/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 00:48:53,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 00:48:53,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 00:48:54,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 00:48:54,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 00:48:54,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 00:48:54,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 00:48:54,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 00:48:54,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 00:48:54,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 00:48:54,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 00:48:54,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 00:48:54,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 00:48:54,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 00:48:54,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 00:48:54,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 00:48:54,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 00:48:54,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 00:48:54,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 00:48:54,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 00:48:54,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 00:48:54,093 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 00:48:54,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 00:48:54,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 00:48:54,116 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 00:48:54,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 00:48:54,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 00:48:54,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 00:48:54,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 00:48:54,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 00:48:54,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 00:48:54,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 00:48:54,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 00:48:54,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 00:48:54,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 00:48:54,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 00:48:54,120 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 00:48:54,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 00:48:54,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 00:48:54,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:48:54,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 00:48:54,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 00:48:54,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 00:48:54,122 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 00:48:54,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 00:48:54,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 00:48:54,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 00:48:54,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 00:48:54,681 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 00:48:54,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-10-24 00:48:54,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ece49f3/14d5a5201d91401eb8941c5a161ad2e2/FLAG6bd3fda63 [2020-10-24 00:48:55,469 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 00:48:55,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-10-24 00:48:55,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ece49f3/14d5a5201d91401eb8941c5a161ad2e2/FLAG6bd3fda63 [2020-10-24 00:48:55,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ece49f3/14d5a5201d91401eb8941c5a161ad2e2 [2020-10-24 00:48:55,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 00:48:55,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 00:48:55,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 00:48:55,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 00:48:55,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 00:48:55,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:48:55" (1/1) ... [2020-10-24 00:48:55,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e2f24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:55, skipping insertion in model container [2020-10-24 00:48:55,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:48:55" (1/1) ... [2020-10-24 00:48:55,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 00:48:55,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 00:48:56,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:48:56,091 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 00:48:56,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:48:56,134 INFO L208 MainTranslator]: Completed translation [2020-10-24 00:48:56,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:56 WrapperNode [2020-10-24 00:48:56,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 00:48:56,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 00:48:56,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 00:48:56,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 00:48:56,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:56" (1/1) ... [2020-10-24 00:48:56,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:56" (1/1) ... [2020-10-24 00:48:56,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:56" (1/1) ... [2020-10-24 00:48:56,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:56" (1/1) ... [2020-10-24 00:48:56,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:56" (1/1) ... [2020-10-24 00:48:56,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:56" (1/1) ... [2020-10-24 00:48:56,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:56" (1/1) ... [2020-10-24 00:48:56,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 00:48:56,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 00:48:56,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 00:48:56,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 00:48:56,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:56" (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 [2020-10-24 00:48:56,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 00:48:56,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 00:48:56,277 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 00:48:56,277 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-24 00:48:56,277 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-24 00:48:56,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 00:48:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 00:48:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 00:48:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 00:48:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 00:48:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 00:48:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-24 00:48:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-24 00:48:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 00:48:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 00:48:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 00:48:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 00:48:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 00:48:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 00:48:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 00:48:56,804 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 00:48:56,804 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 00:48:56,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:48:56 BoogieIcfgContainer [2020-10-24 00:48:56,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 00:48:56,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 00:48:56,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 00:48:56,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 00:48:56,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:48:55" (1/3) ... [2020-10-24 00:48:56,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d38a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:48:56, skipping insertion in model container [2020-10-24 00:48:56,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:48:56" (2/3) ... [2020-10-24 00:48:56,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d38a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:48:56, skipping insertion in model container [2020-10-24 00:48:56,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:48:56" (3/3) ... [2020-10-24 00:48:56,844 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-10-24 00:48:56,859 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 00:48:56,866 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 00:48:56,884 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 00:48:56,931 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 00:48:56,931 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 00:48:56,931 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 00:48:56,932 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 00:48:56,932 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 00:48:56,932 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 00:48:56,932 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 00:48:56,932 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 00:48:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-24 00:48:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-24 00:48:56,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:48:56,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:48:56,977 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:48:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:48:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash 775886402, now seen corresponding path program 1 times [2020-10-24 00:48:57,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:48:57,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126566848] [2020-10-24 00:48:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:48:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:57,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:48:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:57,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:48:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:48:57,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126566848] [2020-10-24 00:48:57,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:48:57,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 00:48:57,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128334468] [2020-10-24 00:48:57,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 00:48:57,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:48:57,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 00:48:57,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 00:48:57,460 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 6 states. [2020-10-24 00:48:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:48:57,917 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-24 00:48:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 00:48:57,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-24 00:48:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:48:57,930 INFO L225 Difference]: With dead ends: 71 [2020-10-24 00:48:57,930 INFO L226 Difference]: Without dead ends: 51 [2020-10-24 00:48:57,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-24 00:48:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-24 00:48:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-24 00:48:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 00:48:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-24 00:48:58,000 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 25 [2020-10-24 00:48:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:48:58,000 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-24 00:48:58,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 00:48:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-24 00:48:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-24 00:48:58,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:48:58,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:48:58,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 00:48:58,009 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:48:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:48:58,010 INFO L82 PathProgramCache]: Analyzing trace with hash 478831265, now seen corresponding path program 1 times [2020-10-24 00:48:58,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:48:58,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320017541] [2020-10-24 00:48:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:48:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:58,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:48:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:58,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:48:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:48:58,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320017541] [2020-10-24 00:48:58,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:48:58,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 00:48:58,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833575235] [2020-10-24 00:48:58,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 00:48:58,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:48:58,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 00:48:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 00:48:58,172 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 6 states. [2020-10-24 00:48:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:48:58,476 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-24 00:48:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 00:48:58,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-24 00:48:58,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:48:58,479 INFO L225 Difference]: With dead ends: 60 [2020-10-24 00:48:58,479 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 00:48:58,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-24 00:48:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 00:48:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-24 00:48:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 00:48:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-24 00:48:58,502 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 26 [2020-10-24 00:48:58,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:48:58,502 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-24 00:48:58,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 00:48:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-24 00:48:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 00:48:58,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:48:58,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:48:58,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 00:48:58,506 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:48:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:48:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash -708858972, now seen corresponding path program 1 times [2020-10-24 00:48:58,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:48:58,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360313869] [2020-10-24 00:48:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:48:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:58,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:48:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:58,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:48:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:58,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 00:48:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:58,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-24 00:48:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:48:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 00:48:58,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360313869] [2020-10-24 00:48:58,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:48:58,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 00:48:58,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606724027] [2020-10-24 00:48:58,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 00:48:58,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:48:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 00:48:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-24 00:48:58,769 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 8 states. [2020-10-24 00:48:59,039 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-24 00:48:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:48:59,354 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-10-24 00:48:59,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 00:48:59,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-24 00:48:59,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:48:59,357 INFO L225 Difference]: With dead ends: 92 [2020-10-24 00:48:59,357 INFO L226 Difference]: Without dead ends: 55 [2020-10-24 00:48:59,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-24 00:48:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-24 00:48:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-24 00:48:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-24 00:48:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-24 00:48:59,380 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 42 [2020-10-24 00:48:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:48:59,381 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-24 00:48:59,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 00:48:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-24 00:48:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 00:48:59,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:48:59,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:48:59,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 00:48:59,384 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:48:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:48:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1629720462, now seen corresponding path program 1 times [2020-10-24 00:48:59,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:48:59,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20380320] [2020-10-24 00:48:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:48:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:48:59,409 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:48:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:48:59,431 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:48:59,480 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 00:48:59,481 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 00:48:59,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 00:48:59,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:48:59 BoogieIcfgContainer [2020-10-24 00:48:59,550 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 00:48:59,553 INFO L168 Benchmark]: Toolchain (without parser) took 3700.83 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 131.7 MB in the beginning and 146.6 MB in the end (delta: -14.8 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. [2020-10-24 00:48:59,553 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory is still 103.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 00:48:59,555 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.48 ms. Allocated memory is still 155.2 MB. Free memory was 131.3 MB in the beginning and 122.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 00:48:59,556 INFO L168 Benchmark]: Boogie Preprocessor took 41.03 ms. Allocated memory is still 155.2 MB. Free memory was 122.0 MB in the beginning and 120.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 00:48:59,557 INFO L168 Benchmark]: RCFGBuilder took 629.98 ms. Allocated memory is still 155.2 MB. Free memory was 120.4 MB in the beginning and 105.1 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-24 00:48:59,558 INFO L168 Benchmark]: TraceAbstraction took 2716.19 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 138.4 MB in the beginning and 146.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 23.4 MB. Max. memory is 8.0 GB. [2020-10-24 00:48:59,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory is still 103.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 277.48 ms. Allocated memory is still 155.2 MB. Free memory was 131.3 MB in the beginning and 122.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.03 ms. Allocated memory is still 155.2 MB. Free memory was 122.0 MB in the beginning and 120.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 629.98 ms. Allocated memory is still 155.2 MB. Free memory was 120.4 MB in the beginning and 105.1 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2716.19 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 138.4 MB in the beginning and 146.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 23.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int x = 2; VAL [x=2] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L39] RET, EXPR fibo1(x) VAL [fibo1(x)=1, x=2] [L39] int result = fibo1(x); VAL [fibo1(x)=1, result=1, x=2] [L40] COND TRUE result == 1 VAL [result=1, x=2] [L41] CALL reach_error() [L4] __assert_fail("0", "fibo_2calls_2-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 143 SDtfs, 171 SDslu, 180 SDs, 0 SdLazy, 383 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred 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, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 6696 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...