/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:57:51,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:57:51,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:57:51,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:57:51,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:57:51,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:57:51,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:57:51,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:57:51,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:57:51,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:57:51,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:57:51,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:57:51,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:57:51,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:57:51,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:57:51,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:57:51,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:57:51,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:57:51,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:57:51,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:57:51,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:57:51,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:57:51,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:57:51,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:57:51,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 05:57:51,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:57:51,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:57:51,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:57:51,839 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 [2020-08-19 05:57:51,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:57:51,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:57:51,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:57:51,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:57:51,863 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:57:51,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:57:51,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:57:51,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:57:51,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:57:51,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:57:51,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:57:51,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:57:51,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:57:51,865 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:57:51,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:57:51,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:57:51,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:57:51,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:57:51,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:57:51,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:57:51,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:57:51,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:57:51,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:57:51,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:57:51,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:57:51,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:57:51,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:57:51,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:57:51,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:57:51,869 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=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 05:57:52,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:57:52,207 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:57:52,210 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:57:52,212 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:57:52,212 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:57:52,213 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-08-19 05:57:52,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48b547475/def9ee5717b44dc89e25591569f5c051/FLAG74d276245 [2020-08-19 05:57:52,730 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:57:52,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-08-19 05:57:52,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48b547475/def9ee5717b44dc89e25591569f5c051/FLAG74d276245 [2020-08-19 05:57:52,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48b547475/def9ee5717b44dc89e25591569f5c051 [2020-08-19 05:57:52,766 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:57:52,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:57:52,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:57:52,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:57:52,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:57:52,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:57:52" (1/1) ... [2020-08-19 05:57:52,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780fc4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52, skipping insertion in model container [2020-08-19 05:57:52,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:57:52" (1/1) ... [2020-08-19 05:57:52,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:57:52,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:57:52,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:57:52,973 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:57:52,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:57:52,998 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:57:52,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52 WrapperNode [2020-08-19 05:57:52,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:57:53,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:57:53,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:57:53,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:57:53,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52" (1/1) ... [2020-08-19 05:57:53,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52" (1/1) ... [2020-08-19 05:57:53,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52" (1/1) ... [2020-08-19 05:57:53,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52" (1/1) ... [2020-08-19 05:57:53,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52" (1/1) ... [2020-08-19 05:57:53,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52" (1/1) ... [2020-08-19 05:57:53,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52" (1/1) ... [2020-08-19 05:57:53,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:57:53,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:57:53,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:57:53,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:57:53,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52" (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 [2020-08-19 05:57:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:57:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:57:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-08-19 05:57:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:57:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:57:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:57:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-08-19 05:57:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:57:53,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:57:53,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:57:53,352 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:57:53,352 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 05:57:53,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:57:53 BoogieIcfgContainer [2020-08-19 05:57:53,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:57:53,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:57:53,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:57:53,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:57:53,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:57:52" (1/3) ... [2020-08-19 05:57:53,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5884da67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:57:53, skipping insertion in model container [2020-08-19 05:57:53,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:57:52" (2/3) ... [2020-08-19 05:57:53,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5884da67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:57:53, skipping insertion in model container [2020-08-19 05:57:53,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:57:53" (3/3) ... [2020-08-19 05:57:53,365 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-08-19 05:57:53,375 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:57:53,382 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:57:53,397 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:57:53,422 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:57:53,422 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:57:53,423 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:57:53,423 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:57:53,423 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:57:53,423 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:57:53,424 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:57:53,424 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:57:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-19 05:57:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 05:57:53,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:57:53,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:57:53,454 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:57:53,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:57:53,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-08-19 05:57:53,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:57:53,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017047614] [2020-08-19 05:57:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:57:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:53,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:57:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:53,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:57:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:57:53,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017047614] [2020-08-19 05:57:53,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:57:53,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 05:57:53,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934658933] [2020-08-19 05:57:53,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:57:53,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:57:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:57:53,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:57:53,759 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-08-19 05:57:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:57:53,919 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-08-19 05:57:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:57:53,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-19 05:57:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:57:53,932 INFO L225 Difference]: With dead ends: 36 [2020-08-19 05:57:53,932 INFO L226 Difference]: Without dead ends: 22 [2020-08-19 05:57:53,936 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 [2020-08-19 05:57:53,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-19 05:57:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-19 05:57:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-19 05:57:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-19 05:57:53,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-08-19 05:57:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:57:53,988 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-19 05:57:53,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:57:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-19 05:57:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:57:53,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:57:53,992 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] [2020-08-19 05:57:53,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:57:53,993 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:57:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:57:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-08-19 05:57:53,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:57:53,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420421032] [2020-08-19 05:57:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:57:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:57:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:57:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 05:57:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-19 05:57:54,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420421032] [2020-08-19 05:57:54,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:57:54,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 05:57:54,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973601539] [2020-08-19 05:57:54,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:57:54,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:57:54,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:57:54,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:57:54,257 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-08-19 05:57:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:57:54,394 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-08-19 05:57:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:57:54,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-19 05:57:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:57:54,397 INFO L225 Difference]: With dead ends: 39 [2020-08-19 05:57:54,398 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 05:57:54,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:57:54,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 05:57:54,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 05:57:54,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 05:57:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-19 05:57:54,417 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2020-08-19 05:57:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:57:54,419 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-19 05:57:54,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:57:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-19 05:57:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 05:57:54,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:57:54,426 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] [2020-08-19 05:57:54,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:57:54,427 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:57:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:57:54,428 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-08-19 05:57:54,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:57:54,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366233138] [2020-08-19 05:57:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:57:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:57:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:57:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 05:57:54,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366233138] [2020-08-19 05:57:54,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:57:54,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 05:57:54,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792324479] [2020-08-19 05:57:54,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 05:57:54,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:57:54,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 05:57:54,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:57:54,645 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2020-08-19 05:57:54,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:57:54,849 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-08-19 05:57:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 05:57:54,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-19 05:57:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:57:54,853 INFO L225 Difference]: With dead ends: 34 [2020-08-19 05:57:54,853 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 05:57:54,854 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 [2020-08-19 05:57:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 05:57:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-19 05:57:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-19 05:57:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-08-19 05:57:54,863 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2020-08-19 05:57:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:57:54,863 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-08-19 05:57:54,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 05:57:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-08-19 05:57:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 05:57:54,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:57:54,866 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] [2020-08-19 05:57:54,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:57:54,866 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:57:54,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:57:54,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1293014720, now seen corresponding path program 2 times [2020-08-19 05:57:54,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:57:54,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710911492] [2020-08-19 05:57:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:57:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:57:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:57:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:54,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-19 05:57:55,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710911492] [2020-08-19 05:57:55,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:57:55,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 05:57:55,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278951229] [2020-08-19 05:57:55,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:57:55,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:57:55,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:57:55,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:57:55,062 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 6 states. [2020-08-19 05:57:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:57:55,187 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-08-19 05:57:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:57:55,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-08-19 05:57:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:57:55,190 INFO L225 Difference]: With dead ends: 54 [2020-08-19 05:57:55,190 INFO L226 Difference]: Without dead ends: 31 [2020-08-19 05:57:55,191 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 [2020-08-19 05:57:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-19 05:57:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-19 05:57:55,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-19 05:57:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-08-19 05:57:55,200 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 42 [2020-08-19 05:57:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:57:55,200 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-08-19 05:57:55,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:57:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-08-19 05:57:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 05:57:55,202 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:57:55,203 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] [2020-08-19 05:57:55,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:57:55,203 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:57:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:57:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 3 times [2020-08-19 05:57:55,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:57:55,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289319723] [2020-08-19 05:57:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:57:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:57:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:57:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 05:57:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-19 05:57:55,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289319723] [2020-08-19 05:57:55,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:57:55,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 05:57:55,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732321711] [2020-08-19 05:57:55,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 05:57:55,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:57:55,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 05:57:55,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:57:55,346 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-08-19 05:57:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:57:55,448 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-08-19 05:57:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 05:57:55,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-19 05:57:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:57:55,450 INFO L225 Difference]: With dead ends: 55 [2020-08-19 05:57:55,451 INFO L226 Difference]: Without dead ends: 31 [2020-08-19 05:57:55,452 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 [2020-08-19 05:57:55,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-19 05:57:55,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-19 05:57:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-19 05:57:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-08-19 05:57:55,459 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 41 [2020-08-19 05:57:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:57:55,460 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-08-19 05:57:55,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 05:57:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-08-19 05:57:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 05:57:55,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:57:55,462 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] [2020-08-19 05:57:55,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:57:55,462 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:57:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:57:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 4 times [2020-08-19 05:57:55,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:57:55,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292781094] [2020-08-19 05:57:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:57:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:57:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:57:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 05:57:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-19 05:57:55,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292781094] [2020-08-19 05:57:55,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:57:55,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 05:57:55,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454347855] [2020-08-19 05:57:55,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 05:57:55,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:57:55,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 05:57:55,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-19 05:57:55,677 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2020-08-19 05:57:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:57:55,929 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-08-19 05:57:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 05:57:55,929 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-08-19 05:57:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:57:55,931 INFO L225 Difference]: With dead ends: 41 [2020-08-19 05:57:55,931 INFO L226 Difference]: Without dead ends: 37 [2020-08-19 05:57:55,932 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 [2020-08-19 05:57:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-19 05:57:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-08-19 05:57:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 05:57:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-08-19 05:57:55,940 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 42 [2020-08-19 05:57:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:57:55,941 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-08-19 05:57:55,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 05:57:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-08-19 05:57:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 05:57:55,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:57:55,943 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] [2020-08-19 05:57:55,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:57:55,943 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:57:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:57:55,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 5 times [2020-08-19 05:57:55,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:57:55,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496400047] [2020-08-19 05:57:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:57:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:57:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:57:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:55,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 05:57:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-08-19 05:57:56,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496400047] [2020-08-19 05:57:56,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:57:56,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 05:57:56,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771597065] [2020-08-19 05:57:56,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 05:57:56,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:57:56,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 05:57:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:57:56,071 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 8 states. [2020-08-19 05:57:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:57:56,234 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2020-08-19 05:57:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 05:57:56,235 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-08-19 05:57:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:57:56,237 INFO L225 Difference]: With dead ends: 70 [2020-08-19 05:57:56,237 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 05:57:56,238 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 [2020-08-19 05:57:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 05:57:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-08-19 05:57:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-19 05:57:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-08-19 05:57:56,246 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 55 [2020-08-19 05:57:56,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:57:56,247 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-08-19 05:57:56,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 05:57:56,247 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-08-19 05:57:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 05:57:56,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:57:56,249 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] [2020-08-19 05:57:56,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:57:56,249 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:57:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:57:56,250 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 6 times [2020-08-19 05:57:56,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:57:56,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347909595] [2020-08-19 05:57:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:57:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:57:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:57:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 05:57:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 05:57:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 05:57:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 05:57:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 151 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-08-19 05:57:56,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347909595] [2020-08-19 05:57:56,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:57:56,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 05:57:56,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98593659] [2020-08-19 05:57:56,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 05:57:56,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:57:56,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 05:57:56,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:57:56,482 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 10 states. [2020-08-19 05:57:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:57:56,821 INFO L93 Difference]: Finished difference Result 92 states and 135 transitions. [2020-08-19 05:57:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 05:57:56,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-08-19 05:57:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:57:56,829 INFO L225 Difference]: With dead ends: 92 [2020-08-19 05:57:56,829 INFO L226 Difference]: Without dead ends: 58 [2020-08-19 05:57:56,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-08-19 05:57:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-19 05:57:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-08-19 05:57:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 05:57:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-08-19 05:57:56,856 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 97 [2020-08-19 05:57:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:57:56,859 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-08-19 05:57:56,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 05:57:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-08-19 05:57:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-19 05:57:56,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:57:56,861 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] [2020-08-19 05:57:56,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:57:56,862 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:57:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:57:56,863 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 7 times [2020-08-19 05:57:56,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:57:56,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88042316] [2020-08-19 05:57:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:57:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:57:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:57:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:56,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:57,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:57,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:57,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 05:57:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:57,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 05:57:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:57,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:57:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:57,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:57:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:57:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 8 proven. 98 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-19 05:57:57,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88042316] [2020-08-19 05:57:57,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:57:57,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 05:57:57,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205910125] [2020-08-19 05:57:57,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 05:57:57,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:57:57,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 05:57:57,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-19 05:57:57,124 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 14 states. [2020-08-19 05:57:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:57:57,310 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-08-19 05:57:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 05:57:57,310 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-08-19 05:57:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:57:57,311 INFO L225 Difference]: With dead ends: 52 [2020-08-19 05:57:57,311 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 05:57:57,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-08-19 05:57:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 05:57:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 05:57:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 05:57:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 05:57:57,313 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-08-19 05:57:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:57:57,313 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 05:57:57,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 05:57:57,314 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 05:57:57,314 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 05:57:57,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:57:57,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 05:57:57,527 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-08-19 05:57:57,527 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-08-19 05:57:57,528 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 2 |fibonacci_#in~n|)) [2020-08-19 05:57:57,528 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-08-19 05:57:57,528 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|)))) [2020-08-19 05:57:57,528 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-08-19 05:57:57,528 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-08-19 05:57:57,529 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-08-19 05:57:57,529 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-08-19 05:57:57,529 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 05:57:57,529 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:57:57,529 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:57:57,529 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 05:57:57,529 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 05:57:57,529 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 05:57:57,530 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-08-19 05:57:57,530 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-08-19 05:57:57,530 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-08-19 05:57:57,530 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-08-19 05:57:57,530 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-19 05:57:57,530 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-08-19 05:57:57,530 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-08-19 05:57:57,531 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-08-19 05:57:57,531 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-08-19 05:57:57,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:57:57 BoogieIcfgContainer [2020-08-19 05:57:57,537 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:57:57,540 INFO L168 Benchmark]: Toolchain (without parser) took 4771.80 ms. Allocated memory was 138.4 MB in the beginning and 278.9 MB in the end (delta: 140.5 MB). Free memory was 101.3 MB in the beginning and 228.4 MB in the end (delta: -127.1 MB). Peak memory consumption was 114.8 MB. Max. memory is 7.1 GB. [2020-08-19 05:57:57,541 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 05:57:57,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.24 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 91.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-19 05:57:57,543 INFO L168 Benchmark]: Boogie Preprocessor took 105.78 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 181.0 MB in the end (delta: -89.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-19 05:57:57,544 INFO L168 Benchmark]: RCFGBuilder took 250.84 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 168.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-19 05:57:57,544 INFO L168 Benchmark]: TraceAbstraction took 4179.51 ms. Allocated memory was 202.4 MB in the beginning and 278.9 MB in the end (delta: 76.5 MB). Free memory was 168.3 MB in the beginning and 228.4 MB in the end (delta: -60.1 MB). Peak memory consumption was 117.9 MB. Max. memory is 7.1 GB. [2020-08-19 05:57:57,548 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 229.24 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 91.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.78 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 181.0 MB in the end (delta: -89.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 250.84 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 168.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4179.51 ms. Allocated memory was 202.4 MB in the beginning and 278.9 MB in the end (delta: 76.5 MB). Free memory was 168.3 MB in the beginning and 228.4 MB in the end (delta: -60.1 MB). Peak memory consumption was 117.9 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: 3.8s, 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, 730 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, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 215 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s 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...