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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:28:41,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:28:41,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:28:41,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 06:28:41,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:28:41,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:28:41,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:28:41,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:28:41,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:28:41,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:28:41,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:28:41,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:28:41,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:28:41,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:28:41,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:28:41,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:28:41,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:28:41,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:28:41,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:28:41,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:28:41,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-08 06:28:41,504 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:28:41,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:28:41,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:28:41,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:28:41,506 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:28:41,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:28:41,506 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:28:41,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:28:41,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:28:41,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:28:41,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:28:41,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:28:41,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:28:41,508 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:28:41,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:28:41,508 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:28:41,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:28:41,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:28:41,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:28:41,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:28:41,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:28:41,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:28:41,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:28:41,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:28:41,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:28:41,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:28:41,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:28:41,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:28:41,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:28:41,549 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:28:41,562 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:28:41,566 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:28:41,567 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:28:41,567 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:28:41,568 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2019-09-08 06:28:41,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40f8ee54/405cccf7e0da4b698359a45ca538b4a8/FLAGa4c82757e [2019-09-08 06:28:42,138 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:28:42,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2019-09-08 06:28:42,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40f8ee54/405cccf7e0da4b698359a45ca538b4a8/FLAGa4c82757e [2019-09-08 06:28:42,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40f8ee54/405cccf7e0da4b698359a45ca538b4a8 [2019-09-08 06:28:42,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:28:42,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:28:42,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:28:42,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:28:42,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:28:42,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:28:42" (1/1) ... [2019-09-08 06:28:42,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250219f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42, skipping insertion in model container [2019-09-08 06:28:42,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:28:42" (1/1) ... [2019-09-08 06:28:42,508 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:28:42,525 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:28:42,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:28:42,704 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:28:42,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:28:42,745 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:28:42,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42 WrapperNode [2019-09-08 06:28:42,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:28:42,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:28:42,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:28:42,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:28:42,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42" (1/1) ... [2019-09-08 06:28:42,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42" (1/1) ... [2019-09-08 06:28:42,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42" (1/1) ... [2019-09-08 06:28:42,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42" (1/1) ... [2019-09-08 06:28:42,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42" (1/1) ... [2019-09-08 06:28:42,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42" (1/1) ... [2019-09-08 06:28:42,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42" (1/1) ... [2019-09-08 06:28:42,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:28:42,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:28:42,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:28:42,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:28:42,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42" (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 [2019-09-08 06:28:42,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:28:42,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:28:42,930 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-09-08 06:28:42,930 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:28:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:28:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-09-08 06:28:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:28:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:28:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:28:43,107 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:28:43,108 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:28:43,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:28:43 BoogieIcfgContainer [2019-09-08 06:28:43,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:28:43,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:28:43,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:28:43,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:28:43,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:28:42" (1/3) ... [2019-09-08 06:28:43,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386c102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:28:43, skipping insertion in model container [2019-09-08 06:28:43,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:28:42" (2/3) ... [2019-09-08 06:28:43,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386c102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:28:43, skipping insertion in model container [2019-09-08 06:28:43,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:28:43" (3/3) ... [2019-09-08 06:28:43,118 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2019-09-08 06:28:43,127 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:28:43,135 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:28:43,153 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:28:43,205 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:28:43,212 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:28:43,213 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:28:43,213 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:28:43,213 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:28:43,213 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:28:43,214 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:28:43,214 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:28:43,218 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:28:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-08 06:28:43,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:28:43,271 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:43,272 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:28:43,274 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:43,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:43,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2019-09-08 06:28:43,283 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:43,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:43,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:43,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:28:43,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:28:43,459 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:28:43,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:28:43,464 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:28:43,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:28:43,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:28:43,477 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-09-08 06:28:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:43,582 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-09-08 06:28:43,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:28:43,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:28:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:43,594 INFO L225 Difference]: With dead ends: 30 [2019-09-08 06:28:43,594 INFO L226 Difference]: Without dead ends: 18 [2019-09-08 06:28:43,597 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:28:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-08 06:28:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-08 06:28:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 06:28:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-08 06:28:43,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-08 06:28:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:43,641 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-08 06:28:43,641 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:28:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-08 06:28:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-08 06:28:43,644 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:43,644 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:28:43,645 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:43,646 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2019-09-08 06:28:43,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:43,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:43,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:43,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:28:43,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 06:28:43,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:43,720 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:43,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:28:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:43,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:28:43,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:28:43,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:43,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:28:43,829 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:28:43,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:28:43,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:28:43,833 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2019-09-08 06:28:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:43,938 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-09-08 06:28:43,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:28:43,939 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-09-08 06:28:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:43,940 INFO L225 Difference]: With dead ends: 25 [2019-09-08 06:28:43,940 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:28:43,942 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:28:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:28:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 06:28:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:28:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-08 06:28:43,958 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-09-08 06:28:43,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:43,960 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-08 06:28:43,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:28:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-08 06:28:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-08 06:28:43,962 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:43,962 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:28:43,963 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:43,963 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2019-09-08 06:28:43,965 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:43,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:43,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:43,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:28:43,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:28:44,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:44,384 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:44,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:28:44,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:28:44,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:44,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-08 06:28:44,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:28:44,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:44,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2019-09-08 06:28:44,852 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 06:28:44,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 06:28:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:28:44,854 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2019-09-08 06:28:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:45,451 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-09-08 06:28:45,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:28:45,452 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2019-09-08 06:28:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:45,453 INFO L225 Difference]: With dead ends: 24 [2019-09-08 06:28:45,453 INFO L226 Difference]: Without dead ends: 0 [2019-09-08 06:28:45,455 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 06:28:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-08 06:28:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-08 06:28:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-08 06:28:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-08 06:28:45,457 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2019-09-08 06:28:45,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:45,458 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-08 06:28:45,458 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 06:28:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-08 06:28:45,458 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-08 06:28:45,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-08 06:28:45,520 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-08 06:28:45,520 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:28:45,520 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:28:45,520 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-08 06:28:45,520 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-08 06:28:45,521 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-08 06:28:45,521 INFO L443 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-09-08 06:28:45,521 INFO L439 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (<= (+ sum_~n sum_~m) (+ |sum_#in~n| |sum_#in~m|)) (<= |sum_#in~m| sum_~m) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2019-09-08 06:28:45,521 INFO L443 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-09-08 06:28:45,521 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-09-08 06:28:45,522 INFO L443 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-09-08 06:28:45,522 INFO L446 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-09-08 06:28:45,522 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2019-09-08 06:28:45,522 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2019-09-08 06:28:45,522 INFO L443 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-09-08 06:28:45,522 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-09-08 06:28:45,523 INFO L439 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (= main_~a~0 2) [2019-09-08 06:28:45,523 INFO L443 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-09-08 06:28:45,523 INFO L443 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2019-09-08 06:28:45,524 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-09-08 06:28:45,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:28:45 BoogieIcfgContainer [2019-09-08 06:28:45,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:28:45,534 INFO L168 Benchmark]: Toolchain (without parser) took 3042.40 ms. Allocated memory was 142.6 MB in the beginning and 231.7 MB in the end (delta: 89.1 MB). Free memory was 89.2 MB in the beginning and 90.8 MB in the end (delta: -1.6 MB). Peak memory consumption was 87.5 MB. Max. memory is 7.1 GB. [2019-09-08 06:28:45,537 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 142.6 MB. Free memory was 107.4 MB in the beginning and 107.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:28:45,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.67 ms. Allocated memory is still 142.6 MB. Free memory was 89.0 MB in the beginning and 80.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-09-08 06:28:45,542 INFO L168 Benchmark]: Boogie Preprocessor took 122.37 ms. Allocated memory was 142.6 MB in the beginning and 201.9 MB in the end (delta: 59.2 MB). Free memory was 80.0 MB in the beginning and 180.6 MB in the end (delta: -100.6 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-08 06:28:45,543 INFO L168 Benchmark]: RCFGBuilder took 240.95 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 169.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2019-09-08 06:28:45,545 INFO L168 Benchmark]: TraceAbstraction took 2419.93 ms. Allocated memory was 201.9 MB in the beginning and 231.7 MB in the end (delta: 29.9 MB). Free memory was 169.7 MB in the beginning and 90.8 MB in the end (delta: 78.9 MB). Peak memory consumption was 108.8 MB. Max. memory is 7.1 GB. [2019-09-08 06:28:45,555 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 142.6 MB. Free memory was 107.4 MB in the beginning and 107.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.67 ms. Allocated memory is still 142.6 MB. Free memory was 89.0 MB in the beginning and 80.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.37 ms. Allocated memory was 142.6 MB in the beginning and 201.9 MB in the end (delta: 59.2 MB). Free memory was 80.0 MB in the beginning and 180.6 MB in the end (delta: -100.6 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.95 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 169.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2419.93 ms. Allocated memory was 201.9 MB in the beginning and 231.7 MB in the end (delta: 29.9 MB). Free memory was 169.7 MB in the beginning and 90.8 MB in the end (delta: 78.9 MB). Peak memory consumption was 108.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 2.3s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 38 SDtfs, 42 SDslu, 201 SDs, 0 SdLazy, 220 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 25 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 9480 SizeOfPredicates, 11 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 18/36 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...