/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:19:09,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:19:09,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:19:09,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:19:09,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:19:09,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:19:09,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:19:09,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:19:09,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:19:09,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:19:09,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:19:09,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:19:09,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:19:09,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:19:09,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:19:09,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:19:09,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:19:09,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:19:09,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:19:09,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:19:09,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:19:09,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:19:09,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:19:09,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:19:09,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:19:09,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:19:09,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:19:09,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:19:09,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:19:09,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:19:09,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:19:09,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:19:09,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:19:09,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:19:09,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:19:09,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:19:09,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:19:09,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:19:09,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:19:09,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:19:09,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:19:09,434 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 [2020-08-21 17:19:09,481 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:19:09,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:19:09,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:19:09,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:19:09,484 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:19:09,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:19:09,485 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:19:09,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:19:09,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:19:09,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:19:09,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:19:09,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:19:09,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:19:09,488 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:19:09,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:19:09,488 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:19:09,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:19:09,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:19:09,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:19:09,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:19:09,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:19:09,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:19:09,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:19:09,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:19:09,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:19:09,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:19:09,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:19:09,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:19:09,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:19:09,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:19:09,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:19:09,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:19:09,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:19:09,832 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:19:09,833 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:19:09,834 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-08-21 17:19:09,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7a2b7b75/d54f3b4a7c9640d6831fe2216cb2b21e/FLAGb862004ab [2020-08-21 17:19:10,416 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:19:10,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-08-21 17:19:10,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7a2b7b75/d54f3b4a7c9640d6831fe2216cb2b21e/FLAGb862004ab [2020-08-21 17:19:10,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7a2b7b75/d54f3b4a7c9640d6831fe2216cb2b21e [2020-08-21 17:19:10,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:19:10,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:19:10,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:19:10,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:19:10,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:19:10,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:19:10" (1/1) ... [2020-08-21 17:19:10,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6752e30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:10, skipping insertion in model container [2020-08-21 17:19:10,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:19:10" (1/1) ... [2020-08-21 17:19:10,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:19:10,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:19:11,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:19:11,025 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:19:11,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:19:11,052 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:19:11,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:11 WrapperNode [2020-08-21 17:19:11,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:19:11,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:19:11,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:19:11,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:19:11,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:11" (1/1) ... [2020-08-21 17:19:11,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:11" (1/1) ... [2020-08-21 17:19:11,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:11" (1/1) ... [2020-08-21 17:19:11,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:11" (1/1) ... [2020-08-21 17:19:11,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:11" (1/1) ... [2020-08-21 17:19:11,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:11" (1/1) ... [2020-08-21 17:19:11,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:11" (1/1) ... [2020-08-21 17:19:11,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:19:11,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:19:11,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:19:11,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:19:11,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:11" (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 [2020-08-21 17:19:11,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:19:11,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:19:11,253 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-21 17:19:11,253 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-21 17:19:11,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:19:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:19:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:19:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-21 17:19:11,254 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-21 17:19:11,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:19:11,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:19:11,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:19:11,449 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:19:11,450 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 17:19:11,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:19:11 BoogieIcfgContainer [2020-08-21 17:19:11,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:19:11,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:19:11,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:19:11,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:19:11,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:19:10" (1/3) ... [2020-08-21 17:19:11,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6570a505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:19:11, skipping insertion in model container [2020-08-21 17:19:11,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:11" (2/3) ... [2020-08-21 17:19:11,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6570a505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:19:11, skipping insertion in model container [2020-08-21 17:19:11,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:19:11" (3/3) ... [2020-08-21 17:19:11,466 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-08-21 17:19:11,478 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:19:11,487 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:19:11,519 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:19:11,585 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:19:11,586 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:19:11,586 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:19:11,586 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:19:11,588 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:19:11,588 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:19:11,589 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:19:11,589 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:19:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 17:19:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 17:19:11,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:11,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:19:11,626 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:11,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-21 17:19:11,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:11,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844628653] [2020-08-21 17:19:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:11,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:11,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:19:11,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844628653] [2020-08-21 17:19:11,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:19:11,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:19:11,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199871411] [2020-08-21 17:19:11,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:19:11,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:19:11,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:19:11,867 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-21 17:19:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:11,968 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-21 17:19:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:19:11,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 17:19:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:11,979 INFO L225 Difference]: With dead ends: 44 [2020-08-21 17:19:11,979 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 17:19:11,984 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 [2020-08-21 17:19:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 17:19:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 17:19:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 17:19:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 17:19:12,031 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-21 17:19:12,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:12,031 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 17:19:12,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:19:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 17:19:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 17:19:12,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:12,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:19:12,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:19:12,035 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:12,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-21 17:19:12,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:12,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543047360] [2020-08-21 17:19:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:19:12,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543047360] [2020-08-21 17:19:12,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:19:12,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:19:12,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201715576] [2020-08-21 17:19:12,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:19:12,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:12,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:19:12,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:19:12,111 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-21 17:19:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:12,182 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-21 17:19:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:19:12,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 17:19:12,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:12,184 INFO L225 Difference]: With dead ends: 36 [2020-08-21 17:19:12,185 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 17:19:12,186 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 [2020-08-21 17:19:12,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 17:19:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 17:19:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 17:19:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 17:19:12,196 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-21 17:19:12,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:12,197 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 17:19:12,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:19:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 17:19:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 17:19:12,199 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:12,199 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] [2020-08-21 17:19:12,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:19:12,200 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:12,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-21 17:19:12,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:12,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957248978] [2020-08-21 17:19:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:19:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 17:19:12,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957248978] [2020-08-21 17:19:12,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:12,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:19:12,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851433841] [2020-08-21 17:19:12,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:19:12,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:12,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:19:12,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:19:12,348 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-21 17:19:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:12,442 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-21 17:19:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:19:12,443 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 17:19:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:12,445 INFO L225 Difference]: With dead ends: 58 [2020-08-21 17:19:12,445 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 17:19:12,446 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 [2020-08-21 17:19:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 17:19:12,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 17:19:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 17:19:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-21 17:19:12,458 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-21 17:19:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:12,458 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-21 17:19:12,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:19:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-21 17:19:12,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 17:19:12,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:12,461 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] [2020-08-21 17:19:12,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:19:12,462 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:12,463 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-21 17:19:12,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:12,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063104635] [2020-08-21 17:19:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:19:12,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063104635] [2020-08-21 17:19:12,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:12,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:19:12,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945747996] [2020-08-21 17:19:12,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:19:12,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:12,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:19:12,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:19:12,743 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-08-21 17:19:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:12,834 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-08-21 17:19:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:19:12,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-08-21 17:19:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:12,837 INFO L225 Difference]: With dead ends: 46 [2020-08-21 17:19:12,838 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 17:19:12,838 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 [2020-08-21 17:19:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 17:19:12,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-08-21 17:19:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 17:19:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-21 17:19:12,849 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2020-08-21 17:19:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:12,850 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-21 17:19:12,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:19:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-21 17:19:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:19:12,852 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:12,853 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] [2020-08-21 17:19:12,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:19:12,853 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:12,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:12,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-08-21 17:19:12,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:12,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917913696] [2020-08-21 17:19:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:19:12,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917913696] [2020-08-21 17:19:12,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:12,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:19:12,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119633169] [2020-08-21 17:19:12,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:19:12,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:12,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:19:12,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:19:12,948 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2020-08-21 17:19:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:13,073 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2020-08-21 17:19:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:19:13,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-08-21 17:19:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:13,075 INFO L225 Difference]: With dead ends: 71 [2020-08-21 17:19:13,076 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 17:19:13,077 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 [2020-08-21 17:19:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 17:19:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 17:19:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 17:19:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-08-21 17:19:13,086 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 28 [2020-08-21 17:19:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:13,087 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-08-21 17:19:13,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:19:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-08-21 17:19:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 17:19:13,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:13,089 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] [2020-08-21 17:19:13,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:19:13,090 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:13,090 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-21 17:19:13,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:13,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21299809] [2020-08-21 17:19:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:19:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:19:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 17:19:13,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21299809] [2020-08-21 17:19:13,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:13,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:19:13,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448436217] [2020-08-21 17:19:13,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:19:13,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:13,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:19:13,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:19:13,202 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 7 states. [2020-08-21 17:19:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:13,287 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2020-08-21 17:19:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:19:13,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-08-21 17:19:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:13,290 INFO L225 Difference]: With dead ends: 74 [2020-08-21 17:19:13,290 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 17:19:13,291 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 [2020-08-21 17:19:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 17:19:13,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-21 17:19:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 17:19:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-08-21 17:19:13,300 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 39 [2020-08-21 17:19:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:13,300 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-08-21 17:19:13,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:19:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-08-21 17:19:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 17:19:13,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:19:13,302 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] [2020-08-21 17:19:13,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:19:13,303 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:19:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:19:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-21 17:19:13,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:19:13,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939568671] [2020-08-21 17:19:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:19:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:19:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:19:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:19:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 17:19:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:19:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:19:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 17:19:13,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939568671] [2020-08-21 17:19:13,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:19:13,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 17:19:13,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467579914] [2020-08-21 17:19:13,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:19:13,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:19:13,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:19:13,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:19:13,440 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 8 states. [2020-08-21 17:19:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:19:13,567 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-08-21 17:19:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 17:19:13,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 17:19:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:19:13,568 INFO L225 Difference]: With dead ends: 41 [2020-08-21 17:19:13,568 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:19:13,570 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 [2020-08-21 17:19:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:19:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:19:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:19:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:19:13,571 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2020-08-21 17:19:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:19:13,571 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:19:13,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:19:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:19:13,572 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:19:13,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:19:13,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:19:13,706 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 17:19:13,707 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:19:13,707 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:19:13,707 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 17:19:13,707 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:19:13,707 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:19:13,708 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-21 17:19:13,708 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-21 17:19:13,708 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-21 17:19:13,708 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-21 17:19:13,708 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-21 17:19:13,709 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 17:19:13,709 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= main_~x~0 2)) [2020-08-21 17:19:13,709 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-21 17:19:13,709 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-21 17:19:13,709 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-21 17:19:13,710 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-21 17:19:13,710 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 17:19:13,710 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))) [2020-08-21 17:19:13,710 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-21 17:19:13,710 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-21 17:19:13,711 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-21 17:19:13,711 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-21 17:19:13,711 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-21 17:19:13,711 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-21 17:19:13,711 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-08-21 17:19:13,712 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-21 17:19:13,712 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))) [2020-08-21 17:19:13,712 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-21 17:19:13,712 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-21 17:19:13,713 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-21 17:19:13,713 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-21 17:19:13,713 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-21 17:19:13,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:19:13 BoogieIcfgContainer [2020-08-21 17:19:13,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:19:13,723 INFO L168 Benchmark]: Toolchain (without parser) took 2924.86 ms. Allocated memory was 137.4 MB in the beginning and 229.6 MB in the end (delta: 92.3 MB). Free memory was 100.3 MB in the beginning and 82.4 MB in the end (delta: 17.9 MB). Peak memory consumption was 110.2 MB. Max. memory is 7.1 GB. [2020-08-21 17:19:13,724 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.5 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-21 17:19:13,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.21 ms. Allocated memory is still 137.4 MB. Free memory was 99.9 MB in the beginning and 90.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-21 17:19:13,726 INFO L168 Benchmark]: Boogie Preprocessor took 117.43 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 90.4 MB in the beginning and 179.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:19:13,727 INFO L168 Benchmark]: RCFGBuilder took 283.62 ms. Allocated memory is still 200.8 MB. Free memory was 179.1 MB in the beginning and 166.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:19:13,728 INFO L168 Benchmark]: TraceAbstraction took 2263.14 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 165.1 MB in the beginning and 82.4 MB in the end (delta: 82.7 MB). Peak memory consumption was 111.5 MB. Max. memory is 7.1 GB. [2020-08-21 17:19:13,732 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 137.4 MB. Free memory was 118.9 MB in the beginning and 118.5 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.21 ms. Allocated memory is still 137.4 MB. Free memory was 99.9 MB in the beginning and 90.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.43 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 90.4 MB in the beginning and 179.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 283.62 ms. Allocated memory is still 200.8 MB. Free memory was 179.1 MB in the beginning and 166.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2263.14 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 165.1 MB in the beginning and 82.4 MB in the end (delta: 82.7 MB). Peak memory consumption was 111.5 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: 1.9s, 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, 0.3s 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, 0.8s 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...