/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/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:33:40,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:33:40,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:33:40,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 18:33:40,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:33:40,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:33:40,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:33:40,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:33:40,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:33:40,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:33:40,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:33:40,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:33:40,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:33:40,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:33:40,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:33:40,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:33:40,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:33:40,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:33:40,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:33:40,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:33:40,517 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 18:33:40,526 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:33:40,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:33:40,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:33:40,527 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:33:40,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:33:40,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:33:40,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:33:40,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:33:40,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:33:40,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:33:40,529 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:33:40,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:33:40,529 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:33:40,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:33:40,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:33:40,530 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:33:40,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:33:40,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:33:40,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:33:40,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:33:40,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:33:40,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:33:40,531 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:33:40,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:33:40,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:33:40,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:33:40,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:33:40,827 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:33:40,828 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2020-08-22 18:33:40,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/690aa421c/11ccba9ac2bf4b869f42588f752a2d77/FLAGc3dcd6475 [2020-08-22 18:33:41,277 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:33:41,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c [2020-08-22 18:33:41,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/690aa421c/11ccba9ac2bf4b869f42588f752a2d77/FLAGc3dcd6475 [2020-08-22 18:33:41,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/690aa421c/11ccba9ac2bf4b869f42588f752a2d77 [2020-08-22 18:33:41,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:33:41,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:33:41,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:41,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:33:41,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:33:41,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:41" (1/1) ... [2020-08-22 18:33:41,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78319364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:41, skipping insertion in model container [2020-08-22 18:33:41,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:41" (1/1) ... [2020-08-22 18:33:41,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:33:41,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:33:41,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:41,975 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:33:41,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:42,003 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:33:42,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:42 WrapperNode [2020-08-22 18:33:42,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:42,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:33:42,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:33:42,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:33:42,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:42" (1/1) ... [2020-08-22 18:33:42,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:42" (1/1) ... [2020-08-22 18:33:42,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:42" (1/1) ... [2020-08-22 18:33:42,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:42" (1/1) ... [2020-08-22 18:33:42,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:42" (1/1) ... [2020-08-22 18:33:42,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:42" (1/1) ... [2020-08-22 18:33:42,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:42" (1/1) ... [2020-08-22 18:33:42,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:33:42,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:33:42,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:33:42,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:33:42,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:42" (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 18:33:42,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:33:42,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:33:42,183 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-08-22 18:33:42,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:33:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:33:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:33:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-08-22 18:33:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:33:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:33:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:33:42,486 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:33:42,486 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:33:42,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:42 BoogieIcfgContainer [2020-08-22 18:33:42,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:33:42,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:33:42,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:33:42,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:33:42,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:33:41" (1/3) ... [2020-08-22 18:33:42,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d73c76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:42, skipping insertion in model container [2020-08-22 18:33:42,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:42" (2/3) ... [2020-08-22 18:33:42,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d73c76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:42, skipping insertion in model container [2020-08-22 18:33:42,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:42" (3/3) ... [2020-08-22 18:33:42,499 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2020-08-22 18:33:42,510 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:33:42,517 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:33:42,531 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:33:42,553 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:33:42,554 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:33:42,554 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:33:42,554 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:33:42,554 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:33:42,554 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:33:42,555 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:33:42,555 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:33:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 18:33:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 18:33:42,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:42,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:42,582 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:42,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:42,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2064988448, now seen corresponding path program 1 times [2020-08-22 18:33:42,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:42,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750099621] [2020-08-22 18:33:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:42,666 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:33:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,821 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 18:33:42,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750099621] [2020-08-22 18:33:42,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:42,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:33:42,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433561066] [2020-08-22 18:33:42,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:33:42,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:42,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:33:42,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:42,848 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-22 18:33:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:42,982 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-08-22 18:33:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:33:42,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 18:33:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:42,994 INFO L225 Difference]: With dead ends: 48 [2020-08-22 18:33:42,995 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 18:33:42,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 18:33:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 18:33:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 18:33:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-22 18:33:43,048 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-08-22 18:33:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:43,048 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-22 18:33:43,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:33:43,049 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-22 18:33:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 18:33:43,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:43,051 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 18:33:43,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:33:43,052 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:43,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:43,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1678486471, now seen corresponding path program 1 times [2020-08-22 18:33:43,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:43,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441521863] [2020-08-22 18:33:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:43,056 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:33:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,126 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 18:33:43,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441521863] [2020-08-22 18:33:43,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:43,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:33:43,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368045739] [2020-08-22 18:33:43,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:33:43,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:43,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:33:43,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:43,130 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-22 18:33:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:43,208 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-08-22 18:33:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:33:43,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-22 18:33:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:43,211 INFO L225 Difference]: With dead ends: 38 [2020-08-22 18:33:43,211 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 18:33:43,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 18:33:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 18:33:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 18:33:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-22 18:33:43,225 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2020-08-22 18:33:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:43,225 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-22 18:33:43,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:33:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-22 18:33:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 18:33:43,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:43,228 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] [2020-08-22 18:33:43,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:33:43,228 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash 961212118, now seen corresponding path program 1 times [2020-08-22 18:33:43,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:43,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934127622] [2020-08-22 18:33:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:43,232 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:33:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 18:33:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,373 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 18:33:43,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934127622] [2020-08-22 18:33:43,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:43,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:43,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290160107] [2020-08-22 18:33:43,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:43,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:43,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:43,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:43,377 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-08-22 18:33:43,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:43,472 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-08-22 18:33:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:33:43,473 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-08-22 18:33:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:43,474 INFO L225 Difference]: With dead ends: 54 [2020-08-22 18:33:43,474 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 18:33:43,476 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 18:33:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 18:33:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-08-22 18:33:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 18:33:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-08-22 18:33:43,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 35 [2020-08-22 18:33:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:43,497 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-08-22 18:33:43,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-08-22 18:33:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 18:33:43,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:43,505 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] [2020-08-22 18:33:43,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:33:43,505 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:43,507 INFO L82 PathProgramCache]: Analyzing trace with hash -125795935, now seen corresponding path program 1 times [2020-08-22 18:33:43,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:43,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383006672] [2020-08-22 18:33:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:43,513 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:33:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,662 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 18:33:43,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383006672] [2020-08-22 18:33:43,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:43,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:43,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638513109] [2020-08-22 18:33:43,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:43,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:43,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:43,676 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-08-22 18:33:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:43,791 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-08-22 18:33:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:33:43,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-08-22 18:33:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:43,794 INFO L225 Difference]: With dead ends: 58 [2020-08-22 18:33:43,794 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 18:33:43,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 18:33:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 18:33:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 18:33:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-08-22 18:33:43,815 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 36 [2020-08-22 18:33:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:43,816 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-08-22 18:33:43,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-08-22 18:33:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 18:33:43,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:43,819 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] [2020-08-22 18:33:43,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:33:43,819 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:43,820 INFO L82 PathProgramCache]: Analyzing trace with hash 331377205, now seen corresponding path program 2 times [2020-08-22 18:33:43,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:43,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714219130] [2020-08-22 18:33:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:43,823 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:33:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:43,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,015 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 18:33:44,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714219130] [2020-08-22 18:33:44,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:44,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:33:44,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840641259] [2020-08-22 18:33:44,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:33:44,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:44,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:33:44,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:44,018 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 7 states. [2020-08-22 18:33:44,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:44,138 INFO L93 Difference]: Finished difference Result 110 states and 153 transitions. [2020-08-22 18:33:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:33:44,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-08-22 18:33:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:44,142 INFO L225 Difference]: With dead ends: 110 [2020-08-22 18:33:44,142 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 18:33:44,144 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 18:33:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 18:33:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-08-22 18:33:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 18:33:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-08-22 18:33:44,160 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 53 [2020-08-22 18:33:44,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:44,160 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-08-22 18:33:44,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:33:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-08-22 18:33:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 18:33:44,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:44,165 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] [2020-08-22 18:33:44,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 18:33:44,165 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:44,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2068833840, now seen corresponding path program 3 times [2020-08-22 18:33:44,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:44,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564489274] [2020-08-22 18:33:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:44,168 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:33:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,288 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 18:33:44,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564489274] [2020-08-22 18:33:44,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:44,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:33:44,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999130780] [2020-08-22 18:33:44,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:33:44,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:44,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:33:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:44,291 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 7 states. [2020-08-22 18:33:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:44,406 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2020-08-22 18:33:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 18:33:44,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-08-22 18:33:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:44,410 INFO L225 Difference]: With dead ends: 88 [2020-08-22 18:33:44,410 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 18:33:44,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 18:33:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2020-08-22 18:33:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 18:33:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2020-08-22 18:33:44,431 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 54 [2020-08-22 18:33:44,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:44,434 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2020-08-22 18:33:44,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:33:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2020-08-22 18:33:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-22 18:33:44,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:44,444 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] [2020-08-22 18:33:44,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 18:33:44,445 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1575340027, now seen corresponding path program 4 times [2020-08-22 18:33:44,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:44,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221681960] [2020-08-22 18:33:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:44,451 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:33:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:33:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:33:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,820 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 18:33:44,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221681960] [2020-08-22 18:33:44,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:44,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:44,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100387507] [2020-08-22 18:33:44,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:44,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:44,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:44,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:44,823 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand 10 states. [2020-08-22 18:33:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:45,111 INFO L93 Difference]: Finished difference Result 139 states and 201 transitions. [2020-08-22 18:33:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 18:33:45,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 125 [2020-08-22 18:33:45,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:45,114 INFO L225 Difference]: With dead ends: 139 [2020-08-22 18:33:45,114 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 18:33:45,117 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 18:33:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 18:33:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2020-08-22 18:33:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 18:33:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-08-22 18:33:45,129 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 125 [2020-08-22 18:33:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:45,130 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-08-22 18:33:45,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-08-22 18:33:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 18:33:45,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:45,132 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] [2020-08-22 18:33:45,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 18:33:45,132 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:45,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1005193447, now seen corresponding path program 5 times [2020-08-22 18:33:45,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:45,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133425537] [2020-08-22 18:33:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:45,135 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:33:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:33:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,283 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 18:33:45,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133425537] [2020-08-22 18:33:45,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:45,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:33:45,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521523621] [2020-08-22 18:33:45,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:33:45,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:33:45,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:45,286 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 8 states. [2020-08-22 18:33:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:45,410 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-08-22 18:33:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:33:45,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-08-22 18:33:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:45,412 INFO L225 Difference]: With dead ends: 73 [2020-08-22 18:33:45,412 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 18:33:45,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 18:33:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-08-22 18:33:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 18:33:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-22 18:33:45,424 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 89 [2020-08-22 18:33:45,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:45,425 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-22 18:33:45,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:33:45,425 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-22 18:33:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 18:33:45,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:45,427 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:45,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 18:33:45,428 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:45,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash -750862549, now seen corresponding path program 6 times [2020-08-22 18:33:45,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:45,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032107020] [2020-08-22 18:33:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:45,431 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 18:33:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:33:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:33:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:33:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:33:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:33:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:33:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:33:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 116 proven. 33 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-08-22 18:33:45,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032107020] [2020-08-22 18:33:45,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:45,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:45,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706672075] [2020-08-22 18:33:45,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:45,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:45,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:45,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:45,892 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-22 18:33:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:46,129 INFO L93 Difference]: Finished difference Result 143 states and 194 transitions. [2020-08-22 18:33:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 18:33:46,130 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 195 [2020-08-22 18:33:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:46,131 INFO L225 Difference]: With dead ends: 143 [2020-08-22 18:33:46,131 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 18:33:46,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 18:33:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-22 18:33:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 18:33:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-08-22 18:33:46,145 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 195 [2020-08-22 18:33:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:46,146 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-08-22 18:33:46,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-08-22 18:33:46,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-22 18:33:46,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:46,148 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:46,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 18:33:46,148 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:46,149 INFO L82 PathProgramCache]: Analyzing trace with hash -311463261, now seen corresponding path program 7 times [2020-08-22 18:33:46,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:46,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155046188] [2020-08-22 18:33:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:46,152 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:33:46,173 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:33:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:33:46,192 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:33:46,230 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 18:33:46,230 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 18:33:46,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 18:33:46,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:33:46 BoogieIcfgContainer [2020-08-22 18:33:46,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:33:46,257 INFO L168 Benchmark]: Toolchain (without parser) took 4550.16 ms. Allocated memory was 139.5 MB in the beginning and 285.2 MB in the end (delta: 145.8 MB). Free memory was 103.4 MB in the beginning and 256.7 MB in the end (delta: -153.2 MB). Peak memory consumption was 153.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:46,258 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 18:33:46,259 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.10 ms. Allocated memory is still 139.5 MB. Free memory was 103.2 MB in the beginning and 93.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:46,260 INFO L168 Benchmark]: Boogie Preprocessor took 104.87 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 180.9 MB in the end (delta: -87.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:46,260 INFO L168 Benchmark]: RCFGBuilder took 381.15 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 167.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:46,261 INFO L168 Benchmark]: TraceAbstraction took 3763.54 ms. Allocated memory was 201.9 MB in the beginning and 285.2 MB in the end (delta: 83.4 MB). Free memory was 167.8 MB in the beginning and 256.7 MB in the end (delta: -88.9 MB). Peak memory consumption was 155.0 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:46,264 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.10 ms. Allocated memory is still 139.5 MB. Free memory was 103.2 MB in the beginning and 93.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.87 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 180.9 MB in the end (delta: -87.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 381.15 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 167.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3763.54 ms. Allocated memory was 201.9 MB in the beginning and 285.2 MB in the end (delta: 83.4 MB). Free memory was 167.8 MB in the beginning and 256.7 MB in the end (delta: -88.9 MB). Peak memory consumption was 155.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int x = __VERIFIER_nondet_int(); [L29] CALL, EXPR fibonacci(x) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND TRUE n < 1 [L18] return 0; [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND FALSE !(n < 1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND TRUE n < 1 [L18] return 0; [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND TRUE n < 1 [L18] return 0; [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND FALSE !(n < 1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L29] RET, EXPR fibonacci(x) [L29] int result = fibonacci(x); [L30] COND FALSE !(x != 5 || result == 3) [L33] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.6s, OverallIterations: 10, TraceHistogramMax: 21, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 280 SDtfs, 278 SDslu, 742 SDs, 0 SdLazy, 615 SolverSat, 133 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 247 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred 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, 9 MinimizatonAttempts, 29 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 incorrect! Received shutdown request...