/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-simple/fibo_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:07:42,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:07:42,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:07:42,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:07:42,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:07:42,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:07:42,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:07:42,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:07:42,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:07:42,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:07:42,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:07:42,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:07:42,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:07:42,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:07:42,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:07:42,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:07:42,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:07:42,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:07:42,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:07:42,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:07:42,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:07:42,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:07:42,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:07:42,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:07:42,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:07:42,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:07:42,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:07:42,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:07:42,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:07:42,410 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:07:42,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:07:42,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:07:42,411 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:07:42,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:07:42,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:07:42,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:07:42,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:07:42,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:07:42,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:07:42,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:07:42,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:07:42,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:07:42,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:07:42,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:07:42,418 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:07:42,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:07:42,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:07:42,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:07:42,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:07:42,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:07:42,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:07:42,419 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:07:42,734 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:07:42,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:07:42,749 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:07:42,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:07:42,750 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:07:42,751 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-07-07 13:07:42,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2867e7ec8/fda4e0173d4745f5b0ab9ebc04083916/FLAGcc89b542d [2020-07-07 13:07:43,253 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:07:43,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-07-07 13:07:43,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2867e7ec8/fda4e0173d4745f5b0ab9ebc04083916/FLAGcc89b542d [2020-07-07 13:07:43,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2867e7ec8/fda4e0173d4745f5b0ab9ebc04083916 [2020-07-07 13:07:43,678 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:07:43,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:07:43,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:07:43,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:07:43,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:07:43,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:07:43" (1/1) ... [2020-07-07 13:07:43,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab1d360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43, skipping insertion in model container [2020-07-07 13:07:43,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:07:43" (1/1) ... [2020-07-07 13:07:43,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:07:43,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:07:43,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:07:43,892 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:07:43,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:07:43,930 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:07:43,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43 WrapperNode [2020-07-07 13:07:43,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:07:43,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:07:43,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:07:43,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:07:43,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43" (1/1) ... [2020-07-07 13:07:43,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43" (1/1) ... [2020-07-07 13:07:43,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43" (1/1) ... [2020-07-07 13:07:43,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43" (1/1) ... [2020-07-07 13:07:43,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43" (1/1) ... [2020-07-07 13:07:43,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43" (1/1) ... [2020-07-07 13:07:43,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43" (1/1) ... [2020-07-07 13:07:43,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:07:43,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:07:43,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:07:43,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:07:43,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43" (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 [2020-07-07 13:07:44,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:07:44,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:07:44,130 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-07 13:07:44,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:07:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:07:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:07:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-07 13:07:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:07:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:07:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:07:44,360 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:07:44,360 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:07:44,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:07:44 BoogieIcfgContainer [2020-07-07 13:07:44,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:07:44,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:07:44,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:07:44,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:07:44,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:07:43" (1/3) ... [2020-07-07 13:07:44,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1014e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:07:44, skipping insertion in model container [2020-07-07 13:07:44,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:07:43" (2/3) ... [2020-07-07 13:07:44,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1014e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:07:44, skipping insertion in model container [2020-07-07 13:07:44,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:07:44" (3/3) ... [2020-07-07 13:07:44,373 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2020-07-07 13:07:44,385 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:07:44,392 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:07:44,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:07:44,434 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:07:44,435 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:07:44,435 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:07:44,435 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:07:44,436 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:07:44,436 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:07:44,436 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:07:44,437 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:07:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-07-07 13:07:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:07:44,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:44,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:07:44,477 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:44,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:44,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-07-07 13:07:44,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:44,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717622708] [2020-07-07 13:07:44,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:07:44,754 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:44,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717622708] [2020-07-07 13:07:44,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:44,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:07:44,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112418197] [2020-07-07 13:07:44,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:07:44,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:07:44,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:07:44,780 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-07-07 13:07:44,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:44,901 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-07-07 13:07:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:07:44,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 13:07:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:44,915 INFO L225 Difference]: With dead ends: 44 [2020-07-07 13:07:44,915 INFO L226 Difference]: Without dead ends: 28 [2020-07-07 13:07:44,919 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 [2020-07-07 13:07:44,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-07 13:07:44,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-07 13:07:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 13:07:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-07 13:07:44,979 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-07-07 13:07:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:44,980 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-07 13:07:44,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:07:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-07 13:07:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 13:07:44,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:44,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:07:44,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:07:44,983 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-07-07 13:07:44,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:44,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223884717] [2020-07-07 13:07:44,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:07:45,101 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:45,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223884717] [2020-07-07 13:07:45,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:45,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:07:45,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097945170] [2020-07-07 13:07:45,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:07:45,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:45,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:07:45,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:07:45,107 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-07-07 13:07:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:45,191 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-07 13:07:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:07:45,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-07 13:07:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:45,193 INFO L225 Difference]: With dead ends: 36 [2020-07-07 13:07:45,194 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 13:07:45,195 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 [2020-07-07 13:07:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 13:07:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-07 13:07:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 13:07:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-07 13:07:45,207 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-07-07 13:07:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:45,208 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-07 13:07:45,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:07:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-07 13:07:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:07:45,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:45,210 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] [2020-07-07 13:07:45,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:07:45,211 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-07-07 13:07:45,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:45,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112594472] [2020-07-07 13:07:45,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 13:07:45,358 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:45,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112594472] [2020-07-07 13:07:45,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:45,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:07:45,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285289029] [2020-07-07 13:07:45,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:07:45,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:45,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:07:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:07:45,360 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-07-07 13:07:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:45,469 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-07-07 13:07:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:07:45,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-07-07 13:07:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:45,472 INFO L225 Difference]: With dead ends: 52 [2020-07-07 13:07:45,472 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 13:07:45,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:07:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 13:07:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 13:07:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 13:07:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-07 13:07:45,485 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 33 [2020-07-07 13:07:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:45,486 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-07 13:07:45,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:07:45,486 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-07 13:07:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 13:07:45,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:45,488 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] [2020-07-07 13:07:45,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:07:45,489 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash -643371531, now seen corresponding path program 1 times [2020-07-07 13:07:45,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:45,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94211790] [2020-07-07 13:07:45,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 13:07:45,612 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:45,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94211790] [2020-07-07 13:07:45,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:45,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:07:45,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342485231] [2020-07-07 13:07:45,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:07:45,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:45,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:07:45,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:07:45,621 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-07-07 13:07:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:45,755 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-07-07 13:07:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:07:45,756 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-07-07 13:07:45,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:45,759 INFO L225 Difference]: With dead ends: 56 [2020-07-07 13:07:45,759 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 13:07:45,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:07:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 13:07:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-07 13:07:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-07 13:07:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-07-07 13:07:45,776 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2020-07-07 13:07:45,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:45,777 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-07-07 13:07:45,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:07:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-07-07 13:07:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 13:07:45,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:45,780 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] [2020-07-07 13:07:45,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:07:45,780 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:45,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:45,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1274787059, now seen corresponding path program 2 times [2020-07-07 13:07:45,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:45,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224121156] [2020-07-07 13:07:45,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 13:07:45,953 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:45,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224121156] [2020-07-07 13:07:45,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:45,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:07:45,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745295435] [2020-07-07 13:07:45,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:07:45,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:07:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:07:45,955 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 9 states. [2020-07-07 13:07:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:46,106 INFO L93 Difference]: Finished difference Result 111 states and 156 transitions. [2020-07-07 13:07:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 13:07:46,107 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-07-07 13:07:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:46,110 INFO L225 Difference]: With dead ends: 111 [2020-07-07 13:07:46,110 INFO L226 Difference]: Without dead ends: 67 [2020-07-07 13:07:46,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:07:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-07 13:07:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-07-07 13:07:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-07 13:07:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-07-07 13:07:46,126 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51 [2020-07-07 13:07:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:46,127 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-07-07 13:07:46,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 13:07:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-07-07 13:07:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-07 13:07:46,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:46,130 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] [2020-07-07 13:07:46,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:07:46,130 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:46,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:46,131 INFO L82 PathProgramCache]: Analyzing trace with hash 99184320, now seen corresponding path program 3 times [2020-07-07 13:07:46,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:46,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746246330] [2020-07-07 13:07:46,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 13:07:46,270 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:46,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746246330] [2020-07-07 13:07:46,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:46,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:07:46,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609567744] [2020-07-07 13:07:46,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:07:46,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:46,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:07:46,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:07:46,273 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 9 states. [2020-07-07 13:07:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:46,408 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2020-07-07 13:07:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:07:46,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-07-07 13:07:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:46,412 INFO L225 Difference]: With dead ends: 89 [2020-07-07 13:07:46,412 INFO L226 Difference]: Without dead ends: 83 [2020-07-07 13:07:46,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:07:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-07 13:07:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2020-07-07 13:07:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-07 13:07:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2020-07-07 13:07:46,433 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 52 [2020-07-07 13:07:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:46,433 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2020-07-07 13:07:46,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 13:07:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2020-07-07 13:07:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-07 13:07:46,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:46,438 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] [2020-07-07 13:07:46,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:07:46,438 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:46,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1883941443, now seen corresponding path program 4 times [2020-07-07 13:07:46,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:46,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923758913] [2020-07-07 13:07:46,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:07:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 17 proven. 70 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-07-07 13:07:46,861 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:46,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923758913] [2020-07-07 13:07:46,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:46,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 13:07:46,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658701417] [2020-07-07 13:07:46,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 13:07:46,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:46,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 13:07:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-07-07 13:07:46,865 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand 15 states. [2020-07-07 13:07:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:47,173 INFO L93 Difference]: Finished difference Result 142 states and 213 transitions. [2020-07-07 13:07:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 13:07:47,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 123 [2020-07-07 13:07:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:47,177 INFO L225 Difference]: With dead ends: 142 [2020-07-07 13:07:47,177 INFO L226 Difference]: Without dead ends: 73 [2020-07-07 13:07:47,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-07-07 13:07:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-07 13:07:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-07-07 13:07:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-07 13:07:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2020-07-07 13:07:47,195 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 123 [2020-07-07 13:07:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:47,195 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2020-07-07 13:07:47,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 13:07:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2020-07-07 13:07:47,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-07-07 13:07:47,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:47,198 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] [2020-07-07 13:07:47,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:07:47,199 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:47,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:47,200 INFO L82 PathProgramCache]: Analyzing trace with hash 532445701, now seen corresponding path program 5 times [2020-07-07 13:07:47,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:47,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530345075] [2020-07-07 13:07:47,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 17 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 17 to 31 Garbage collection #2: 31 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 31 to 61 Garbage collection #3: 61 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 61 to 113 Garbage collection #4: 113 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 113 to 223 [2020-07-07 13:07:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:07:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 47 proven. 92 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-07-07 13:07:48,028 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:48,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530345075] [2020-07-07 13:07:48,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:07:48,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-07 13:07:48,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716204024] [2020-07-07 13:07:48,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 13:07:48,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:07:48,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 13:07:48,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-07-07 13:07:48,036 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand 18 states. [2020-07-07 13:07:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:48,447 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2020-07-07 13:07:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 13:07:48,447 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 193 [2020-07-07 13:07:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:48,450 INFO L225 Difference]: With dead ends: 149 [2020-07-07 13:07:48,451 INFO L226 Difference]: Without dead ends: 92 [2020-07-07 13:07:48,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-07-07 13:07:48,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-07 13:07:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-07-07 13:07:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-07 13:07:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2020-07-07 13:07:48,470 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 193 [2020-07-07 13:07:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:07:48,471 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-07-07 13:07:48,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 13:07:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2020-07-07 13:07:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-07 13:07:48,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:07:48,474 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] [2020-07-07 13:07:48,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:07:48,474 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:07:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:07:48,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1618484333, now seen corresponding path program 6 times [2020-07-07 13:07:48,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:07:48,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936751070] [2020-07-07 13:07:48,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 17 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 17 to 31 Garbage collection #2: 31 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 31 to 61 Garbage collection #3: 61 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 61 to 113 Garbage collection #4: 113 nodes / 0 free / 0.001s / 0.001s total Resizing node table from 113 to 223 [2020-07-07 13:07:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:07:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:07:48,569 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:07:48,570 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:07:48,570 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:07:48,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:07:48,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:07:48 BoogieIcfgContainer [2020-07-07 13:07:48,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:07:48,602 INFO L168 Benchmark]: Toolchain (without parser) took 4921.96 ms. Allocated memory was 145.2 MB in the beginning and 284.7 MB in the end (delta: 139.5 MB). Free memory was 103.2 MB in the beginning and 250.7 MB in the end (delta: -147.5 MB). Peak memory consumption was 146.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:48,603 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 145.2 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:07:48,604 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.58 ms. Allocated memory is still 145.2 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:48,605 INFO L168 Benchmark]: Boogie Preprocessor took 30.67 ms. Allocated memory is still 145.2 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:48,606 INFO L168 Benchmark]: RCFGBuilder took 401.98 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.1 MB in the beginning and 169.7 MB in the end (delta: -77.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:48,607 INFO L168 Benchmark]: TraceAbstraction took 4233.77 ms. Allocated memory was 202.4 MB in the beginning and 284.7 MB in the end (delta: 82.3 MB). Free memory was 169.7 MB in the beginning and 250.7 MB in the end (delta: -80.9 MB). Peak memory consumption was 156.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:07:48,610 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 145.2 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.58 ms. Allocated memory is still 145.2 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.67 ms. Allocated memory is still 145.2 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 401.98 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.1 MB in the beginning and 169.7 MB in the end (delta: -77.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4233.77 ms. Allocated memory was 202.4 MB in the beginning and 284.7 MB in the end (delta: 82.3 MB). Free memory was 169.7 MB in the beginning and 250.7 MB in the end (delta: -80.9 MB). Peak memory consumption was 156.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; [L25] CALL, EXPR fibo(x) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND TRUE n == 1 [L9] return 1; [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND TRUE n < 1 [L7] return 0; [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND FALSE !(n < 1) [L8] COND TRUE n == 1 [L9] return 1; [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND TRUE n == 1 [L9] return 1; [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND TRUE n < 1 [L7] return 0; [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND FALSE !(n == 1) [L11] CALL, EXPR fibo(n-1) [L6] COND FALSE !(n < 1) [L8] COND TRUE n == 1 [L9] return 1; [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND TRUE n < 1 [L7] return 0; [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) [L11] CALL, EXPR fibo(n-2) [L6] COND FALSE !(n < 1) [L8] COND TRUE n == 1 [L9] return 1; [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) [L25] int result = fibo(x); [L26] COND TRUE result == 5 [L27] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 9, TraceHistogramMax: 21, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 231 SDtfs, 452 SDslu, 774 SDs, 0 SdLazy, 743 SolverSat, 241 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 225 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=8, 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, 8 MinimizatonAttempts, 36 StatesRemovedByMinimization, 5 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...