/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-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:13:28,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:13:28,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:13:28,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:13:28,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:13:28,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:13:28,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:13:28,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:13:28,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:13:28,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:13:28,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:13:28,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:13:28,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:13:28,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:13:28,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:13:28,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:13:28,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:13:28,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:13:28,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:13:28,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:13:28,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:13:28,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:13:28,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:13:28,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:13:28,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:13:28,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:13:28,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:13:28,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:13:28,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:13:28,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-04 16:13:28,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:13:28,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:13:28,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:13:28,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:13:28,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:13:28,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:13:28,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:13:28,341 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:13:28,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:13:28,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:13:28,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:13:28,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:13:28,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:13:28,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:13:28,344 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:13:28,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:13:28,344 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:13:28,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:13:28,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:13:28,345 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:13:28,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:13:28,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:13:28,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:13:28,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:13:28,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:13:28,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:13:28,346 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:13:28,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:13:28,789 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:13:28,793 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:13:28,794 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:13:28,795 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:13:28,796 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-1.c [2020-09-04 16:13:28,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e62248e1/a9cb248ed3054d7c99eebf32b0b94baf/FLAG2eda1f5cf [2020-09-04 16:13:29,486 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:13:29,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec-1.c [2020-09-04 16:13:29,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e62248e1/a9cb248ed3054d7c99eebf32b0b94baf/FLAG2eda1f5cf [2020-09-04 16:13:29,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e62248e1/a9cb248ed3054d7c99eebf32b0b94baf [2020-09-04 16:13:29,843 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:13:29,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:13:29,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:13:29,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:13:29,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:13:29,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:13:29" (1/1) ... [2020-09-04 16:13:29,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a405b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:29, skipping insertion in model container [2020-09-04 16:13:29,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:13:29" (1/1) ... [2020-09-04 16:13:29,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:13:29,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:13:30,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:13:30,098 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:13:30,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:13:30,129 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:13:30,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:30 WrapperNode [2020-09-04 16:13:30,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:13:30,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:13:30,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:13:30,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:13:30,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:30" (1/1) ... [2020-09-04 16:13:30,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:30" (1/1) ... [2020-09-04 16:13:30,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:30" (1/1) ... [2020-09-04 16:13:30,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:30" (1/1) ... [2020-09-04 16:13:30,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:30" (1/1) ... [2020-09-04 16:13:30,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:30" (1/1) ... [2020-09-04 16:13:30,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:30" (1/1) ... [2020-09-04 16:13:30,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:13:30,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:13:30,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:13:30,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:13:30,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:30" (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 [2020-09-04 16:13:30,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:13:30,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:13:30,324 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-04 16:13:30,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:13:30,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:13:30,325 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-04 16:13:30,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:13:30,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:13:30,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:13:30,491 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:13:30,491 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:13:30,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:13:30 BoogieIcfgContainer [2020-09-04 16:13:30,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:13:30,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:13:30,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:13:30,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:13:30,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:13:29" (1/3) ... [2020-09-04 16:13:30,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530aeaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:13:30, skipping insertion in model container [2020-09-04 16:13:30,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:30" (2/3) ... [2020-09-04 16:13:30,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530aeaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:13:30, skipping insertion in model container [2020-09-04 16:13:30,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:13:30" (3/3) ... [2020-09-04 16:13:30,506 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2020-09-04 16:13:30,517 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:13:30,528 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:13:30,550 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:13:30,578 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:13:30,578 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:13:30,579 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:13:30,579 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:13:30,579 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:13:30,579 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:13:30,579 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:13:30,580 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:13:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-04 16:13:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 16:13:30,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:13:30,614 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:13:30,614 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:13:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:13:30,621 INFO L82 PathProgramCache]: Analyzing trace with hash -611063963, now seen corresponding path program 1 times [2020-09-04 16:13:30,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:13:30,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116164597] [2020-09-04 16:13:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:13:30,703 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:13:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:30,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:13:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:30,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 16:13:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:13:31,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116164597] [2020-09-04 16:13:31,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:13:31,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:13:31,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503267451] [2020-09-04 16:13:31,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:13:31,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:13:31,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:13:31,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:13:31,079 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 8 states. [2020-09-04 16:13:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:13:31,340 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-09-04 16:13:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 16:13:31,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-09-04 16:13:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:13:31,354 INFO L225 Difference]: With dead ends: 29 [2020-09-04 16:13:31,354 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 16:13:31,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-04 16:13:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 16:13:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 16:13:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 16:13:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-04 16:13:31,417 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-04 16:13:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:13:31,418 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-04 16:13:31,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:13:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-04 16:13:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 16:13:31,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:13:31,420 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:13:31,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:13:31,421 INFO L427 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:13:31,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:13:31,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1633986229, now seen corresponding path program 2 times [2020-09-04 16:13:31,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:13:31,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958382674] [2020-09-04 16:13:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:13:31,424 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:13:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:13:31,440 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:13:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:13:31,454 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:13:31,478 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:13:31,478 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:13:31,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:13:31,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:13:31 BoogieIcfgContainer [2020-09-04 16:13:31,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:13:31,503 INFO L168 Benchmark]: Toolchain (without parser) took 1657.29 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 103.1 MB in the beginning and 127.4 MB in the end (delta: -24.4 MB). Peak memory consumption was 40.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:13:31,504 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:13:31,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.02 ms. Allocated memory is still 140.5 MB. Free memory was 102.9 MB in the beginning and 94.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-09-04 16:13:31,506 INFO L168 Benchmark]: Boogie Preprocessor took 114.88 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 94.0 MB in the beginning and 184.2 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:13:31,507 INFO L168 Benchmark]: RCFGBuilder took 249.47 ms. Allocated memory is still 205.0 MB. Free memory was 184.2 MB in the beginning and 173.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 16:13:31,508 INFO L168 Benchmark]: TraceAbstraction took 1002.68 ms. Allocated memory is still 205.0 MB. Free memory was 173.2 MB in the beginning and 127.4 MB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:13:31,512 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 285.02 ms. Allocated memory is still 140.5 MB. Free memory was 102.9 MB in the beginning and 94.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.88 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 94.0 MB in the beginning and 184.2 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 249.47 ms. Allocated memory is still 205.0 MB. Free memory was 184.2 MB in the beginning and 173.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1002.68 ms. Allocated memory is still 205.0 MB. Free memory was 173.2 MB in the beginning and 127.4 MB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] CALL f(4) [L4] COND FALSE !(n<3) [L5] n-- [L6] CALL f(n) [L4] COND FALSE !(n<3) [L5] n-- [L6] CALL f(n) [L4] COND TRUE n<3 [L6] RET f(n) [L7] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 13 SDslu, 43 SDs, 0 SdLazy, 43 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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...