/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER -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 0.1.25-5644d1e-m [2020-08-18 18:40:53,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:40:53,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:40:53,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:40:53,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:40:53,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:40:53,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:40:53,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:40:53,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:40:53,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:40:53,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:40:53,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:40:53,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:40:53,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:40:53,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:40:53,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:40:53,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:40:53,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:40:53,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:40:53,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:40:53,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:40:53,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:40:53,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:40:53,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:40:53,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:40:53,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:40:53,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:40:53,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:40:53,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 18:40:53,181 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:40:53,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:40:53,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:40:53,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:40:53,183 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:40:53,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:40:53,184 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:40:53,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:40:53,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:40:53,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:40:53,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:40:53,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:40:53,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:40:53,185 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:40:53,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:40:53,186 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:40:53,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:40:53,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:40:53,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:40:53,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:40:53,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:40:53,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:40:53,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:40:53,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:40:53,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:40:53,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:40:53,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:40:53,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:40:53,188 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:40:53,188 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=5;interpolation-heuristic=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:40:53,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:40:53,514 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:40:53,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:40:53,519 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:40:53,520 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:40:53,522 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2020-08-18 18:40:53,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4a510671/1c1955e7fed0445fb446e4f304e6ae17/FLAGb9d8499cd [2020-08-18 18:40:54,084 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:40:54,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2020-08-18 18:40:54,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4a510671/1c1955e7fed0445fb446e4f304e6ae17/FLAGb9d8499cd [2020-08-18 18:40:54,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4a510671/1c1955e7fed0445fb446e4f304e6ae17 [2020-08-18 18:40:54,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:40:54,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:40:54,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:40:54,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:40:54,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:40:54,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:40:54" (1/1) ... [2020-08-18 18:40:54,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654c884d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54, skipping insertion in model container [2020-08-18 18:40:54,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:40:54" (1/1) ... [2020-08-18 18:40:54,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:40:54,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:40:54,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:40:54,701 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:40:54,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:40:54,734 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:40:54,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54 WrapperNode [2020-08-18 18:40:54,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:40:54,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:40:54,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:40:54,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:40:54,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54" (1/1) ... [2020-08-18 18:40:54,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54" (1/1) ... [2020-08-18 18:40:54,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54" (1/1) ... [2020-08-18 18:40:54,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54" (1/1) ... [2020-08-18 18:40:54,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54" (1/1) ... [2020-08-18 18:40:54,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54" (1/1) ... [2020-08-18 18:40:54,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54" (1/1) ... [2020-08-18 18:40:54,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:40:54,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:40:54,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:40:54,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:40:54,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:40:54,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:40:54,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:40:54,935 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-18 18:40:54,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:40:54,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:40:54,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:40:54,936 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-18 18:40:54,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:40:54,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:40:54,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:40:55,119 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:40:55,119 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:40:55,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:40:55 BoogieIcfgContainer [2020-08-18 18:40:55,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:40:55,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:40:55,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:40:55,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:40:55,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:40:54" (1/3) ... [2020-08-18 18:40:55,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1b5bac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:40:55, skipping insertion in model container [2020-08-18 18:40:55,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:54" (2/3) ... [2020-08-18 18:40:55,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1b5bac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:40:55, skipping insertion in model container [2020-08-18 18:40:55,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:40:55" (3/3) ... [2020-08-18 18:40:55,133 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-2.c [2020-08-18 18:40:55,147 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:40:55,155 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:40:55,172 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:40:55,203 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:40:55,203 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:40:55,204 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:40:55,204 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:40:55,204 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:40:55,204 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:40:55,204 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:40:55,204 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:40:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 18:40:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 18:40:55,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:55,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:55,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:55,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:55,258 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-08-18 18:40:55,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:55,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134316711] [2020-08-18 18:40:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:55,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:55,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:40:55,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134316711] [2020-08-18 18:40:55,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:55,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:55,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949429834] [2020-08-18 18:40:55,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:55,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:55,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:55,566 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-18 18:40:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:55,676 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-18 18:40:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:55,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 18:40:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:55,687 INFO L225 Difference]: With dead ends: 35 [2020-08-18 18:40:55,688 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 18:40:55,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:40:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 18:40:55,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 18:40:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 18:40:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-18 18:40:55,734 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-08-18 18:40:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:55,735 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-18 18:40:55,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-18 18:40:55,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 18:40:55,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:55,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:55,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:40:55,738 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:55,739 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-08-18 18:40:55,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:55,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105268052] [2020-08-18 18:40:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:55,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:55,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:40:55,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105268052] [2020-08-18 18:40:55,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:55,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:55,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979695040] [2020-08-18 18:40:55,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:55,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:55,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:55,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:55,813 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-08-18 18:40:55,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:55,877 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-08-18 18:40:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:55,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 18:40:55,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:55,880 INFO L225 Difference]: With dead ends: 27 [2020-08-18 18:40:55,880 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 18:40:55,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:40:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 18:40:55,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-08-18 18:40:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 18:40:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-18 18:40:55,889 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-08-18 18:40:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:55,890 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-18 18:40:55,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-18 18:40:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 18:40:55,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:55,892 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] [2020-08-18 18:40:55,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:40:55,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-08-18 18:40:55,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:55,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566635388] [2020-08-18 18:40:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:55,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:55,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:55,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:40:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 18:40:56,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566635388] [2020-08-18 18:40:56,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:40:56,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:40:56,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346315111] [2020-08-18 18:40:56,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:40:56,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:56,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:40:56,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:40:56,036 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-08-18 18:40:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:56,138 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-18 18:40:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:40:56,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-18 18:40:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:56,141 INFO L225 Difference]: With dead ends: 38 [2020-08-18 18:40:56,141 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 18:40:56,142 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 [2020-08-18 18:40:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 18:40:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-18 18:40:56,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 18:40:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-18 18:40:56,151 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-08-18 18:40:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:56,151 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-18 18:40:56,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:40:56,152 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-18 18:40:56,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 18:40:56,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:56,154 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] [2020-08-18 18:40:56,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:40:56,154 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:56,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:56,155 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-08-18 18:40:56,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:56,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232235047] [2020-08-18 18:40:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 18:40:56,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232235047] [2020-08-18 18:40:56,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:40:56,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:40:56,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340644380] [2020-08-18 18:40:56,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:40:56,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:56,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:40:56,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:40:56,256 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-08-18 18:40:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:56,366 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-08-18 18:40:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:40:56,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-18 18:40:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:56,370 INFO L225 Difference]: With dead ends: 41 [2020-08-18 18:40:56,370 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 18:40:56,371 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 [2020-08-18 18:40:56,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 18:40:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-18 18:40:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 18:40:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-08-18 18:40:56,402 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-08-18 18:40:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:56,402 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-08-18 18:40:56,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:40:56,403 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-08-18 18:40:56,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 18:40:56,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:56,405 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] [2020-08-18 18:40:56,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:40:56,406 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:56,406 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-08-18 18:40:56,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:56,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305894105] [2020-08-18 18:40:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 18:40:56,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305894105] [2020-08-18 18:40:56,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:40:56,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 18:40:56,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823295934] [2020-08-18 18:40:56,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:40:56,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:40:56,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:40:56,616 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 8 states. [2020-08-18 18:40:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:56,745 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-08-18 18:40:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:40:56,745 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 18:40:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:56,748 INFO L225 Difference]: With dead ends: 79 [2020-08-18 18:40:56,748 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 18:40:56,749 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 [2020-08-18 18:40:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 18:40:56,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-08-18 18:40:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 18:40:56,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-18 18:40:56,761 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 40 [2020-08-18 18:40:56,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:56,761 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-18 18:40:56,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:40:56,761 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-18 18:40:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 18:40:56,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:56,763 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] [2020-08-18 18:40:56,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:40:56,764 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:56,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2020-08-18 18:40:56,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:56,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598723743] [2020-08-18 18:40:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 18:40:56,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598723743] [2020-08-18 18:40:56,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:40:56,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:40:56,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691097305] [2020-08-18 18:40:56,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:40:56,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:56,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:40:56,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:40:56,923 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 7 states. [2020-08-18 18:40:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:57,033 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-08-18 18:40:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:40:57,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-18 18:40:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:57,036 INFO L225 Difference]: With dead ends: 65 [2020-08-18 18:40:57,037 INFO L226 Difference]: Without dead ends: 61 [2020-08-18 18:40:57,037 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 [2020-08-18 18:40:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-18 18:40:57,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-08-18 18:40:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 18:40:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2020-08-18 18:40:57,052 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2020-08-18 18:40:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:57,052 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2020-08-18 18:40:57,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:40:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2020-08-18 18:40:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-18 18:40:57,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:57,057 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] [2020-08-18 18:40:57,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:40:57,057 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:57,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2020-08-18 18:40:57,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:57,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438544374] [2020-08-18 18:40:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:40:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 104 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-18 18:40:57,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438544374] [2020-08-18 18:40:57,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:40:57,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:40:57,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577466847] [2020-08-18 18:40:57,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:40:57,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:40:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:40:57,426 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand 11 states. [2020-08-18 18:40:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:57,762 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2020-08-18 18:40:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 18:40:57,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-18 18:40:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:57,766 INFO L225 Difference]: With dead ends: 107 [2020-08-18 18:40:57,766 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 18:40:57,768 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 [2020-08-18 18:40:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 18:40:57,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-18 18:40:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 18:40:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-08-18 18:40:57,779 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-08-18 18:40:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:57,779 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-08-18 18:40:57,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:40:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-08-18 18:40:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 18:40:57,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:57,785 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] [2020-08-18 18:40:57,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:40:57,785 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:57,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-08-18 18:40:57,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:57,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560066323] [2020-08-18 18:40:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:40:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:57,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 18:40:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:40:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-08-18 18:40:58,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560066323] [2020-08-18 18:40:58,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:40:58,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:40:58,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14363626] [2020-08-18 18:40:58,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:40:58,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:58,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:40:58,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:40:58,190 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 13 states. [2020-08-18 18:40:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:58,674 INFO L93 Difference]: Finished difference Result 115 states and 189 transitions. [2020-08-18 18:40:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 18:40:58,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-08-18 18:40:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:58,678 INFO L225 Difference]: With dead ends: 115 [2020-08-18 18:40:58,678 INFO L226 Difference]: Without dead ends: 74 [2020-08-18 18:40:58,680 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 [2020-08-18 18:40:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-18 18:40:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-08-18 18:40:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 18:40:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2020-08-18 18:40:58,692 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 136 [2020-08-18 18:40:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:58,692 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2020-08-18 18:40:58,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:40:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2020-08-18 18:40:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-18 18:40:58,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:58,696 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] [2020-08-18 18:40:58,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:40:58,696 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 6 times [2020-08-18 18:40:58,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:58,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287736008] [2020-08-18 18:40:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:40:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 18:40:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 18:40:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:40:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-08-18 18:40:59,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287736008] [2020-08-18 18:40:59,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:40:59,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:40:59,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274863265] [2020-08-18 18:40:59,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:40:59,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:40:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:40:59,174 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand 10 states. [2020-08-18 18:40:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:59,452 INFO L93 Difference]: Finished difference Result 186 states and 273 transitions. [2020-08-18 18:40:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:40:59,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 177 [2020-08-18 18:40:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:59,460 INFO L225 Difference]: With dead ends: 186 [2020-08-18 18:40:59,460 INFO L226 Difference]: Without dead ends: 182 [2020-08-18 18:40:59,461 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 [2020-08-18 18:40:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-08-18 18:40:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 170. [2020-08-18 18:40:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-08-18 18:40:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 250 transitions. [2020-08-18 18:40:59,490 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 250 transitions. Word has length 177 [2020-08-18 18:40:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:59,491 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 250 transitions. [2020-08-18 18:40:59,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:40:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 250 transitions. [2020-08-18 18:40:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 18:40:59,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:59,498 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] [2020-08-18 18:40:59,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:40:59,499 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:59,499 INFO L82 PathProgramCache]: Analyzing trace with hash -530192014, now seen corresponding path program 7 times [2020-08-18 18:40:59,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:59,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846018363] [2020-08-18 18:40:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:40:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 18:40:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:40:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:40:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:40:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 18:41:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:41:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:41:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:41:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:41:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-18 18:41:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:41:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:41:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:41:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:41:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 18:41:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:41:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:41:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 18:41:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:41:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:41:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 18:41:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1358 proven. 1342 refuted. 0 times theorem prover too weak. 3339 trivial. 0 not checked. [2020-08-18 18:41:00,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846018363] [2020-08-18 18:41:00,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:00,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 18:41:00,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878504744] [2020-08-18 18:41:00,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 18:41:00,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 18:41:00,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:41:00,624 INFO L87 Difference]: Start difference. First operand 170 states and 250 transitions. Second operand 17 states. [2020-08-18 18:41:01,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:01,498 INFO L93 Difference]: Finished difference Result 281 states and 495 transitions. [2020-08-18 18:41:01,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 18:41:01,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 327 [2020-08-18 18:41:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:01,504 INFO L225 Difference]: With dead ends: 281 [2020-08-18 18:41:01,504 INFO L226 Difference]: Without dead ends: 125 [2020-08-18 18:41:01,507 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 [2020-08-18 18:41:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-08-18 18:41:01,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 101. [2020-08-18 18:41:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 18:41:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 141 transitions. [2020-08-18 18:41:01,540 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 141 transitions. Word has length 327 [2020-08-18 18:41:01,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:01,543 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 141 transitions. [2020-08-18 18:41:01,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 18:41:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 141 transitions. [2020-08-18 18:41:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-08-18 18:41:01,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:01,549 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] [2020-08-18 18:41:01,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:41:01,550 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:01,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2020-08-18 18:41:01,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:01,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752958749] [2020-08-18 18:41:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 18:41:01,635 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 18:41:01,635 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 18:41:01,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:41:01,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:41:01 BoogieIcfgContainer [2020-08-18 18:41:01,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:41:01,703 INFO L168 Benchmark]: Toolchain (without parser) took 7236.24 ms. Allocated memory was 137.4 MB in the beginning and 385.9 MB in the end (delta: 248.5 MB). Free memory was 100.7 MB in the beginning and 215.5 MB in the end (delta: -114.7 MB). Peak memory consumption was 133.8 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,704 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:41:01,705 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.67 ms. Allocated memory is still 137.4 MB. Free memory was 100.5 MB in the beginning and 91.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,708 INFO L168 Benchmark]: Boogie Preprocessor took 124.55 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.0 MB in the beginning and 179.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,711 INFO L168 Benchmark]: RCFGBuilder took 263.90 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 167.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,712 INFO L168 Benchmark]: TraceAbstraction took 6572.95 ms. Allocated memory was 200.3 MB in the beginning and 385.9 MB in the end (delta: 185.6 MB). Free memory was 166.4 MB in the beginning and 215.5 MB in the end (delta: -49.0 MB). Peak memory consumption was 136.6 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:01,722 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.67 ms. Allocated memory is still 137.4 MB. Free memory was 100.5 MB in the beginning and 91.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.55 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.0 MB in the beginning and 179.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 263.90 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 167.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6572.95 ms. Allocated memory was 200.3 MB in the beginning and 385.9 MB in the end (delta: 185.6 MB). Free memory was 166.4 MB in the beginning and 215.5 MB in the end (delta: -49.0 MB). Peak memory consumption was 136.6 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, 1133 SolverSat, 456 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, 2.8s 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...