/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/id_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:19:01,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:19:01,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:19:01,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:19:01,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:19:01,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:19:01,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:19:01,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:19:01,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:19:01,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:19:01,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:19:01,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:19:01,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:19:01,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:19:01,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:19:01,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:19:01,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:19:01,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:19:01,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:19:01,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:19:01,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:19:01,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:19:01,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:19:01,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:19:01,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:19:01,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:19:01,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:19:01,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:19:01,577 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:19:01,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:19:01,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:19:01,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:19:01,589 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:19:01,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:19:01,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:19:01,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:19:01,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:19:01,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:19:01,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:19:01,590 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:19:01,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:19:01,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:19:01,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:19:01,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:19:01,594 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:19:01,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:19:01,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:19:01,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:19:01,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:19:01,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:19:01,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:19:01,596 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:19:01,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:19:01,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:19:01,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:19:01,925 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:19:01,926 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:19:01,926 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o3.c [2020-07-07 13:19:02,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e32860f/a38b3dbd99b648219e13e4a0fdb5a7a7/FLAG322379304 [2020-07-07 13:19:02,502 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:19:02,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o3.c [2020-07-07 13:19:02,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e32860f/a38b3dbd99b648219e13e4a0fdb5a7a7/FLAG322379304 [2020-07-07 13:19:02,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e32860f/a38b3dbd99b648219e13e4a0fdb5a7a7 [2020-07-07 13:19:02,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:19:02,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:19:02,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:19:02,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:19:02,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:19:02,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:19:02" (1/1) ... [2020-07-07 13:19:02,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700a714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:02, skipping insertion in model container [2020-07-07 13:19:02,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:19:02" (1/1) ... [2020-07-07 13:19:02,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:19:02,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:19:03,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:19:03,074 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:19:03,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:19:03,106 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:19:03,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:03 WrapperNode [2020-07-07 13:19:03,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:19:03,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:19:03,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:19:03,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:19:03,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:03" (1/1) ... [2020-07-07 13:19:03,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:03" (1/1) ... [2020-07-07 13:19:03,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:03" (1/1) ... [2020-07-07 13:19:03,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:03" (1/1) ... [2020-07-07 13:19:03,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:03" (1/1) ... [2020-07-07 13:19:03,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:03" (1/1) ... [2020-07-07 13:19:03,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:03" (1/1) ... [2020-07-07 13:19:03,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:19:03,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:19:03,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:19:03,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:19:03,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:19:03,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:19:03,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:19:03,287 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-07 13:19:03,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:19:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-07 13:19:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:19:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-07 13:19:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:19:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:19:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:19:03,451 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:19:03,451 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:19:03,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:19:03 BoogieIcfgContainer [2020-07-07 13:19:03,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:19:03,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:19:03,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:19:03,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:19:03,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:19:02" (1/3) ... [2020-07-07 13:19:03,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32783b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:19:03, skipping insertion in model container [2020-07-07 13:19:03,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:03" (2/3) ... [2020-07-07 13:19:03,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32783b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:19:03, skipping insertion in model container [2020-07-07 13:19:03,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:19:03" (3/3) ... [2020-07-07 13:19:03,466 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2020-07-07 13:19:03,478 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:19:03,485 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:19:03,500 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:19:03,521 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:19:03,521 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:19:03,522 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:19:03,522 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:19:03,522 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:19:03,522 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:19:03,522 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:19:03,522 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:19:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-07 13:19:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:19:03,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:19:03,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:19:03,549 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:19:03,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:19:03,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1651991454, now seen corresponding path program 1 times [2020-07-07 13:19:03,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:19:03,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814245756] [2020-07-07 13:19:03,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:19:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:19:03,913 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:19:03,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814245756] [2020-07-07 13:19:03,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:19:03,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:19:03,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772443592] [2020-07-07 13:19:03,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:19:03,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:19:03,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:19:03,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:19:03,937 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-07 13:19:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:19:04,034 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-07 13:19:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:19:04,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 13:19:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:19:04,048 INFO L225 Difference]: With dead ends: 37 [2020-07-07 13:19:04,049 INFO L226 Difference]: Without dead ends: 22 [2020-07-07 13:19:04,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:19:04,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-07 13:19:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-07 13:19:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-07 13:19:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-07 13:19:04,101 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-07-07 13:19:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:19:04,102 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-07 13:19:04,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:19:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-07 13:19:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 13:19:04,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:19:04,105 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:19:04,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:19:04,105 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:19:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:19:04,106 INFO L82 PathProgramCache]: Analyzing trace with hash 189324707, now seen corresponding path program 1 times [2020-07-07 13:19:04,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:19:04,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452072552] [2020-07-07 13:19:04,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 5 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 5 to 7 Garbage collection #2: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 [2020-07-07 13:19:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:19:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:19:04,503 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:19:04,503 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:19:04,503 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:19:04,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:19:04,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:19:04 BoogieIcfgContainer [2020-07-07 13:19:04,522 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:19:04,524 INFO L168 Benchmark]: Toolchain (without parser) took 1643.67 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 102.6 MB in the beginning and 130.9 MB in the end (delta: -28.3 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:04,525 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory is still 120.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:19:04,526 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.62 ms. Allocated memory is still 144.2 MB. Free memory was 102.2 MB in the beginning and 93.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:04,527 INFO L168 Benchmark]: Boogie Preprocessor took 30.44 ms. Allocated memory is still 144.2 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:04,528 INFO L168 Benchmark]: RCFGBuilder took 318.84 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 170.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:04,529 INFO L168 Benchmark]: TraceAbstraction took 1063.69 ms. Allocated memory is still 201.3 MB. Free memory was 169.3 MB in the beginning and 130.9 MB in the end (delta: 38.4 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:04,534 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory is still 120.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 225.62 ms. Allocated memory is still 144.2 MB. Free memory was 102.2 MB in the beginning and 93.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.44 ms. Allocated memory is still 144.2 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.84 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 170.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1063.69 ms. Allocated memory is still 201.3 MB. Free memory was 169.3 MB in the beginning and 130.9 MB in the end (delta: 38.4 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 3 SDslu, 65 SDs, 0 SdLazy, 11 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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: 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...