/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:15:26,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:15:26,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:15:26,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:15:26,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:15:26,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:15:26,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:15:26,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:15:26,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:15:26,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:15:26,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:15:26,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:15:26,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:15:26,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:15:26,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:15:26,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:15:26,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:15:26,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:15:26,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:15:26,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:15:26,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:15:26,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:15:26,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:15:26,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:15:26,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:15:26,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:15:26,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:15:26,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:15:26,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:15:26,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:15:26,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:15:26,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:15:26,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:15:26,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:15:26,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:15:26,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:15:26,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:15:26,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:15:26,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:15:26,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:15:26,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:15:26,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:15:26,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:15:26,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:15:26,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:15:26,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:15:26,173 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:15:26,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:15:26,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:15:26,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:15:26,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:15:26,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:15:26,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:15:26,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:15:26,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:15:26,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:15:26,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:15:26,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:15:26,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:15:26,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:15:26,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:15:26,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:15:26,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:15:26,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:15:26,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:15:26,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:15:26,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:15:26,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:15:26,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:15:26,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:15:26,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:15:26,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:15:26,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:15:26,516 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:15:26,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:15:26,522 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:15:26,522 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:15:26,523 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-08-18 16:15:26,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25da31d84/961e2b70b2824abb9585aaa97ad8660d/FLAG80bc63945 [2020-08-18 16:15:27,104 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:15:27,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-08-18 16:15:27,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25da31d84/961e2b70b2824abb9585aaa97ad8660d/FLAG80bc63945 [2020-08-18 16:15:27,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25da31d84/961e2b70b2824abb9585aaa97ad8660d [2020-08-18 16:15:27,509 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:15:27,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:15:27,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:15:27,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:15:27,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:15:27,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:15:27" (1/1) ... [2020-08-18 16:15:27,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e2873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27, skipping insertion in model container [2020-08-18 16:15:27,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:15:27" (1/1) ... [2020-08-18 16:15:27,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:15:27,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:15:27,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:15:27,727 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:15:27,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:15:27,756 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:15:27,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27 WrapperNode [2020-08-18 16:15:27,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:15:27,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:15:27,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:15:27,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:15:27,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27" (1/1) ... [2020-08-18 16:15:27,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27" (1/1) ... [2020-08-18 16:15:27,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27" (1/1) ... [2020-08-18 16:15:27,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27" (1/1) ... [2020-08-18 16:15:27,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27" (1/1) ... [2020-08-18 16:15:27,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27" (1/1) ... [2020-08-18 16:15:27,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27" (1/1) ... [2020-08-18 16:15:27,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:15:27,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:15:27,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:15:27,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:15:27,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:15:27,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:15:27,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:15:27,953 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-18 16:15:27,953 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-18 16:15:27,954 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:15:27,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:15:27,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:15:27,954 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-18 16:15:27,954 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-18 16:15:27,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:15:27,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:15:27,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:15:28,187 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:15:28,188 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 16:15:28,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:15:28 BoogieIcfgContainer [2020-08-18 16:15:28,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:15:28,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:15:28,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:15:28,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:15:28,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:15:27" (1/3) ... [2020-08-18 16:15:28,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d42dd37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:15:28, skipping insertion in model container [2020-08-18 16:15:28,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:15:27" (2/3) ... [2020-08-18 16:15:28,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d42dd37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:15:28, skipping insertion in model container [2020-08-18 16:15:28,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:15:28" (3/3) ... [2020-08-18 16:15:28,202 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-08-18 16:15:28,214 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:15:28,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:15:28,239 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:15:28,267 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:15:28,268 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:15:28,268 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:15:28,268 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:15:28,269 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:15:28,269 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:15:28,269 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:15:28,270 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:15:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 16:15:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 16:15:28,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:15:28,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:15:28,311 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:15:28,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:15:28,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-18 16:15:28,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:15:28,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093184384] [2020-08-18 16:15:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:15:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:28,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:15:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:28,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:15:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:15:28,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093184384] [2020-08-18 16:15:28,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:15:28,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:15:28,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429764074] [2020-08-18 16:15:28,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:15:28,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:15:28,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:15:28,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:15:28,598 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-18 16:15:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:15:28,710 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-18 16:15:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:15:28,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 16:15:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:15:28,725 INFO L225 Difference]: With dead ends: 44 [2020-08-18 16:15:28,726 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 16:15:28,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:15:28,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 16:15:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 16:15:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 16:15:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 16:15:28,775 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-18 16:15:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:15:28,776 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 16:15:28,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:15:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 16:15:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 16:15:28,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:15:28,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:15:28,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:15:28,779 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:15:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:15:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-18 16:15:28,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:15:28,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092877049] [2020-08-18 16:15:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:15:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:28,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:15:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:28,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:15:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:15:28,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092877049] [2020-08-18 16:15:28,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:15:28,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:15:28,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475977975] [2020-08-18 16:15:28,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:15:28,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:15:28,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:15:28,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:15:28,855 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-18 16:15:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:15:28,924 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-18 16:15:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:15:28,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 16:15:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:15:28,927 INFO L225 Difference]: With dead ends: 36 [2020-08-18 16:15:28,927 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 16:15:28,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:15:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 16:15:28,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 16:15:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 16:15:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 16:15:28,939 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-18 16:15:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:15:28,939 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 16:15:28,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:15:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 16:15:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:15:28,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:15:28,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:15:28,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:15:28,942 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:15:28,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:15:28,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-18 16:15:28,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:15:28,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128873999] [2020-08-18 16:15:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:15:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:28,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:15:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:15:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 16:15:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:15:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 16:15:29,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128873999] [2020-08-18 16:15:29,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:15:29,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 16:15:29,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225631478] [2020-08-18 16:15:29,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:15:29,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:15:29,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:15:29,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:15:29,083 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-18 16:15:29,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:15:29,174 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-18 16:15:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:15:29,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-18 16:15:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:15:29,177 INFO L225 Difference]: With dead ends: 58 [2020-08-18 16:15:29,177 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 16:15:29,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:15:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 16:15:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-18 16:15:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 16:15:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-18 16:15:29,188 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-18 16:15:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:15:29,189 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-18 16:15:29,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:15:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-18 16:15:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:15:29,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:15:29,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:15:29,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:15:29,192 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:15:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:15:29,193 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-18 16:15:29,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:15:29,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026448226] [2020-08-18 16:15:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:15:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:15:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:15:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 16:15:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 16:15:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 16:15:29,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026448226] [2020-08-18 16:15:29,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:15:29,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 16:15:29,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800767221] [2020-08-18 16:15:29,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:15:29,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:15:29,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:15:29,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:15:29,418 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-08-18 16:15:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:15:29,488 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-08-18 16:15:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 16:15:29,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-08-18 16:15:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:15:29,491 INFO L225 Difference]: With dead ends: 46 [2020-08-18 16:15:29,491 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 16:15:29,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:15:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 16:15:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-08-18 16:15:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 16:15:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-18 16:15:29,502 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2020-08-18 16:15:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:15:29,503 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-18 16:15:29,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:15:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-18 16:15:29,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 16:15:29,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:15:29,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:15:29,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:15:29,505 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:15:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:15:29,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-08-18 16:15:29,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:15:29,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339750284] [2020-08-18 16:15:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:15:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:15:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:15:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 16:15:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 16:15:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 16:15:29,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339750284] [2020-08-18 16:15:29,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:15:29,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 16:15:29,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547384778] [2020-08-18 16:15:29,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:15:29,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:15:29,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:15:29,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:15:29,658 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2020-08-18 16:15:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:15:29,807 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2020-08-18 16:15:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 16:15:29,808 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-08-18 16:15:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:15:29,809 INFO L225 Difference]: With dead ends: 71 [2020-08-18 16:15:29,810 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 16:15:29,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:15:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 16:15:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 16:15:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 16:15:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-08-18 16:15:29,830 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 28 [2020-08-18 16:15:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:15:29,833 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-08-18 16:15:29,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:15:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-08-18 16:15:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 16:15:29,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:15:29,838 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:15:29,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:15:29,840 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:15:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:15:29,840 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-18 16:15:29,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:15:29,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474822756] [2020-08-18 16:15:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:15:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:15:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:15:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 16:15:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 16:15:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:29,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:15:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:30,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 16:15:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 16:15:30,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474822756] [2020-08-18 16:15:30,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:15:30,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 16:15:30,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879654059] [2020-08-18 16:15:30,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:15:30,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:15:30,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:15:30,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:15:30,008 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 7 states. [2020-08-18 16:15:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:15:30,076 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2020-08-18 16:15:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:15:30,076 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-08-18 16:15:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:15:30,078 INFO L225 Difference]: With dead ends: 74 [2020-08-18 16:15:30,078 INFO L226 Difference]: Without dead ends: 41 [2020-08-18 16:15:30,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:15:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-18 16:15:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-18 16:15:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 16:15:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-08-18 16:15:30,087 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 39 [2020-08-18 16:15:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:15:30,088 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-08-18 16:15:30,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:15:30,088 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-08-18 16:15:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 16:15:30,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:15:30,090 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:15:30,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:15:30,091 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:15:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:15:30,091 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-18 16:15:30,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:15:30,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178746190] [2020-08-18 16:15:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:15:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:30,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:15:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:30,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:15:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:30,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 16:15:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:30,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 16:15:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:30,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 16:15:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:30,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 16:15:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:15:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 16:15:30,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178746190] [2020-08-18 16:15:30,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:15:30,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 16:15:30,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121143419] [2020-08-18 16:15:30,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:15:30,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:15:30,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:15:30,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:15:30,249 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 8 states. [2020-08-18 16:15:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:15:30,378 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-08-18 16:15:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 16:15:30,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 16:15:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:15:30,379 INFO L225 Difference]: With dead ends: 41 [2020-08-18 16:15:30,379 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 16:15:30,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:15:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 16:15:30,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 16:15:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 16:15:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 16:15:30,381 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2020-08-18 16:15:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:15:30,382 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 16:15:30,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:15:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 16:15:30,382 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 16:15:30,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:15:30,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 16:15:30,523 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 16:15:30,523 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:15:30,524 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:15:30,524 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 16:15:30,524 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 16:15:30,524 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:15:30,525 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-18 16:15:30,525 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-18 16:15:30,525 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-18 16:15:30,525 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-18 16:15:30,526 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-18 16:15:30,526 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-18 16:15:30,526 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= main_~x~0 2)) [2020-08-18 16:15:30,527 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-18 16:15:30,527 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-18 16:15:30,527 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-18 16:15:30,527 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-18 16:15:30,528 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 16:15:30,528 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-18 16:15:30,528 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-18 16:15:30,528 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-18 16:15:30,528 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-18 16:15:30,529 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-18 16:15:30,529 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-18 16:15:30,529 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-18 16:15:30,529 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-08-18 16:15:30,541 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-18 16:15:30,541 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= |fibo1_#t~ret0| 1) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse0))) [2020-08-18 16:15:30,542 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-18 16:15:30,542 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-18 16:15:30,542 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-18 16:15:30,542 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-18 16:15:30,542 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-18 16:15:30,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:15:30 BoogieIcfgContainer [2020-08-18 16:15:30,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:15:30,552 INFO L168 Benchmark]: Toolchain (without parser) took 3040.72 ms. Allocated memory was 147.3 MB in the beginning and 244.8 MB in the end (delta: 97.5 MB). Free memory was 102.8 MB in the beginning and 218.2 MB in the end (delta: -115.4 MB). Peak memory consumption was 106.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:15:30,553 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:15:30,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.42 ms. Allocated memory is still 147.3 MB. Free memory was 102.6 MB in the beginning and 92.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:15:30,555 INFO L168 Benchmark]: Boogie Preprocessor took 121.31 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 92.6 MB in the beginning and 181.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:15:30,556 INFO L168 Benchmark]: RCFGBuilder took 313.84 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 168.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:15:30,556 INFO L168 Benchmark]: TraceAbstraction took 2354.90 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 168.1 MB in the beginning and 218.2 MB in the end (delta: -50.1 MB). Peak memory consumption was 115.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:15:30,562 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.42 ms. Allocated memory is still 147.3 MB. Free memory was 102.6 MB in the beginning and 92.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.31 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 92.6 MB in the beginning and 181.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.84 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 168.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2354.90 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 168.1 MB in the beginning and 218.2 MB in the end (delta: -50.1 MB). Peak memory consumption was 115.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 212 SDtfs, 96 SDslu, 767 SDs, 0 SdLazy, 354 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 65 PreInvPairs, 73 NumberOfFragments, 57 HoareAnnotationTreeSize, 65 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 187 NumberOfCodeBlocks, 187 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 10186 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 27/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...