/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:05:04,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:05:04,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:05:04,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:05:04,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:05:04,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:05:04,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:05:04,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:05:04,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:05:04,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:05:04,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:05:04,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:05:04,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:05:04,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:05:04,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:05:04,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:05:04,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:05:04,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:05:04,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:05:04,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:05:04,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:05:04,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:05:04,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:05:04,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:05:04,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:05:04,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:05:04,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:05:04,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:05:04,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:05:04,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:05:04,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:05:04,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:05:04,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:05:04,428 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:05:04,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:05:04,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:05:04,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:05:04,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:05:04,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:05:04,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:05:04,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:05:04,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:05:04,445 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:05:04,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:05:04,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:05:04,447 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:05:04,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:05:04,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:05:04,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:05:04,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:05:04,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:05:04,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:05:04,449 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:05:04,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:05:04,449 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:05:04,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:05:04,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:05:04,450 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:05:04,450 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:05:04,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:05:04,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:05:04,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:05:04,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:05:04,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:05:04,452 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 22:05:04,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:05:04,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:05:04,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:05:04,825 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:05:04,826 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:05:04,827 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-08-22 22:05:04,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7b1e100/1d733860bceb4b158bdc962aceabb3ad/FLAG5aac35f1e [2020-08-22 22:05:05,400 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:05:05,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-08-22 22:05:05,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7b1e100/1d733860bceb4b158bdc962aceabb3ad/FLAG5aac35f1e [2020-08-22 22:05:05,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7b1e100/1d733860bceb4b158bdc962aceabb3ad [2020-08-22 22:05:05,732 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:05:05,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:05:05,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:05:05,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:05:05,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:05:05,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:05:05" (1/1) ... [2020-08-22 22:05:05,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559d5a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:05, skipping insertion in model container [2020-08-22 22:05:05,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:05:05" (1/1) ... [2020-08-22 22:05:05,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:05:05,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:05:06,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:05:06,044 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:05:06,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:05:06,077 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:05:06,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:06 WrapperNode [2020-08-22 22:05:06,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:05:06,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:05:06,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:05:06,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:05:06,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:06" (1/1) ... [2020-08-22 22:05:06,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:06" (1/1) ... [2020-08-22 22:05:06,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:06" (1/1) ... [2020-08-22 22:05:06,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:06" (1/1) ... [2020-08-22 22:05:06,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:06" (1/1) ... [2020-08-22 22:05:06,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:06" (1/1) ... [2020-08-22 22:05:06,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:06" (1/1) ... [2020-08-22 22:05:06,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:05:06,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:05:06,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:05:06,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:05:06,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:05:06,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:05:06,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:05:06,314 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-22 22:05:06,314 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-22 22:05:06,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:05:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:05:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:05:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-22 22:05:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-22 22:05:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:05:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:05:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:05:06,574 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:05:06,575 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:05:06,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:05:06 BoogieIcfgContainer [2020-08-22 22:05:06,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:05:06,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:05:06,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:05:06,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:05:06,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:05:05" (1/3) ... [2020-08-22 22:05:06,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672154dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:05:06, skipping insertion in model container [2020-08-22 22:05:06,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:05:06" (2/3) ... [2020-08-22 22:05:06,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672154dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:05:06, skipping insertion in model container [2020-08-22 22:05:06,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:05:06" (3/3) ... [2020-08-22 22:05:06,626 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-08-22 22:05:06,643 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:05:06,654 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:05:06,673 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:05:06,703 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:05:06,704 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:05:06,704 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:05:06,704 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:05:06,705 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:05:06,705 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:05:06,705 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:05:06,705 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:05:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-08-22 22:05:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 22:05:06,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:05:06,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:05:06,744 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:05:06,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:05:06,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-08-22 22:05:06,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:05:06,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935169346] [2020-08-22 22:05:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:05:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:06,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:05:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:06,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:05:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:05:07,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935169346] [2020-08-22 22:05:07,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:05:07,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:05:07,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513295309] [2020-08-22 22:05:07,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:05:07,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:05:07,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:05:07,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:05:07,080 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-08-22 22:05:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:05:07,230 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-08-22 22:05:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:05:07,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 22:05:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:05:07,248 INFO L225 Difference]: With dead ends: 58 [2020-08-22 22:05:07,248 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 22:05:07,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:05:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 22:05:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 22:05:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 22:05:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-08-22 22:05:07,313 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-08-22 22:05:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:05:07,314 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-08-22 22:05:07,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:05:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-08-22 22:05:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 22:05:07,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:05:07,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:05:07,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:05:07,318 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:05:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:05:07,319 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-08-22 22:05:07,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:05:07,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914059877] [2020-08-22 22:05:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:05:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:07,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:05:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:07,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:05:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:05:07,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914059877] [2020-08-22 22:05:07,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:05:07,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:05:07,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134845393] [2020-08-22 22:05:07,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:05:07,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:05:07,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:05:07,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:05:07,404 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-08-22 22:05:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:05:07,499 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-22 22:05:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:05:07,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-22 22:05:07,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:05:07,502 INFO L225 Difference]: With dead ends: 50 [2020-08-22 22:05:07,503 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 22:05:07,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:05:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 22:05:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 22:05:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 22:05:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-08-22 22:05:07,525 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-08-22 22:05:07,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:05:07,525 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-08-22 22:05:07,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:05:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-08-22 22:05:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 22:05:07,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:05:07,529 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] [2020-08-22 22:05:07,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:05:07,530 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:05:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:05:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-08-22 22:05:07,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:05:07,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961683299] [2020-08-22 22:05:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:05:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:07,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:05:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:07,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:05:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:07,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:05:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:07,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 22:05:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:05:07,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961683299] [2020-08-22 22:05:07,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:05:07,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:05:07,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033340750] [2020-08-22 22:05:07,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:05:07,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:05:07,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:05:07,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:05:07,724 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-08-22 22:05:07,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:05:07,917 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-08-22 22:05:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:05:07,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-22 22:05:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:05:07,920 INFO L225 Difference]: With dead ends: 82 [2020-08-22 22:05:07,921 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 22:05:07,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:05:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 22:05:07,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-22 22:05:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-22 22:05:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-08-22 22:05:07,941 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-08-22 22:05:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:05:07,941 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-08-22 22:05:07,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:05:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-08-22 22:05:07,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:05:07,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:05:07,945 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-08-22 22:05:07,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:05:07,945 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:05:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:05:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-08-22 22:05:07,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:05:07,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214081371] [2020-08-22 22:05:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:05:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:05:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:05:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:05:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:05:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:05:08,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214081371] [2020-08-22 22:05:08,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:05:08,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:05:08,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653780667] [2020-08-22 22:05:08,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:05:08,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:05:08,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:05:08,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:05:08,224 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 9 states. [2020-08-22 22:05:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:05:08,450 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-08-22 22:05:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:05:08,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-08-22 22:05:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:05:08,453 INFO L225 Difference]: With dead ends: 66 [2020-08-22 22:05:08,454 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 22:05:08,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:05:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 22:05:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2020-08-22 22:05:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 22:05:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-08-22 22:05:08,473 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 34 [2020-08-22 22:05:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:05:08,473 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-08-22 22:05:08,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:05:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-08-22 22:05:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 22:05:08,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:05:08,476 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-08-22 22:05:08,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:05:08,476 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:05:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:05:08,477 INFO L82 PathProgramCache]: Analyzing trace with hash 186293384, now seen corresponding path program 1 times [2020-08-22 22:05:08,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:05:08,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209715719] [2020-08-22 22:05:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:05:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:05:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:05:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:05:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:05:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:05:08,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209715719] [2020-08-22 22:05:08,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:05:08,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:05:08,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618158812] [2020-08-22 22:05:08,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:05:08,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:05:08,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:05:08,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:05:08,572 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 7 states. [2020-08-22 22:05:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:05:08,717 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2020-08-22 22:05:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:05:08,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-08-22 22:05:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:05:08,720 INFO L225 Difference]: With dead ends: 101 [2020-08-22 22:05:08,720 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 22:05:08,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:05:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 22:05:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 22:05:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 22:05:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-08-22 22:05:08,737 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 35 [2020-08-22 22:05:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:05:08,738 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-08-22 22:05:08,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:05:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-08-22 22:05:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 22:05:08,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:05:08,741 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:05:08,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:05:08,741 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:05:08,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:05:08,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1875452576, now seen corresponding path program 1 times [2020-08-22 22:05:08,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:05:08,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713462789] [2020-08-22 22:05:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:05:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:05:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:05:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:05:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:05:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 22:05:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 22:05:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 22:05:08,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713462789] [2020-08-22 22:05:08,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:05:08,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:05:08,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144961922] [2020-08-22 22:05:08,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:05:08,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:05:08,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:05:08,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:05:08,916 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 7 states. [2020-08-22 22:05:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:05:09,002 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-08-22 22:05:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:05:09,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-08-22 22:05:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:05:09,005 INFO L225 Difference]: With dead ends: 104 [2020-08-22 22:05:09,005 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 22:05:09,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:05:09,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 22:05:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-22 22:05:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 22:05:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-08-22 22:05:09,020 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 50 [2020-08-22 22:05:09,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:05:09,020 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-08-22 22:05:09,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:05:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-08-22 22:05:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 22:05:09,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:05:09,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:05:09,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:05:09,024 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:05:09,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:05:09,025 INFO L82 PathProgramCache]: Analyzing trace with hash 104828256, now seen corresponding path program 1 times [2020-08-22 22:05:09,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:05:09,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294100013] [2020-08-22 22:05:09,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:05:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:05:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:05:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:05:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:05:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 22:05:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:05:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:05:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 22:05:09,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294100013] [2020-08-22 22:05:09,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:05:09,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:05:09,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135264971] [2020-08-22 22:05:09,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:05:09,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:05:09,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:05:09,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:05:09,182 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 8 states. [2020-08-22 22:05:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:05:09,345 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-08-22 22:05:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:05:09,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-22 22:05:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:05:09,347 INFO L225 Difference]: With dead ends: 56 [2020-08-22 22:05:09,347 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 22:05:09,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:05:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 22:05:09,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 22:05:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 22:05:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 22:05:09,351 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-08-22 22:05:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:05:09,351 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 22:05:09,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:05:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 22:05:09,352 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 22:05:09,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:05:09,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 22:05:09,868 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-08-22 22:05:10,619 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:05:10,620 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:05:10,620 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:05:10,620 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 22:05:10,621 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 22:05:10,621 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:05:10,621 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) the Hoare annotation is: false [2020-08-22 22:05:10,622 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-22 22:05:10,622 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 35 42) the Hoare annotation is: (<= 2 main_~x~0) [2020-08-22 22:05:10,623 INFO L264 CegarLoopResult]: At program point mainFINAL(lines 35 42) the Hoare annotation is: (<= 2 main_~x~0) [2020-08-22 22:05:10,624 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: false [2020-08-22 22:05:10,624 INFO L264 CegarLoopResult]: At program point L38(lines 38 40) the Hoare annotation is: (and (<= 2 main_~x~0) (<= main_~result~0 1) (< 0 main_~result~0)) [2020-08-22 22:05:10,624 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= main_~x~0 2)) [2020-08-22 22:05:10,626 INFO L264 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= 1 |main_#t~ret4|) (<= |main_#t~ret4| 1)) [2020-08-22 22:05:10,626 INFO L264 CegarLoopResult]: At program point L38-2(lines 38 40) the Hoare annotation is: (<= 2 main_~x~0) [2020-08-22 22:05:10,628 INFO L264 CegarLoopResult]: At program point L37-2(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= 1 |main_#t~ret4|) (<= |main_#t~ret4| 1)) [2020-08-22 22:05:10,629 INFO L264 CegarLoopResult]: At program point L37-3(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= main_~result~0 1) (<= 1 |main_#t~ret4|) (<= |main_#t~ret4| 1) (< 0 main_~result~0)) [2020-08-22 22:05:10,629 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-22 22:05:10,630 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-22 22:05:10,632 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-22 22:05:10,632 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| 1) (< 0 fibo2_~n)) [2020-08-22 22:05:10,633 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-22 22:05:10,633 INFO L264 CegarLoopResult]: At program point L20(lines 20 24) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 0 fibo2_~n)) [2020-08-22 22:05:10,634 INFO L264 CegarLoopResult]: At program point L23-3(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-22 22:05:10,634 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| 0)) [2020-08-22 22:05:10,634 INFO L264 CegarLoopResult]: At program point L23-4(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-22 22:05:10,634 INFO L264 CegarLoopResult]: At program point L18(lines 18 24) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2020-08-22 22:05:10,634 INFO L264 CegarLoopResult]: At program point L23-5(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-22 22:05:10,635 INFO L264 CegarLoopResult]: At program point L23-6(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-22 22:05:10,635 INFO L264 CegarLoopResult]: At program point fibo2FINAL(lines 17 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (or (and (<= 1 |fibo2_#in~n|) (<= 1 |fibo2_#res|) (<= |fibo2_#res| 1)) (and (<= |fibo2_#res| 0) (<= 0 |fibo2_#res|) (<= |fibo2_#in~n| 0)) (not (<= |fibo2_#in~n| 1)))) [2020-08-22 22:05:10,635 INFO L264 CegarLoopResult]: At program point fibo2EXIT(lines 17 25) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= 1 |fibo2_#res|) (<= |fibo2_#res| 1) .cse0) (and .cse0 (<= 2 |fibo2_#in~n|)) (and .cse0 (<= |fibo2_#in~n| 0)))) (or (<= 1 |fibo2_#in~n|) (and (<= |fibo2_#res| 0) (<= 0 |fibo2_#res|)))) [2020-08-22 22:05:10,636 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-22 22:05:10,636 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-08-22 22:05:10,637 INFO L264 CegarLoopResult]: At program point L13-1(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= |fibo1_#t~ret0| 1) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse0))) [2020-08-22 22:05:10,637 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= |fibo1_#in~n| 1) (= fibo1_~n |fibo1_#in~n|) (< 0 fibo1_~n)) [2020-08-22 22:05:10,637 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= |fibo1_#t~ret0| 1) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse0))) [2020-08-22 22:05:10,638 INFO L264 CegarLoopResult]: At program point fibo1FINAL(lines 7 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and .cse0 (<= |fibo1_#res| 1) (<= 1 |fibo1_#res|)) (and (<= |fibo1_#in~n| 1) .cse0))) [2020-08-22 22:05:10,638 INFO L264 CegarLoopResult]: At program point L10(lines 10 14) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (< 0 fibo1_~n)) [2020-08-22 22:05:10,643 INFO L264 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: (let ((.cse1 (= fibo1_~n |fibo1_#in~n|))) (or (let ((.cse0 (+ |fibo1_#t~ret1| |fibo1_#t~ret0|))) (and (<= .cse0 1) (<= |fibo1_#t~ret0| 1) (<= 1 .cse0) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse1)) (and .cse1 (<= 3 |fibo1_#in~n|)))) [2020-08-22 22:05:10,643 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (and (<= |fibo1_#in~n| 0) (= fibo1_~n |fibo1_#in~n|)) [2020-08-22 22:05:10,644 INFO L264 CegarLoopResult]: At program point L13-4(line 13) the Hoare annotation is: (let ((.cse1 (= fibo1_~n |fibo1_#in~n|))) (or (let ((.cse0 (+ |fibo1_#t~ret1| |fibo1_#t~ret0|))) (and (<= .cse0 1) (<= |fibo1_#t~ret0| 1) (<= 1 .cse0) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse1)) (and .cse1 (<= 3 |fibo1_#in~n|)))) [2020-08-22 22:05:10,644 INFO L264 CegarLoopResult]: At program point L8(lines 8 14) the Hoare annotation is: (= fibo1_~n |fibo1_#in~n|) [2020-08-22 22:05:10,644 INFO L264 CegarLoopResult]: At program point L13-5(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (let ((.cse1 (+ |fibo1_#t~ret1| |fibo1_#t~ret0|))) (and (<= .cse1 1) (<= |fibo1_#t~ret0| 1) (<= 1 .cse1) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse0 (<= |fibo1_#res| 1) (<= 1 |fibo1_#res|))))) [2020-08-22 22:05:10,645 INFO L264 CegarLoopResult]: At program point L13-6(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= |fibo1_#t~ret0| 1) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse0 (<= |fibo1_#res| 1) (<= 1 |fibo1_#res|)))) [2020-08-22 22:05:10,647 INFO L264 CegarLoopResult]: At program point fibo1EXIT(lines 7 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and .cse0 (<= |fibo1_#res| 1) (<= 1 |fibo1_#res|)) (and (<= |fibo1_#in~n| 1) .cse0))) [2020-08-22 22:05:10,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:05:10 BoogieIcfgContainer [2020-08-22 22:05:10,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:05:10,695 INFO L168 Benchmark]: Toolchain (without parser) took 4960.95 ms. Allocated memory was 142.1 MB in the beginning and 251.7 MB in the end (delta: 109.6 MB). Free memory was 102.1 MB in the beginning and 184.4 MB in the end (delta: -82.3 MB). Peak memory consumption was 119.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:05:10,696 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 22:05:10,697 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.07 ms. Allocated memory is still 142.1 MB. Free memory was 101.9 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 22:05:10,698 INFO L168 Benchmark]: Boogie Preprocessor took 151.02 ms. Allocated memory was 142.1 MB in the beginning and 202.4 MB in the end (delta: 60.3 MB). Free memory was 92.2 MB in the beginning and 180.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:05:10,699 INFO L168 Benchmark]: RCFGBuilder took 351.99 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 166.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:05:10,700 INFO L168 Benchmark]: TraceAbstraction took 4097.96 ms. Allocated memory was 202.4 MB in the beginning and 251.7 MB in the end (delta: 49.3 MB). Free memory was 165.3 MB in the beginning and 184.4 MB in the end (delta: -19.1 MB). Peak memory consumption was 122.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:05:10,704 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 343.07 ms. Allocated memory is still 142.1 MB. Free memory was 101.9 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 151.02 ms. Allocated memory was 142.1 MB in the beginning and 202.4 MB in the end (delta: 60.3 MB). Free memory was 92.2 MB in the beginning and 180.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.99 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 166.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4097.96 ms. Allocated memory was 202.4 MB in the beginning and 251.7 MB in the end (delta: 49.3 MB). Free memory was 165.3 MB in the beginning and 184.4 MB in the end (delta: -19.1 MB). Peak memory consumption was 122.1 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: 2 <= x - ProcedureContractResult [Line: 17]: Procedure Contract for fibo2 Derived contract for procedure fibo2: ((((1 <= \result && \result <= 1) && n == \old(n)) || (n == \old(n) && 2 <= \old(n))) || (n == \old(n) && \old(n) <= 0)) && (1 <= \old(n) || (\result <= 0 && 0 <= \result)) - ProcedureContractResult [Line: 7]: Procedure Contract for fibo1 Derived contract for procedure fibo1: ((n == \old(n) && 3 <= \old(n)) || ((n == \old(n) && \result <= 1) && 1 <= \result)) || (\old(n) <= 1 && n == \old(n)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 294 SDtfs, 177 SDslu, 1053 SDs, 0 SdLazy, 372 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=6, 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, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 45 LocationsWithAnnotation, 297 PreInvPairs, 434 NumberOfFragments, 474 HoareAnnotationTreeSize, 297 FomulaSimplifications, 2056 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 45 FomulaSimplificationsInter, 655 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 236 NumberOfCodeBlocks, 236 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 229 ConstructedInterpolants, 0 QuantifiedInterpolants, 16943 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 27/49 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...