/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:33:36,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:33:36,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:33:36,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 18:33:36,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:33:36,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:33:36,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:33:36,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:33:36,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:33:36,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:33:36,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:33:36,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:33:36,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:33:36,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:33:36,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:33:36,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:33:36,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:33:36,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:33:36,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:33:36,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:33:36,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:33:36,457 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:33:36,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:33:36,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:33:36,459 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:33:36,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:33:36,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:33:36,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:33:36,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:33:36,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:33:36,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:33:36,461 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:33:36,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:33:36,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:33:36,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:33:36,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:33:36,462 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:33:36,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:33:36,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:33:36,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:33:36,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:33:36,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:33:36,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:33:36,464 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:33:36,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:33:36,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:33:36,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:33:36,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:33:36,766 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:33:36,767 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-08-22 18:33:36,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2bdd369/f42bbead6fbb4514824647ed977e7c73/FLAG90b422046 [2020-08-22 18:33:37,233 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:33:37,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-08-22 18:33:37,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2bdd369/f42bbead6fbb4514824647ed977e7c73/FLAG90b422046 [2020-08-22 18:33:37,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2bdd369/f42bbead6fbb4514824647ed977e7c73 [2020-08-22 18:33:37,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:33:37,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:33:37,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:37,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:33:37,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:33:37,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:37" (1/1) ... [2020-08-22 18:33:37,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b15da80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37, skipping insertion in model container [2020-08-22 18:33:37,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:37" (1/1) ... [2020-08-22 18:33:37,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:33:37,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:33:37,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:37,852 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:33:37,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:37,888 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:33:37,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37 WrapperNode [2020-08-22 18:33:37,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:37,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:33:37,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:33:37,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:33:37,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37" (1/1) ... [2020-08-22 18:33:37,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37" (1/1) ... [2020-08-22 18:33:38,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37" (1/1) ... [2020-08-22 18:33:38,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37" (1/1) ... [2020-08-22 18:33:38,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37" (1/1) ... [2020-08-22 18:33:38,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37" (1/1) ... [2020-08-22 18:33:38,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37" (1/1) ... [2020-08-22 18:33:38,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:33:38,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:33:38,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:33:38,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:33:38,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37" (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 [2020-08-22 18:33:38,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:33:38,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:33:38,098 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-08-22 18:33:38,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:33:38,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:33:38,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:33:38,098 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-08-22 18:33:38,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:33:38,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:33:38,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:33:38,288 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:33:38,289 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:33:38,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:38 BoogieIcfgContainer [2020-08-22 18:33:38,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:33:38,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:33:38,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:33:38,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:33:38,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:33:37" (1/3) ... [2020-08-22 18:33:38,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236b72d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:38, skipping insertion in model container [2020-08-22 18:33:38,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:37" (2/3) ... [2020-08-22 18:33:38,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236b72d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:38, skipping insertion in model container [2020-08-22 18:33:38,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:38" (3/3) ... [2020-08-22 18:33:38,303 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-08-22 18:33:38,317 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:33:38,332 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:33:38,363 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:33:38,406 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:33:38,406 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:33:38,406 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:33:38,407 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:33:38,407 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:33:38,407 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:33:38,407 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:33:38,407 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:33:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 18:33:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 18:33:38,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:38,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:38,438 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1379859160, now seen corresponding path program 1 times [2020-08-22 18:33:38,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:38,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85094616] [2020-08-22 18:33:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:38,533 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:38,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:38,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 18:33:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:33:38,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85094616] [2020-08-22 18:33:38,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:38,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:33:38,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523277815] [2020-08-22 18:33:38,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:33:38,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:38,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:33:38,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:38,752 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 7 states. [2020-08-22 18:33:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:38,963 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-22 18:33:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 18:33:38,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-22 18:33:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:38,977 INFO L225 Difference]: With dead ends: 50 [2020-08-22 18:33:38,977 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 18:33:38,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 18:33:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-22 18:33:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 18:33:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 18:33:39,034 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2020-08-22 18:33:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:39,035 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 18:33:39,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:33:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 18:33:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 18:33:39,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:39,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:39,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:33:39,039 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:39,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2056866127, now seen corresponding path program 1 times [2020-08-22 18:33:39,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:39,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448623031] [2020-08-22 18:33:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:39,042 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 18:33:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:33:39,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448623031] [2020-08-22 18:33:39,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:39,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:33:39,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300918609] [2020-08-22 18:33:39,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:33:39,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:39,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:33:39,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:39,147 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-08-22 18:33:39,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:39,319 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-08-22 18:33:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 18:33:39,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-22 18:33:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:39,322 INFO L225 Difference]: With dead ends: 39 [2020-08-22 18:33:39,323 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 18:33:39,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 18:33:39,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-08-22 18:33:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 18:33:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 18:33:39,335 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2020-08-22 18:33:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:39,336 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 18:33:39,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:33:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 18:33:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 18:33:39,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:39,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-08-22 18:33:39,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:33:39,339 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:39,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:39,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1274124978, now seen corresponding path program 1 times [2020-08-22 18:33:39,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:39,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640101416] [2020-08-22 18:33:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:39,342 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 18:33:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 18:33:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 18:33:39,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640101416] [2020-08-22 18:33:39,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:39,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:39,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642555516] [2020-08-22 18:33:39,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:39,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:39,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:39,451 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2020-08-22 18:33:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:39,552 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-08-22 18:33:39,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:33:39,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-08-22 18:33:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:39,554 INFO L225 Difference]: With dead ends: 55 [2020-08-22 18:33:39,554 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 18:33:39,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 18:33:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 18:33:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 18:33:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-22 18:33:39,567 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 36 [2020-08-22 18:33:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:39,567 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-22 18:33:39,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-22 18:33:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 18:33:39,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:39,570 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:39,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:33:39,570 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:39,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:39,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2043121517, now seen corresponding path program 1 times [2020-08-22 18:33:39,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:39,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898994714] [2020-08-22 18:33:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:39,574 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 18:33:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 18:33:39,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898994714] [2020-08-22 18:33:39,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:39,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:33:39,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594431712] [2020-08-22 18:33:39,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:33:39,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:33:39,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:39,763 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 11 states. [2020-08-22 18:33:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:40,053 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-08-22 18:33:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 18:33:40,055 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-22 18:33:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:40,058 INFO L225 Difference]: With dead ends: 51 [2020-08-22 18:33:40,058 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 18:33:40,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:33:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 18:33:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-08-22 18:33:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 18:33:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-08-22 18:33:40,087 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 37 [2020-08-22 18:33:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:40,090 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-08-22 18:33:40,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:33:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-08-22 18:33:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 18:33:40,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:40,095 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:40,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:33:40,097 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1985616609, now seen corresponding path program 1 times [2020-08-22 18:33:40,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:40,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544514860] [2020-08-22 18:33:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:40,101 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 18:33:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 18:33:40,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544514860] [2020-08-22 18:33:40,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:40,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:40,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790273576] [2020-08-22 18:33:40,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:40,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:40,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:40,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:40,242 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 6 states. [2020-08-22 18:33:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:40,364 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-08-22 18:33:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 18:33:40,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-22 18:33:40,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:40,367 INFO L225 Difference]: With dead ends: 76 [2020-08-22 18:33:40,367 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 18:33:40,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 18:33:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-22 18:33:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 18:33:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-08-22 18:33:40,380 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 56 [2020-08-22 18:33:40,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:40,381 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-08-22 18:33:40,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:40,381 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-08-22 18:33:40,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 18:33:40,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:40,383 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:40,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 18:33:40,384 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:40,384 INFO L82 PathProgramCache]: Analyzing trace with hash 847598467, now seen corresponding path program 2 times [2020-08-22 18:33:40,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:40,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274517262] [2020-08-22 18:33:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:40,387 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 18:33:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 18:33:40,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274517262] [2020-08-22 18:33:40,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:40,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:33:40,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759736202] [2020-08-22 18:33:40,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:33:40,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:40,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:33:40,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:40,539 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 7 states. [2020-08-22 18:33:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:40,637 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-08-22 18:33:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:33:40,638 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-08-22 18:33:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:40,641 INFO L225 Difference]: With dead ends: 77 [2020-08-22 18:33:40,641 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 18:33:40,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 18:33:40,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-22 18:33:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 18:33:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-08-22 18:33:40,660 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 54 [2020-08-22 18:33:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:40,661 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-08-22 18:33:40,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:33:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-08-22 18:33:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 18:33:40,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:40,666 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:40,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 18:33:40,667 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:40,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1275966376, now seen corresponding path program 3 times [2020-08-22 18:33:40,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:40,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815575812] [2020-08-22 18:33:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:40,671 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 18:33:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 18:33:40,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815575812] [2020-08-22 18:33:40,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:40,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 18:33:40,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094057104] [2020-08-22 18:33:40,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 18:33:40,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:40,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 18:33:40,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:40,839 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 13 states. [2020-08-22 18:33:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:41,174 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-08-22 18:33:41,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 18:33:41,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-22 18:33:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:41,177 INFO L225 Difference]: With dead ends: 61 [2020-08-22 18:33:41,178 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 18:33:41,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:33:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 18:33:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-08-22 18:33:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 18:33:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-08-22 18:33:41,204 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 55 [2020-08-22 18:33:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:41,205 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-08-22 18:33:41,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 18:33:41,205 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-08-22 18:33:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 18:33:41,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:41,208 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:41,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 18:33:41,208 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash -778718797, now seen corresponding path program 4 times [2020-08-22 18:33:41,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:41,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158805729] [2020-08-22 18:33:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:41,212 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 18:33:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-08-22 18:33:41,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158805729] [2020-08-22 18:33:41,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:41,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:33:41,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604702391] [2020-08-22 18:33:41,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:33:41,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:33:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:41,444 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 8 states. [2020-08-22 18:33:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:41,613 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2020-08-22 18:33:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:33:41,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-08-22 18:33:41,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:41,616 INFO L225 Difference]: With dead ends: 98 [2020-08-22 18:33:41,616 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 18:33:41,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 18:33:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-08-22 18:33:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 18:33:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-08-22 18:33:41,639 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 90 [2020-08-22 18:33:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:41,640 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-08-22 18:33:41,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:33:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-08-22 18:33:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 18:33:41,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:41,642 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:41,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 18:33:41,643 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:41,644 INFO L82 PathProgramCache]: Analyzing trace with hash 237402259, now seen corresponding path program 5 times [2020-08-22 18:33:41,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:41,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461806428] [2020-08-22 18:33:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:41,646 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 18:33:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:33:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:33:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 23 proven. 69 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-08-22 18:33:41,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461806428] [2020-08-22 18:33:41,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:41,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:41,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133474285] [2020-08-22 18:33:41,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:41,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:41,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:41,978 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-08-22 18:33:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:42,236 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2020-08-22 18:33:42,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 18:33:42,237 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-08-22 18:33:42,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:42,244 INFO L225 Difference]: With dead ends: 126 [2020-08-22 18:33:42,244 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 18:33:42,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:33:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 18:33:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-08-22 18:33:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 18:33:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-08-22 18:33:42,285 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 126 [2020-08-22 18:33:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:42,286 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-08-22 18:33:42,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-08-22 18:33:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 18:33:42,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:42,290 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:42,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 18:33:42,291 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1698410615, now seen corresponding path program 6 times [2020-08-22 18:33:42,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:42,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491408809] [2020-08-22 18:33:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:42,295 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 18:33:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:33:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 18:33:42,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491408809] [2020-08-22 18:33:42,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:42,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 18:33:42,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022455050] [2020-08-22 18:33:42,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 18:33:42,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:42,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 18:33:42,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:42,617 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 15 states. [2020-08-22 18:33:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:42,958 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2020-08-22 18:33:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 18:33:42,959 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 90 [2020-08-22 18:33:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:42,960 INFO L225 Difference]: With dead ends: 70 [2020-08-22 18:33:42,960 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 18:33:42,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2020-08-22 18:33:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 18:33:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 18:33:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 18:33:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 18:33:42,964 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2020-08-22 18:33:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:42,964 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 18:33:42,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 18:33:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 18:33:42,965 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 18:33:42,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 18:33:42,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 18:33:43,784 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 19 [2020-08-22 18:33:44,280 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 22 [2020-08-22 18:33:44,598 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 19 [2020-08-22 18:33:44,645 INFO L264 CegarLoopResult]: At program point fibonacciFINAL(lines 14 22) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 0 |fibonacci_#res|) (or (and (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1)) (<= 2 |fibonacci_#in~n|)) (and (<= |fibonacci_#in~n| 1) (<= 1 |fibonacci_#res|)) (<= |fibonacci_#in~n| 0))) [2020-08-22 18:33:44,645 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-08-22 18:33:44,645 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 2 |fibonacci_#in~n|)) [2020-08-22 18:33:44,645 INFO L264 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| 2) (<= 1 |fibonacci_#t~ret0|) .cse0 (<= 2 |fibonacci_#in~n|)) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 |fibonacci_#in~n|)))) [2020-08-22 18:33:44,645 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= |fibonacci_#in~n| 1) (= fibonacci_~n |fibonacci_#in~n|) (< 0 fibonacci_~n)) [2020-08-22 18:33:44,645 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| 2) (<= 1 |fibonacci_#t~ret0|) .cse0 (<= 2 |fibonacci_#in~n|)) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 |fibonacci_#in~n|)))) [2020-08-22 18:33:44,646 INFO L264 CegarLoopResult]: At program point fibonacciEXIT(lines 14 22) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 0 |fibonacci_#res|) (or (and (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1)) (<= 2 |fibonacci_#in~n|)) (and (<= |fibonacci_#in~n| 1) (<= 1 |fibonacci_#res|)) (<= |fibonacci_#in~n| 0))) [2020-08-22 18:33:44,646 INFO L264 CegarLoopResult]: At program point L17(lines 17 21) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (< 0 fibonacci_~n)) [2020-08-22 18:33:44,646 INFO L264 CegarLoopResult]: At program point L20-3(line 20) the Hoare annotation is: (let ((.cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret1| |fibonacci_#t~ret0| 1))) (.cse1 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 1)) .cse0 .cse1 (< 1 fibonacci_~n)) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 fibonacci_~n) .cse1))) [2020-08-22 18:33:44,646 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= |fibonacci_#in~n| 0)) [2020-08-22 18:33:44,646 INFO L264 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (let ((.cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret1| |fibonacci_#t~ret0| 1))) (.cse1 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 1)) .cse0 .cse1 (< 1 fibonacci_~n)) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 fibonacci_~n) .cse1))) [2020-08-22 18:33:44,647 INFO L264 CegarLoopResult]: At program point L15(lines 15 21) the Hoare annotation is: (= fibonacci_~n |fibonacci_#in~n|) [2020-08-22 18:33:44,647 INFO L264 CegarLoopResult]: At program point L20-5(line 20) the Hoare annotation is: (let ((.cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret1| |fibonacci_#t~ret0| 1))) (.cse1 (= fibonacci_~n |fibonacci_#in~n|)) (.cse2 (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1)))) (or (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 fibonacci_~n) .cse1 .cse2) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 1)) .cse0 .cse1 .cse2 (<= 2 |fibonacci_#in~n|)))) [2020-08-22 18:33:44,647 INFO L264 CegarLoopResult]: At program point L20-6(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|)) (.cse1 (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1)))) (or (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 1)) .cse0 .cse1 (< 1 fibonacci_~n)) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) (<= 3 fibonacci_~n) .cse0 .cse1))) [2020-08-22 18:33:44,647 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 18:33:44,647 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 18:33:44,647 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 18:33:44,647 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 18:33:44,648 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 18:33:44,649 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 18:33:44,649 INFO L271 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-08-22 18:33:44,649 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) the Hoare annotation is: false [2020-08-22 18:33:44,649 INFO L264 CegarLoopResult]: At program point L31(lines 31 35) the Hoare annotation is: (<= main_~x~0 (+ main_~result~0 1)) [2020-08-22 18:33:44,650 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-08-22 18:33:44,650 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-08-22 18:33:44,650 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (<= main_~x~0 (+ |main_#t~ret3| 1)) [2020-08-22 18:33:44,650 INFO L271 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-08-22 18:33:44,650 INFO L264 CegarLoopResult]: At program point L30-2(line 30) the Hoare annotation is: (<= main_~x~0 (+ |main_#t~ret3| 1)) [2020-08-22 18:33:44,651 INFO L271 CegarLoopResult]: At program point L27(lines 27 29) the Hoare annotation is: true [2020-08-22 18:33:44,651 INFO L264 CegarLoopResult]: At program point L30-3(line 30) the Hoare annotation is: (and (<= main_~x~0 (+ main_~result~0 1)) (<= main_~x~0 (+ |main_#t~ret3| 1))) [2020-08-22 18:33:44,651 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-08-22 18:33:44,651 INFO L271 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: true [2020-08-22 18:33:44,651 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 25 36) the Hoare annotation is: true [2020-08-22 18:33:44,651 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 25 36) the Hoare annotation is: true [2020-08-22 18:33:44,651 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: false [2020-08-22 18:33:44,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:33:44 BoogieIcfgContainer [2020-08-22 18:33:44,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:33:44,675 INFO L168 Benchmark]: Toolchain (without parser) took 7031.14 ms. Allocated memory was 146.8 MB in the beginning and 283.6 MB in the end (delta: 136.8 MB). Free memory was 104.1 MB in the beginning and 186.7 MB in the end (delta: -82.6 MB). Peak memory consumption was 137.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:44,676 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 18:33:44,677 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.93 ms. Allocated memory is still 146.8 MB. Free memory was 103.7 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:44,680 INFO L168 Benchmark]: Boogie Preprocessor took 142.65 ms. Allocated memory was 146.8 MB in the beginning and 206.6 MB in the end (delta: 59.8 MB). Free memory was 94.3 MB in the beginning and 185.6 MB in the end (delta: -91.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:44,683 INFO L168 Benchmark]: RCFGBuilder took 261.18 ms. Allocated memory is still 206.6 MB. Free memory was 185.2 MB in the beginning and 171.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:44,685 INFO L168 Benchmark]: TraceAbstraction took 6377.59 ms. Allocated memory was 206.6 MB in the beginning and 283.6 MB in the end (delta: 77.1 MB). Free memory was 171.7 MB in the beginning and 186.7 MB in the end (delta: -15.1 MB). Peak memory consumption was 145.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:44,693 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.93 ms. Allocated memory is still 146.8 MB. Free memory was 103.7 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.65 ms. Allocated memory was 146.8 MB in the beginning and 206.6 MB in the end (delta: 59.8 MB). Free memory was 94.3 MB in the beginning and 185.6 MB in the end (delta: -91.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.18 ms. Allocated memory is still 206.6 MB. Free memory was 185.2 MB in the beginning and 171.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6377.59 ms. Allocated memory was 206.6 MB in the beginning and 283.6 MB in the end (delta: 77.1 MB). Free memory was 171.7 MB in the beginning and 186.7 MB in the end (delta: -15.1 MB). Peak memory consumption was 145.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 14]: Procedure Contract for fibonacci Derived contract for procedure fibonacci: (n == \old(n) && 0 <= \result) && (((\old(n) <= \result + 1 && 2 <= \old(n)) || (\old(n) <= 1 && 1 <= \result)) || \old(n) <= 0) - ProcedureContractResult [Line: 25]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 10, TraceHistogramMax: 13, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 265 SDtfs, 344 SDslu, 999 SDs, 0 SdLazy, 962 SolverSat, 133 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 302 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=9, 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, 10 MinimizatonAttempts, 31 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 35 LocationsWithAnnotation, 371 PreInvPairs, 650 NumberOfFragments, 340 HoareAnnotationTreeSize, 371 FomulaSimplifications, 12697 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 35 FomulaSimplificationsInter, 3456 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...