/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 21:37:43,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 21:37:43,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 21:37:43,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 21:37:43,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 21:37:43,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 21:37:43,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 21:37:43,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 21:37:43,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 21:37:43,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 21:37:43,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 21:37:43,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 21:37:43,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 21:37:43,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 21:37:43,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 21:37:43,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 21:37:43,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 21:37:43,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 21:37:43,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 21:37:43,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 21:37:43,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 21:37:43,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 21:37:43,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 21:37:43,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 21:37:43,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 21:37:43,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 21:37:43,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 21:37:43,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 21:37:43,516 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 21:37:43,544 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 21:37:43,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 21:37:43,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 21:37:43,550 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 21:37:43,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 21:37:43,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 21:37:43,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 21:37:43,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 21:37:43,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 21:37:43,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 21:37:43,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 21:37:43,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 21:37:43,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 21:37:43,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 21:37:43,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 21:37:43,553 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 21:37:43,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 21:37:43,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 21:37:43,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:37:43,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 21:37:43,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 21:37:43,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 21:37:43,555 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 21:37:44,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 21:37:44,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 21:37:44,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 21:37:44,041 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 21:37:44,041 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 21:37:44,042 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann02.c [2020-09-04 21:37:44,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d80dfa855/d688dbf6c3384fc8ac06bb79a9ac4e48/FLAG9ed8fa4c2 [2020-09-04 21:37:44,656 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 21:37:44,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann02.c [2020-09-04 21:37:44,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d80dfa855/d688dbf6c3384fc8ac06bb79a9ac4e48/FLAG9ed8fa4c2 [2020-09-04 21:37:45,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d80dfa855/d688dbf6c3384fc8ac06bb79a9ac4e48 [2020-09-04 21:37:45,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 21:37:45,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 21:37:45,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 21:37:45,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 21:37:45,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 21:37:45,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:37:45" (1/1) ... [2020-09-04 21:37:45,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea0c575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45, skipping insertion in model container [2020-09-04 21:37:45,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:37:45" (1/1) ... [2020-09-04 21:37:45,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 21:37:45,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 21:37:45,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:37:45,337 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 21:37:45,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:37:45,370 INFO L208 MainTranslator]: Completed translation [2020-09-04 21:37:45,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45 WrapperNode [2020-09-04 21:37:45,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 21:37:45,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 21:37:45,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 21:37:45,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 21:37:45,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45" (1/1) ... [2020-09-04 21:37:45,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45" (1/1) ... [2020-09-04 21:37:45,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45" (1/1) ... [2020-09-04 21:37:45,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45" (1/1) ... [2020-09-04 21:37:45,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45" (1/1) ... [2020-09-04 21:37:45,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45" (1/1) ... [2020-09-04 21:37:45,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45" (1/1) ... [2020-09-04 21:37:45,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 21:37:45,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 21:37:45,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 21:37:45,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 21:37:45,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45" (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 21:37:45,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 21:37:45,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 21:37:45,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-09-04 21:37:45,554 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 21:37:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 21:37:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 21:37:45,555 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-09-04 21:37:45,555 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 21:37:45,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 21:37:45,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 21:37:45,810 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 21:37:45,810 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 21:37:45,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:37:45 BoogieIcfgContainer [2020-09-04 21:37:45,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 21:37:45,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 21:37:45,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 21:37:45,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 21:37:45,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 09:37:45" (1/3) ... [2020-09-04 21:37:45,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8d24b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:37:45, skipping insertion in model container [2020-09-04 21:37:45,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:37:45" (2/3) ... [2020-09-04 21:37:45,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8d24b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:37:45, skipping insertion in model container [2020-09-04 21:37:45,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:37:45" (3/3) ... [2020-09-04 21:37:45,851 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2020-09-04 21:37:45,877 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 21:37:45,893 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 21:37:45,911 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 21:37:45,939 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 21:37:45,939 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 21:37:45,939 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 21:37:45,939 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 21:37:45,940 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 21:37:45,940 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 21:37:45,940 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 21:37:45,940 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 21:37:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-04 21:37:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 21:37:45,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:37:45,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:37:45,974 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:37:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:37:45,980 INFO L82 PathProgramCache]: Analyzing trace with hash -852610024, now seen corresponding path program 1 times [2020-09-04 21:37:45,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:37:45,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254845807] [2020-09-04 21:37:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:37:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:46,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:37:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:46,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:37:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:37:46,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254845807] [2020-09-04 21:37:46,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:37:46,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 21:37:46,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24691047] [2020-09-04 21:37:46,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 21:37:46,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:37:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 21:37:46,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:37:46,294 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 5 states. [2020-09-04 21:37:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:37:46,449 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2020-09-04 21:37:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 21:37:46,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-04 21:37:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:37:46,466 INFO L225 Difference]: With dead ends: 88 [2020-09-04 21:37:46,466 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 21:37:46,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 21:37:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 21:37:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-04 21:37:46,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 21:37:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-09-04 21:37:46,532 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24 [2020-09-04 21:37:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:37:46,533 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-09-04 21:37:46,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 21:37:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-09-04 21:37:46,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 21:37:46,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:37:46,538 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:37:46,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 21:37:46,538 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:37:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:37:46,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1574290279, now seen corresponding path program 1 times [2020-09-04 21:37:46,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:37:46,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873251916] [2020-09-04 21:37:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:37:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:46,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:37:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:46,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:37:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:46,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:37:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-04 21:37:46,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873251916] [2020-09-04 21:37:46,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:37:46,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 21:37:46,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511809337] [2020-09-04 21:37:46,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 21:37:46,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:37:46,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 21:37:46,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 21:37:46,713 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 6 states. [2020-09-04 21:37:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:37:46,873 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-09-04 21:37:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 21:37:46,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-09-04 21:37:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:37:46,878 INFO L225 Difference]: With dead ends: 68 [2020-09-04 21:37:46,878 INFO L226 Difference]: Without dead ends: 62 [2020-09-04 21:37:46,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 21:37:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-04 21:37:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-09-04 21:37:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 21:37:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2020-09-04 21:37:46,902 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 34 [2020-09-04 21:37:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:37:46,903 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2020-09-04 21:37:46,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 21:37:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2020-09-04 21:37:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-04 21:37:46,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:37:46,907 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:37:46,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 21:37:46,908 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:37:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:37:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1453709960, now seen corresponding path program 2 times [2020-09-04 21:37:46,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:37:46,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992511255] [2020-09-04 21:37:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:37:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:46,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:37:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:46,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:37:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:47,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:37:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:47,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:37:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:37:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 21:37:47,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992511255] [2020-09-04 21:37:47,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:37:47,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-04 21:37:47,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589733266] [2020-09-04 21:37:47,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 21:37:47,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:37:47,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 21:37:47,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 21:37:47,052 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand 4 states. [2020-09-04 21:37:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:37:47,140 INFO L93 Difference]: Finished difference Result 115 states and 174 transitions. [2020-09-04 21:37:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 21:37:47,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-09-04 21:37:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:37:47,144 INFO L225 Difference]: With dead ends: 115 [2020-09-04 21:37:47,144 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 21:37:47,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:37:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 21:37:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-04 21:37:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 21:37:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2020-09-04 21:37:47,166 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 44 [2020-09-04 21:37:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:37:47,167 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2020-09-04 21:37:47,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 21:37:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2020-09-04 21:37:47,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-04 21:37:47,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:37:47,171 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:37:47,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 21:37:47,171 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:37:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:37:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1096450289, now seen corresponding path program 1 times [2020-09-04 21:37:47,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:37:47,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263361384] [2020-09-04 21:37:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:37:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 21:37:47,197 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 21:37:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 21:37:47,241 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 21:37:47,269 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 21:37:47,269 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 21:37:47,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 21:37:47,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 09:37:47 BoogieIcfgContainer [2020-09-04 21:37:47,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 21:37:47,312 INFO L168 Benchmark]: Toolchain (without parser) took 2228.69 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 103.2 MB in the beginning and 189.7 MB in the end (delta: -86.5 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-09-04 21:37:47,313 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 21:37:47,314 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.94 ms. Allocated memory is still 139.5 MB. Free memory was 103.0 MB in the beginning and 93.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-04 21:37:47,315 INFO L168 Benchmark]: Boogie Preprocessor took 104.90 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 93.6 MB in the beginning and 180.5 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-09-04 21:37:47,316 INFO L168 Benchmark]: RCFGBuilder took 340.07 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 166.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-09-04 21:37:47,317 INFO L168 Benchmark]: TraceAbstraction took 1475.04 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 166.0 MB in the beginning and 189.7 MB in the end (delta: -23.7 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB. [2020-09-04 21:37:47,321 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.94 ms. Allocated memory is still 139.5 MB. Free memory was 103.0 MB in the beginning and 93.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.90 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 93.6 MB in the beginning and 180.5 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 340.07 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 166.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1475.04 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 166.0 MB in the beginning and 189.7 MB in the end (delta: -23.7 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int m = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=2, m=2] [L27] COND FALSE !(m < 0 || m > 3) VAL [m=2] [L32] int n = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, m=2, n=0] [L33] COND FALSE !(n < 0 || n > 23) VAL [m=2, n=0] [L39] CALL, EXPR ackermann(m,n) VAL [\old(m)=2, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L18] COND TRUE n==0 VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=1] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L18] COND FALSE !(n==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L21] CALL, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L18] COND TRUE n==0 VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=0, \old(n)=1] [L15] COND TRUE m==0 VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L16] return n+1; VAL [\old(m)=0, \old(n)=1, \result=2, m=0, n=1] [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=0, ackermann(m-1,1)=2, m=1, n=0] [L19] return ackermann(m-1,1); VAL [\old(m)=1, \old(n)=0, \result=2, ackermann(m-1,1)=2, m=1, n=0] [L21] RET, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, m=1, n=1] [L21] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=0, \old(n)=2] [L15] COND TRUE m==0 VAL [\old(m)=0, \old(n)=2, m=0, n=2] [L16] return n+1; VAL [\old(m)=0, \old(n)=2, \result=3, m=0, n=2] [L21] RET, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, ackermann(m-1,ackermann(m,n-1))=3, m=1, n=1] [L21] return ackermann(m-1,ackermann(m,n-1)); VAL [\old(m)=1, \old(n)=1, \result=3, ackermann(m,n-1)=2, ackermann(m-1,ackermann(m,n-1))=3, m=1, n=1] [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=2, \old(n)=0, ackermann(m-1,1)=3, m=2, n=0] [L19] return ackermann(m-1,1); VAL [\old(m)=2, \old(n)=0, \result=3, ackermann(m-1,1)=3, m=2, n=0] [L39] RET, EXPR ackermann(m,n) VAL [ackermann(m,n)=3, m=2, n=0] [L39] int result = ackermann(m,n); VAL [ackermann(m,n)=3, m=2, n=0, result=3] [L40] COND FALSE !(m < 2 || result >= 4) VAL [m=2, n=0, result=3] [L43] __VERIFIER_error() VAL [m=2, n=0, result=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 128 SDtfs, 77 SDslu, 245 SDs, 0 SdLazy, 128 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 5757 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 22/25 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...