/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:48:19,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:48:19,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:48:19,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:48:19,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:48:19,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:48:19,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:48:19,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:48:19,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:48:19,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:48:19,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:48:19,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:48:19,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:48:19,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:48:19,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:48:19,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:48:19,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:48:19,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:48:19,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:48:19,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:48:19,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:48:19,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:48:19,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:48:19,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:48:19,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:48:19,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:48:19,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:48:19,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:48:19,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:48:19,198 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:48:19,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:48:19,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:48:19,200 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:48:19,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:48:19,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:48:19,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:48:19,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:48:19,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:48:19,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:48:19,201 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:48:19,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:48:19,202 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:48:19,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:48:19,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:48:19,202 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:48:19,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:48:19,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:48:19,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:48:19,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:48:19,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:48:19,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:48:19,204 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:48:19,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:48:19,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:48:19,521 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:48:19,522 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:48:19,523 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:48:19,524 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-22 18:48:19,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b8e51c5/286f6491327d4af1a18226b20bccd8c2/FLAG683079578 [2020-08-22 18:48:19,976 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:48:19,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-22 18:48:19,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b8e51c5/286f6491327d4af1a18226b20bccd8c2/FLAG683079578 [2020-08-22 18:48:20,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b8e51c5/286f6491327d4af1a18226b20bccd8c2 [2020-08-22 18:48:20,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:48:20,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:48:20,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:48:20,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:48:20,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:48:20,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:48:20" (1/1) ... [2020-08-22 18:48:20,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b19978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20, skipping insertion in model container [2020-08-22 18:48:20,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:48:20" (1/1) ... [2020-08-22 18:48:20,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:48:20,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:48:20,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:48:20,590 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:48:20,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:48:20,629 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:48:20,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20 WrapperNode [2020-08-22 18:48:20,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:48:20,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:48:20,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:48:20,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:48:20,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ... [2020-08-22 18:48:20,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ... [2020-08-22 18:48:20,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ... [2020-08-22 18:48:20,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ... [2020-08-22 18:48:20,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ... [2020-08-22 18:48:20,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ... [2020-08-22 18:48:20,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ... [2020-08-22 18:48:20,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:48:20,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:48:20,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:48:20,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:48:20,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:48:20,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:48:20,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:48:20,842 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-22 18:48:20,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:48:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:48:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:48:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-22 18:48:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:48:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:48:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:48:21,186 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:48:21,187 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:48:21,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:48:21 BoogieIcfgContainer [2020-08-22 18:48:21,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:48:21,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:48:21,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:48:21,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:48:21,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:48:20" (1/3) ... [2020-08-22 18:48:21,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46207e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:48:21, skipping insertion in model container [2020-08-22 18:48:21,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (2/3) ... [2020-08-22 18:48:21,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46207e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:48:21, skipping insertion in model container [2020-08-22 18:48:21,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:48:21" (3/3) ... [2020-08-22 18:48:21,204 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-08-22 18:48:21,215 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:48:21,222 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:48:21,236 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:48:21,259 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:48:21,260 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:48:21,260 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:48:21,260 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:48:21,260 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:48:21,260 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:48:21,260 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:48:21,261 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:48:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-08-22 18:48:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 18:48:21,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:21,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:21,289 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:21,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:21,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-08-22 18:48:21,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:21,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130584538] [2020-08-22 18:48:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:21,363 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:21,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:21,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:48:21,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130584538] [2020-08-22 18:48:21,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:21,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:48:21,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014470439] [2020-08-22 18:48:21,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:48:21,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:21,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:48:21,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:48:21,545 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-08-22 18:48:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:21,660 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-08-22 18:48:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:48:21,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 18:48:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:21,672 INFO L225 Difference]: With dead ends: 44 [2020-08-22 18:48:21,673 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 18:48:21,676 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 [2020-08-22 18:48:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 18:48:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 18:48:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 18:48:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-22 18:48:21,721 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-08-22 18:48:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:21,722 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-22 18:48:21,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:48:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-22 18:48:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 18:48:21,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:21,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:21,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:48:21,725 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:21,726 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-08-22 18:48:21,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:21,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470715000] [2020-08-22 18:48:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:21,728 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:21,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:21,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:48:21,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470715000] [2020-08-22 18:48:21,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:21,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:48:21,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184369030] [2020-08-22 18:48:21,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:48:21,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:21,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:48:21,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:48:21,802 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-08-22 18:48:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:21,881 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-08-22 18:48:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:48:21,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-22 18:48:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:21,884 INFO L225 Difference]: With dead ends: 36 [2020-08-22 18:48:21,884 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 18:48:21,886 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 [2020-08-22 18:48:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 18:48:21,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-08-22 18:48:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 18:48:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-22 18:48:21,898 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-08-22 18:48:21,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:21,898 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-22 18:48:21,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:48:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-22 18:48:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 18:48:21,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:21,901 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:21,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:48:21,902 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:21,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:21,902 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-08-22 18:48:21,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:21,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551833900] [2020-08-22 18:48:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:21,905 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:21,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:21,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:21,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 18:48:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 18:48:22,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551833900] [2020-08-22 18:48:22,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:22,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:48:22,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572142274] [2020-08-22 18:48:22,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:48:22,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:22,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:48:22,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:48:22,091 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-08-22 18:48:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:22,263 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-08-22 18:48:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:48:22,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-22 18:48:22,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:22,266 INFO L225 Difference]: With dead ends: 52 [2020-08-22 18:48:22,266 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 18:48:22,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:48:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 18:48:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 18:48:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 18:48:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-22 18:48:22,280 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 33 [2020-08-22 18:48:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:22,281 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-22 18:48:22,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:48:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-22 18:48:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:48:22,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:22,284 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:22,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:48:22,285 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:22,285 INFO L82 PathProgramCache]: Analyzing trace with hash -643371531, now seen corresponding path program 1 times [2020-08-22 18:48:22,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:22,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876240728] [2020-08-22 18:48:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:22,289 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 18:48:22,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876240728] [2020-08-22 18:48:22,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:22,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:48:22,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791892974] [2020-08-22 18:48:22,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:48:22,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:22,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:48:22,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:48:22,397 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-08-22 18:48:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:22,523 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-08-22 18:48:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:48:22,524 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-08-22 18:48:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:22,527 INFO L225 Difference]: With dead ends: 56 [2020-08-22 18:48:22,527 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 18:48:22,528 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 [2020-08-22 18:48:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 18:48:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-08-22 18:48:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 18:48:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-08-22 18:48:22,544 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2020-08-22 18:48:22,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:22,544 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-08-22 18:48:22,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:48:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-08-22 18:48:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 18:48:22,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:22,547 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:22,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:48:22,548 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1274787059, now seen corresponding path program 2 times [2020-08-22 18:48:22,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:22,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487790223] [2020-08-22 18:48:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:22,551 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 18:48:22,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487790223] [2020-08-22 18:48:22,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:22,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:48:22,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485284821] [2020-08-22 18:48:22,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:48:22,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:22,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:48:22,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:48:22,714 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 8 states. [2020-08-22 18:48:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:22,862 INFO L93 Difference]: Finished difference Result 111 states and 156 transitions. [2020-08-22 18:48:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 18:48:22,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-22 18:48:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:22,865 INFO L225 Difference]: With dead ends: 111 [2020-08-22 18:48:22,865 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 18:48:22,867 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 [2020-08-22 18:48:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 18:48:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-08-22 18:48:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 18:48:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-08-22 18:48:22,882 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51 [2020-08-22 18:48:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:22,883 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-08-22 18:48:22,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:48:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-08-22 18:48:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 18:48:22,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:22,886 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:22,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 18:48:22,886 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:22,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:22,887 INFO L82 PathProgramCache]: Analyzing trace with hash 99184320, now seen corresponding path program 3 times [2020-08-22 18:48:22,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:22,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92724875] [2020-08-22 18:48:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:22,889 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:22,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 18:48:23,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92724875] [2020-08-22 18:48:23,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:23,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:48:23,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850597335] [2020-08-22 18:48:23,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:48:23,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:23,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:48:23,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:48:23,045 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 7 states. [2020-08-22 18:48:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:23,165 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2020-08-22 18:48:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 18:48:23,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-22 18:48:23,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:23,168 INFO L225 Difference]: With dead ends: 89 [2020-08-22 18:48:23,169 INFO L226 Difference]: Without dead ends: 83 [2020-08-22 18:48:23,170 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 [2020-08-22 18:48:23,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-22 18:48:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2020-08-22 18:48:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 18:48:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2020-08-22 18:48:23,189 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 52 [2020-08-22 18:48:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:23,190 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2020-08-22 18:48:23,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:48:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2020-08-22 18:48:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 18:48:23,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:23,196 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:23,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 18:48:23,197 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1883941443, now seen corresponding path program 4 times [2020-08-22 18:48:23,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:23,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226693207] [2020-08-22 18:48:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:23,200 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:48:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:48:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 11 proven. 69 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-08-22 18:48:23,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226693207] [2020-08-22 18:48:23,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:23,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:48:23,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638236782] [2020-08-22 18:48:23,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:48:23,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:23,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:48:23,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:48:23,611 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand 11 states. [2020-08-22 18:48:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:23,979 INFO L93 Difference]: Finished difference Result 142 states and 213 transitions. [2020-08-22 18:48:23,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 18:48:23,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 123 [2020-08-22 18:48:23,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:23,985 INFO L225 Difference]: With dead ends: 142 [2020-08-22 18:48:23,985 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 18:48:23,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-08-22 18:48:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 18:48:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-08-22 18:48:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 18:48:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-08-22 18:48:24,027 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 123 [2020-08-22 18:48:24,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:24,027 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-08-22 18:48:24,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:48:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-08-22 18:48:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-08-22 18:48:24,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:24,037 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:24,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 18:48:24,037 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash 532445701, now seen corresponding path program 5 times [2020-08-22 18:48:24,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:24,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172209121] [2020-08-22 18:48:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:24,050 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:48:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:48:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:48:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:48:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-08-22 18:48:24,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172209121] [2020-08-22 18:48:24,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:24,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 18:48:24,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001902490] [2020-08-22 18:48:24,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 18:48:24,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:24,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 18:48:24,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:48:24,606 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 13 states. [2020-08-22 18:48:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:25,036 INFO L93 Difference]: Finished difference Result 149 states and 204 transitions. [2020-08-22 18:48:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 18:48:25,037 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 193 [2020-08-22 18:48:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:25,039 INFO L225 Difference]: With dead ends: 149 [2020-08-22 18:48:25,039 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 18:48:25,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2020-08-22 18:48:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 18:48:25,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-08-22 18:48:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 18:48:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-08-22 18:48:25,056 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 193 [2020-08-22 18:48:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:25,057 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-08-22 18:48:25,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 18:48:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-08-22 18:48:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 18:48:25,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:25,059 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:25,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 18:48:25,059 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:25,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1618484333, now seen corresponding path program 6 times [2020-08-22 18:48:25,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:25,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473632807] [2020-08-22 18:48:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:25,062 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:48:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:48:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-22 18:48:25,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473632807] [2020-08-22 18:48:25,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:25,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 18:48:25,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375230307] [2020-08-22 18:48:25,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 18:48:25,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 18:48:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:48:25,540 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 16 states. [2020-08-22 18:48:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:26,030 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2020-08-22 18:48:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 18:48:26,031 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 140 [2020-08-22 18:48:26,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:26,033 INFO L225 Difference]: With dead ends: 102 [2020-08-22 18:48:26,033 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 18:48:26,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:48:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 18:48:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-08-22 18:48:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 18:48:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-08-22 18:48:26,051 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 140 [2020-08-22 18:48:26,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:26,052 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-08-22 18:48:26,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 18:48:26,052 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-08-22 18:48:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-22 18:48:26,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:26,055 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:26,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 18:48:26,055 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:26,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1853518064, now seen corresponding path program 7 times [2020-08-22 18:48:26,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:26,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309901436] [2020-08-22 18:48:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:26,059 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:48:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:48:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 18:48:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-08-22 18:48:26,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309901436] [2020-08-22 18:48:26,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:26,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:48:26,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746529543] [2020-08-22 18:48:26,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:48:26,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:26,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:48:26,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:48:26,449 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 10 states. [2020-08-22 18:48:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:26,671 INFO L93 Difference]: Finished difference Result 171 states and 210 transitions. [2020-08-22 18:48:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 18:48:26,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 175 [2020-08-22 18:48:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:26,675 INFO L225 Difference]: With dead ends: 171 [2020-08-22 18:48:26,675 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 18:48:26,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:48:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 18:48:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2020-08-22 18:48:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 18:48:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-08-22 18:48:26,702 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 175 [2020-08-22 18:48:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:26,703 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-08-22 18:48:26,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:48:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-08-22 18:48:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-08-22 18:48:26,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:48:26,709 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:48:26,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 18:48:26,710 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:48:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:48:26,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1227428144, now seen corresponding path program 8 times [2020-08-22 18:48:26,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:48:26,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491353315] [2020-08-22 18:48:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:48:26,714 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:48:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:48:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:48:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:26,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:48:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:48:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 18:48:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 18:48:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 18:48:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 18:48:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:48:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:48:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 2 proven. 97 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2020-08-22 18:48:27,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491353315] [2020-08-22 18:48:27,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:48:27,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:48:27,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992658524] [2020-08-22 18:48:27,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:48:27,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:48:27,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:48:27,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:48:27,253 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 10 states. [2020-08-22 18:48:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:48:27,470 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2020-08-22 18:48:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 18:48:27,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 228 [2020-08-22 18:48:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:48:27,472 INFO L225 Difference]: With dead ends: 165 [2020-08-22 18:48:27,472 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 18:48:27,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:48:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 18:48:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 18:48:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 18:48:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 18:48:27,474 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 228 [2020-08-22 18:48:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:48:27,475 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 18:48:27,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:48:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 18:48:27,475 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 18:48:27,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 18:48:27,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 18:48:28,538 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-08-22 18:48:28,799 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-08-22 18:48:29,108 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-08-22 18:48:29,576 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-08-22 18:48:29,948 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-08-22 18:48:30,254 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-08-22 18:48:30,501 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-08-22 18:48:30,818 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-08-22 18:48:30,872 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 18:48:30,872 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 18:48:30,873 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 18:48:30,873 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 18:48:30,873 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 18:48:30,875 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 18:48:30,875 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) the Hoare annotation is: false [2020-08-22 18:48:30,875 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-08-22 18:48:30,875 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: false [2020-08-22 18:48:30,876 INFO L264 CegarLoopResult]: At program point L26(lines 26 28) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0) (<= 5 main_~result~0) (<= main_~result~0 5)) [2020-08-22 18:48:30,876 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-08-22 18:48:30,876 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 23 30) the Hoare annotation is: (<= 5 main_~x~0) [2020-08-22 18:48:30,876 INFO L264 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: (and (<= |main_#t~ret2| 5) (<= main_~x~0 5) (<= 5 |main_#t~ret2|) (<= 5 main_~x~0)) [2020-08-22 18:48:30,876 INFO L264 CegarLoopResult]: At program point L26-2(lines 26 28) the Hoare annotation is: (<= 5 main_~x~0) [2020-08-22 18:48:30,877 INFO L264 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (<= |main_#t~ret2| 5) (<= main_~x~0 5) (<= 5 |main_#t~ret2|) (<= 5 main_~x~0)) [2020-08-22 18:48:30,878 INFO L264 CegarLoopResult]: At program point L25-3(line 25) the Hoare annotation is: (and (<= |main_#t~ret2| 5) (<= main_~x~0 5) (<= 5 |main_#t~ret2|) (<= 5 main_~x~0) (<= 5 main_~result~0) (<= main_~result~0 5)) [2020-08-22 18:48:30,878 INFO L264 CegarLoopResult]: At program point mainFINAL(lines 23 30) the Hoare annotation is: (<= 5 main_~x~0) [2020-08-22 18:48:30,878 INFO L264 CegarLoopResult]: At program point fiboEXIT(lines 5 13) the Hoare annotation is: (let ((.cse4 (= fibo_~n |fibo_#in~n|))) (let ((.cse0 (<= 1 |fibo_#res|)) (.cse1 (<= |fibo_#res| 1)) (.cse2 (and .cse4 (<= 6 |fibo_#in~n|))) (.cse3 (and (<= 5 |fibo_#res|) (<= 5 |fibo_#in~n|) .cse4 (<= |fibo_#res| 5)))) (and (or (and .cse0 .cse1) (<= |fibo_#in~n| 0) (not (<= |fibo_#in~n| 1))) (or .cse2 .cse3 (and (<= |fibo_#in~n| 4) (<= 4 |fibo_#in~n|)) (not (<= 2 |fibo_#in~n|)) (and (<= 2 |fibo_#res|) (<= |fibo_#res| 2) (<= 3 |fibo_#in~n|)) (and .cse0 .cse1 (<= |fibo_#in~n| 2))) (or (and (<= 0 |fibo_#res|) (<= |fibo_#res| 0)) (<= 1 |fibo_#in~n|)) (or .cse2 .cse3 (and .cse4 (<= |fibo_#in~n| 3)) (and (<= |fibo_#res| 3) .cse4 (<= 3 |fibo_#res|)))))) [2020-08-22 18:48:30,879 INFO L264 CegarLoopResult]: At program point fiboFINAL(lines 5 13) the Hoare annotation is: (let ((.cse4 (= fibo_~n |fibo_#in~n|))) (let ((.cse0 (<= 1 |fibo_#res|)) (.cse1 (<= |fibo_#res| 1)) (.cse2 (and .cse4 (<= 6 |fibo_#in~n|))) (.cse3 (and (<= 5 |fibo_#res|) (<= 5 |fibo_#in~n|) .cse4 (<= |fibo_#res| 5)))) (and (or (and .cse0 .cse1) (<= |fibo_#in~n| 0) (not (<= |fibo_#in~n| 1))) (or .cse2 .cse3 (and (<= |fibo_#in~n| 4) (<= 4 |fibo_#in~n|)) (not (<= 2 |fibo_#in~n|)) (and (<= 2 |fibo_#res|) (<= |fibo_#res| 2) (<= 3 |fibo_#in~n|)) (and .cse0 .cse1 (<= |fibo_#in~n| 2))) (or (and (<= 0 |fibo_#res|) (<= |fibo_#res| 0)) (<= 1 |fibo_#in~n|)) (or .cse2 .cse3 (and .cse4 (<= |fibo_#in~n| 3)) (and (<= |fibo_#res| 3) .cse4 (<= 3 |fibo_#res|)))))) [2020-08-22 18:48:30,879 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (not (<= |fibo_#in~n| 1)) (= fibo_~n |fibo_#in~n|)) [2020-08-22 18:48:30,879 INFO L264 CegarLoopResult]: At program point L11-1(line 11) the Hoare annotation is: (and (let ((.cse0 (= fibo_~n |fibo_#in~n|))) (or (and (<= 1 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 1) .cse0 (<= |fibo_#in~n| 3)) (and .cse0 (<= 6 |fibo_#in~n|)) (and (<= 3 |fibo_#t~ret0|) (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3) .cse0) (and (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse0 (<= 4 |fibo_#in~n|)))) (not (<= |fibo_#in~n| 1))) [2020-08-22 18:48:30,879 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (and (<= |fibo_#in~n| 1) (= fibo_~n |fibo_#in~n|) (<= 1 |fibo_#in~n|)) [2020-08-22 18:48:30,880 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (and (let ((.cse0 (= fibo_~n |fibo_#in~n|))) (or (and (<= 1 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 1) .cse0 (<= |fibo_#in~n| 3)) (and .cse0 (<= 6 |fibo_#in~n|)) (and (<= 3 |fibo_#t~ret0|) (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3) .cse0) (and (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse0 (<= 4 |fibo_#in~n|)))) (not (<= |fibo_#in~n| 1))) [2020-08-22 18:48:30,880 INFO L264 CegarLoopResult]: At program point L8(lines 8 12) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (<= 1 |fibo_#in~n|)) [2020-08-22 18:48:30,880 INFO L264 CegarLoopResult]: At program point L11-3(line 11) the Hoare annotation is: (let ((.cse2 (<= 1 |fibo_#t~ret0|)) (.cse0 (+ |fibo_#t~ret0| |fibo_#t~ret1|)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse1 (= fibo_~n |fibo_#in~n|))) (and (or (and (<= 3 |fibo_#t~ret0|) (<= .cse0 5) (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3) (<= 5 .cse0) .cse1) (and .cse1 (<= 6 |fibo_#in~n|)) (and (<= 2 .cse0) .cse2 (<= .cse0 2) .cse3 .cse1 (<= |fibo_#in~n| 3)) (and (<= |fibo_#in~n| 4) (<= .cse0 3) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse1 (<= 3 .cse0) (<= 4 |fibo_#in~n|)) (not (<= 3 |fibo_#in~n|))) (not (<= |fibo_#in~n| 1)) (or (not (<= |fibo_#in~n| 2)) (and .cse2 (<= 1 .cse0) (<= .cse0 1) .cse3 .cse1)))) [2020-08-22 18:48:30,880 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (<= |fibo_#in~n| 0) (= fibo_~n |fibo_#in~n|)) [2020-08-22 18:48:30,881 INFO L264 CegarLoopResult]: At program point L11-4(line 11) the Hoare annotation is: (let ((.cse2 (<= 1 |fibo_#t~ret0|)) (.cse0 (+ |fibo_#t~ret0| |fibo_#t~ret1|)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse1 (= fibo_~n |fibo_#in~n|))) (and (or (and (<= 3 |fibo_#t~ret0|) (<= .cse0 5) (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3) (<= 5 .cse0) .cse1) (and .cse1 (<= 6 |fibo_#in~n|)) (and (<= 2 .cse0) .cse2 (<= .cse0 2) .cse3 .cse1 (<= |fibo_#in~n| 3)) (and (<= |fibo_#in~n| 4) (<= .cse0 3) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse1 (<= 3 .cse0) (<= 4 |fibo_#in~n|)) (not (<= 3 |fibo_#in~n|))) (not (<= |fibo_#in~n| 1)) (or (not (<= |fibo_#in~n| 2)) (and .cse2 (<= 1 .cse0) (<= .cse0 1) .cse3 .cse1)))) [2020-08-22 18:48:30,881 INFO L264 CegarLoopResult]: At program point L6(lines 6 12) the Hoare annotation is: (= fibo_~n |fibo_#in~n|) [2020-08-22 18:48:30,881 INFO L264 CegarLoopResult]: At program point L11-5(line 11) the Hoare annotation is: (let ((.cse2 (<= 1 |fibo_#t~ret0|)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse1 (= fibo_~n |fibo_#in~n|)) (.cse0 (+ |fibo_#t~ret0| |fibo_#t~ret1|))) (or (and (<= 3 |fibo_#t~ret0|) (<= 5 |fibo_#res|) (<= .cse0 5) (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3) (<= 5 .cse0) .cse1 (<= |fibo_#res| 5)) (and (<= 2 .cse0) .cse2 (<= 2 |fibo_#res|) (<= .cse0 2) .cse3 (<= |fibo_#res| 2) .cse1 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)) (and (<= 1 |fibo_#res|) .cse2 (<= 1 .cse0) (<= .cse0 1) (<= 2 |fibo_#in~n|) .cse3 (<= |fibo_#res| 1) (<= |fibo_#in~n| 2) .cse1) (and .cse1 (<= 6 |fibo_#in~n|)) (and (<= fibo_~n 4) (<= .cse0 3) (<= 2 |fibo_#t~ret0|) (<= |fibo_#res| 3) (<= |fibo_#t~ret0| 2) .cse1 (<= 3 .cse0) (<= 3 |fibo_#res|) (<= 4 |fibo_#in~n|)))) [2020-08-22 18:48:30,881 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-08-22 18:48:30,882 INFO L264 CegarLoopResult]: At program point L11-6(line 11) the Hoare annotation is: (let ((.cse0 (<= |fibo_#in~n| 3))) (and (or (not (<= 3 |fibo_#in~n|)) (not .cse0) (and (<= 2 |fibo_#res|) (<= |fibo_#res| 2))) (let ((.cse1 (= fibo_~n |fibo_#in~n|))) (or (and .cse1 (<= 6 |fibo_#in~n|)) (and (<= |fibo_#in~n| 4) (<= |fibo_#res| 3) .cse1 (<= 3 |fibo_#res|)) (and (<= 5 |fibo_#res|) (<= 5 |fibo_#in~n|) .cse1 (<= |fibo_#res| 5)) (and .cse1 .cse0))) (or (not (<= |fibo_#in~n| 2)) (and (<= 1 |fibo_#res|) (<= 2 |fibo_#in~n|) (<= |fibo_#res| 1))))) [2020-08-22 18:48:30,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:48:30 BoogieIcfgContainer [2020-08-22 18:48:30,921 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:48:30,923 INFO L168 Benchmark]: Toolchain (without parser) took 10571.56 ms. Allocated memory was 139.5 MB in the beginning and 381.7 MB in the end (delta: 242.2 MB). Free memory was 103.8 MB in the beginning and 325.6 MB in the end (delta: -221.8 MB). Peak memory consumption was 251.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:48:30,928 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 18:48:30,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.68 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 94.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 18:48:30,929 INFO L168 Benchmark]: Boogie Preprocessor took 33.17 ms. Allocated memory is still 139.5 MB. Free memory was 94.6 MB in the beginning and 92.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-08-22 18:48:30,931 INFO L168 Benchmark]: RCFGBuilder took 527.26 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.9 MB in the beginning and 169.5 MB in the end (delta: -76.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:48:30,938 INFO L168 Benchmark]: TraceAbstraction took 9727.27 ms. Allocated memory was 202.9 MB in the beginning and 381.7 MB in the end (delta: 178.8 MB). Free memory was 169.5 MB in the beginning and 325.6 MB in the end (delta: -156.1 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2020-08-22 18:48:30,943 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.68 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 94.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.17 ms. Allocated memory is still 139.5 MB. Free memory was 94.6 MB in the beginning and 92.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 527.26 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.9 MB in the beginning and 169.5 MB in the end (delta: -76.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9727.27 ms. Allocated memory was 202.9 MB in the beginning and 381.7 MB in the end (delta: 178.8 MB). Free memory was 169.5 MB in the beginning and 325.6 MB in the end (delta: -156.1 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main: 5 <= x - ProcedureContractResult [Line: 5]: Procedure Contract for fibo Derived contract for procedure fibo: (((((1 <= \result && \result <= 1) || \old(n) <= 0) || !(\old(n) <= 1)) && ((((((n == \old(n) && 6 <= \old(n)) || (((5 <= \result && 5 <= \old(n)) && n == \old(n)) && \result <= 5)) || (\old(n) <= 4 && 4 <= \old(n))) || !(2 <= \old(n))) || ((2 <= \result && \result <= 2) && 3 <= \old(n))) || ((1 <= \result && \result <= 1) && \old(n) <= 2))) && ((0 <= \result && \result <= 0) || 1 <= \old(n))) && ((((n == \old(n) && 6 <= \old(n)) || (((5 <= \result && 5 <= \old(n)) && n == \old(n)) && \result <= 5)) || (n == \old(n) && \old(n) <= 3)) || ((\result <= 3 && n == \old(n)) && 3 <= \result)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.2s, OverallIterations: 11, TraceHistogramMax: 25, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 361 SDtfs, 477 SDslu, 1411 SDs, 0 SdLazy, 1222 SolverSat, 210 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 429 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred 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, 11 MinimizatonAttempts, 42 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 745 PreInvPairs, 1292 NumberOfFragments, 897 HoareAnnotationTreeSize, 745 FomulaSimplifications, 7860 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 31 FomulaSimplificationsInter, 7790 FormulaSimplificationTreeSizeReductionInter, 2.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...