/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 --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_7-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:21:32,392 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 21:21:32,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:21:32,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:21:32,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:21:32,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:21:32,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:21:32,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:21:32,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:21:32,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:21:32,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:21:32,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:21:32,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:21:32,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:21:32,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:21:32,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:21:32,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:21:32,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:21:32,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:21:32,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:21:32,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:21:32,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:21:32,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:21:32,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:21:32,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:21:32,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:21:32,519 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 [2020-08-21 21:21:32,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:21:32,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:21:32,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:21:32,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:21:32,544 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:21:32,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:21:32,544 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:21:32,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:21:32,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:21:32,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:21:32,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:21:32,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:21:32,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:21:32,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:21:32,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:21:32,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:21:32,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:21:32,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:21:32,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:21:32,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:21:32,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:21:32,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:21:32,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:21:32,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:21:32,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:21:32,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:21:32,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:21:32,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:21:32,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:21:32,549 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:21:32,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:21:32,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:21:32,863 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:21:32,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:21:32,865 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:21:32,866 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2020-08-21 21:21:32,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7db36ad0a/53960e02f30042b1b5841f5f95330c78/FLAG7ad970d84 [2020-08-21 21:21:33,439 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:21:33,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2020-08-21 21:21:33,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7db36ad0a/53960e02f30042b1b5841f5f95330c78/FLAG7ad970d84 [2020-08-21 21:21:33,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7db36ad0a/53960e02f30042b1b5841f5f95330c78 [2020-08-21 21:21:33,808 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:21:33,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:21:33,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:21:33,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:21:33,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:21:33,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:21:33" (1/1) ... [2020-08-21 21:21:33,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678923a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:33, skipping insertion in model container [2020-08-21 21:21:33,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:21:33" (1/1) ... [2020-08-21 21:21:33,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:21:33,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:21:34,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:21:34,026 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:21:34,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:21:34,055 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:21:34,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:34 WrapperNode [2020-08-21 21:21:34,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:21:34,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:21:34,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:21:34,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:21:34,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:34" (1/1) ... [2020-08-21 21:21:34,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:34" (1/1) ... [2020-08-21 21:21:34,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:34" (1/1) ... [2020-08-21 21:21:34,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:34" (1/1) ... [2020-08-21 21:21:34,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:34" (1/1) ... [2020-08-21 21:21:34,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:34" (1/1) ... [2020-08-21 21:21:34,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:34" (1/1) ... [2020-08-21 21:21:34,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:21:34,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:21:34,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:21:34,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:21:34,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:34" (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 [2020-08-21 21:21:34,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:21:34,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:21:34,228 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-21 21:21:34,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:21:34,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:21:34,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:21:34,228 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-21 21:21:34,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:21:34,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:21:34,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:21:34,416 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:21:34,416 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 21:21:34,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:21:34 BoogieIcfgContainer [2020-08-21 21:21:34,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:21:34,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:21:34,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:21:34,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:21:34,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:21:33" (1/3) ... [2020-08-21 21:21:34,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4c0bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:21:34, skipping insertion in model container [2020-08-21 21:21:34,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:34" (2/3) ... [2020-08-21 21:21:34,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4c0bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:21:34, skipping insertion in model container [2020-08-21 21:21:34,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:21:34" (3/3) ... [2020-08-21 21:21:34,430 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-2.c [2020-08-21 21:21:34,439 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:21:34,447 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:21:34,462 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:21:34,489 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:21:34,490 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:21:34,490 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:21:34,490 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:21:34,490 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:21:34,490 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:21:34,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:21:34,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:21:34,508 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-21 21:21:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 21:21:34,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:34,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:34,515 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-08-21 21:21:34,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:34,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958182188] [2020-08-21 21:21:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:34,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:34,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:21:34,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958182188] [2020-08-21 21:21:34,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:21:34,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:21:34,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905480869] [2020-08-21 21:21:34,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:21:34,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:34,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:21:34,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:21:34,778 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-21 21:21:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:34,895 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-21 21:21:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:21:34,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 21:21:34,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:34,907 INFO L225 Difference]: With dead ends: 35 [2020-08-21 21:21:34,908 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 21:21:34,912 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 [2020-08-21 21:21:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 21:21:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 21:21:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 21:21:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-21 21:21:34,962 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-08-21 21:21:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:34,962 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-21 21:21:34,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:21:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-21 21:21:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 21:21:34,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:34,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:34,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:21:34,966 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:34,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:34,967 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-08-21 21:21:34,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:34,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667688471] [2020-08-21 21:21:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:21:35,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667688471] [2020-08-21 21:21:35,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:21:35,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:21:35,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761322979] [2020-08-21 21:21:35,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:21:35,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:21:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:21:35,057 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-08-21 21:21:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:35,121 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-08-21 21:21:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:21:35,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 21:21:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:35,124 INFO L225 Difference]: With dead ends: 27 [2020-08-21 21:21:35,124 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 21:21:35,126 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 [2020-08-21 21:21:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 21:21:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-08-21 21:21:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 21:21:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-21 21:21:35,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-08-21 21:21:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:35,135 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-21 21:21:35,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:21:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-21 21:21:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 21:21:35,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:35,137 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] [2020-08-21 21:21:35,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:21:35,137 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-08-21 21:21:35,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:35,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430100626] [2020-08-21 21:21:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:21:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 21:21:35,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430100626] [2020-08-21 21:21:35,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:35,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:21:35,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687377176] [2020-08-21 21:21:35,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:21:35,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:35,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:21:35,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:21:35,272 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-08-21 21:21:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:35,392 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-21 21:21:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:21:35,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 21:21:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:35,394 INFO L225 Difference]: With dead ends: 38 [2020-08-21 21:21:35,394 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 21:21:35,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 21:21:35,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-21 21:21:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 21:21:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-21 21:21:35,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-08-21 21:21:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:35,403 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-21 21:21:35,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:21:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-21 21:21:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 21:21:35,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:35,405 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] [2020-08-21 21:21:35,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:21:35,406 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:35,406 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-08-21 21:21:35,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:35,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638591516] [2020-08-21 21:21:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 21:21:35,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638591516] [2020-08-21 21:21:35,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:35,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 21:21:35,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485958609] [2020-08-21 21:21:35,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:21:35,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:35,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:21:35,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:21:35,524 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-08-21 21:21:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:35,626 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-08-21 21:21:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:21:35,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-21 21:21:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:35,629 INFO L225 Difference]: With dead ends: 41 [2020-08-21 21:21:35,629 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 21:21:35,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:21:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 21:21:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-21 21:21:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 21:21:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-08-21 21:21:35,656 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-08-21 21:21:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:35,657 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-08-21 21:21:35,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:21:35,657 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-08-21 21:21:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 21:21:35,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:35,662 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:35,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:21:35,663 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:35,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:35,663 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-08-21 21:21:35,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:35,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993746020] [2020-08-21 21:21:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 21:21:35,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993746020] [2020-08-21 21:21:35,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:35,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 21:21:35,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128082543] [2020-08-21 21:21:35,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:21:35,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:35,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:21:35,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:21:35,820 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 8 states. [2020-08-21 21:21:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:35,978 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-08-21 21:21:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:21:35,979 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 21:21:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:35,981 INFO L225 Difference]: With dead ends: 79 [2020-08-21 21:21:35,981 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 21:21:35,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:21:35,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 21:21:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-08-21 21:21:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 21:21:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-21 21:21:35,995 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 40 [2020-08-21 21:21:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:35,995 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-21 21:21:35,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:21:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-21 21:21:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 21:21:35,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:35,997 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:35,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:21:35,998 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:35,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2020-08-21 21:21:35,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:35,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285657356] [2020-08-21 21:21:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 21:21:36,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285657356] [2020-08-21 21:21:36,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:36,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:21:36,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530598176] [2020-08-21 21:21:36,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:21:36,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:36,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:21:36,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:21:36,130 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 7 states. [2020-08-21 21:21:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:36,250 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-08-21 21:21:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:21:36,250 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-21 21:21:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:36,253 INFO L225 Difference]: With dead ends: 65 [2020-08-21 21:21:36,253 INFO L226 Difference]: Without dead ends: 61 [2020-08-21 21:21:36,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:36,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-21 21:21:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-08-21 21:21:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 21:21:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2020-08-21 21:21:36,269 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2020-08-21 21:21:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:36,270 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2020-08-21 21:21:36,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:21:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2020-08-21 21:21:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 21:21:36,274 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:36,274 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:36,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:21:36,275 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:36,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:36,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2020-08-21 21:21:36,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:36,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907747911] [2020-08-21 21:21:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 104 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-21 21:21:36,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907747911] [2020-08-21 21:21:36,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:36,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 21:21:36,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908990108] [2020-08-21 21:21:36,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 21:21:36,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:36,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 21:21:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:21:36,562 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand 11 states. [2020-08-21 21:21:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:36,901 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2020-08-21 21:21:36,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 21:21:36,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-21 21:21:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:36,905 INFO L225 Difference]: With dead ends: 107 [2020-08-21 21:21:36,905 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 21:21:36,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-08-21 21:21:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 21:21:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 21:21:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 21:21:36,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-08-21 21:21:36,919 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-08-21 21:21:36,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:36,919 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-08-21 21:21:36,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 21:21:36,919 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-08-21 21:21:36,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 21:21:36,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:36,925 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:36,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:21:36,925 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:36,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-08-21 21:21:36,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:36,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502873532] [2020-08-21 21:21:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:36,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 21:21:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-08-21 21:21:37,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502873532] [2020-08-21 21:21:37,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:37,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:21:37,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344280666] [2020-08-21 21:21:37,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:21:37,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:37,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:21:37,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:21:37,538 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 13 states. [2020-08-21 21:21:38,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:38,001 INFO L93 Difference]: Finished difference Result 115 states and 189 transitions. [2020-08-21 21:21:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 21:21:38,001 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-08-21 21:21:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:38,003 INFO L225 Difference]: With dead ends: 115 [2020-08-21 21:21:38,004 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 21:21:38,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-08-21 21:21:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 21:21:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-08-21 21:21:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 21:21:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2020-08-21 21:21:38,017 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 136 [2020-08-21 21:21:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:38,017 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2020-08-21 21:21:38,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:21:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2020-08-21 21:21:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-21 21:21:38,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:38,020 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:38,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:21:38,020 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:38,021 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 6 times [2020-08-21 21:21:38,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:38,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655740395] [2020-08-21 21:21:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 21:21:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 21:21:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-08-21 21:21:38,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655740395] [2020-08-21 21:21:38,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:38,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:21:38,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849418029] [2020-08-21 21:21:38,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:21:38,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:38,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:21:38,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:38,451 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand 10 states. [2020-08-21 21:21:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:38,715 INFO L93 Difference]: Finished difference Result 186 states and 273 transitions. [2020-08-21 21:21:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 21:21:38,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 177 [2020-08-21 21:21:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:38,719 INFO L225 Difference]: With dead ends: 186 [2020-08-21 21:21:38,720 INFO L226 Difference]: Without dead ends: 182 [2020-08-21 21:21:38,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:21:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-08-21 21:21:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 170. [2020-08-21 21:21:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-08-21 21:21:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 250 transitions. [2020-08-21 21:21:38,748 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 250 transitions. Word has length 177 [2020-08-21 21:21:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:38,748 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 250 transitions. [2020-08-21 21:21:38,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:21:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 250 transitions. [2020-08-21 21:21:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-21 21:21:38,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:38,754 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:38,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:21:38,755 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:38,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:38,755 INFO L82 PathProgramCache]: Analyzing trace with hash -530192014, now seen corresponding path program 7 times [2020-08-21 21:21:38,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:38,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692635819] [2020-08-21 21:21:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:38,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 21:21:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 21:21:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-21 21:21:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 21:21:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 21:21:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1358 proven. 1342 refuted. 0 times theorem prover too weak. 3339 trivial. 0 not checked. [2020-08-21 21:21:39,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692635819] [2020-08-21 21:21:39,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:39,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 21:21:39,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856408186] [2020-08-21 21:21:39,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 21:21:39,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 21:21:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-08-21 21:21:39,979 INFO L87 Difference]: Start difference. First operand 170 states and 250 transitions. Second operand 17 states. [2020-08-21 21:21:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:40,784 INFO L93 Difference]: Finished difference Result 281 states and 495 transitions. [2020-08-21 21:21:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 21:21:40,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 327 [2020-08-21 21:21:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:40,792 INFO L225 Difference]: With dead ends: 281 [2020-08-21 21:21:40,792 INFO L226 Difference]: Without dead ends: 125 [2020-08-21 21:21:40,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 21:21:40,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-08-21 21:21:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 101. [2020-08-21 21:21:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 21:21:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 141 transitions. [2020-08-21 21:21:40,823 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 141 transitions. Word has length 327 [2020-08-21 21:21:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:40,826 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 141 transitions. [2020-08-21 21:21:40,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 21:21:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 141 transitions. [2020-08-21 21:21:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-08-21 21:21:40,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:40,834 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:40,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:21:40,834 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:40,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2020-08-21 21:21:40,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:40,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003235811] [2020-08-21 21:21:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:21:40,915 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:21:40,915 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:21:40,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:21:40,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:21:40 BoogieIcfgContainer [2020-08-21 21:21:40,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:21:40,978 INFO L168 Benchmark]: Toolchain (without parser) took 7166.79 ms. Allocated memory was 138.4 MB in the beginning and 380.1 MB in the end (delta: 241.7 MB). Free memory was 102.2 MB in the beginning and 182.7 MB in the end (delta: -80.5 MB). Peak memory consumption was 161.2 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:40,978 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:21:40,979 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.70 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:40,980 INFO L168 Benchmark]: Boogie Preprocessor took 27.65 ms. Allocated memory is still 138.4 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:40,981 INFO L168 Benchmark]: RCFGBuilder took 335.09 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.3 MB in the beginning and 169.4 MB in the end (delta: -78.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:40,982 INFO L168 Benchmark]: TraceAbstraction took 6553.66 ms. Allocated memory was 201.3 MB in the beginning and 380.1 MB in the end (delta: 178.8 MB). Free memory was 168.7 MB in the beginning and 182.7 MB in the end (delta: -14.0 MB). Peak memory consumption was 164.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:40,985 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.70 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.65 ms. Allocated memory is still 138.4 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 335.09 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.3 MB in the beginning and 169.4 MB in the end (delta: -78.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6553.66 ms. Allocated memory was 201.3 MB in the beginning and 380.1 MB in the end (delta: 178.8 MB). Free memory was 168.7 MB in the beginning and 182.7 MB in the end (delta: -14.0 MB). Peak memory consumption was 164.8 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 = 7; [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 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); [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 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-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 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); [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 == 13 [L27] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, OverallIterations: 11, TraceHistogramMax: 47, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 212 SDtfs, 486 SDslu, 631 SDs, 0 SdLazy, 1132 SolverSat, 454 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 426 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 54 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 1169 NumberOfCodeBlocks, 1169 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 873 ConstructedInterpolants, 0 QuantifiedInterpolants, 275931 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 6712/9044 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...