/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_2calls_8-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 13:14:45,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 13:14:45,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 13:14:45,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 13:14:45,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 13:14:45,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 13:14:45,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 13:14:45,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 13:14:45,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 13:14:45,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 13:14:45,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 13:14:45,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 13:14:45,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 13:14:45,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 13:14:45,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 13:14:45,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 13:14:45,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 13:14:45,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 13:14:45,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 13:14:45,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 13:14:45,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 13:14:45,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 13:14:45,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 13:14:45,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 13:14:45,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 13:14:45,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 13:14:45,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 13:14:45,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 13:14:45,388 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 13:14:45,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 13:14:45,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 13:14:45,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 13:14:45,399 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 13:14:45,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 13:14:45,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 13:14:45,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 13:14:45,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 13:14:45,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 13:14:45,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 13:14:45,400 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 13:14:45,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 13:14:45,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 13:14:45,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 13:14:45,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 13:14:45,401 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 13:14:45,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 13:14:45,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 13:14:45,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:14:45,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 13:14:45,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 13:14:45,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 13:14:45,403 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 13:14:45,672 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 13:14:45,685 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 13:14:45,689 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 13:14:45,691 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 13:14:45,691 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 13:14:45,692 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-17 13:14:45,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b48161267/2f03be05676a45dca1f8843056898e87/FLAGc71f445b8 [2020-07-17 13:14:46,227 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 13:14:46,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-17 13:14:46,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b48161267/2f03be05676a45dca1f8843056898e87/FLAGc71f445b8 [2020-07-17 13:14:46,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b48161267/2f03be05676a45dca1f8843056898e87 [2020-07-17 13:14:46,609 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 13:14:46,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 13:14:46,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:46,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 13:14:46,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 13:14:46,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:46" (1/1) ... [2020-07-17 13:14:46,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e44de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46, skipping insertion in model container [2020-07-17 13:14:46,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:46" (1/1) ... [2020-07-17 13:14:46,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 13:14:46,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 13:14:46,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:46,846 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 13:14:46,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:46,877 INFO L208 MainTranslator]: Completed translation [2020-07-17 13:14:46,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46 WrapperNode [2020-07-17 13:14:46,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:46,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 13:14:46,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 13:14:46,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 13:14:46,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46" (1/1) ... [2020-07-17 13:14:46,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46" (1/1) ... [2020-07-17 13:14:46,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46" (1/1) ... [2020-07-17 13:14:46,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46" (1/1) ... [2020-07-17 13:14:46,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46" (1/1) ... [2020-07-17 13:14:46,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46" (1/1) ... [2020-07-17 13:14:46,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46" (1/1) ... [2020-07-17 13:14:46,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 13:14:46,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 13:14:46,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 13:14:46,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 13:14:46,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46" (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 [2020-07-17 13:14:47,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 13:14:47,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 13:14:47,057 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-17 13:14:47,057 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-17 13:14:47,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 13:14:47,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 13:14:47,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 13:14:47,058 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-17 13:14:47,058 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-17 13:14:47,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 13:14:47,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 13:14:47,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 13:14:47,286 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 13:14:47,286 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 13:14:47,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:47 BoogieIcfgContainer [2020-07-17 13:14:47,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 13:14:47,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 13:14:47,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 13:14:47,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 13:14:47,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 01:14:46" (1/3) ... [2020-07-17 13:14:47,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3495ac42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:47, skipping insertion in model container [2020-07-17 13:14:47,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:46" (2/3) ... [2020-07-17 13:14:47,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3495ac42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:47, skipping insertion in model container [2020-07-17 13:14:47,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:47" (3/3) ... [2020-07-17 13:14:47,300 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2020-07-17 13:14:47,311 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 13:14:47,320 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 13:14:47,336 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 13:14:47,366 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 13:14:47,366 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 13:14:47,367 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 13:14:47,367 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 13:14:47,367 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 13:14:47,367 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 13:14:47,367 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 13:14:47,367 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 13:14:47,389 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-17 13:14:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 13:14:47,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:47,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:47,409 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:47,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-07-17 13:14:47,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:47,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591844453] [2020-07-17 13:14:47,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:14:47,811 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:47,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591844453] [2020-07-17 13:14:47,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:47,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 13:14:47,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857907993] [2020-07-17 13:14:47,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 13:14:47,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:47,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 13:14:47,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 13:14:47,836 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 9 states. [2020-07-17 13:14:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:47,988 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-07-17 13:14:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 13:14:47,993 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-07-17 13:14:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:48,019 INFO L225 Difference]: With dead ends: 58 [2020-07-17 13:14:48,020 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 13:14:48,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 13:14:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 13:14:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-17 13:14:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 13:14:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-17 13:14:48,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-07-17 13:14:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:48,118 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-17 13:14:48,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 13:14:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-17 13:14:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 13:14:48,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:48,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:48,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 13:14:48,122 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:48,123 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-07-17 13:14:48,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:48,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592614547] [2020-07-17 13:14:48,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:14:48,251 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:48,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592614547] [2020-07-17 13:14:48,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:48,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 13:14:48,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726529165] [2020-07-17 13:14:48,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 13:14:48,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:48,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 13:14:48,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 13:14:48,255 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 9 states. [2020-07-17 13:14:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:48,330 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-17 13:14:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 13:14:48,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-07-17 13:14:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:48,333 INFO L225 Difference]: With dead ends: 50 [2020-07-17 13:14:48,333 INFO L226 Difference]: Without dead ends: 44 [2020-07-17 13:14:48,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 13:14:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-17 13:14:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-17 13:14:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 13:14:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-17 13:14:48,348 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-07-17 13:14:48,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:48,348 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-17 13:14:48,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 13:14:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-17 13:14:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 13:14:48,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:48,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-07-17 13:14:48,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 13:14:48,351 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:48,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:48,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-07-17 13:14:48,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:48,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159916320] [2020-07-17 13:14:48,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 13:14:48,675 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:48,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159916320] [2020-07-17 13:14:48,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:48,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-17 13:14:48,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825325198] [2020-07-17 13:14:48,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 13:14:48,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:48,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 13:14:48,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-07-17 13:14:48,682 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 15 states. [2020-07-17 13:14:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:49,004 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2020-07-17 13:14:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 13:14:49,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-07-17 13:14:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:49,007 INFO L225 Difference]: With dead ends: 81 [2020-07-17 13:14:49,007 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 13:14:49,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-07-17 13:14:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 13:14:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 13:14:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 13:14:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 13:14:49,012 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-07-17 13:14:49,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:49,012 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 13:14:49,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 13:14:49,013 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 13:14:49,013 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 13:14:49,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 13:14:49,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 13:14:49,346 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 13:14:49,346 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-17 13:14:49,346 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-17 13:14:49,347 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 13:14:49,347 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 13:14:49,347 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-17 13:14:49,347 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) the Hoare annotation is: false [2020-07-17 13:14:49,347 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-17 13:14:49,348 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 35 42) the Hoare annotation is: (<= 8 main_~x~0) [2020-07-17 13:14:49,348 INFO L264 CegarLoopResult]: At program point mainFINAL(lines 35 42) the Hoare annotation is: (<= 8 main_~x~0) [2020-07-17 13:14:49,348 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 0 (+ main_~result~0 2147483648)) (not (= 21 main_~result~0)) (<= 8 main_~x~0) (<= main_~result~0 2147483647)) [2020-07-17 13:14:49,348 INFO L264 CegarLoopResult]: At program point L38(lines 38 40) the Hoare annotation is: (and (<= 8 main_~x~0) (<= 0 (+ main_~result~0 2147483648)) (<= main_~result~0 2147483647)) [2020-07-17 13:14:49,348 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (<= 8 main_~x~0) [2020-07-17 13:14:49,349 INFO L264 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: (<= 8 main_~x~0) [2020-07-17 13:14:49,349 INFO L264 CegarLoopResult]: At program point L38-2(lines 38 40) the Hoare annotation is: (<= 8 main_~x~0) [2020-07-17 13:14:49,349 INFO L264 CegarLoopResult]: At program point L37-2(line 37) the Hoare annotation is: (and (<= 8 main_~x~0) (<= |main_#t~ret4| 2147483647) (<= 0 (+ |main_#t~ret4| 2147483648))) [2020-07-17 13:14:49,349 INFO L264 CegarLoopResult]: At program point L37-3(line 37) the Hoare annotation is: (and (<= 8 main_~x~0) (<= 0 (+ |main_#t~ret4| 2147483648)) (= |main_#t~ret4| main_~result~0) (<= |main_#t~ret4| 2147483647)) [2020-07-17 13:14:49,349 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-17 13:14:49,349 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,350 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,350 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,350 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,350 INFO L264 CegarLoopResult]: At program point L20(lines 20 24) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,350 INFO L264 CegarLoopResult]: At program point L23-3(line 23) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,350 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= |fibo2_#in~n| 0) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 13:14:49,351 INFO L264 CegarLoopResult]: At program point L23-4(line 23) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,351 INFO L264 CegarLoopResult]: At program point L18(lines 18 24) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,351 INFO L264 CegarLoopResult]: At program point L23-5(line 23) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,351 INFO L264 CegarLoopResult]: At program point L23-6(line 23) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,351 INFO L264 CegarLoopResult]: At program point fibo2FINAL(lines 17 25) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,351 INFO L264 CegarLoopResult]: At program point fibo2EXIT(lines 17 25) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-07-17 13:14:49,352 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-17 13:14:49,352 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 13:14:49,352 INFO L264 CegarLoopResult]: At program point L13-1(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 13:14:49,352 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= |fibo1_#in~n| 1) (< 0 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 13:14:49,352 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 13:14:49,353 INFO L264 CegarLoopResult]: At program point fibo1FINAL(lines 7 15) the Hoare annotation is: (= fibo1_~n |fibo1_#in~n|) [2020-07-17 13:14:49,353 INFO L264 CegarLoopResult]: At program point L10(lines 10 14) the Hoare annotation is: (and (< 0 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 13:14:49,353 INFO L264 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 13:14:49,353 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| 0)) [2020-07-17 13:14:49,353 INFO L264 CegarLoopResult]: At program point L13-4(line 13) the Hoare annotation is: (and (<= |fibo1_#t~ret1| 2147483647) (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|) (<= 0 (+ |fibo1_#t~ret1| 2147483648))) [2020-07-17 13:14:49,354 INFO L264 CegarLoopResult]: At program point L8(lines 8 14) the Hoare annotation is: (= fibo1_~n |fibo1_#in~n|) [2020-07-17 13:14:49,354 INFO L264 CegarLoopResult]: At program point L13-5(line 13) the Hoare annotation is: (and (<= |fibo1_#t~ret1| 2147483647) (= (+ |fibo1_#t~ret1| |fibo1_#t~ret0|) |fibo1_#res|) (< 1 fibo1_~n) (<= 0 (+ |fibo1_#t~ret1| 2147483648)) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 13:14:49,354 INFO L264 CegarLoopResult]: At program point L13-6(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (<= |fibo1_#t~ret0| (+ |fibo1_#res| 2147483648)) (= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#res| (+ |fibo1_#t~ret0| 2147483647))) [2020-07-17 13:14:49,354 INFO L264 CegarLoopResult]: At program point fibo1EXIT(lines 7 15) the Hoare annotation is: (= fibo1_~n |fibo1_#in~n|) [2020-07-17 13:14:49,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 01:14:49 BoogieIcfgContainer [2020-07-17 13:14:49,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 13:14:49,376 INFO L168 Benchmark]: Toolchain (without parser) took 2763.77 ms. Allocated memory was 143.7 MB in the beginning and 230.7 MB in the end (delta: 87.0 MB). Free memory was 100.4 MB in the beginning and 113.4 MB in the end (delta: -13.1 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:49,376 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 143.7 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-17 13:14:49,377 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.48 ms. Allocated memory is still 143.7 MB. Free memory was 99.9 MB in the beginning and 90.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:49,378 INFO L168 Benchmark]: Boogie Preprocessor took 37.14 ms. Allocated memory is still 143.7 MB. Free memory was 90.4 MB in the beginning and 89.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:49,379 INFO L168 Benchmark]: RCFGBuilder took 375.13 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 89.1 MB in the beginning and 165.9 MB in the end (delta: -76.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:49,381 INFO L168 Benchmark]: TraceAbstraction took 2080.70 ms. Allocated memory was 200.3 MB in the beginning and 230.7 MB in the end (delta: 30.4 MB). Free memory was 165.2 MB in the beginning and 113.4 MB in the end (delta: 51.8 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:49,385 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 143.7 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.48 ms. Allocated memory is still 143.7 MB. Free memory was 99.9 MB in the beginning and 90.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.14 ms. Allocated memory is still 143.7 MB. Free memory was 90.4 MB in the beginning and 89.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.13 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 89.1 MB in the beginning and 165.9 MB in the end (delta: -76.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2080.70 ms. Allocated memory was 200.3 MB in the beginning and 230.7 MB in the end (delta: 30.4 MB). Free memory was 165.2 MB in the beginning and 113.4 MB in the end (delta: 51.8 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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: 35]: Procedure Contract for main Derived contract for procedure main: 8 <= x - ProcedureContractResult [Line: 17]: Procedure Contract for fibo2 Derived contract for procedure fibo2: n == \old(n) - ProcedureContractResult [Line: 7]: Procedure Contract for fibo1 Derived contract for procedure fibo1: n == \old(n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 74 SDslu, 502 SDs, 0 SdLazy, 188 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 45 LocationsWithAnnotation, 143 PreInvPairs, 217 NumberOfFragments, 236 HoareAnnotationTreeSize, 143 FomulaSimplifications, 246 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 45 FomulaSimplificationsInter, 73 FormulaSimplificationTreeSizeReductionInter, 0.1s 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...