/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:15:20,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:15:20,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:15:20,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:15:20,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:15:20,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:15:20,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:15:20,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:15:20,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:15:20,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:15:20,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:15:20,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:15:20,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:15:20,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:15:20,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:15:20,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:15:20,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:15:20,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:15:20,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:15:20,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:15:20,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:15:20,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:15:20,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:15:20,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:15:20,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:15:20,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:15:20,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:15:20,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:15:20,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:15:20,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:15:20,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:15:20,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:15:20,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:15:20,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:15:20,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:15:20,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:15:20,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:15:20,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:15:20,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:15:20,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:15:20,582 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:15:20,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:15:20,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:15:20,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:15:20,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:15:20,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:15:20,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:15:20,587 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:15:20,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:15:20,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:15:20,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:15:20,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:15:20,589 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:15:20,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:15:20,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:15:20,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:15:20,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:15:20,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:15:20,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:15:20,591 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-07-17 17:15:20,973 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:15:20,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:15:20,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:15:20,998 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:15:20,999 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:15:21,000 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-07-17 17:15:21,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e286bf672/533a2bde7fff4bf78ee1bfdb3a9c4c4b/FLAG495552a14 [2020-07-17 17:15:21,697 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:15:21,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-07-17 17:15:21,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e286bf672/533a2bde7fff4bf78ee1bfdb3a9c4c4b/FLAG495552a14 [2020-07-17 17:15:22,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e286bf672/533a2bde7fff4bf78ee1bfdb3a9c4c4b [2020-07-17 17:15:22,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:15:22,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:15:22,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:15:22,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:15:22,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:15:22,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:15:22" (1/1) ... [2020-07-17 17:15:22,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a6f723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22, skipping insertion in model container [2020-07-17 17:15:22,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:15:22" (1/1) ... [2020-07-17 17:15:22,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:15:22,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:15:22,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:15:22,321 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:15:22,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:15:22,355 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:15:22,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22 WrapperNode [2020-07-17 17:15:22,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:15:22,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:15:22,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:15:22,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:15:22,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22" (1/1) ... [2020-07-17 17:15:22,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22" (1/1) ... [2020-07-17 17:15:22,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22" (1/1) ... [2020-07-17 17:15:22,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22" (1/1) ... [2020-07-17 17:15:22,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22" (1/1) ... [2020-07-17 17:15:22,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22" (1/1) ... [2020-07-17 17:15:22,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22" (1/1) ... [2020-07-17 17:15:22,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:15:22,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:15:22,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:15:22,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:15:22,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 17:15:22,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:15:22,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:15:22,613 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-17 17:15:22,613 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-17 17:15:22,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:15:22,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:15:22,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:15:22,614 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-17 17:15:22,614 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-17 17:15:22,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:15:22,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:15:22,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:15:22,863 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:15:22,864 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:15:22,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:15:22 BoogieIcfgContainer [2020-07-17 17:15:22,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:15:22,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:15:22,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:15:22,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:15:22,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:15:22" (1/3) ... [2020-07-17 17:15:22,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa6de72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:15:22, skipping insertion in model container [2020-07-17 17:15:22,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:15:22" (2/3) ... [2020-07-17 17:15:22,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa6de72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:15:22, skipping insertion in model container [2020-07-17 17:15:22,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:15:22" (3/3) ... [2020-07-17 17:15:22,882 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-07-17 17:15:22,898 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:15:22,910 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:15:22,968 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:15:23,035 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:15:23,036 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:15:23,036 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:15:23,037 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:15:23,038 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:15:23,038 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:15:23,038 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:15:23,039 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:15:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-17 17:15:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 17:15:23,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:15:23,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:15:23,080 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:15:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:15:23,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-07-17 17:15:23,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:15:23,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202983346] [2020-07-17 17:15:23,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:15:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:15:23,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202983346] [2020-07-17 17:15:23,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:15:23,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:15:23,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018126987] [2020-07-17 17:15:23,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:15:23,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:15:23,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:15:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:15:23,372 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-07-17 17:15:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:15:23,534 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-07-17 17:15:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:15:23,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-17 17:15:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:15:23,550 INFO L225 Difference]: With dead ends: 58 [2020-07-17 17:15:23,551 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 17:15:23,556 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 [2020-07-17 17:15:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 17:15:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-17 17:15:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 17:15:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-17 17:15:23,618 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-07-17 17:15:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:15:23,619 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-17 17:15:23,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:15:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-17 17:15:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 17:15:23,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:15:23,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:15:23,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:15:23,624 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:15:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:15:23,625 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-07-17 17:15:23,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:15:23,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327279822] [2020-07-17 17:15:23,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:15:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:15:23,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327279822] [2020-07-17 17:15:23,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:15:23,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:15:23,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943756771] [2020-07-17 17:15:23,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:15:23,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:15:23,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:15:23,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:15:23,712 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-07-17 17:15:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:15:23,826 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-17 17:15:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:15:23,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-17 17:15:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:15:23,833 INFO L225 Difference]: With dead ends: 50 [2020-07-17 17:15:23,834 INFO L226 Difference]: Without dead ends: 44 [2020-07-17 17:15:23,837 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 [2020-07-17 17:15:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-17 17:15:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-17 17:15:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 17:15:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-17 17:15:23,871 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-07-17 17:15:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:15:23,873 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-17 17:15:23,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:15:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-17 17:15:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 17:15:23,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:15:23,878 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, 1, 1, 1, 1, 1] [2020-07-17 17:15:23,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:15:23,879 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:15:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:15:23,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-07-17 17:15:23,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:15:23,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052694366] [2020-07-17 17:15:23,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:15:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:15:24,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052694366] [2020-07-17 17:15:24,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:15:24,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:15:24,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575861439] [2020-07-17 17:15:24,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:15:24,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:15:24,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:15:24,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:15:24,052 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-07-17 17:15:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:15:24,256 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-07-17 17:15:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:15:24,257 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-07-17 17:15:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:15:24,259 INFO L225 Difference]: With dead ends: 82 [2020-07-17 17:15:24,259 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 17:15:24,261 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 [2020-07-17 17:15:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 17:15:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-17 17:15:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-17 17:15:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-07-17 17:15:24,279 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-07-17 17:15:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:15:24,280 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-07-17 17:15:24,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:15:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-07-17 17:15:24,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 17:15:24,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:15:24,283 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, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:15:24,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:15:24,284 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:15:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:15:24,285 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-07-17 17:15:24,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:15:24,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854970176] [2020-07-17 17:15:24,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:15:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 17:15:24,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854970176] [2020-07-17 17:15:24,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:15:24,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:15:24,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927381635] [2020-07-17 17:15:24,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:15:24,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:15:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:15:24,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:15:24,566 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 9 states. [2020-07-17 17:15:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:15:24,757 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-07-17 17:15:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:15:24,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-07-17 17:15:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:15:24,762 INFO L225 Difference]: With dead ends: 66 [2020-07-17 17:15:24,762 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 17:15:24,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-07-17 17:15:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 17:15:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2020-07-17 17:15:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-17 17:15:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-07-17 17:15:24,782 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 34 [2020-07-17 17:15:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:15:24,782 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-07-17 17:15:24,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:15:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-07-17 17:15:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 17:15:24,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:15:24,785 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-07-17 17:15:24,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:15:24,785 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:15:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:15:24,786 INFO L82 PathProgramCache]: Analyzing trace with hash 186293384, now seen corresponding path program 1 times [2020-07-17 17:15:24,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:15:24,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134347549] [2020-07-17 17:15:24,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:15:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 17:15:24,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134347549] [2020-07-17 17:15:24,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:15:24,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:15:24,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770722583] [2020-07-17 17:15:24,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:15:24,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:15:24,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:15:24,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:15:24,933 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 7 states. [2020-07-17 17:15:25,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:15:25,082 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2020-07-17 17:15:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 17:15:25,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-07-17 17:15:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:15:25,086 INFO L225 Difference]: With dead ends: 101 [2020-07-17 17:15:25,086 INFO L226 Difference]: Without dead ends: 54 [2020-07-17 17:15:25,088 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 [2020-07-17 17:15:25,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-17 17:15:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-17 17:15:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 17:15:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-07-17 17:15:25,103 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 35 [2020-07-17 17:15:25,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:15:25,104 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-07-17 17:15:25,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:15:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-07-17 17:15:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-17 17:15:25,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:15:25,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:15:25,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:15:25,108 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:15:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:15:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1875452576, now seen corresponding path program 1 times [2020-07-17 17:15:25,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:15:25,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741633879] [2020-07-17 17:15:25,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:15:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 17:15:25,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741633879] [2020-07-17 17:15:25,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:15:25,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:15:25,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613401567] [2020-07-17 17:15:25,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:15:25,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:15:25,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:15:25,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:15:25,250 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 7 states. [2020-07-17 17:15:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:15:25,362 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-07-17 17:15:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:15:25,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-07-17 17:15:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:15:25,365 INFO L225 Difference]: With dead ends: 104 [2020-07-17 17:15:25,366 INFO L226 Difference]: Without dead ends: 56 [2020-07-17 17:15:25,367 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 [2020-07-17 17:15:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-17 17:15:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-17 17:15:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-17 17:15:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-07-17 17:15:25,384 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 50 [2020-07-17 17:15:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:15:25,384 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-07-17 17:15:25,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:15:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-07-17 17:15:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 17:15:25,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:15:25,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:15:25,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:15:25,388 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:15:25,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:15:25,389 INFO L82 PathProgramCache]: Analyzing trace with hash 104828256, now seen corresponding path program 1 times [2020-07-17 17:15:25,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:15:25,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702651636] [2020-07-17 17:15:25,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:15:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 17:15:25,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702651636] [2020-07-17 17:15:25,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:15:25,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:15:25,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947110733] [2020-07-17 17:15:25,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:15:25,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:15:25,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:15:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:15:25,626 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 8 states. [2020-07-17 17:15:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:15:25,838 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-07-17 17:15:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:15:25,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-17 17:15:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:15:25,841 INFO L225 Difference]: With dead ends: 56 [2020-07-17 17:15:25,841 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 17:15:25,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:15:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 17:15:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 17:15:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 17:15:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 17:15:25,843 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-07-17 17:15:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:15:25,844 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 17:15:25,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:15:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 17:15:25,845 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 17:15:25,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:15:25,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 17:15:26,596 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-07-17 17:15:27,122 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 17:15:27,122 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-17 17:15:27,122 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-17 17:15:27,122 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 17:15:27,122 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 17:15:27,123 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-17 17:15:27,123 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) the Hoare annotation is: false [2020-07-17 17:15:27,123 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-17 17:15:27,123 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 35 42) the Hoare annotation is: (<= 2 main_~x~0) [2020-07-17 17:15:27,124 INFO L264 CegarLoopResult]: At program point mainFINAL(lines 35 42) the Hoare annotation is: (<= 2 main_~x~0) [2020-07-17 17:15:27,124 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: false [2020-07-17 17:15:27,124 INFO L264 CegarLoopResult]: At program point L38(lines 38 40) the Hoare annotation is: (and (<= main_~result~0 1) (< 0 main_~result~0) (<= 2 main_~x~0)) [2020-07-17 17:15:27,129 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 2) (<= 2 main_~x~0)) [2020-07-17 17:15:27,130 INFO L264 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: (and (<= 1 |main_#t~ret4|) (<= |main_#t~ret4| 1) (<= 2 main_~x~0)) [2020-07-17 17:15:27,130 INFO L264 CegarLoopResult]: At program point L38-2(lines 38 40) the Hoare annotation is: (<= 2 main_~x~0) [2020-07-17 17:15:27,130 INFO L264 CegarLoopResult]: At program point L37-2(line 37) the Hoare annotation is: (and (<= 1 |main_#t~ret4|) (<= |main_#t~ret4| 1) (<= 2 main_~x~0)) [2020-07-17 17:15:27,130 INFO L264 CegarLoopResult]: At program point L37-3(line 37) the Hoare annotation is: (and (<= 1 |main_#t~ret4|) (<= main_~result~0 1) (<= |main_#t~ret4| 1) (< 0 main_~result~0) (<= 2 main_~x~0)) [2020-07-17 17:15:27,131 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-17 17:15:27,131 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 17:15:27,133 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 17:15:27,133 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= |fibo2_#in~n| 1) (<= 1 |fibo2_#in~n|) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 17:15:27,133 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 17:15:27,133 INFO L264 CegarLoopResult]: At program point L20(lines 20 24) the Hoare annotation is: (and (<= 1 |fibo2_#in~n|) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 17:15:27,134 INFO L264 CegarLoopResult]: At program point L23-3(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 17:15:27,134 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= |fibo2_#in~n| 0) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 17:15:27,134 INFO L264 CegarLoopResult]: At program point L23-4(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 17:15:27,134 INFO L264 CegarLoopResult]: At program point L18(lines 18 24) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 17:15:27,135 INFO L264 CegarLoopResult]: At program point L23-5(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 17:15:27,135 INFO L264 CegarLoopResult]: At program point L23-6(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 17:15:27,135 INFO L264 CegarLoopResult]: At program point fibo2FINAL(lines 17 25) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (let ((.cse1 (<= |fibo2_#in~n| 1)) (.cse2 (and (<= |fibo2_#in~n| 0) (<= |fibo2_#res| 0) (<= 0 |fibo2_#res|) .cse0))) (and (or (and (< 1 fibo2_~n) .cse0) (and .cse1 (<= 1 |fibo2_#in~n|)) .cse2) (or (not .cse1) (and (<= 1 |fibo2_#res|) (<= |fibo2_#res| 1) .cse0) .cse2)))) [2020-07-17 17:15:27,136 INFO L264 CegarLoopResult]: At program point fibo2EXIT(lines 17 25) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (let ((.cse1 (<= |fibo2_#in~n| 1)) (.cse2 (and (<= |fibo2_#in~n| 0) (<= |fibo2_#res| 0) (<= 0 |fibo2_#res|) .cse0))) (and (or (and (< 1 fibo2_~n) .cse0) (and .cse1 (<= 1 |fibo2_#in~n|)) .cse2) (or (not .cse1) (and (<= 1 |fibo2_#res|) (<= |fibo2_#res| 1) .cse0) .cse2)))) [2020-07-17 17:15:27,136 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-17 17:15:27,136 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 17:15:27,136 INFO L264 CegarLoopResult]: At program point L13-1(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (and (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) .cse0))) [2020-07-17 17:15:27,137 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= |fibo1_#in~n| 1) (< 0 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 17:15:27,137 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (and (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) .cse0))) [2020-07-17 17:15:27,137 INFO L264 CegarLoopResult]: At program point fibo1FINAL(lines 7 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (and .cse0 (or (<= |fibo1_#in~n| 1) (and (<= 1 |fibo1_#res|) (<= |fibo1_#res| 1)))))) [2020-07-17 17:15:27,138 INFO L264 CegarLoopResult]: At program point L10(lines 10 14) the Hoare annotation is: (and (< 0 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 17:15:27,138 INFO L264 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (let ((.cse1 (+ |fibo1_#t~ret1| |fibo1_#t~ret0|))) (and (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) (<= 1 .cse1) .cse0 (<= .cse1 1))))) [2020-07-17 17:15:27,138 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| 0)) [2020-07-17 17:15:27,138 INFO L264 CegarLoopResult]: At program point L13-4(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (let ((.cse1 (+ |fibo1_#t~ret1| |fibo1_#t~ret0|))) (and (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) (<= 1 .cse1) .cse0 (<= .cse1 1))))) [2020-07-17 17:15:27,139 INFO L264 CegarLoopResult]: At program point L8(lines 8 14) the Hoare annotation is: (= fibo1_~n |fibo1_#in~n|) [2020-07-17 17:15:27,139 INFO L264 CegarLoopResult]: At program point L13-5(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (let ((.cse1 (+ |fibo1_#t~ret1| |fibo1_#t~ret0|))) (and (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) (<= 1 .cse1) .cse0 (<= 1 |fibo1_#res|) (<= |fibo1_#res| 1) (<= .cse1 1))))) [2020-07-17 17:15:27,139 INFO L264 CegarLoopResult]: At program point L13-6(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (and (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) .cse0 (<= 1 |fibo1_#res|) (<= |fibo1_#res| 1)))) [2020-07-17 17:15:27,139 INFO L264 CegarLoopResult]: At program point fibo1EXIT(lines 7 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (and .cse0 (or (<= |fibo1_#in~n| 1) (and (<= 1 |fibo1_#res|) (<= |fibo1_#res| 1)))))) [2020-07-17 17:15:27,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:15:27 BoogieIcfgContainer [2020-07-17 17:15:27,179 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:15:27,182 INFO L168 Benchmark]: Toolchain (without parser) took 5138.15 ms. Allocated memory was 141.0 MB in the beginning and 257.9 MB in the end (delta: 116.9 MB). Free memory was 99.3 MB in the beginning and 225.8 MB in the end (delta: -126.5 MB). Peak memory consumption was 133.7 MB. Max. memory is 7.1 GB. [2020-07-17 17:15:27,184 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 141.0 MB. Free memory was 117.5 MB in the beginning and 117.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-17 17:15:27,185 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.17 ms. Allocated memory is still 141.0 MB. Free memory was 98.9 MB in the beginning and 89.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-17 17:15:27,186 INFO L168 Benchmark]: Boogie Preprocessor took 168.18 ms. Allocated memory was 141.0 MB in the beginning and 199.8 MB in the end (delta: 58.7 MB). Free memory was 89.2 MB in the beginning and 178.9 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:15:27,189 INFO L168 Benchmark]: RCFGBuilder took 344.39 ms. Allocated memory is still 199.8 MB. Free memory was 178.9 MB in the beginning and 164.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:15:27,190 INFO L168 Benchmark]: TraceAbstraction took 4306.28 ms. Allocated memory was 199.8 MB in the beginning and 257.9 MB in the end (delta: 58.2 MB). Free memory was 163.4 MB in the beginning and 225.8 MB in the end (delta: -62.5 MB). Peak memory consumption was 139.1 MB. Max. memory is 7.1 GB. [2020-07-17 17:15:27,200 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 141.0 MB. Free memory was 117.5 MB in the beginning and 117.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.17 ms. Allocated memory is still 141.0 MB. Free memory was 98.9 MB in the beginning and 89.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 168.18 ms. Allocated memory was 141.0 MB in the beginning and 199.8 MB in the end (delta: 58.7 MB). Free memory was 89.2 MB in the beginning and 178.9 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.39 ms. Allocated memory is still 199.8 MB. Free memory was 178.9 MB in the beginning and 164.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4306.28 ms. Allocated memory was 199.8 MB in the beginning and 257.9 MB in the end (delta: 58.2 MB). Free memory was 163.4 MB in the beginning and 225.8 MB in the end (delta: -62.5 MB). Peak memory consumption was 139.1 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 - ProcedureContractResult [Line: 35]: Procedure Contract for main Derived contract for procedure main: 2 <= x - ProcedureContractResult [Line: 17]: Procedure Contract for fibo2 Derived contract for procedure fibo2: (((1 < n && n == \old(n)) || (\old(n) <= 1 && 1 <= \old(n))) || (((\old(n) <= 0 && \result <= 0) && 0 <= \result) && n == \old(n))) && ((!(\old(n) <= 1) || ((1 <= \result && \result <= 1) && n == \old(n))) || (((\old(n) <= 0 && \result <= 0) && 0 <= \result) && n == \old(n))) - ProcedureContractResult [Line: 7]: Procedure Contract for fibo1 Derived contract for procedure fibo1: (3 <= \old(n) && n == \old(n)) || (n == \old(n) && (\old(n) <= 1 || (1 <= \result && \result <= 1))) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 294 SDtfs, 177 SDslu, 1053 SDs, 0 SdLazy, 372 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred 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: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 45 LocationsWithAnnotation, 297 PreInvPairs, 434 NumberOfFragments, 511 HoareAnnotationTreeSize, 297 FomulaSimplifications, 2072 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 45 FomulaSimplificationsInter, 610 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 236 NumberOfCodeBlocks, 236 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 229 ConstructedInterpolants, 0 QuantifiedInterpolants, 16943 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 27/49 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...