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:06:47,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:06:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:06:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 17:06:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:06:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-01-06 17:06:47,470 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 12 [2021-01-06 17:06:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:47,471 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-01-06 17:06:47,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:06:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-01-06 17:06:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:06:47,472 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:47,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:47,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:06:47,688 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash -434311308, now seen corresponding path program 1 times [2021-01-06 17:06:47,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:47,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959126772] [2021-01-06 17:06:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:48,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959126772] [2021-01-06 17:06:48,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001082505] [2021-01-06 17:06:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:48,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:06:48,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:48,394 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:06:48,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:06:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:48,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:48,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 17:06:48,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317444303] [2021-01-06 17:06:48,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:06:48,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:48,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:06:48,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:06:48,433 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2021-01-06 17:06:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:48,716 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:06:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:06:48,717 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-06 17:06:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:48,719 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:06:48,719 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:06:48,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:06:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:06:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-01-06 17:06:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:06:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-01-06 17:06:48,725 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 18 [2021-01-06 17:06:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:48,726 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-01-06 17:06:48,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:06:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-01-06 17:06:48,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:06:48,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:48,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:48,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:48,942 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:48,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:48,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1397627287, now seen corresponding path program 2 times [2021-01-06 17:06:48,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:48,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159037884] [2021-01-06 17:06:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:49,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159037884] [2021-01-06 17:06:49,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104191697] [2021-01-06 17:06:49,156 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 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 17:06:49,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:06:49,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:49,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 17:06:49,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:49,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:49,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10] total 13 [2021-01-06 17:06:49,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125491417] [2021-01-06 17:06:49,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:06:49,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:49,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:06:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:06:49,725 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 13 states. [2021-01-06 17:06:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:49,953 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2021-01-06 17:06:49,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:06:49,954 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2021-01-06 17:06:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:49,955 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:06:49,956 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:06:49,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:06:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:06:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-01-06 17:06:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:06:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-01-06 17:06:49,964 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 22 [2021-01-06 17:06:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:49,965 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-01-06 17:06:49,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:06:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-01-06 17:06:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:06:49,966 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:49,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:50,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:50,181 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:50,182 INFO L82 PathProgramCache]: Analyzing trace with hash 214328890, now seen corresponding path program 1 times [2021-01-06 17:06:50,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:50,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604754287] [2021-01-06 17:06:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:50,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604754287] [2021-01-06 17:06:50,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047893084] [2021-01-06 17:06:50,574 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 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 17:06:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:50,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:06:50,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:50,870 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:06:50,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:06:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:50,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:50,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-06 17:06:50,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310711231] [2021-01-06 17:06:50,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:06:50,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:06:50,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:06:50,906 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 14 states. [2021-01-06 17:06:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:51,280 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-01-06 17:06:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:06:51,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2021-01-06 17:06:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:51,281 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:06:51,282 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:06:51,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:06:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:06:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2021-01-06 17:06:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:06:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-01-06 17:06:51,289 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2021-01-06 17:06:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:51,289 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-01-06 17:06:51,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:06:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-01-06 17:06:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:06:51,291 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:51,291 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:51,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:51,506 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:51,507 INFO L82 PathProgramCache]: Analyzing trace with hash -527005137, now seen corresponding path program 2 times [2021-01-06 17:06:51,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:51,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450793377] [2021-01-06 17:06:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:51,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450793377] [2021-01-06 17:06:51,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855903780] [2021-01-06 17:06:51,667 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 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 17:06:51,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:06:51,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:51,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 17:06:51,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:52,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:52,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 16 [2021-01-06 17:06:52,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736060852] [2021-01-06 17:06:52,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:06:52,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:52,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:06:52,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:06:52,134 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 16 states. [2021-01-06 17:06:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:52,417 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2021-01-06 17:06:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:06:52,418 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2021-01-06 17:06:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:52,419 INFO L225 Difference]: With dead ends: 59 [2021-01-06 17:06:52,419 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:06:52,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:06:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:06:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-01-06 17:06:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 17:06:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-01-06 17:06:52,426 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 32 [2021-01-06 17:06:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:52,426 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-01-06 17:06:52,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:06:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-01-06 17:06:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:06:52,427 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:52,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:52,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:06:52,641 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:52,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:52,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1069758305, now seen corresponding path program 1 times [2021-01-06 17:06:52,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:52,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294106933] [2021-01-06 17:06:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:53,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294106933] [2021-01-06 17:06:53,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942154925] [2021-01-06 17:06:53,041 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 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 17:06:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:06:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:53,440 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:06:53,443 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:06:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:53,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:53,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-06 17:06:53,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490043230] [2021-01-06 17:06:53,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:06:53,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:53,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:06:53,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:06:53,483 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 18 states. [2021-01-06 17:06:54,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:54,060 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-01-06 17:06:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:06:54,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2021-01-06 17:06:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:54,065 INFO L225 Difference]: With dead ends: 59 [2021-01-06 17:06:54,065 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 17:06:54,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:06:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 17:06:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-01-06 17:06:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 17:06:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-01-06 17:06:54,085 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2021-01-06 17:06:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:54,086 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-01-06 17:06:54,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:06:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-01-06 17:06:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:06:54,087 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:54,088 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:54,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:54,304 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1402679828, now seen corresponding path program 2 times [2021-01-06 17:06:54,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:54,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035262255] [2021-01-06 17:06:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:54,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035262255] [2021-01-06 17:06:54,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316508061] [2021-01-06 17:06:54,413 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 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 17:06:54,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:06:54,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:54,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:06:54,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:54,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:54,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 19 [2021-01-06 17:06:54,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247151641] [2021-01-06 17:06:54,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:06:54,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:54,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:06:54,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:06:54,973 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 19 states. [2021-01-06 17:06:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:55,587 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2021-01-06 17:06:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:06:55,588 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2021-01-06 17:06:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:55,589 INFO L225 Difference]: With dead ends: 67 [2021-01-06 17:06:55,589 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 17:06:55,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:06:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 17:06:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 17:06:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 17:06:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-01-06 17:06:55,595 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 41 [2021-01-06 17:06:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:55,596 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-01-06 17:06:55,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:06:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-01-06 17:06:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 17:06:55,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:55,597 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:55,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:55,811 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:55,812 INFO L82 PathProgramCache]: Analyzing trace with hash -545686070, now seen corresponding path program 1 times [2021-01-06 17:06:55,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:55,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882686910] [2021-01-06 17:06:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:56,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882686910] [2021-01-06 17:06:56,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766024334] [2021-01-06 17:06:56,224 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 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 17:06:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 17:06:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:56,676 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:06:56,678 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:06:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:56,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:56,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-06 17:06:56,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002764863] [2021-01-06 17:06:56,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:06:56,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:56,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:06:56,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:06:56,724 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 22 states. [2021-01-06 17:06:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:57,510 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2021-01-06 17:06:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:06:57,510 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2021-01-06 17:06:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:57,511 INFO L225 Difference]: With dead ends: 67 [2021-01-06 17:06:57,512 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 17:06:57,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:06:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 17:06:57,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2021-01-06 17:06:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 17:06:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-01-06 17:06:57,518 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 45 [2021-01-06 17:06:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:57,519 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-01-06 17:06:57,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:06:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-01-06 17:06:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 17:06:57,520 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:57,520 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:57,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:06:57,734 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1842567615, now seen corresponding path program 2 times [2021-01-06 17:06:57,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:57,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380795513] [2021-01-06 17:06:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:57,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380795513] [2021-01-06 17:06:57,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920658038] [2021-01-06 17:06:57,902 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 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 17:06:58,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:06:58,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 17:06:58,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:58,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:58,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16] total 22 [2021-01-06 17:06:58,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029884877] [2021-01-06 17:06:58,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:06:58,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:58,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:06:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:06:58,596 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 22 states. [2021-01-06 17:06:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:59,120 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2021-01-06 17:06:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:06:59,120 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2021-01-06 17:06:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:59,122 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:06:59,122 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:06:59,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-01-06 17:06:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:06:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-01-06 17:06:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 17:06:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-01-06 17:06:59,129 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 49 [2021-01-06 17:06:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:59,129 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-01-06 17:06:59,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:06:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-01-06 17:06:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 17:06:59,130 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:59,131 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:59,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:59,334 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:59,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:59,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1066921708, now seen corresponding path program 1 times [2021-01-06 17:06:59,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:59,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724729639] [2021-01-06 17:06:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:06:59,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724729639] [2021-01-06 17:06:59,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193590253] [2021-01-06 17:06:59,853 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 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 17:06:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:59,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 17:06:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:00,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:07:00,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:00,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:00,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-01-06 17:07:00,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152176491] [2021-01-06 17:07:00,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:07:00,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:07:00,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:07:00,454 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 26 states. [2021-01-06 17:07:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:01,492 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-01-06 17:07:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:07:01,493 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2021-01-06 17:07:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:01,494 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:07:01,494 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 17:07:01,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:07:01,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 17:07:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-01-06 17:07:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 17:07:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-01-06 17:07:01,501 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 52 [2021-01-06 17:07:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:01,501 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-01-06 17:07:01,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:07:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-01-06 17:07:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 17:07:01,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:01,502 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:01,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:01,716 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:01,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:01,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1129527305, now seen corresponding path program 2 times [2021-01-06 17:07:01,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:01,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100478738] [2021-01-06 17:07:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 12 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:01,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100478738] [2021-01-06 17:07:01,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721170041] [2021-01-06 17:07:01,889 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 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 17:07:01,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:01,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:01,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 17:07:01,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:02,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:02,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18] total 25 [2021-01-06 17:07:02,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232804098] [2021-01-06 17:07:02,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:07:02,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:02,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:07:02,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:07:02,683 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 25 states. [2021-01-06 17:07:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:03,616 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-01-06 17:07:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:07:03,617 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2021-01-06 17:07:03,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:03,618 INFO L225 Difference]: With dead ends: 80 [2021-01-06 17:07:03,619 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 17:07:03,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:07:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 17:07:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-01-06 17:07:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 17:07:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-01-06 17:07:03,626 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 56 [2021-01-06 17:07:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:03,626 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-01-06 17:07:03,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:07:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-01-06 17:07:03,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 17:07:03,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:03,628 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:03,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:07:03,838 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1119469916, now seen corresponding path program 1 times [2021-01-06 17:07:03,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:03,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401638615] [2021-01-06 17:07:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:04,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401638615] [2021-01-06 17:07:04,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383291543] [2021-01-06 17:07:04,399 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 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 17:07:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:04,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:07:04,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:05,047 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:07:05,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:05,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:05,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-01-06 17:07:05,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672829902] [2021-01-06 17:07:05,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 17:07:05,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:05,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 17:07:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:07:05,113 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 30 states. [2021-01-06 17:07:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:06,399 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2021-01-06 17:07:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:07:06,400 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2021-01-06 17:07:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:06,401 INFO L225 Difference]: With dead ends: 80 [2021-01-06 17:07:06,401 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 17:07:06,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:07:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 17:07:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2021-01-06 17:07:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 17:07:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2021-01-06 17:07:06,407 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 58 [2021-01-06 17:07:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:06,407 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2021-01-06 17:07:06,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 17:07:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2021-01-06 17:07:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 17:07:06,408 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:06,409 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:06,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:07:06,625 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:06,625 INFO L82 PathProgramCache]: Analyzing trace with hash 591404441, now seen corresponding path program 2 times [2021-01-06 17:07:06,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:06,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887436364] [2021-01-06 17:07:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 14 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:06,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887436364] [2021-01-06 17:07:06,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694543816] [2021-01-06 17:07:06,783 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 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 17:07:06,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:06,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:06,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 17:07:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:07,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:07,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20] total 28 [2021-01-06 17:07:07,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84039691] [2021-01-06 17:07:07,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:07:07,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:07,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:07:07,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:07:07,668 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 28 states. [2021-01-06 17:07:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:08,669 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2021-01-06 17:07:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:07:08,670 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2021-01-06 17:07:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:08,671 INFO L225 Difference]: With dead ends: 85 [2021-01-06 17:07:08,672 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 17:07:08,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 17:07:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 17:07:08,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-01-06 17:07:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 17:07:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-01-06 17:07:08,678 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 62 [2021-01-06 17:07:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:08,678 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-01-06 17:07:08,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:07:08,679 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-01-06 17:07:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 17:07:08,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:08,680 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:08,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:07:08,886 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1154648703, now seen corresponding path program 1 times [2021-01-06 17:07:08,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:08,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045075455] [2021-01-06 17:07:08,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:09,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045075455] [2021-01-06 17:07:09,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559538041] [2021-01-06 17:07:09,520 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 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 17:07:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:09,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 17:07:09,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:10,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:07:10,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:10,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:10,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2021-01-06 17:07:10,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147609146] [2021-01-06 17:07:10,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 17:07:10,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:10,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 17:07:10,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:07:10,362 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 34 states. [2021-01-06 17:07:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:11,952 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2021-01-06 17:07:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:07:11,952 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 63 [2021-01-06 17:07:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:11,953 INFO L225 Difference]: With dead ends: 85 [2021-01-06 17:07:11,953 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 17:07:11,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=304, Invalid=1952, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:07:11,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 17:07:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2021-01-06 17:07:11,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 17:07:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-01-06 17:07:11,959 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 63 [2021-01-06 17:07:11,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:11,960 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-01-06 17:07:11,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 17:07:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-01-06 17:07:11,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 17:07:11,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:11,961 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:12,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:12,168 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash 834470900, now seen corresponding path program 2 times [2021-01-06 17:07:12,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:12,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157683023] [2021-01-06 17:07:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:07:12,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157683023] [2021-01-06 17:07:12,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962689714] [2021-01-06 17:07:12,816 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 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 17:07:13,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:13,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:13,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 17:07:13,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:14,138 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:07:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:07:14,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:14,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-01-06 17:07:14,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612580968] [2021-01-06 17:07:14,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 17:07:14,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:14,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 17:07:14,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:07:14,216 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 38 states. [2021-01-06 17:07:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:16,166 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2021-01-06 17:07:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:07:16,166 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 67 [2021-01-06 17:07:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:16,167 INFO L225 Difference]: With dead ends: 87 [2021-01-06 17:07:16,167 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 17:07:16,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=372, Invalid=2598, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 17:07:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 17:07:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 17:07:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 17:07:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 17:07:16,170 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2021-01-06 17:07:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:16,170 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 17:07:16,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 17:07:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 17:07:16,171 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 17:07:16,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:07:16,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 17:07:16,590 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 28 [2021-01-06 17:07:16,592 INFO L189 CegarLoopUtils]: For program point L35-2(lines 23 38) no Hoare annotation was computed. [2021-01-06 17:07:16,593 INFO L189 CegarLoopUtils]: For program point L31(lines 31 38) no Hoare annotation was computed. [2021-01-06 17:07:16,593 INFO L189 CegarLoopUtils]: For program point L27(lines 27 38) no Hoare annotation was computed. [2021-01-06 17:07:16,593 INFO L189 CegarLoopUtils]: For program point L23(lines 23 38) no Hoare annotation was computed. [2021-01-06 17:07:16,593 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 17:07:16,593 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 17:07:16,593 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 17:07:16,593 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2021-01-06 17:07:16,594 INFO L189 CegarLoopUtils]: For program point L20(line 20) no Hoare annotation was computed. [2021-01-06 17:07:16,594 INFO L189 CegarLoopUtils]: For program point L33(lines 33 38) no Hoare annotation was computed. [2021-01-06 17:07:16,594 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 17:07:16,594 INFO L189 CegarLoopUtils]: For program point L29(lines 29 38) no Hoare annotation was computed. [2021-01-06 17:07:16,594 INFO L189 CegarLoopUtils]: For program point L25(lines 25 38) no Hoare annotation was computed. [2021-01-06 17:07:16,594 INFO L189 CegarLoopUtils]: For program point L21-2(lines 21 41) no Hoare annotation was computed. [2021-01-06 17:07:16,594 INFO L185 CegarLoopUtils]: At program point L42(lines 16 43) the Hoare annotation is: (or (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (and (= ULTIMATE.start_main_~v4~0 0) (= ULTIMATE.start_main_~i~0 0) (= ULTIMATE.start_main_~v1~0 0) (= ULTIMATE.start_main_~k~0 0) (= ULTIMATE.start_main_~v5~0 0) (= ULTIMATE.start_main_~j~0 0) (= ULTIMATE.start_main_~l~0 0) (= ULTIMATE.start_main_~v2~0 0) (= ULTIMATE.start_main_~v3~0 0))) [2021-01-06 17:07:16,594 INFO L189 CegarLoopUtils]: For program point L9(lines 9 11) no Hoare annotation was computed. [2021-01-06 17:07:16,595 INFO L185 CegarLoopUtils]: At program point L9-2(lines 8 41) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~v4~0 0) (= ULTIMATE.start_main_~i~0 0) (= ULTIMATE.start_main_~v1~0 0) (= ULTIMATE.start_main_~k~0 0) (= ULTIMATE.start_main_~v5~0 0) (= ULTIMATE.start_main_~j~0 0) (= ULTIMATE.start_main_~l~0 0) (= ULTIMATE.start_main_~v2~0 0) (= ULTIMATE.start_main_~v3~0 0)) (let ((.cse0 (+ ULTIMATE.start_main_~v1~0 ULTIMATE.start_main_~v2~0 ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~v3~0 ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~v4~0 ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~v5~0))) (and (<= ULTIMATE.start_main_~l~0 .cse0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= .cse0 ULTIMATE.start_main_~l~0)))) [2021-01-06 17:07:16,595 INFO L189 CegarLoopUtils]: For program point L10(line 10) no Hoare annotation was computed. [2021-01-06 17:07:16,595 INFO L189 CegarLoopUtils]: For program point L35(lines 35 38) no Hoare annotation was computed. [2021-01-06 17:07:16,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:07:16 BoogieIcfgContainer [2021-01-06 17:07:16,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:07:16,615 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:07:16,615 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:07:16,616 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:07:16,616 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:06:45" (3/4) ... [2021-01-06 17:07:16,620 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 17:07:16,632 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-01-06 17:07:16,632 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 17:07:16,632 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 17:07:16,633 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 17:07:16,679 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops-crafted-1/sumt8.c-witness.graphml [2021-01-06 17:07:16,679 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:07:16,681 INFO L168 Benchmark]: Toolchain (without parser) took 31934.39 ms. Allocated memory was 175.1 MB in the beginning and 383.8 MB in the end (delta: 208.7 MB). Free memory was 150.0 MB in the beginning and 155.3 MB in the end (delta: -5.4 MB). Peak memory consumption was 204.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:07:16,681 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 175.1 MB. Free memory is still 147.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:07:16,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.11 ms. Allocated memory is still 175.1 MB. Free memory was 149.8 MB in the beginning and 139.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:07:16,682 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.11 ms. Allocated memory is still 175.1 MB. Free memory was 139.8 MB in the beginning and 138.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:07:16,683 INFO L168 Benchmark]: Boogie Preprocessor took 25.20 ms. Allocated memory is still 175.1 MB. Free memory was 138.1 MB in the beginning and 137.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:07:16,683 INFO L168 Benchmark]: RCFGBuilder took 448.75 ms. Allocated memory is still 175.1 MB. Free memory was 136.9 MB in the beginning and 122.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:07:16,684 INFO L168 Benchmark]: TraceAbstraction took 31087.47 ms. Allocated memory was 175.1 MB in the beginning and 383.8 MB in the end (delta: 208.7 MB). Free memory was 122.2 MB in the beginning and 157.9 MB in the end (delta: -35.7 MB). Peak memory consumption was 173.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:07:16,684 INFO L168 Benchmark]: Witness Printer took 64.43 ms. Allocated memory is still 383.8 MB. Free memory was 157.9 MB in the beginning and 155.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:07:16,687 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 175.1 MB. Free memory is still 147.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.11 ms. Allocated memory is still 175.1 MB. Free memory was 149.8 MB in the beginning and 139.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.11 ms. Allocated memory is still 175.1 MB. Free memory was 139.8 MB in the beginning and 138.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.20 ms. Allocated memory is still 175.1 MB. Free memory was 138.1 MB in the beginning and 137.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 448.75 ms. Allocated memory is still 175.1 MB. Free memory was 136.9 MB in the beginning and 122.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31087.47 ms. Allocated memory was 175.1 MB in the beginning and 383.8 MB in the end (delta: 208.7 MB). Free memory was 122.2 MB in the beginning and 157.9 MB in the end (delta: -35.7 MB). Peak memory consumption was 173.6 MB. Max. memory is 8.0 GB. * Witness Printer took 64.43 ms. Allocated memory is still 383.8 MB. Free memory was 157.9 MB in the beginning and 155.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: !(0 == cond) || ((((((((v4 == 0 && i == 0) && v1 == 0) && k == 0) && v5 == 0) && j == 0) && l == 0) && v2 == 0) && v3 == 0) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: ((((((((v4 == 0 && i == 0) && v1 == 0) && k == 0) && v5 == 0) && j == 0) && l == 0) && v2 == 0) && v3 == 0) || ((l <= v1 + v2 + i + v3 + k + v4 + j + v5 && 1 == cond) && v1 + v2 + i + v3 + k + v4 + j + v5 <= l) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.6s, OverallIterations: 16, TraceHistogramMax: 9, AutomataDifference: 11.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 151 SDtfs, 1027 SDslu, 1016 SDs, 0 SdLazy, 9779 SolverSat, 268 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 923 GetRequests, 495 SyntacticMatches, 8 SemanticMatches, 420 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4134 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=15, 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, 16 MinimizatonAttempts, 70 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 14 NumberOfFragments, 88 HoareAnnotationTreeSize, 2 FomulaSimplifications, 4281 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 350 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 1292 NumberOfCodeBlocks, 1292 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1261 ConstructedInterpolants, 0 QuantifiedInterpolants, 1412315 SizeOfPredicates, 165 NumberOfNonLiveVariables, 2070 ConjunctsInSsa, 689 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 57/2416 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 correct! Received shutdown request...