/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/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:03:10,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:03:10,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:03:10,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:03:10,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:03:10,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:03:10,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:03:10,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:03:10,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:03:10,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:03:10,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:03:10,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:03:10,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:03:10,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:03:10,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:03:10,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:03:10,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:03:10,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:03:10,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:03:10,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:03:10,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:03:10,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:03:10,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:03:10,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:03:10,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:03:10,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:03:10,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:03:10,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:03:10,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:03:10,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:03:10,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:03:10,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:03:10,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:03:10,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:03:10,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:03:10,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:03:10,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:03:10,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:03:10,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:03:10,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:03:10,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:03:10,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:03:10,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:03:10,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:03:10,625 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:03:10,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:03:10,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:03:10,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:03:10,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:03:10,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:03:10,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:03:10,626 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:03:10,882 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:03:10,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:03:10,897 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:03:10,898 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:03:10,899 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:03:10,900 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-07 13:03:10,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0ab9faa3/4ccf17543da24745b4d78d4325b4cf2d/FLAGc988b195d [2020-07-07 13:03:11,398 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:03:11,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-07 13:03:11,404 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0ab9faa3/4ccf17543da24745b4d78d4325b4cf2d/FLAGc988b195d [2020-07-07 13:03:11,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0ab9faa3/4ccf17543da24745b4d78d4325b4cf2d [2020-07-07 13:03:11,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:03:11,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:03:11,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:11,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:03:11,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:03:11,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:11" (1/1) ... [2020-07-07 13:03:11,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec38cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:11, skipping insertion in model container [2020-07-07 13:03:11,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:11" (1/1) ... [2020-07-07 13:03:11,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:03:11,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:03:11,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:11,981 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:03:11,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:12,011 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:03:12,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:12 WrapperNode [2020-07-07 13:03:12,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:12,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:03:12,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:03:12,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:03:12,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:12" (1/1) ... [2020-07-07 13:03:12,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:12" (1/1) ... [2020-07-07 13:03:12,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:12" (1/1) ... [2020-07-07 13:03:12,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:12" (1/1) ... [2020-07-07 13:03:12,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:12" (1/1) ... [2020-07-07 13:03:12,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:12" (1/1) ... [2020-07-07 13:03:12,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:12" (1/1) ... [2020-07-07 13:03:12,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:03:12,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:03:12,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:03:12,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:03:12,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:12" (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 [2020-07-07 13:03:12,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:03:12,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:03:12,183 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-07 13:03:12,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:03:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:03:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:03:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-07 13:03:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:03:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:03:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:03:12,366 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:03:12,366 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:03:12,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:12 BoogieIcfgContainer [2020-07-07 13:03:12,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:03:12,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:03:12,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:03:12,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:03:12,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:03:11" (1/3) ... [2020-07-07 13:03:12,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4103e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:12, skipping insertion in model container [2020-07-07 13:03:12,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:12" (2/3) ... [2020-07-07 13:03:12,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4103e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:12, skipping insertion in model container [2020-07-07 13:03:12,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:12" (3/3) ... [2020-07-07 13:03:12,379 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-07-07 13:03:12,390 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:03:12,397 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:03:12,411 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:03:12,436 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:03:12,437 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:03:12,437 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:03:12,438 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:03:12,438 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:03:12,438 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:03:12,438 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:03:12,438 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:03:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-07 13:03:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 13:03:12,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:12,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:12,474 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:12,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1379859160, now seen corresponding path program 1 times [2020-07-07 13:03:12,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:12,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438319431] [2020-07-07 13:03:12,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:03:12,779 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:12,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438319431] [2020-07-07 13:03:12,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:12,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:03:12,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940938432] [2020-07-07 13:03:12,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:03:12,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:12,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:03:12,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:03:12,801 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 7 states. [2020-07-07 13:03:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:13,068 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-07 13:03:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:03:13,070 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-07 13:03:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:13,087 INFO L225 Difference]: With dead ends: 50 [2020-07-07 13:03:13,088 INFO L226 Difference]: Without dead ends: 31 [2020-07-07 13:03:13,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:03:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-07 13:03:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-07 13:03:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-07 13:03:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-07 13:03:13,164 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2020-07-07 13:03:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:13,165 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-07 13:03:13,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:03:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-07 13:03:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 13:03:13,167 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:13,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:13,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:03:13,168 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:13,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2056866127, now seen corresponding path program 1 times [2020-07-07 13:03:13,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:13,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004224716] [2020-07-07 13:03:13,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:03:13,254 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:13,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004224716] [2020-07-07 13:03:13,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:13,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:03:13,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571795333] [2020-07-07 13:03:13,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:03:13,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:13,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:03:13,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:03:13,258 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-07-07 13:03:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:13,388 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-07 13:03:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:03:13,388 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-07 13:03:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:13,390 INFO L225 Difference]: With dead ends: 39 [2020-07-07 13:03:13,390 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 13:03:13,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:03:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 13:03:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-07-07 13:03:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-07 13:03:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-07 13:03:13,403 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2020-07-07 13:03:13,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:13,404 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-07 13:03:13,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:03:13,404 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-07 13:03:13,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-07 13:03:13,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:13,407 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, 1, 1, 1] [2020-07-07 13:03:13,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:03:13,407 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:13,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:13,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1274124978, now seen corresponding path program 1 times [2020-07-07 13:03:13,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:13,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116057857] [2020-07-07 13:03:13,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 13:03:13,562 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:13,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116057857] [2020-07-07 13:03:13,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:13,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:03:13,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219004254] [2020-07-07 13:03:13,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:03:13,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:13,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:03:13,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:03:13,566 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2020-07-07 13:03:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:13,675 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-07-07 13:03:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:03:13,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-07-07 13:03:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:13,677 INFO L225 Difference]: With dead ends: 55 [2020-07-07 13:03:13,677 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 13:03:13,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:03:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 13:03:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-07 13:03:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 13:03:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-07 13:03:13,695 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 36 [2020-07-07 13:03:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:13,696 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-07 13:03:13,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:03:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-07 13:03:13,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 13:03:13,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:13,698 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, 1, 1, 1] [2020-07-07 13:03:13,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:03:13,698 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:13,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2043121517, now seen corresponding path program 1 times [2020-07-07 13:03:13,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:13,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080891799] [2020-07-07 13:03:13,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 13:03:13,860 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:13,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080891799] [2020-07-07 13:03:13,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:13,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 13:03:13,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297220852] [2020-07-07 13:03:13,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 13:03:13,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:13,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 13:03:13,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:03:13,863 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 11 states. [2020-07-07 13:03:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:14,142 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-07-07 13:03:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 13:03:14,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-07 13:03:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:14,146 INFO L225 Difference]: With dead ends: 51 [2020-07-07 13:03:14,146 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 13:03:14,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-07-07 13:03:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 13:03:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-07 13:03:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-07 13:03:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-07-07 13:03:14,159 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 37 [2020-07-07 13:03:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:14,160 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-07-07 13:03:14,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 13:03:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-07-07 13:03:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-07 13:03:14,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:14,163 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:14,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:03:14,163 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:14,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1985616609, now seen corresponding path program 1 times [2020-07-07 13:03:14,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:14,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027602039] [2020-07-07 13:03:14,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-07 13:03:14,285 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:14,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027602039] [2020-07-07 13:03:14,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:14,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:03:14,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770959726] [2020-07-07 13:03:14,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:03:14,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:03:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:03:14,288 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 7 states. [2020-07-07 13:03:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:14,404 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-07-07 13:03:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:03:14,405 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-07-07 13:03:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:14,406 INFO L225 Difference]: With dead ends: 76 [2020-07-07 13:03:14,406 INFO L226 Difference]: Without dead ends: 43 [2020-07-07 13:03:14,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:03:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-07 13:03:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-07 13:03:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 13:03:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-07 13:03:14,419 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 56 [2020-07-07 13:03:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:14,420 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-07 13:03:14,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:03:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-07 13:03:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-07 13:03:14,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:14,422 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, 1, 1, 1] [2020-07-07 13:03:14,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:03:14,423 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash 847598467, now seen corresponding path program 2 times [2020-07-07 13:03:14,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:14,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763487603] [2020-07-07 13:03:14,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 13:03:14,599 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:14,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763487603] [2020-07-07 13:03:14,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:14,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:03:14,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57416917] [2020-07-07 13:03:14,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:03:14,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:03:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:03:14,605 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 8 states. [2020-07-07 13:03:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:14,692 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-07-07 13:03:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:03:14,693 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-07 13:03:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:14,700 INFO L225 Difference]: With dead ends: 77 [2020-07-07 13:03:14,700 INFO L226 Difference]: Without dead ends: 43 [2020-07-07 13:03:14,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:03:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-07 13:03:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-07 13:03:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 13:03:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-07-07 13:03:14,713 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 54 [2020-07-07 13:03:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:14,713 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-07-07 13:03:14,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:03:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-07-07 13:03:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 13:03:14,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:14,717 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, 1, 1, 1] [2020-07-07 13:03:14,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:03:14,718 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:14,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:14,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1275966376, now seen corresponding path program 3 times [2020-07-07 13:03:14,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:14,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854897167] [2020-07-07 13:03:14,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-07 13:03:14,899 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:14,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854897167] [2020-07-07 13:03:14,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:14,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 13:03:14,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123322500] [2020-07-07 13:03:14,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 13:03:14,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:14,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 13:03:14,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-07 13:03:14,901 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 13 states. [2020-07-07 13:03:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:15,224 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-07-07 13:03:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 13:03:15,224 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-07 13:03:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:15,226 INFO L225 Difference]: With dead ends: 61 [2020-07-07 13:03:15,226 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 13:03:15,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2020-07-07 13:03:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 13:03:15,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-07 13:03:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 13:03:15,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-07 13:03:15,237 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 55 [2020-07-07 13:03:15,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:15,238 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-07 13:03:15,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 13:03:15,238 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-07 13:03:15,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-07 13:03:15,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:15,240 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:15,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:03:15,240 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:15,240 INFO L82 PathProgramCache]: Analyzing trace with hash -778718797, now seen corresponding path program 4 times [2020-07-07 13:03:15,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:15,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895897199] [2020-07-07 13:03:15,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 17 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-07 13:03:15,405 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:15,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895897199] [2020-07-07 13:03:15,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:15,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 13:03:15,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895537016] [2020-07-07 13:03:15,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 13:03:15,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:15,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 13:03:15,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:03:15,407 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 10 states. [2020-07-07 13:03:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:15,545 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2020-07-07 13:03:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:03:15,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 90 [2020-07-07 13:03:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:15,547 INFO L225 Difference]: With dead ends: 98 [2020-07-07 13:03:15,547 INFO L226 Difference]: Without dead ends: 62 [2020-07-07 13:03:15,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-07-07 13:03:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-07 13:03:15,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-07-07 13:03:15,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-07 13:03:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-07-07 13:03:15,560 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 90 [2020-07-07 13:03:15,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:15,561 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-07-07 13:03:15,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 13:03:15,561 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-07-07 13:03:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-07 13:03:15,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:15,563 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, 1, 1, 1] [2020-07-07 13:03:15,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:03:15,563 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:15,563 INFO L82 PathProgramCache]: Analyzing trace with hash 237402259, now seen corresponding path program 5 times [2020-07-07 13:03:15,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:15,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235766442] [2020-07-07 13:03:15,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 17 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 17 to 31 Garbage collection #2: 31 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 31 to 61 Garbage collection #3: 61 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 61 to 113 Garbage collection #4: 113 nodes / 0 free / 0.001s / 0.001s total Resizing node table from 113 to 223 [2020-07-07 13:03:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-07-07 13:03:15,897 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:15,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235766442] [2020-07-07 13:03:15,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:15,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 13:03:15,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064789695] [2020-07-07 13:03:15,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 13:03:15,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 13:03:15,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-07 13:03:15,900 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 14 states. [2020-07-07 13:03:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:16,109 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2020-07-07 13:03:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 13:03:16,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 126 [2020-07-07 13:03:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:16,115 INFO L225 Difference]: With dead ends: 124 [2020-07-07 13:03:16,115 INFO L226 Difference]: Without dead ends: 77 [2020-07-07 13:03:16,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-07 13:03:16,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-07 13:03:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-07-07 13:03:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-07 13:03:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-07-07 13:03:16,145 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 126 [2020-07-07 13:03:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:16,146 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-07-07 13:03:16,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 13:03:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-07-07 13:03:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-07 13:03:16,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:16,150 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:16,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:03:16,150 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1698410615, now seen corresponding path program 6 times [2020-07-07 13:03:16,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:16,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684007326] [2020-07-07 13:03:16,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 17 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 17 to 31 Garbage collection #2: 31 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 31 to 61 Garbage collection #3: 61 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 61 to 113 Garbage collection #4: 113 nodes / 0 free / 0.001s / 0.001s total Resizing node table from 113 to 223 [2020-07-07 13:03:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-07 13:03:16,481 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:16,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684007326] [2020-07-07 13:03:16,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:16,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 13:03:16,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220880259] [2020-07-07 13:03:16,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 13:03:16,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:16,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 13:03:16,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-07-07 13:03:16,484 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 15 states. [2020-07-07 13:03:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:16,845 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-07-07 13:03:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 13:03:16,847 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 90 [2020-07-07 13:03:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:16,847 INFO L225 Difference]: With dead ends: 68 [2020-07-07 13:03:16,847 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 13:03:16,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-07-07 13:03:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 13:03:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 13:03:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 13:03:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 13:03:16,851 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2020-07-07 13:03:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:16,851 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 13:03:16,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 13:03:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 13:03:16,851 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 13:03:16,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 13:03:16,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 13:03:17,722 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 19 [2020-07-07 13:03:17,962 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2020-07-07 13:03:18,092 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 23 [2020-07-07 13:03:18,237 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 19 [2020-07-07 13:03:18,420 INFO L264 CegarLoopResult]: At program point fibonacciFINAL(lines 14 22) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= 1 |fibonacci_#res|) (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1)) .cse0) (and (<= |fibonacci_#in~n| 0) (<= 0 |fibonacci_#res|) .cse0))) [2020-07-07 13:03:18,421 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-07 13:03:18,421 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-07 13:03:18,421 INFO L264 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= fibonacci_~n 2) (< 1 fibonacci_~n) (<= 1 |fibonacci_#t~ret0|) .cse0) (and (<= fibonacci_~n (+ |fibonacci_#t~ret0| 2)) (<= 3 fibonacci_~n) .cse0))) [2020-07-07 13:03:18,421 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= |fibonacci_#in~n| 1) (< 0 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-07 13:03:18,421 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= fibonacci_~n 2) (< 1 fibonacci_~n) (<= 1 |fibonacci_#t~ret0|) .cse0) (and (<= fibonacci_~n (+ |fibonacci_#t~ret0| 2)) (<= 3 fibonacci_~n) .cse0))) [2020-07-07 13:03:18,422 INFO L264 CegarLoopResult]: At program point fibonacciEXIT(lines 14 22) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= 1 |fibonacci_#res|) (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1)) .cse0) (and (<= |fibonacci_#in~n| 0) (<= 0 |fibonacci_#res|) .cse0))) [2020-07-07 13:03:18,422 INFO L264 CegarLoopResult]: At program point L17(lines 17 21) the Hoare annotation is: (and (< 0 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-07 13:03:18,422 INFO L264 CegarLoopResult]: At program point L20-3(line 20) the Hoare annotation is: (let ((.cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret1| |fibonacci_#t~ret0| 1))) (.cse1 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= fibonacci_~n (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 fibonacci_~n) .cse1) (and (< 1 fibonacci_~n) .cse0 (<= fibonacci_~n (+ |fibonacci_#t~ret0| 1)) .cse1))) [2020-07-07 13:03:18,422 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= |fibonacci_#in~n| 0) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-07 13:03:18,422 INFO L264 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (let ((.cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret1| |fibonacci_#t~ret0| 1))) (.cse1 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= fibonacci_~n (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 fibonacci_~n) .cse1) (and (< 1 fibonacci_~n) .cse0 (<= fibonacci_~n (+ |fibonacci_#t~ret0| 1)) .cse1))) [2020-07-07 13:03:18,422 INFO L264 CegarLoopResult]: At program point L15(lines 15 21) the Hoare annotation is: (= fibonacci_~n |fibonacci_#in~n|) [2020-07-07 13:03:18,422 INFO L264 CegarLoopResult]: At program point L20-5(line 20) the Hoare annotation is: (let ((.cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret1| |fibonacci_#t~ret0| 1))) (.cse1 (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1))) (.cse2 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (< 1 fibonacci_~n) .cse0 (<= fibonacci_~n (+ |fibonacci_#t~ret0| 1)) .cse1 .cse2) (and (<= fibonacci_~n (+ |fibonacci_#t~ret0| 2)) .cse0 .cse1 (<= 3 fibonacci_~n) .cse2))) [2020-07-07 13:03:18,423 INFO L264 CegarLoopResult]: At program point L20-6(line 20) the Hoare annotation is: (let ((.cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1))) (.cse1 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= fibonacci_~n (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 fibonacci_~n) .cse1) (and (< 1 fibonacci_~n) (<= fibonacci_~n (+ |fibonacci_#t~ret0| 1)) .cse0 .cse1))) [2020-07-07 13:03:18,423 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 13:03:18,423 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-07 13:03:18,423 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-07 13:03:18,423 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 13:03:18,423 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 13:03:18,423 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-07 13:03:18,423 INFO L271 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-07-07 13:03:18,423 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) the Hoare annotation is: false [2020-07-07 13:03:18,423 INFO L264 CegarLoopResult]: At program point L31(lines 31 35) the Hoare annotation is: (<= main_~x~0 (+ main_~result~0 1)) [2020-07-07 13:03:18,424 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-07 13:03:18,424 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-07 13:03:18,424 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (<= main_~x~0 (+ |main_#t~ret3| 1)) [2020-07-07 13:03:18,424 INFO L271 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-07-07 13:03:18,424 INFO L264 CegarLoopResult]: At program point L30-2(line 30) the Hoare annotation is: (<= main_~x~0 (+ |main_#t~ret3| 1)) [2020-07-07 13:03:18,424 INFO L271 CegarLoopResult]: At program point L27(lines 27 29) the Hoare annotation is: true [2020-07-07 13:03:18,424 INFO L264 CegarLoopResult]: At program point L30-3(line 30) the Hoare annotation is: (and (<= main_~x~0 (+ |main_#t~ret3| 1)) (<= main_~x~0 (+ main_~result~0 1))) [2020-07-07 13:03:18,424 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-07-07 13:03:18,425 INFO L271 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: true [2020-07-07 13:03:18,425 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 25 36) the Hoare annotation is: true [2020-07-07 13:03:18,425 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 25 36) the Hoare annotation is: true [2020-07-07 13:03:18,425 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: false [2020-07-07 13:03:18,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:03:18 BoogieIcfgContainer [2020-07-07 13:03:18,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:03:18,445 INFO L168 Benchmark]: Toolchain (without parser) took 6653.83 ms. Allocated memory was 145.2 MB in the beginning and 299.4 MB in the end (delta: 154.1 MB). Free memory was 101.9 MB in the beginning and 139.8 MB in the end (delta: -37.9 MB). Peak memory consumption was 140.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:18,446 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 145.2 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:03:18,446 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.00 ms. Allocated memory is still 145.2 MB. Free memory was 101.7 MB in the beginning and 92.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:18,447 INFO L168 Benchmark]: Boogie Preprocessor took 27.44 ms. Allocated memory is still 145.2 MB. Free memory was 92.3 MB in the beginning and 90.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:18,448 INFO L168 Benchmark]: RCFGBuilder took 330.27 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 90.9 MB in the beginning and 169.5 MB in the end (delta: -78.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:18,449 INFO L168 Benchmark]: TraceAbstraction took 6070.06 ms. Allocated memory was 202.4 MB in the beginning and 299.4 MB in the end (delta: 97.0 MB). Free memory was 168.9 MB in the beginning and 139.8 MB in the end (delta: 29.1 MB). Peak memory consumption was 150.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:18,452 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 145.2 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.00 ms. Allocated memory is still 145.2 MB. Free memory was 101.7 MB in the beginning and 92.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.44 ms. Allocated memory is still 145.2 MB. Free memory was 92.3 MB in the beginning and 90.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.27 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 90.9 MB in the beginning and 169.5 MB in the end (delta: -78.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6070.06 ms. Allocated memory was 202.4 MB in the beginning and 299.4 MB in the end (delta: 97.0 MB). Free memory was 168.9 MB in the beginning and 139.8 MB in the end (delta: 29.1 MB). Peak memory consumption was 150.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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: 14]: Procedure Contract for fibonacci Derived contract for procedure fibonacci: ((1 <= \result && \old(n) <= \result + 1) && n == \old(n)) || ((\old(n) <= 0 && 0 <= \result) && n == \old(n)) - ProcedureContractResult [Line: 25]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 10, TraceHistogramMax: 13, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 265 SDtfs, 441 SDslu, 1000 SDs, 0 SdLazy, 972 SolverSat, 170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 294 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 31 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 35 LocationsWithAnnotation, 371 PreInvPairs, 632 NumberOfFragments, 332 HoareAnnotationTreeSize, 371 FomulaSimplifications, 12119 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 35 FomulaSimplificationsInter, 2957 FormulaSimplificationTreeSizeReductionInter, 0.9s 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...