/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:25:50,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:25:50,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:25:50,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:25:50,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:25:50,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:25:50,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:25:50,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:25:50,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:25:50,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:25:50,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:25:50,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:25:50,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:25:50,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:25:50,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:25:50,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:25:50,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:25:50,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:25:50,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:25:50,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:25:50,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:25:50,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:25:50,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:25:50,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:25:50,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 05:25:50,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 05:25:50,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 05:25:50,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 05:25:50,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 05:25:50,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 05:25:50,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 05:25:50,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 05:25:50,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 05:25:50,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 05:25:50,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 05:25:50,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 05:25:50,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 05:25:50,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 05:25:50,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:25:50,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:25:50,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:25:50,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 05:25:50,754 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:25:50,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:25:50,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:25:50,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:25:50,757 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:25:50,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:25:50,758 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:25:50,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:25:50,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:25:50,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:25:50,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:25:50,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:25:50,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:25:50,760 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:25:50,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:25:50,760 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:25:50,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:25:50,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:25:50,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:25:50,761 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:25:50,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:25:50,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:25:50,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:25:50,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:25:50,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:25:50,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:25:50,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:25:50,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:25:50,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:25:50,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:25:51,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:25:51,128 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:25:51,132 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:25:51,135 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:25:51,135 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:25:51,136 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-08-22 05:25:51,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1ea0c3fb/7d8aaa53a98544beb5b63b469b30a31b/FLAG5101249fe [2020-08-22 05:25:51,625 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:25:51,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-08-22 05:25:51,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1ea0c3fb/7d8aaa53a98544beb5b63b469b30a31b/FLAG5101249fe [2020-08-22 05:25:52,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1ea0c3fb/7d8aaa53a98544beb5b63b469b30a31b [2020-08-22 05:25:52,028 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:25:52,030 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:25:52,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:25:52,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:25:52,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:25:52,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:25:52" (1/1) ... [2020-08-22 05:25:52,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bab5c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52, skipping insertion in model container [2020-08-22 05:25:52,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:25:52" (1/1) ... [2020-08-22 05:25:52,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:25:52,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:25:52,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:25:52,240 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:25:52,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:25:52,271 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:25:52,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52 WrapperNode [2020-08-22 05:25:52,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:25:52,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:25:52,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:25:52,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:25:52,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52" (1/1) ... [2020-08-22 05:25:52,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52" (1/1) ... [2020-08-22 05:25:52,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52" (1/1) ... [2020-08-22 05:25:52,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52" (1/1) ... [2020-08-22 05:25:52,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52" (1/1) ... [2020-08-22 05:25:52,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52" (1/1) ... [2020-08-22 05:25:52,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52" (1/1) ... [2020-08-22 05:25:52,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:25:52,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:25:52,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:25:52,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:25:52,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:25:52,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:25:52,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:25:52,438 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-08-22 05:25:52,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:25:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:25:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 05:25:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-08-22 05:25:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:25:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:25:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:25:52,622 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:25:52,623 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 05:25:52,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:25:52 BoogieIcfgContainer [2020-08-22 05:25:52,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:25:52,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:25:52,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:25:52,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:25:52,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:25:52" (1/3) ... [2020-08-22 05:25:52,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcbbd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:25:52, skipping insertion in model container [2020-08-22 05:25:52,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:52" (2/3) ... [2020-08-22 05:25:52,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcbbd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:25:52, skipping insertion in model container [2020-08-22 05:25:52,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:25:52" (3/3) ... [2020-08-22 05:25:52,636 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-08-22 05:25:52,647 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:25:52,655 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:25:52,678 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:25:52,732 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:25:52,733 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:25:52,733 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:25:52,733 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:25:52,733 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:25:52,733 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:25:52,734 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:25:52,734 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:25:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-22 05:25:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 05:25:52,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:52,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:25:52,790 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:52,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-08-22 05:25:52,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:52,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140437049] [2020-08-22 05:25:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:25:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:25:53,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140437049] [2020-08-22 05:25:53,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:25:53,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 05:25:53,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848371056] [2020-08-22 05:25:53,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:25:53,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:53,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:25:53,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:25:53,076 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-08-22 05:25:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:53,251 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-08-22 05:25:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:25:53,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-22 05:25:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:53,265 INFO L225 Difference]: With dead ends: 36 [2020-08-22 05:25:53,266 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 05:25:53,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:25:53,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 05:25:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 05:25:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 05:25:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-22 05:25:53,321 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-08-22 05:25:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:53,322 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-22 05:25:53,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:25:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-22 05:25:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 05:25:53,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:53,325 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:25:53,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:25:53,326 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:53,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:53,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-08-22 05:25:53,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:53,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575517761] [2020-08-22 05:25:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:25:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:25:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 05:25:53,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575517761] [2020-08-22 05:25:53,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:53,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 05:25:53,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289808169] [2020-08-22 05:25:53,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:25:53,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:53,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:25:53,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:25:53,492 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-08-22 05:25:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:53,585 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-08-22 05:25:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:25:53,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-22 05:25:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:53,587 INFO L225 Difference]: With dead ends: 39 [2020-08-22 05:25:53,587 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 05:25:53,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:25:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 05:25:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 05:25:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 05:25:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-22 05:25:53,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2020-08-22 05:25:53,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:53,598 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-22 05:25:53,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:25:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-22 05:25:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 05:25:53,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:53,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:25:53,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:25:53,601 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:53,602 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-08-22 05:25:53,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:53,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353473591] [2020-08-22 05:25:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:25:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 05:25:53,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353473591] [2020-08-22 05:25:53,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:53,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:25:53,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672057313] [2020-08-22 05:25:53,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:25:53,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:53,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:25:53,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:25:53,864 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2020-08-22 05:25:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:54,084 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-08-22 05:25:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:25:54,085 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 05:25:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:54,087 INFO L225 Difference]: With dead ends: 34 [2020-08-22 05:25:54,087 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 05:25:54,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:25:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 05:25:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-22 05:25:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 05:25:54,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-08-22 05:25:54,097 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2020-08-22 05:25:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:54,098 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-08-22 05:25:54,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:25:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-08-22 05:25:54,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 05:25:54,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:54,100 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:25:54,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:25:54,101 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1293014720, now seen corresponding path program 2 times [2020-08-22 05:25:54,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:54,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912613396] [2020-08-22 05:25:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:25:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-22 05:25:54,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912613396] [2020-08-22 05:25:54,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:54,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 05:25:54,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336483893] [2020-08-22 05:25:54,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:25:54,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:54,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:25:54,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:25:54,279 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 6 states. [2020-08-22 05:25:54,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:54,442 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-08-22 05:25:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 05:25:54,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-08-22 05:25:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:54,447 INFO L225 Difference]: With dead ends: 54 [2020-08-22 05:25:54,447 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 05:25:54,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:25:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 05:25:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-22 05:25:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 05:25:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-08-22 05:25:54,468 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 42 [2020-08-22 05:25:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:54,469 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-08-22 05:25:54,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:25:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-08-22 05:25:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 05:25:54,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:54,473 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:25:54,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:25:54,473 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 3 times [2020-08-22 05:25:54,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:54,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15643404] [2020-08-22 05:25:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:25:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 05:25:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-22 05:25:54,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15643404] [2020-08-22 05:25:54,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:54,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 05:25:54,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631415730] [2020-08-22 05:25:54,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 05:25:54,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:54,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 05:25:54,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:25:54,690 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-08-22 05:25:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:54,795 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-08-22 05:25:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 05:25:54,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-22 05:25:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:54,797 INFO L225 Difference]: With dead ends: 55 [2020-08-22 05:25:54,798 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 05:25:54,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:25:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 05:25:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-22 05:25:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 05:25:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-08-22 05:25:54,807 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 41 [2020-08-22 05:25:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:54,808 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-08-22 05:25:54,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 05:25:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-08-22 05:25:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 05:25:54,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:54,810 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:25:54,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:25:54,810 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:54,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:54,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 4 times [2020-08-22 05:25:54,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:54,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377501200] [2020-08-22 05:25:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:25:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 05:25:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 05:25:55,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377501200] [2020-08-22 05:25:55,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:55,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 05:25:55,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658896060] [2020-08-22 05:25:55,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:25:55,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:55,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:25:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:25:55,015 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2020-08-22 05:25:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:55,284 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-08-22 05:25:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 05:25:55,285 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-08-22 05:25:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:55,287 INFO L225 Difference]: With dead ends: 41 [2020-08-22 05:25:55,287 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 05:25:55,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-08-22 05:25:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 05:25:55,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-08-22 05:25:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 05:25:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-08-22 05:25:55,297 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 42 [2020-08-22 05:25:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:55,297 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-08-22 05:25:55,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:25:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-08-22 05:25:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 05:25:55,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:55,299 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:25:55,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:25:55,300 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 5 times [2020-08-22 05:25:55,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:55,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961110820] [2020-08-22 05:25:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:25:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 05:25:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-08-22 05:25:55,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961110820] [2020-08-22 05:25:55,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:55,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 05:25:55,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843807998] [2020-08-22 05:25:55,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:25:55,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:55,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:25:55,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:25:55,446 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 8 states. [2020-08-22 05:25:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:55,629 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2020-08-22 05:25:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:25:55,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-08-22 05:25:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:55,631 INFO L225 Difference]: With dead ends: 70 [2020-08-22 05:25:55,631 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 05:25:55,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:25:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 05:25:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-08-22 05:25:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 05:25:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-08-22 05:25:55,645 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 55 [2020-08-22 05:25:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:55,645 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-08-22 05:25:55,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:25:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-08-22 05:25:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 05:25:55,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:55,647 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:25:55,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:25:55,648 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:55,648 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 6 times [2020-08-22 05:25:55,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:55,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745126503] [2020-08-22 05:25:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:25:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 05:25:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 05:25:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 05:25:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 05:25:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 151 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-08-22 05:25:55,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745126503] [2020-08-22 05:25:55,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:55,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:25:55,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534494337] [2020-08-22 05:25:55,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:25:55,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:55,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:25:55,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:25:55,888 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 10 states. [2020-08-22 05:25:56,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:56,172 INFO L93 Difference]: Finished difference Result 92 states and 135 transitions. [2020-08-22 05:25:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 05:25:56,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-08-22 05:25:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:56,176 INFO L225 Difference]: With dead ends: 92 [2020-08-22 05:25:56,176 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 05:25:56,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-08-22 05:25:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 05:25:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-08-22 05:25:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 05:25:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-08-22 05:25:56,190 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 97 [2020-08-22 05:25:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:56,191 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-08-22 05:25:56,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:25:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-08-22 05:25:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 05:25:56,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:56,193 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:25:56,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:25:56,193 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 7 times [2020-08-22 05:25:56,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:56,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683740482] [2020-08-22 05:25:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:25:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 05:25:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 05:25:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 05:25:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 05:25:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 8 proven. 98 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-22 05:25:56,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683740482] [2020-08-22 05:25:56,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:56,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 05:25:56,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106283231] [2020-08-22 05:25:56,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 05:25:56,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:56,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 05:25:56,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:25:56,498 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 14 states. [2020-08-22 05:25:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:56,723 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-08-22 05:25:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 05:25:56,724 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-08-22 05:25:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:56,725 INFO L225 Difference]: With dead ends: 52 [2020-08-22 05:25:56,725 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 05:25:56,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-08-22 05:25:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 05:25:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 05:25:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 05:25:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 05:25:56,728 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-08-22 05:25:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:56,728 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 05:25:56,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 05:25:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 05:25:56,729 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 05:25:56,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:25:56,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 05:25:56,989 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-08-22 05:25:56,989 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-08-22 05:25:56,989 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 2 |fibonacci_#in~n|)) [2020-08-22 05:25:56,989 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-08-22 05:25:56,990 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| 2) (<= 1 |fibonacci_#t~ret0|) .cse0 (<= 2 |fibonacci_#in~n|)) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 |fibonacci_#in~n|)))) [2020-08-22 05:25:56,990 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-08-22 05:25:56,990 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-08-22 05:25:56,990 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-08-22 05:25:56,990 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-08-22 05:25:56,990 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 05:25:56,990 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 05:25:56,990 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 05:25:56,991 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 05:25:56,991 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 05:25:56,991 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 05:25:56,991 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-08-22 05:25:56,991 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-08-22 05:25:56,991 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-08-22 05:25:56,991 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-08-22 05:25:56,992 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-22 05:25:56,992 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-08-22 05:25:56,992 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-08-22 05:25:56,993 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-08-22 05:25:56,993 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-08-22 05:25:57,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:25:57 BoogieIcfgContainer [2020-08-22 05:25:57,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 05:25:57,004 INFO L168 Benchmark]: Toolchain (without parser) took 4973.52 ms. Allocated memory was 139.5 MB in the beginning and 280.5 MB in the end (delta: 141.0 MB). Free memory was 102.2 MB in the beginning and 226.9 MB in the end (delta: -124.7 MB). Peak memory consumption was 114.1 MB. Max. memory is 7.1 GB. [2020-08-22 05:25:57,005 INFO L168 Benchmark]: CDTParser took 0.69 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 05:25:57,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.16 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 05:25:57,007 INFO L168 Benchmark]: Boogie Preprocessor took 102.44 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 181.5 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 05:25:57,011 INFO L168 Benchmark]: RCFGBuilder took 252.45 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 168.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 05:25:57,012 INFO L168 Benchmark]: TraceAbstraction took 4372.25 ms. Allocated memory was 202.4 MB in the beginning and 280.5 MB in the end (delta: 78.1 MB). Free memory was 168.6 MB in the beginning and 226.9 MB in the end (delta: -58.2 MB). Peak memory consumption was 117.6 MB. Max. memory is 7.1 GB. [2020-08-22 05:25:57,023 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.16 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.44 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 181.5 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 252.45 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 168.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4372.25 ms. Allocated memory was 202.4 MB in the beginning and 280.5 MB in the end (delta: 78.1 MB). Free memory was 168.6 MB in the beginning and 226.9 MB in the end (delta: -58.2 MB). Peak memory consumption was 117.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 9, TraceHistogramMax: 13, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 158 SDtfs, 139 SDslu, 543 SDs, 0 SdLazy, 728 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=8, 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, 9 MinimizatonAttempts, 14 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 80 PreInvPairs, 99 NumberOfFragments, 39 HoareAnnotationTreeSize, 80 FomulaSimplifications, 291 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 215 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 415 NumberOfCodeBlocks, 415 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 406 ConstructedInterpolants, 0 QuantifiedInterpolants, 50421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 550/894 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...