/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=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:47:26,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:47:26,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:47:26,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:47:26,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:47:26,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:47:26,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:47:26,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:47:26,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:47:26,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:47:26,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:47:26,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:47:26,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:47:26,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:47:26,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:47:26,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:47:26,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:47:26,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:47:26,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:47:26,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:47:26,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:47:26,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:47:26,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:47:26,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:47:26,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:47:26,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:47:26,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:47:26,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:47:26,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:47:26,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 06:47:26,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 06:47:26,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 06:47:26,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 06:47:26,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 06:47:26,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 06:47:26,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 06:47:26,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 06:47:26,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 06:47:26,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:47:26,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:47:26,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:47:26,227 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 06:47:26,250 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:47:26,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:47:26,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:47:26,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:47:26,252 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:47:26,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:47:26,252 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:47:26,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:47:26,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:47:26,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:47:26,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:47:26,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:47:26,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:47:26,254 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:47:26,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:47:26,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:47:26,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:47:26,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:47:26,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:47:26,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:47:26,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:47:26,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:47:26,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:47:26,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:47:26,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:47:26,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:47:26,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:47:26,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:47:26,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:47:26,257 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=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:47:26,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:47:26,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:47:26,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:47:26,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:47:26,591 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:47:26,593 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-08-19 06:47:26,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be7ca487e/2194026b359b43c9bae7808f4e8817fb/FLAG7a787e7d2 [2020-08-19 06:47:27,128 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:47:27,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-08-19 06:47:27,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be7ca487e/2194026b359b43c9bae7808f4e8817fb/FLAG7a787e7d2 [2020-08-19 06:47:27,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be7ca487e/2194026b359b43c9bae7808f4e8817fb [2020-08-19 06:47:27,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:47:27,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:47:27,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:47:27,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:47:27,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:47:27,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:47:27" (1/1) ... [2020-08-19 06:47:27,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156a129e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27, skipping insertion in model container [2020-08-19 06:47:27,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:47:27" (1/1) ... [2020-08-19 06:47:27,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:47:27,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:47:27,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:47:27,864 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:47:27,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:47:27,891 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:47:27,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27 WrapperNode [2020-08-19 06:47:27,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:47:27,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:47:27,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:47:27,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:47:27,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27" (1/1) ... [2020-08-19 06:47:27,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27" (1/1) ... [2020-08-19 06:47:28,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27" (1/1) ... [2020-08-19 06:47:28,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27" (1/1) ... [2020-08-19 06:47:28,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27" (1/1) ... [2020-08-19 06:47:28,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27" (1/1) ... [2020-08-19 06:47:28,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27" (1/1) ... [2020-08-19 06:47:28,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:47:28,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:47:28,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:47:28,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:47:28,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27" (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 06:47:28,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:47:28,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:47:28,093 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-19 06:47:28,093 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-19 06:47:28,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:47:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:47:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:47:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-19 06:47:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-19 06:47:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:47:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:47:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:47:28,306 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:47:28,306 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 06:47:28,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:47:28 BoogieIcfgContainer [2020-08-19 06:47:28,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:47:28,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:47:28,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:47:28,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:47:28,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:47:27" (1/3) ... [2020-08-19 06:47:28,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be50c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:47:28, skipping insertion in model container [2020-08-19 06:47:28,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:27" (2/3) ... [2020-08-19 06:47:28,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be50c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:47:28, skipping insertion in model container [2020-08-19 06:47:28,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:47:28" (3/3) ... [2020-08-19 06:47:28,321 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-08-19 06:47:28,333 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:47:28,341 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:47:28,357 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:47:28,409 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:47:28,409 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:47:28,410 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:47:28,410 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:47:28,410 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:47:28,410 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:47:28,410 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:47:28,411 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:47:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 06:47:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 06:47:28,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:28,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:28,449 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:28,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:28,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-19 06:47:28,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:28,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114568260] [2020-08-19 06:47:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:28,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:28,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:28,730 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 06:47:28,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114568260] [2020-08-19 06:47:28,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:47:28,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:47:28,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065020650] [2020-08-19 06:47:28,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:47:28,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:28,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:47:28,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:47:28,759 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-19 06:47:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:28,886 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-19 06:47:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:47:28,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 06:47:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:28,899 INFO L225 Difference]: With dead ends: 44 [2020-08-19 06:47:28,899 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 06:47:28,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:47:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 06:47:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 06:47:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:47:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 06:47:28,948 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-19 06:47:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:28,949 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 06:47:28,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:47:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 06:47:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 06:47:28,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:28,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:28,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:47:28,952 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-19 06:47:28,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:28,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796126636] [2020-08-19 06:47:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:28,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:28,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,029 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 06:47:29,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796126636] [2020-08-19 06:47:29,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:47:29,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:47:29,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205228834] [2020-08-19 06:47:29,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:47:29,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:29,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:47:29,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:47:29,040 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-19 06:47:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:29,163 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-19 06:47:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:47:29,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-19 06:47:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:29,168 INFO L225 Difference]: With dead ends: 36 [2020-08-19 06:47:29,168 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 06:47:29,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:47:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 06:47:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 06:47:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:47:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 06:47:29,193 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-19 06:47:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:29,195 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 06:47:29,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:47:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 06:47:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:47:29,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:29,200 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:29,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:47:29,203 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:29,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-19 06:47:29,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:29,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391428834] [2020-08-19 06:47:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 06:47:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 06:47:29,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391428834] [2020-08-19 06:47:29,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:29,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:47:29,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889277323] [2020-08-19 06:47:29,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:47:29,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:29,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:47:29,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:47:29,411 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-19 06:47:29,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:29,517 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-19 06:47:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:47:29,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-19 06:47:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:29,520 INFO L225 Difference]: With dead ends: 58 [2020-08-19 06:47:29,520 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 06:47:29,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:47:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 06:47:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-19 06:47:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 06:47:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-19 06:47:29,531 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-19 06:47:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:29,532 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-19 06:47:29,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:47:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-19 06:47:29,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:47:29,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:29,534 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:29,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:47:29,535 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:29,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:29,536 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-19 06:47:29,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:29,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414944314] [2020-08-19 06:47:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 06:47:29,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414944314] [2020-08-19 06:47:29,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:29,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:47:29,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597822636] [2020-08-19 06:47:29,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:47:29,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:47:29,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:47:29,754 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-08-19 06:47:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:29,818 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-08-19 06:47:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:47:29,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-08-19 06:47:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:29,821 INFO L225 Difference]: With dead ends: 46 [2020-08-19 06:47:29,821 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 06:47:29,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:47:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 06:47:29,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-08-19 06:47:29,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 06:47:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-19 06:47:29,833 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2020-08-19 06:47:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:29,833 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-19 06:47:29,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:47:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-19 06:47:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 06:47:29,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:29,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:29,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:47:29,836 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-08-19 06:47:29,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:29,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152489273] [2020-08-19 06:47:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 06:47:29,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152489273] [2020-08-19 06:47:29,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:29,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:47:29,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579447853] [2020-08-19 06:47:29,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:47:29,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:29,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:47:29,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:47:29,927 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2020-08-19 06:47:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:30,041 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2020-08-19 06:47:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:47:30,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-08-19 06:47:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:30,043 INFO L225 Difference]: With dead ends: 71 [2020-08-19 06:47:30,043 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 06:47:30,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:47:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 06:47:30,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 06:47:30,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 06:47:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-08-19 06:47:30,053 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 28 [2020-08-19 06:47:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:30,053 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-08-19 06:47:30,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:47:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-08-19 06:47:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 06:47:30,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:30,056 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:30,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:47:30,056 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-19 06:47:30,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:30,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651101116] [2020-08-19 06:47:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 06:47:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:47:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 06:47:30,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651101116] [2020-08-19 06:47:30,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:30,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:47:30,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229392605] [2020-08-19 06:47:30,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:47:30,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:30,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:47:30,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:47:30,199 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 7 states. [2020-08-19 06:47:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:30,267 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2020-08-19 06:47:30,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:47:30,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-08-19 06:47:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:30,269 INFO L225 Difference]: With dead ends: 74 [2020-08-19 06:47:30,269 INFO L226 Difference]: Without dead ends: 41 [2020-08-19 06:47:30,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:47:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-19 06:47:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-19 06:47:30,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-19 06:47:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-08-19 06:47:30,279 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 39 [2020-08-19 06:47:30,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:30,279 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-08-19 06:47:30,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:47:30,279 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-08-19 06:47:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 06:47:30,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:30,281 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:30,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:47:30,282 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:30,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:30,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-19 06:47:30,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:30,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025598305] [2020-08-19 06:47:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 06:47:30,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025598305] [2020-08-19 06:47:30,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:30,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:47:30,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314374857] [2020-08-19 06:47:30,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:47:30,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:30,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:47:30,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:47:30,437 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 8 states. [2020-08-19 06:47:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:30,563 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-08-19 06:47:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:47:30,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 06:47:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:30,565 INFO L225 Difference]: With dead ends: 41 [2020-08-19 06:47:30,565 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:47:30,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:47:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:47:30,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:47:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:47:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:47:30,568 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2020-08-19 06:47:30,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:30,568 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:47:30,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:47:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:47:30,568 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:47:30,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:47:30,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:47:30,714 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 06:47:30,715 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:47:30,715 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:47:30,715 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:47:30,715 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:47:30,715 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:47:30,716 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-19 06:47:30,716 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-19 06:47:30,716 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-19 06:47:30,716 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-19 06:47:30,716 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-19 06:47:30,717 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-19 06:47:30,717 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= main_~x~0 2)) [2020-08-19 06:47:30,717 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-19 06:47:30,717 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-19 06:47:30,718 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-19 06:47:30,718 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-19 06:47:30,718 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-19 06:47:30,718 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-19 06:47:30,719 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-19 06:47:30,719 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-19 06:47:30,719 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-19 06:47:30,719 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-19 06:47:30,719 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-19 06:47:30,719 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-19 06:47:30,720 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-08-19 06:47:30,720 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-19 06:47:30,720 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= |fibo1_#t~ret0| 1) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse0))) [2020-08-19 06:47:30,720 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-19 06:47:30,721 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-19 06:47:30,721 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-19 06:47:30,721 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-19 06:47:30,721 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-19 06:47:30,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:47:30 BoogieIcfgContainer [2020-08-19 06:47:30,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:47:30,731 INFO L168 Benchmark]: Toolchain (without parser) took 3148.59 ms. Allocated memory was 147.3 MB in the beginning and 237.0 MB in the end (delta: 89.7 MB). Free memory was 102.4 MB in the beginning and 86.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 105.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:30,732 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 06:47:30,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.51 ms. Allocated memory is still 147.3 MB. Free memory was 102.2 MB in the beginning and 92.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:30,734 INFO L168 Benchmark]: Boogie Preprocessor took 131.78 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 92.5 MB in the beginning and 181.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:30,735 INFO L168 Benchmark]: RCFGBuilder took 286.78 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 168.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:30,736 INFO L168 Benchmark]: TraceAbstraction took 2415.78 ms. Allocated memory was 203.4 MB in the beginning and 237.0 MB in the end (delta: 33.6 MB). Free memory was 167.7 MB in the beginning and 86.4 MB in the end (delta: 81.3 MB). Peak memory consumption was 114.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:30,745 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.51 ms. Allocated memory is still 147.3 MB. Free memory was 102.2 MB in the beginning and 92.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.78 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 92.5 MB in the beginning and 181.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 286.78 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 168.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2415.78 ms. Allocated memory was 203.4 MB in the beginning and 237.0 MB in the end (delta: 33.6 MB). Free memory was 167.7 MB in the beginning and 86.4 MB in the end (delta: 81.3 MB). Peak memory consumption was 114.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 212 SDtfs, 96 SDslu, 767 SDs, 0 SdLazy, 354 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 65 PreInvPairs, 73 NumberOfFragments, 57 HoareAnnotationTreeSize, 65 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 187 NumberOfCodeBlocks, 187 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 10186 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 27/46 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...