/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=SHALLOWEST -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 20:17:28,137 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 20:17:28,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:17:28,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:17:28,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:17:28,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:17:28,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:17:28,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:17:28,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:17:28,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:17:28,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:17:28,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:17:28,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:17:28,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:17:28,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 20:17:28,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:17:28,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:17:28,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:17:28,259 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 20:17:28,296 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:17:28,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:17:28,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:17:28,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:17:28,298 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:17:28,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:17:28,298 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:17:28,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:17:28,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:17:28,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:17:28,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:17:28,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:17:28,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:17:28,300 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:17:28,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:17:28,300 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:17:28,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:17:28,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:17:28,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:17:28,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:17:28,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:17:28,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:17:28,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:17:28,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:17:28,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:17:28,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:17:28,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:17:28,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:17:28,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:17:28,303 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=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:17:28,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:17:28,643 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:17:28,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:17:28,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:17:28,651 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:17:28,653 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2020-08-18 20:17:28,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17d03f053/52ceb02e4f3c4aae8c65b5bbf30f314f/FLAGe59107fce [2020-08-18 20:17:29,174 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:17:29,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2020-08-18 20:17:29,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17d03f053/52ceb02e4f3c4aae8c65b5bbf30f314f/FLAGe59107fce [2020-08-18 20:17:29,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17d03f053/52ceb02e4f3c4aae8c65b5bbf30f314f [2020-08-18 20:17:29,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:17:29,568 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:17:29,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:17:29,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:17:29,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:17:29,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:17:29" (1/1) ... [2020-08-18 20:17:29,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703d1064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29, skipping insertion in model container [2020-08-18 20:17:29,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:17:29" (1/1) ... [2020-08-18 20:17:29,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:17:29,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:17:29,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:17:29,771 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:17:29,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:17:29,802 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:17:29,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29 WrapperNode [2020-08-18 20:17:29,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:17:29,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:17:29,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:17:29,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:17:29,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29" (1/1) ... [2020-08-18 20:17:29,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29" (1/1) ... [2020-08-18 20:17:29,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29" (1/1) ... [2020-08-18 20:17:29,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29" (1/1) ... [2020-08-18 20:17:29,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29" (1/1) ... [2020-08-18 20:17:29,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29" (1/1) ... [2020-08-18 20:17:29,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29" (1/1) ... [2020-08-18 20:17:29,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:17:29,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:17:29,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:17:29,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:17:29,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29" (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 20:17:29,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:17:29,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:17:29,971 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-18 20:17:29,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:17:29,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:17:29,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:17:29,971 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-18 20:17:29,972 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:17:29,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:17:29,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:17:30,142 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:17:30,142 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 20:17:30,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:17:30 BoogieIcfgContainer [2020-08-18 20:17:30,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:17:30,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:17:30,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:17:30,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:17:30,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:17:29" (1/3) ... [2020-08-18 20:17:30,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5686a8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:17:30, skipping insertion in model container [2020-08-18 20:17:30,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:17:29" (2/3) ... [2020-08-18 20:17:30,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5686a8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:17:30, skipping insertion in model container [2020-08-18 20:17:30,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:17:30" (3/3) ... [2020-08-18 20:17:30,155 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-2.c [2020-08-18 20:17:30,166 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:17:30,173 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:17:30,187 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:17:30,212 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:17:30,212 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:17:30,212 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:17:30,213 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:17:30,213 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:17:30,213 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:17:30,213 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:17:30,213 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:17:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 20:17:30,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 20:17:30,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:30,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:17:30,242 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:30,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:30,248 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-08-18 20:17:30,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:30,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063481752] [2020-08-18 20:17:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:30,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:30,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:30,463 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 20:17:30,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063481752] [2020-08-18 20:17:30,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:17:30,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:17:30,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103828130] [2020-08-18 20:17:30,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:17:30,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:30,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:17:30,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:17:30,505 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-18 20:17:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:30,644 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-18 20:17:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:17:30,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 20:17:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:30,655 INFO L225 Difference]: With dead ends: 35 [2020-08-18 20:17:30,656 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 20:17:30,659 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 20:17:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 20:17:30,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 20:17:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 20:17:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-18 20:17:30,701 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-08-18 20:17:30,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:30,702 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-18 20:17:30,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:17:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-18 20:17:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 20:17:30,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:30,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:17:30,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:17:30,705 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:30,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:30,706 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-08-18 20:17:30,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:30,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324051004] [2020-08-18 20:17:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:30,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:30,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:30,780 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 20:17:30,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324051004] [2020-08-18 20:17:30,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:17:30,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:17:30,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298016759] [2020-08-18 20:17:30,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:17:30,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:30,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:17:30,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:17:30,786 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-08-18 20:17:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:30,890 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-08-18 20:17:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:17:30,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 20:17:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:30,893 INFO L225 Difference]: With dead ends: 27 [2020-08-18 20:17:30,893 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 20:17:30,894 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 20:17:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 20:17:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-08-18 20:17:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 20:17:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-18 20:17:30,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-08-18 20:17:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:30,904 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-18 20:17:30,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:17:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-18 20:17:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 20:17:30,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:30,907 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 20:17:30,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:17:30,907 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:30,908 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-08-18 20:17:30,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:30,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329600242] [2020-08-18 20:17:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:17:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,112 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 20:17:31,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329600242] [2020-08-18 20:17:31,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:31,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:17:31,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222163418] [2020-08-18 20:17:31,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:17:31,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:31,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:17:31,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:17:31,116 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-08-18 20:17:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:31,210 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-18 20:17:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:17:31,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-18 20:17:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:31,212 INFO L225 Difference]: With dead ends: 38 [2020-08-18 20:17:31,212 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 20:17:31,213 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 20:17:31,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 20:17:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-18 20:17:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 20:17:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-18 20:17:31,222 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-08-18 20:17:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:31,222 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-18 20:17:31,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:17:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-18 20:17:31,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 20:17:31,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:31,225 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 20:17:31,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:17:31,225 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-08-18 20:17:31,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:31,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421086760] [2020-08-18 20:17:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,326 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 20:17:31,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421086760] [2020-08-18 20:17:31,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:31,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 20:17:31,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812570714] [2020-08-18 20:17:31,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:17:31,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:31,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:17:31,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:17:31,330 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-08-18 20:17:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:31,472 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-08-18 20:17:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:17:31,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-18 20:17:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:31,475 INFO L225 Difference]: With dead ends: 41 [2020-08-18 20:17:31,475 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 20:17:31,476 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 20:17:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 20:17:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-18 20:17:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 20:17:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-08-18 20:17:31,488 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-08-18 20:17:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:31,489 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-08-18 20:17:31,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:17:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-08-18 20:17:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 20:17:31,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:31,491 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 20:17:31,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:17:31,492 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-08-18 20:17:31,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:31,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943977493] [2020-08-18 20:17:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,640 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 20:17:31,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943977493] [2020-08-18 20:17:31,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:31,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 20:17:31,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010658481] [2020-08-18 20:17:31,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:17:31,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:31,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:17:31,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:17:31,643 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 8 states. [2020-08-18 20:17:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:31,775 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-08-18 20:17:31,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 20:17:31,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 20:17:31,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:31,778 INFO L225 Difference]: With dead ends: 79 [2020-08-18 20:17:31,778 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 20:17:31,780 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 20:17:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 20:17:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-08-18 20:17:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 20:17:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-18 20:17:31,793 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 40 [2020-08-18 20:17:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:31,793 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-18 20:17:31,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:17:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-18 20:17:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 20:17:31,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:31,796 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 20:17:31,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:17:31,796 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2020-08-18 20:17:31,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:31,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467344719] [2020-08-18 20:17:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:31,951 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 20:17:31,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467344719] [2020-08-18 20:17:31,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:31,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:17:31,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803313001] [2020-08-18 20:17:31,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:17:31,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:31,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:17:31,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:17:31,954 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 7 states. [2020-08-18 20:17:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:32,078 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-08-18 20:17:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:17:32,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-18 20:17:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:32,082 INFO L225 Difference]: With dead ends: 65 [2020-08-18 20:17:32,082 INFO L226 Difference]: Without dead ends: 61 [2020-08-18 20:17:32,083 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 20:17:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-18 20:17:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-08-18 20:17:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 20:17:32,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2020-08-18 20:17:32,098 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2020-08-18 20:17:32,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:32,098 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2020-08-18 20:17:32,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:17:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2020-08-18 20:17:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-18 20:17:32,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:32,103 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 20:17:32,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:17:32,104 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:32,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:32,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2020-08-18 20:17:32,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:32,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648445572] [2020-08-18 20:17:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,384 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 20:17:32,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648445572] [2020-08-18 20:17:32,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:32,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 20:17:32,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746251306] [2020-08-18 20:17:32,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 20:17:32,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:32,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 20:17:32,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:17:32,388 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand 11 states. [2020-08-18 20:17:32,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:32,710 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2020-08-18 20:17:32,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 20:17:32,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-18 20:17:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:32,714 INFO L225 Difference]: With dead ends: 107 [2020-08-18 20:17:32,715 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 20:17:32,717 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 20:17:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 20:17:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-18 20:17:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 20:17:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-08-18 20:17:32,728 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-08-18 20:17:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:32,729 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-08-18 20:17:32,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 20:17:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-08-18 20:17:32,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 20:17:32,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:32,735 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 20:17:32,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:17:32,736 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-08-18 20:17:32,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:32,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340419675] [2020-08-18 20:17:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:32,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 20:17:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,254 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 20:17:33,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340419675] [2020-08-18 20:17:33,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:33,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 20:17:33,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543178638] [2020-08-18 20:17:33,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 20:17:33,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 20:17:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-18 20:17:33,258 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 13 states. [2020-08-18 20:17:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:33,730 INFO L93 Difference]: Finished difference Result 115 states and 189 transitions. [2020-08-18 20:17:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 20:17:33,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-08-18 20:17:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:33,733 INFO L225 Difference]: With dead ends: 115 [2020-08-18 20:17:33,733 INFO L226 Difference]: Without dead ends: 74 [2020-08-18 20:17:33,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-08-18 20:17:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-18 20:17:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-08-18 20:17:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 20:17:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2020-08-18 20:17:33,747 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 136 [2020-08-18 20:17:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:33,747 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2020-08-18 20:17:33,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 20:17:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2020-08-18 20:17:33,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-18 20:17:33,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:33,750 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 20:17:33,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:17:33,751 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:33,751 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 6 times [2020-08-18 20:17:33,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:33,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81403826] [2020-08-18 20:17:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:33,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 20:17:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 20:17:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,153 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 20:17:34,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81403826] [2020-08-18 20:17:34,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:34,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 20:17:34,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900366246] [2020-08-18 20:17:34,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 20:17:34,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:34,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 20:17:34,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:17:34,157 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand 10 states. [2020-08-18 20:17:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:34,385 INFO L93 Difference]: Finished difference Result 186 states and 273 transitions. [2020-08-18 20:17:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 20:17:34,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 177 [2020-08-18 20:17:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:34,390 INFO L225 Difference]: With dead ends: 186 [2020-08-18 20:17:34,390 INFO L226 Difference]: Without dead ends: 182 [2020-08-18 20:17:34,391 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 20:17:34,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-08-18 20:17:34,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 170. [2020-08-18 20:17:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-08-18 20:17:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 250 transitions. [2020-08-18 20:17:34,417 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 250 transitions. Word has length 177 [2020-08-18 20:17:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:34,417 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 250 transitions. [2020-08-18 20:17:34,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 20:17:34,418 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 250 transitions. [2020-08-18 20:17:34,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 20:17:34,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:34,423 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 20:17:34,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:17:34,423 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:34,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:34,424 INFO L82 PathProgramCache]: Analyzing trace with hash -530192014, now seen corresponding path program 7 times [2020-08-18 20:17:34,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:34,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134870388] [2020-08-18 20:17:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:17:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:17:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 20:17:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 20:17:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:34,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-18 20:17:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:17:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 20:17:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 20:17:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 20:17:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:17:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 20:17:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:17:35,410 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 20:17:35,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134870388] [2020-08-18 20:17:35,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:17:35,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 20:17:35,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891886780] [2020-08-18 20:17:35,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 20:17:35,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:17:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 20:17:35,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-08-18 20:17:35,413 INFO L87 Difference]: Start difference. First operand 170 states and 250 transitions. Second operand 17 states. [2020-08-18 20:17:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:17:36,217 INFO L93 Difference]: Finished difference Result 281 states and 495 transitions. [2020-08-18 20:17:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 20:17:36,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 327 [2020-08-18 20:17:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:17:36,221 INFO L225 Difference]: With dead ends: 281 [2020-08-18 20:17:36,221 INFO L226 Difference]: Without dead ends: 125 [2020-08-18 20:17:36,223 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 20:17:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-08-18 20:17:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 101. [2020-08-18 20:17:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 20:17:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 141 transitions. [2020-08-18 20:17:36,238 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 141 transitions. Word has length 327 [2020-08-18 20:17:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:17:36,239 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 141 transitions. [2020-08-18 20:17:36,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 20:17:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 141 transitions. [2020-08-18 20:17:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-08-18 20:17:36,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:17:36,244 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 20:17:36,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 20:17:36,244 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:17:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:17:36,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2020-08-18 20:17:36,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:17:36,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738926329] [2020-08-18 20:17:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:17:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 20:17:36,319 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 20:17:36,319 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 20:17:36,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 20:17:36,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:17:36 BoogieIcfgContainer [2020-08-18 20:17:36,357 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:17:36,360 INFO L168 Benchmark]: Toolchain (without parser) took 6790.63 ms. Allocated memory was 139.5 MB in the beginning and 363.3 MB in the end (delta: 223.9 MB). Free memory was 103.2 MB in the beginning and 93.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 233.5 MB. Max. memory is 7.1 GB. [2020-08-18 20:17:36,361 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 20:17:36,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.30 ms. Allocated memory is still 139.5 MB. Free memory was 102.8 MB in the beginning and 93.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-18 20:17:36,362 INFO L168 Benchmark]: Boogie Preprocessor took 30.71 ms. Allocated memory is still 139.5 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:17:36,363 INFO L168 Benchmark]: RCFGBuilder took 312.99 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.3 MB in the beginning and 170.3 MB in the end (delta: -78.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 20:17:36,364 INFO L168 Benchmark]: TraceAbstraction took 6209.17 ms. Allocated memory was 202.4 MB in the beginning and 363.3 MB in the end (delta: 161.0 MB). Free memory was 170.3 MB in the beginning and 93.6 MB in the end (delta: 76.6 MB). Peak memory consumption was 237.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:17:36,368 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.30 ms. Allocated memory is still 139.5 MB. Free memory was 102.8 MB in the beginning and 93.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.71 ms. Allocated memory is still 139.5 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.99 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.3 MB in the beginning and 170.3 MB in the end (delta: -78.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6209.17 ms. Allocated memory was 202.4 MB in the beginning and 363.3 MB in the end (delta: 161.0 MB). Free memory was 170.3 MB in the beginning and 93.6 MB in the end (delta: 76.6 MB). Peak memory consumption was 237.6 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: 6.1s, 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, 1126 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, 2.6s 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...