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/loops/nec40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:20:16,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:20:16,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:20:16,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 19:20:16,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 19:20:16,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 19:20:16,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 19:20:16,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 19:20:16,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 19:20:16,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 19:20:16,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 19:20:16,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 19:20:16,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:20:16,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:20:16,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:20:16,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:20:16,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:20:16,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:20:16,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:20:16,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:20:16,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:20:16,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:20:16,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:20:16,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:20:16,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:20:16,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 19:20:16,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 19:20:16,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 19:20:16,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 19:20:16,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 19:20:16,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 19:20:16,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 19:20:16,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 19:20:16,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:20:16,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:20:16,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:20:16,492 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 [2019-09-03 19:20:16,512 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:20:16,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:20:16,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:20:16,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:20:16,514 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:20:16,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:20:16,516 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:20:16,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:20:16,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:20:16,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:20:16,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:20:16,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:20:16,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:20:16,518 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:20:16,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:20:16,518 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:20:16,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:20:16,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:20:16,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:20:16,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:20:16,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:20:16,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:20:16,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:20:16,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:20:16,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:20:16,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:20:16,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:20:16,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:20:16,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:20:16,569 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:20:16,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:20:16,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:20:16,593 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:20:16,593 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:20:16,594 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec40.c [2019-09-03 19:20:16,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a88d4e2/74651945d91a4c5f8107e243aede978b/FLAGd21d77af9 [2019-09-03 19:20:17,061 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:20:17,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec40.c [2019-09-03 19:20:17,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a88d4e2/74651945d91a4c5f8107e243aede978b/FLAGd21d77af9 [2019-09-03 19:20:17,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a88d4e2/74651945d91a4c5f8107e243aede978b [2019-09-03 19:20:17,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:20:17,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:20:17,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:20:17,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:20:17,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:20:17,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:20:17" (1/1) ... [2019-09-03 19:20:17,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed68154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17, skipping insertion in model container [2019-09-03 19:20:17,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:20:17" (1/1) ... [2019-09-03 19:20:17,512 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:20:17,529 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:20:17,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:20:17,719 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:20:17,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:20:17,774 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:20:17,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17 WrapperNode [2019-09-03 19:20:17,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:20:17,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:20:17,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:20:17,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:20:17,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17" (1/1) ... [2019-09-03 19:20:17,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17" (1/1) ... [2019-09-03 19:20:17,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17" (1/1) ... [2019-09-03 19:20:17,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17" (1/1) ... [2019-09-03 19:20:17,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17" (1/1) ... [2019-09-03 19:20:17,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17" (1/1) ... [2019-09-03 19:20:17,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17" (1/1) ... [2019-09-03 19:20:17,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:20:17,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:20:17,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:20:17,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:20:17,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17" (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 [2019-09-03 19:20:18,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:20:18,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:20:18,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 19:20:18,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:20:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:20:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 19:20:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 19:20:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:20:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-03 19:20:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-03 19:20:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:20:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-03 19:20:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:20:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-03 19:20:18,231 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:20:18,232 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 19:20:18,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:20:18 BoogieIcfgContainer [2019-09-03 19:20:18,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:20:18,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:20:18,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:20:18,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:20:18,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:20:17" (1/3) ... [2019-09-03 19:20:18,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2baabbf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:20:18, skipping insertion in model container [2019-09-03 19:20:18,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:20:17" (2/3) ... [2019-09-03 19:20:18,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2baabbf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:20:18, skipping insertion in model container [2019-09-03 19:20:18,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:20:18" (3/3) ... [2019-09-03 19:20:18,242 INFO L109 eAbstractionObserver]: Analyzing ICFG nec40.c [2019-09-03 19:20:18,254 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:20:18,264 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:20:18,286 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:20:18,330 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:20:18,331 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:20:18,331 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:20:18,331 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:20:18,332 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:20:18,332 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:20:18,332 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:20:18,332 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:20:18,332 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:20:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-09-03 19:20:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 19:20:18,360 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:18,361 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:18,363 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:18,369 INFO L82 PathProgramCache]: Analyzing trace with hash -91485938, now seen corresponding path program 1 times [2019-09-03 19:20:18,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:18,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:18,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:18,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:18,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:20:18,522 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:20:18,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 19:20:18,525 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 19:20:18,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 19:20:18,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:20:18,543 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-09-03 19:20:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:18,564 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-09-03 19:20:18,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 19:20:18,566 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-09-03 19:20:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:18,574 INFO L225 Difference]: With dead ends: 38 [2019-09-03 19:20:18,575 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 19:20:18,578 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:20:18,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 19:20:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 19:20:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 19:20:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-03 19:20:18,613 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-03 19:20:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:18,614 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-03 19:20:18,614 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 19:20:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-03 19:20:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 19:20:18,615 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:18,615 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:18,615 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:18,616 INFO L82 PathProgramCache]: Analyzing trace with hash 883179888, now seen corresponding path program 1 times [2019-09-03 19:20:18,616 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:18,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:18,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:18,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:18,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:20:18,698 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:20:18,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 19:20:18,700 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 19:20:18,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 19:20:18,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:20:18,701 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2019-09-03 19:20:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:18,752 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-03 19:20:18,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 19:20:18,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-03 19:20:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:18,754 INFO L225 Difference]: With dead ends: 26 [2019-09-03 19:20:18,754 INFO L226 Difference]: Without dead ends: 18 [2019-09-03 19:20:18,755 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:20:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-03 19:20:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-03 19:20:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 19:20:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-03 19:20:18,761 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2019-09-03 19:20:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:18,762 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-03 19:20:18,762 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 19:20:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-03 19:20:18,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 19:20:18,763 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:18,763 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:18,763 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:18,764 INFO L82 PathProgramCache]: Analyzing trace with hash 975532875, now seen corresponding path program 1 times [2019-09-03 19:20:18,764 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:18,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:18,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:18,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:18,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:18,839 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Function const is already defined. at de.uni_freiburg.informatik.ultimate.logic.NoopScript.declareFun(NoopScript.java:139) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.declareFun(Scriptor.java:113) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.WrapperScript.declareFun(WrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.TermTransferrer.convertApplicationTerm(TermTransferrer.java:172) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:252) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computePredicates(NestedInterpolantsBuilder.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-09-03 19:20:18,848 INFO L168 Benchmark]: Toolchain (without parser) took 1349.44 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 88.3 MB in the beginning and 131.7 MB in the end (delta: -43.4 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2019-09-03 19:20:18,851 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 141.0 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 19:20:18,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.85 ms. Allocated memory is still 141.0 MB. Free memory was 88.1 MB in the beginning and 78.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-09-03 19:20:18,854 INFO L168 Benchmark]: Boogie Preprocessor took 179.95 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 78.2 MB in the beginning and 179.2 MB in the end (delta: -101.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-09-03 19:20:18,855 INFO L168 Benchmark]: RCFGBuilder took 277.94 ms. Allocated memory is still 202.4 MB. Free memory was 179.2 MB in the beginning and 164.9 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2019-09-03 19:20:18,858 INFO L168 Benchmark]: TraceAbstraction took 607.37 ms. Allocated memory is still 202.4 MB. Free memory was 164.9 MB in the beginning and 132.3 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. [2019-09-03 19:20:18,864 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 141.0 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.85 ms. Allocated memory is still 141.0 MB. Free memory was 88.1 MB in the beginning and 78.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 179.95 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 78.2 MB in the beginning and 179.2 MB in the end (delta: -101.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 277.94 ms. Allocated memory is still 202.4 MB. Free memory was 179.2 MB in the beginning and 164.9 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 607.37 ms. Allocated memory is still 202.4 MB. Free memory was 164.9 MB in the beginning and 132.3 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Function const is already defined. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Function const is already defined.: de.uni_freiburg.informatik.ultimate.logic.NoopScript.declareFun(NoopScript.java:139) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...