/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:06:34,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:06:34,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:06:34,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:06:34,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:06:34,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:06:34,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:06:34,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:06:34,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:06:34,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:06:34,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:06:34,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:06:34,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:06:34,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:06:34,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:06:34,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:06:34,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:06:34,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:06:34,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:06:34,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:06:34,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:06:34,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:06:34,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:06:34,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:06:34,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:06:34,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:06:34,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:06:34,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:06:34,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:06:34,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:06:34,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:06:34,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:06:34,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:06:34,325 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:06:34,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:06:34,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:06:34,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:06:34,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:06:34,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:06:34,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:06:34,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:06:34,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:06:34,327 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:06:34,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:06:34,327 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:06:34,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:06:34,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:06:34,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:06:34,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:06:34,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:06:34,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:06:34,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:06:34,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:06:34,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:06:34,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:06:34,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:06:34,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:06:34,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:06:34,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:06:34,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:06:34,695 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:06:34,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:06:34,700 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:06:34,701 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:06:34,702 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-08-21 18:06:34,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d477da19/0b868e19099649d0ba4f412bb89045de/FLAG7adf0bb73 [2020-08-21 18:06:35,196 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:06:35,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-08-21 18:06:35,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d477da19/0b868e19099649d0ba4f412bb89045de/FLAG7adf0bb73 [2020-08-21 18:06:35,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d477da19/0b868e19099649d0ba4f412bb89045de [2020-08-21 18:06:35,622 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:06:35,624 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:06:35,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:06:35,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:06:35,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:06:35,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:06:35" (1/1) ... [2020-08-21 18:06:35,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ccd168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35, skipping insertion in model container [2020-08-21 18:06:35,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:06:35" (1/1) ... [2020-08-21 18:06:35,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:06:35,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:06:35,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:06:35,826 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:06:35,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:06:35,856 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:06:35,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35 WrapperNode [2020-08-21 18:06:35,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:06:35,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:06:35,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:06:35,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:06:35,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35" (1/1) ... [2020-08-21 18:06:35,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35" (1/1) ... [2020-08-21 18:06:35,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35" (1/1) ... [2020-08-21 18:06:35,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35" (1/1) ... [2020-08-21 18:06:36,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35" (1/1) ... [2020-08-21 18:06:36,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35" (1/1) ... [2020-08-21 18:06:36,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35" (1/1) ... [2020-08-21 18:06:36,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:06:36,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:06:36,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:06:36,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:06:36,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 18:06:36,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:06:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:06:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-21 18:06:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:06:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:06:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-21 18:06:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:06:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:06:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:06:36,305 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:06:36,305 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:06:36,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:06:36 BoogieIcfgContainer [2020-08-21 18:06:36,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:06:36,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:06:36,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:06:36,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:06:36,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:06:35" (1/3) ... [2020-08-21 18:06:36,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581b2d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:06:36, skipping insertion in model container [2020-08-21 18:06:36,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:35" (2/3) ... [2020-08-21 18:06:36,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581b2d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:06:36, skipping insertion in model container [2020-08-21 18:06:36,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:06:36" (3/3) ... [2020-08-21 18:06:36,323 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2020-08-21 18:06:36,334 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:06:36,343 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:06:36,360 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:06:36,401 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:06:36,401 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:06:36,402 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:06:36,403 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:06:36,403 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:06:36,403 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:06:36,403 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:06:36,403 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:06:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-08-21 18:06:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 18:06:36,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:36,437 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:36,437 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:36,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1715138264, now seen corresponding path program 1 times [2020-08-21 18:06:36,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:36,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695342977] [2020-08-21 18:06:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:06:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 18:06:36,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695342977] [2020-08-21 18:06:36,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:36,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 18:06:36,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429314595] [2020-08-21 18:06:36,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:06:36,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:36,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:06:36,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:06:36,698 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-08-21 18:06:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:36,790 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-08-21 18:06:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:06:36,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-21 18:06:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:36,800 INFO L225 Difference]: With dead ends: 24 [2020-08-21 18:06:36,801 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:06:36,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:06:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:06:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:06:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:06:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:06:36,856 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-08-21 18:06:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:36,856 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:06:36,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:06:36,859 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:06:36,859 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:06:36,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:06:36,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:06:36,957 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:06:36,957 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:06:36,957 INFO L268 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-08-21 18:06:36,957 INFO L268 CegarLoopResult]: For program point fEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-21 18:06:36,958 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-08-21 18:06:36,958 INFO L271 CegarLoopResult]: At program point fENTRY(lines 3 8) the Hoare annotation is: true [2020-08-21 18:06:36,958 INFO L268 CegarLoopResult]: For program point L6-1(lines 3 8) no Hoare annotation was computed. [2020-08-21 18:06:36,958 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 18:06:36,958 INFO L268 CegarLoopResult]: For program point fFINAL(lines 3 8) no Hoare annotation was computed. [2020-08-21 18:06:36,959 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:06:36,959 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:06:36,959 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:06:36,959 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:06:36,959 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 12) the Hoare annotation is: true [2020-08-21 18:06:36,959 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 12) no Hoare annotation was computed. [2020-08-21 18:06:36,960 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 12) no Hoare annotation was computed. [2020-08-21 18:06:36,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:06:36 BoogieIcfgContainer [2020-08-21 18:06:36,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:06:36,969 INFO L168 Benchmark]: Toolchain (without parser) took 1343.78 ms. Allocated memory was 140.5 MB in the beginning and 207.6 MB in the end (delta: 67.1 MB). Free memory was 102.3 MB in the beginning and 150.9 MB in the end (delta: -48.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:06:36,971 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 18:06:36,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.84 ms. Allocated memory is still 140.5 MB. Free memory was 102.1 MB in the beginning and 92.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:06:36,973 INFO L168 Benchmark]: Boogie Preprocessor took 181.41 ms. Allocated memory was 140.5 MB in the beginning and 207.6 MB in the end (delta: 67.1 MB). Free memory was 92.9 MB in the beginning and 186.8 MB in the end (delta: -93.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:06:36,974 INFO L168 Benchmark]: RCFGBuilder took 272.50 ms. Allocated memory is still 207.6 MB. Free memory was 186.8 MB in the beginning and 175.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:06:36,975 INFO L168 Benchmark]: TraceAbstraction took 652.82 ms. Allocated memory is still 207.6 MB. Free memory was 175.2 MB in the beginning and 150.9 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:06:36,980 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.84 ms. Allocated memory is still 140.5 MB. Free memory was 102.1 MB in the beginning and 92.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 181.41 ms. Allocated memory was 140.5 MB in the beginning and 207.6 MB in the end (delta: 67.1 MB). Free memory was 92.9 MB in the beginning and 186.8 MB in the end (delta: -93.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 272.50 ms. Allocated memory is still 207.6 MB. Free memory was 186.8 MB in the beginning and 175.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 652.82 ms. Allocated memory is still 207.6 MB. Free memory was 175.2 MB in the beginning and 150.9 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 5 SDslu, 15 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 8 PreInvPairs, 8 NumberOfFragments, 9 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 285 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 3/7 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...