/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:05:31,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:05:31,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:05:32,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:05:32,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:05:32,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:05:32,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:05:32,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:05:32,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:05:32,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:05:32,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:05:32,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:05:32,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:05:32,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:05:32,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:05:32,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:05:32,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:05:32,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:05:32,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:05:32,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:05:32,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:05:32,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:05:32,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:05:32,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:05:32,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:05:32,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:05:32,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:05:32,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:05:32,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:05:32,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:05:32,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:05:32,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:05:32,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:05:32,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:05:32,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:05:32,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:05:32,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:05:32,064 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:05:32,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:05:32,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:05:32,066 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:05:32,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:05:32,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:05:32,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:05:32,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:05:32,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:05:32,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:05:32,067 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:05:32,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:05:32,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:05:32,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:05:32,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:05:32,068 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:05:32,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:05:32,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:05:32,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:05:32,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:05:32,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:05:32,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:05:32,070 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:05:32,351 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:05:32,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:05:32,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:05:32,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:05:32,370 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:05:32,371 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2020-07-17 17:05:32,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0770318b/a8044191787049969ff245661463ff43/FLAG18bdce9c0 [2020-07-17 17:05:32,861 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:05:32,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c [2020-07-17 17:05:32,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0770318b/a8044191787049969ff245661463ff43/FLAG18bdce9c0 [2020-07-17 17:05:33,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0770318b/a8044191787049969ff245661463ff43 [2020-07-17 17:05:33,298 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:05:33,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:05:33,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:05:33,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:05:33,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:05:33,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:05:33" (1/1) ... [2020-07-17 17:05:33,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b51e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33, skipping insertion in model container [2020-07-17 17:05:33,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:05:33" (1/1) ... [2020-07-17 17:05:33,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:05:33,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:05:33,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:05:33,555 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:05:33,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:05:33,581 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:05:33,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33 WrapperNode [2020-07-17 17:05:33,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:05:33,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:05:33,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:05:33,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:05:33,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33" (1/1) ... [2020-07-17 17:05:33,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33" (1/1) ... [2020-07-17 17:05:33,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33" (1/1) ... [2020-07-17 17:05:33,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33" (1/1) ... [2020-07-17 17:05:33,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33" (1/1) ... [2020-07-17 17:05:33,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33" (1/1) ... [2020-07-17 17:05:33,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33" (1/1) ... [2020-07-17 17:05:33,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:05:33,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:05:33,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:05:33,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:05:33,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:05:33,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:05:33,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:05:33,757 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-17 17:05:33,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:05:33,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:05:33,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:05:33,758 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-17 17:05:33,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:05:33,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:05:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:05:33,950 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:05:33,951 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:05:33,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:05:33 BoogieIcfgContainer [2020-07-17 17:05:33,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:05:33,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:05:33,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:05:33,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:05:33,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:05:33" (1/3) ... [2020-07-17 17:05:33,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573b5d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:05:33, skipping insertion in model container [2020-07-17 17:05:33,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:33" (2/3) ... [2020-07-17 17:05:33,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573b5d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:05:33, skipping insertion in model container [2020-07-17 17:05:33,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:05:33" (3/3) ... [2020-07-17 17:05:33,963 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2020-07-17 17:05:33,974 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:05:33,981 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:05:33,997 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:05:34,038 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:05:34,039 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:05:34,039 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:05:34,039 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:05:34,039 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:05:34,052 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:05:34,053 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:05:34,053 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:05:34,088 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-17 17:05:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 17:05:34,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:34,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:34,101 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:34,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2064988448, now seen corresponding path program 1 times [2020-07-17 17:05:34,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:34,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533837499] [2020-07-17 17:05:34,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:05:34,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533837499] [2020-07-17 17:05:34,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:05:34,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:05:34,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027477891] [2020-07-17 17:05:34,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:05:34,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:34,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:05:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:05:34,340 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-17 17:05:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:34,459 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-07-17 17:05:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:05:34,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-17 17:05:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:34,472 INFO L225 Difference]: With dead ends: 48 [2020-07-17 17:05:34,473 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 17:05:34,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:05:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 17:05:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 17:05:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 17:05:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-17 17:05:34,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-07-17 17:05:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:34,523 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-17 17:05:34,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:05:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-17 17:05:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 17:05:34,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:34,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:34,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:05:34,527 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:34,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1678486471, now seen corresponding path program 1 times [2020-07-17 17:05:34,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:34,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692002206] [2020-07-17 17:05:34,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:05:34,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692002206] [2020-07-17 17:05:34,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:05:34,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:05:34,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488923183] [2020-07-17 17:05:34,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:05:34,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:34,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:05:34,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:05:34,620 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-07-17 17:05:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:34,690 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-07-17 17:05:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:05:34,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-17 17:05:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:34,693 INFO L225 Difference]: With dead ends: 38 [2020-07-17 17:05:34,693 INFO L226 Difference]: Without dead ends: 32 [2020-07-17 17:05:34,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:05:34,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-17 17:05:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-17 17:05:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 17:05:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-17 17:05:34,706 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2020-07-17 17:05:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:34,706 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-17 17:05:34,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:05:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-17 17:05:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 17:05:34,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:34,709 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] [2020-07-17 17:05:34,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:05:34,709 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:34,710 INFO L82 PathProgramCache]: Analyzing trace with hash 961212118, now seen corresponding path program 1 times [2020-07-17 17:05:34,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:34,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620598793] [2020-07-17 17:05:34,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 17:05:34,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620598793] [2020-07-17 17:05:34,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:34,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:05:34,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678575295] [2020-07-17 17:05:34,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:05:34,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:34,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:05:34,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:05:34,838 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-07-17 17:05:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:34,930 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-07-17 17:05:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:05:34,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-07-17 17:05:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:34,933 INFO L225 Difference]: With dead ends: 54 [2020-07-17 17:05:34,933 INFO L226 Difference]: Without dead ends: 32 [2020-07-17 17:05:34,934 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 [2020-07-17 17:05:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-17 17:05:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-07-17 17:05:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 17:05:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-17 17:05:34,946 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 35 [2020-07-17 17:05:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:34,947 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-17 17:05:34,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:05:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-17 17:05:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-17 17:05:34,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:34,950 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] [2020-07-17 17:05:34,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:05:34,950 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:34,951 INFO L82 PathProgramCache]: Analyzing trace with hash -125795935, now seen corresponding path program 1 times [2020-07-17 17:05:34,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:34,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472150476] [2020-07-17 17:05:34,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-17 17:05:35,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472150476] [2020-07-17 17:05:35,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:35,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:05:35,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921633341] [2020-07-17 17:05:35,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:05:35,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:35,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:05:35,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:05:35,127 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-07-17 17:05:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:35,254 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-07-17 17:05:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:05:35,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-07-17 17:05:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:35,258 INFO L225 Difference]: With dead ends: 58 [2020-07-17 17:05:35,258 INFO L226 Difference]: Without dead ends: 52 [2020-07-17 17:05:35,259 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 [2020-07-17 17:05:35,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-17 17:05:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-17 17:05:35,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-17 17:05:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-07-17 17:05:35,275 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 36 [2020-07-17 17:05:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:35,275 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-07-17 17:05:35,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:05:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-07-17 17:05:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-17 17:05:35,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:35,278 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] [2020-07-17 17:05:35,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:05:35,279 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:35,279 INFO L82 PathProgramCache]: Analyzing trace with hash 331377205, now seen corresponding path program 2 times [2020-07-17 17:05:35,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:35,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567182267] [2020-07-17 17:05:35,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-17 17:05:35,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567182267] [2020-07-17 17:05:35,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:35,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:05:35,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077695423] [2020-07-17 17:05:35,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:05:35,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:05:35,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:05:35,425 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 7 states. [2020-07-17 17:05:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:35,543 INFO L93 Difference]: Finished difference Result 110 states and 153 transitions. [2020-07-17 17:05:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:05:35,544 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-07-17 17:05:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:35,546 INFO L225 Difference]: With dead ends: 110 [2020-07-17 17:05:35,546 INFO L226 Difference]: Without dead ends: 66 [2020-07-17 17:05:35,548 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 [2020-07-17 17:05:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-17 17:05:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-07-17 17:05:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 17:05:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-07-17 17:05:35,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 53 [2020-07-17 17:05:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:35,564 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-07-17 17:05:35,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:05:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-07-17 17:05:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-17 17:05:35,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:35,567 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] [2020-07-17 17:05:35,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:05:35,568 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:35,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2068833840, now seen corresponding path program 3 times [2020-07-17 17:05:35,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:35,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719473842] [2020-07-17 17:05:35,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-17 17:05:35,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719473842] [2020-07-17 17:05:35,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:35,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:05:35,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010340915] [2020-07-17 17:05:35,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:05:35,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:35,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:05:35,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:05:35,732 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 7 states. [2020-07-17 17:05:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:35,840 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2020-07-17 17:05:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:05:35,841 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-07-17 17:05:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:35,843 INFO L225 Difference]: With dead ends: 88 [2020-07-17 17:05:35,843 INFO L226 Difference]: Without dead ends: 82 [2020-07-17 17:05:35,844 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 [2020-07-17 17:05:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-17 17:05:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2020-07-17 17:05:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-17 17:05:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2020-07-17 17:05:35,864 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 54 [2020-07-17 17:05:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:35,865 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2020-07-17 17:05:35,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:05:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2020-07-17 17:05:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-17 17:05:35,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:35,871 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] [2020-07-17 17:05:35,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:05:35,872 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:35,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1575340027, now seen corresponding path program 4 times [2020-07-17 17:05:35,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:35,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660817540] [2020-07-17 17:05:35,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 130 proven. 176 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-07-17 17:05:36,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660817540] [2020-07-17 17:05:36,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:36,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:05:36,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000762436] [2020-07-17 17:05:36,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:05:36,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:36,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:05:36,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:05:36,182 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand 10 states. [2020-07-17 17:05:36,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:36,441 INFO L93 Difference]: Finished difference Result 139 states and 201 transitions. [2020-07-17 17:05:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 17:05:36,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 125 [2020-07-17 17:05:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:36,445 INFO L225 Difference]: With dead ends: 139 [2020-07-17 17:05:36,445 INFO L226 Difference]: Without dead ends: 70 [2020-07-17 17:05:36,447 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 [2020-07-17 17:05:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-17 17:05:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2020-07-17 17:05:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-17 17:05:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-07-17 17:05:36,463 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 125 [2020-07-17 17:05:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:36,463 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-07-17 17:05:36,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:05:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-07-17 17:05:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-17 17:05:36,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:36,467 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] [2020-07-17 17:05:36,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:05:36,469 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:36,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1005193447, now seen corresponding path program 5 times [2020-07-17 17:05:36,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:36,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347908268] [2020-07-17 17:05:36,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 105 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-07-17 17:05:36,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347908268] [2020-07-17 17:05:36,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:36,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:05:36,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204116454] [2020-07-17 17:05:36,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:05:36,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:36,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:05:36,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:05:36,685 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 8 states. [2020-07-17 17:05:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:36,817 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-07-17 17:05:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:05:36,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-07-17 17:05:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:36,819 INFO L225 Difference]: With dead ends: 73 [2020-07-17 17:05:36,821 INFO L226 Difference]: Without dead ends: 67 [2020-07-17 17:05:36,822 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 [2020-07-17 17:05:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-17 17:05:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-17 17:05:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-17 17:05:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-07-17 17:05:36,834 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 89 [2020-07-17 17:05:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:36,835 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-07-17 17:05:36,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:05:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-07-17 17:05:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-17 17:05:36,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:36,838 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] [2020-07-17 17:05:36,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:05:36,839 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:36,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:36,839 INFO L82 PathProgramCache]: Analyzing trace with hash -750862549, now seen corresponding path program 6 times [2020-07-17 17:05:36,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:36,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422302076] [2020-07-17 17:05:36,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 465 proven. 132 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2020-07-17 17:05:37,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422302076] [2020-07-17 17:05:37,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:37,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:05:37,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370610828] [2020-07-17 17:05:37,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:05:37,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:37,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:05:37,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:05:37,267 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-07-17 17:05:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:37,526 INFO L93 Difference]: Finished difference Result 143 states and 194 transitions. [2020-07-17 17:05:37,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 17:05:37,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 195 [2020-07-17 17:05:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:37,528 INFO L225 Difference]: With dead ends: 143 [2020-07-17 17:05:37,528 INFO L226 Difference]: Without dead ends: 70 [2020-07-17 17:05:37,530 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 [2020-07-17 17:05:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-17 17:05:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-17 17:05:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-17 17:05:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-07-17 17:05:37,553 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 195 [2020-07-17 17:05:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:37,554 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-07-17 17:05:37,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:05:37,554 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-07-17 17:05:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-17 17:05:37,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:37,557 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] [2020-07-17 17:05:37,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:05:37,557 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:37,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:37,558 INFO L82 PathProgramCache]: Analyzing trace with hash -311463261, now seen corresponding path program 7 times [2020-07-17 17:05:37,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:37,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679073169] [2020-07-17 17:05:37,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:05:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:05:37,678 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:05:37,678 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:05:37,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:05:37,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:05:37 BoogieIcfgContainer [2020-07-17 17:05:37,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:05:37,751 INFO L168 Benchmark]: Toolchain (without parser) took 4450.51 ms. Allocated memory was 139.5 MB in the beginning and 281.5 MB in the end (delta: 142.1 MB). Free memory was 102.8 MB in the beginning and 247.8 MB in the end (delta: -144.9 MB). Peak memory consumption was 146.5 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:37,752 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 17:05:37,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.97 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 93.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:37,754 INFO L168 Benchmark]: Boogie Preprocessor took 115.87 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 93.1 MB in the beginning and 182.8 MB in the end (delta: -89.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:37,754 INFO L168 Benchmark]: RCFGBuilder took 256.84 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 170.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:37,755 INFO L168 Benchmark]: TraceAbstraction took 3792.23 ms. Allocated memory was 203.9 MB in the beginning and 281.5 MB in the end (delta: 77.6 MB). Free memory was 169.6 MB in the beginning and 247.8 MB in the end (delta: -78.1 MB). Peak memory consumption was 148.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:37,759 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.97 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 93.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.87 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 93.1 MB in the beginning and 182.8 MB in the end (delta: -89.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 256.84 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 170.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3792.23 ms. Allocated memory was 203.9 MB in the beginning and 281.5 MB in the end (delta: 77.6 MB). Free memory was 169.6 MB in the beginning and 247.8 MB in the end (delta: -78.1 MB). Peak memory consumption was 148.8 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(); VAL [__VERIFIER_nondet_int()=5, x=5] [L29] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L17] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=2, \result=1, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=3, \result=2, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=2, \result=1, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L22] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=4, \result=3, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=2, \result=1, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=3, \result=2, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L22] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=5, \result=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L29] RET, EXPR fibonacci(x) VAL [fibonacci(x)=5, x=5] [L29] int result = fibonacci(x); VAL [fibonacci(x)=5, result=5, x=5] [L30] COND FALSE !(x != 5 || result == 3) VAL [result=5, x=5] [L33] __VERIFIER_error() VAL [result=5, x=5] - 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, 625 SolverSat, 130 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 766 NumberOfCodeBlocks, 766 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 615 ConstructedInterpolants, 0 QuantifiedInterpolants, 121037 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 1685/2143 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...