/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:03:48,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:03:48,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:03:48,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:03:48,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:03:48,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:03:48,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:03:48,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:03:48,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:03:48,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:03:48,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:03:48,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:03:48,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:03:48,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:03:48,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:03:48,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:03:48,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:03:48,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:03:48,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:03:48,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:03:48,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:03:48,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:03:48,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:03:48,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:03:48,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 13:03:48,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 13:03:48,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 13:03:48,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 13:03:48,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 13:03:48,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 13:03:48,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 13:03:48,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 13:03:48,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 13:03:48,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 13:03:48,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 13:03:48,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 13:03:48,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 13:03:48,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 13:03:48,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:03:48,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:03:48,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:03:48,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:03:48,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:03:48,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:03:48,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:03:48,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:03:48,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:03:48,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:03:48,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:03:48,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:03:48,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:03:48,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:03:48,257 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:03:48,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:03:48,257 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:03:48,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:03:48,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:03:48,258 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:03:48,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:03:48,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:03:48,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:03:48,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:03:48,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:03:48,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:03:48,259 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:03:48,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:03:48,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:03:48,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:03:48,546 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:03:48,546 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:03:48,546 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c [2020-07-07 13:03:48,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04929b8bc/b8fb1c963ad747dc9d66ee7bbddec536/FLAG074ddb9b0 [2020-07-07 13:03:49,065 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:03:49,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c [2020-07-07 13:03:49,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04929b8bc/b8fb1c963ad747dc9d66ee7bbddec536/FLAG074ddb9b0 [2020-07-07 13:03:49,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04929b8bc/b8fb1c963ad747dc9d66ee7bbddec536 [2020-07-07 13:03:49,437 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:03:49,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:03:49,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:49,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:03:49,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:03:49,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:49" (1/1) ... [2020-07-07 13:03:49,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679e04b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49, skipping insertion in model container [2020-07-07 13:03:49,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:03:49" (1/1) ... [2020-07-07 13:03:49,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:03:49,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:03:49,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:49,620 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:03:49,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:03:49,651 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:03:49,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49 WrapperNode [2020-07-07 13:03:49,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:03:49,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:03:49,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:03:49,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:03:49,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49" (1/1) ... [2020-07-07 13:03:49,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49" (1/1) ... [2020-07-07 13:03:49,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49" (1/1) ... [2020-07-07 13:03:49,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49" (1/1) ... [2020-07-07 13:03:49,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49" (1/1) ... [2020-07-07 13:03:49,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49" (1/1) ... [2020-07-07 13:03:49,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49" (1/1) ... [2020-07-07 13:03:49,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:03:49,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:03:49,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:03:49,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:03:49,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:03:49,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:03:49,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:03:49,817 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-07 13:03:49,817 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2020-07-07 13:03:49,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:03:49,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:03:49,818 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-07 13:03:49,818 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2020-07-07 13:03:49,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:03:49,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:03:49,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:03:49,971 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:03:49,971 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:03:49,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:49 BoogieIcfgContainer [2020-07-07 13:03:49,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:03:49,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:03:49,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:03:49,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:03:49,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:03:49" (1/3) ... [2020-07-07 13:03:49,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f486258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:49, skipping insertion in model container [2020-07-07 13:03:49,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:03:49" (2/3) ... [2020-07-07 13:03:49,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f486258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:03:49, skipping insertion in model container [2020-07-07 13:03:49,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:03:49" (3/3) ... [2020-07-07 13:03:49,983 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c [2020-07-07 13:03:49,994 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:03:50,000 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-07 13:03:50,014 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-07 13:03:50,034 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:03:50,034 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:03:50,035 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:03:50,035 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:03:50,035 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:03:50,035 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:03:50,035 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:03:50,035 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:03:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-07 13:03:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:03:50,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:50,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:50,059 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:50,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1612791331, now seen corresponding path program 1 times [2020-07-07 13:03:50,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:50,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640696537] [2020-07-07 13:03:50,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:03:50,406 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:50,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640696537] [2020-07-07 13:03:50,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:50,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:03:50,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294184796] [2020-07-07 13:03:50,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:03:50,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:50,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:03:50,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:03:50,433 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 8 states. [2020-07-07 13:03:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:50,630 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-07-07 13:03:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:03:50,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-07-07 13:03:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:50,642 INFO L225 Difference]: With dead ends: 43 [2020-07-07 13:03:50,642 INFO L226 Difference]: Without dead ends: 31 [2020-07-07 13:03:50,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-07 13:03:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-07 13:03:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-07 13:03:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-07 13:03:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-07-07 13:03:50,695 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 16 [2020-07-07 13:03:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:50,696 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-07-07 13:03:50,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:03:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-07-07 13:03:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 13:03:50,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:50,698 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:50,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:03:50,699 INFO L427 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash 107301256, now seen corresponding path program 1 times [2020-07-07 13:03:50,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:50,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468116131] [2020-07-07 13:03:50,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 Garbage collection #2: 23 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 23 to 43 Garbage collection #3: 43 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 43 to 83 [2020-07-07 13:03:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:03:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:03:50,809 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:50,812 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:03:50,813 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:03:50,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:03:50,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:03:50 BoogieIcfgContainer [2020-07-07 13:03:50,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:03:50,840 INFO L168 Benchmark]: Toolchain (without parser) took 1400.32 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 103.1 MB in the beginning and 123.7 MB in the end (delta: -20.6 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:50,842 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.3 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-07 13:03:50,844 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.47 ms. Allocated memory is still 146.3 MB. Free memory was 102.9 MB in the beginning and 93.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:50,846 INFO L168 Benchmark]: Boogie Preprocessor took 23.85 ms. Allocated memory is still 146.3 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:50,847 INFO L168 Benchmark]: RCFGBuilder took 299.00 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 92.5 MB in the beginning and 171.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:50,849 INFO L168 Benchmark]: TraceAbstraction took 860.62 ms. Allocated memory is still 202.9 MB. Free memory was 171.1 MB in the beginning and 123.7 MB in the end (delta: 47.5 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:03:50,860 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.3 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 209.47 ms. Allocated memory is still 146.3 MB. Free memory was 102.9 MB in the beginning and 93.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.85 ms. Allocated memory is still 146.3 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 299.00 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 92.5 MB in the beginning and 171.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 860.62 ms. Allocated memory is still 202.9 MB. Free memory was 171.1 MB in the beginning and 123.7 MB in the end (delta: 47.5 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] CALL f(4) [L7] COND FALSE !(n<3) [L8] n-- [L9] CALL f2(n) [L14] COND FALSE !(n<3) [L15] n-- [L16] CALL f(n) [L7] COND TRUE n<3 [L16] RET f(n) [L17] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 11 SDslu, 92 SDs, 0 SdLazy, 56 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=1, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...