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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:43:58,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:43:58,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:43:58,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:43:58,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:43:58,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:43:58,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:43:58,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:43:58,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:43:58,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:43:58,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:43:58,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:43:58,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:43:58,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:43:58,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:43:58,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:43:58,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:43:58,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:43:58,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:43:58,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:43:58,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:43:58,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:43:58,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:43:58,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:43:58,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 13:43:58,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:43:58,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:43:58,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:43:58,447 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 [2019-10-07 13:43:58,461 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:43:58,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:43:58,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:43:58,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:43:58,462 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:43:58,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:43:58,463 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:43:58,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:43:58,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:43:58,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:43:58,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:43:58,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:43:58,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:43:58,464 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:43:58,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:43:58,465 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:43:58,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:43:58,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:43:58,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:43:58,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:43:58,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:43:58,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:43:58,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:43:58,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:43:58,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:43:58,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:43:58,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:43:58,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:43:58,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 13:43:58,773 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:43:58,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:43:58,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:43:58,790 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:43:58,791 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:43:58,791 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-07 13:43:58,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afd052e7/d24c8a35edc04cfd90d396e483eebe2b/FLAG436cd1ea2 [2019-10-07 13:43:59,328 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:43:59,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-07 13:43:59,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afd052e7/d24c8a35edc04cfd90d396e483eebe2b/FLAG436cd1ea2 [2019-10-07 13:43:59,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afd052e7/d24c8a35edc04cfd90d396e483eebe2b [2019-10-07 13:43:59,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:43:59,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:43:59,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:43:59,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:43:59,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:43:59,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:43:59" (1/1) ... [2019-10-07 13:43:59,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da87ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:43:59, skipping insertion in model container [2019-10-07 13:43:59,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:43:59" (1/1) ... [2019-10-07 13:43:59,784 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:43:59,801 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:43:59,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:43:59,985 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:44:00,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:44:00,011 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:44:00,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:44:00 WrapperNode [2019-10-07 13:44:00,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:44:00,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:44:00,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:44:00,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:44:00,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:44:00" (1/1) ... [2019-10-07 13:44:00,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:44:00" (1/1) ... [2019-10-07 13:44:00,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:44:00" (1/1) ... [2019-10-07 13:44:00,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:44:00" (1/1) ... [2019-10-07 13:44:00,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:44:00" (1/1) ... [2019-10-07 13:44:00,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:44:00" (1/1) ... [2019-10-07 13:44:00,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:44:00" (1/1) ... [2019-10-07 13:44:00,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:44:00,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:44:00,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:44:00,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:44:00,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:44:00" (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 [2019-10-07 13:44:00,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:44:00,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:44:00,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-07 13:44:00,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:44:00,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:44:00,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-07 13:44:00,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-07 13:44:00,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 13:44:00,188 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:44:00,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:44:00,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:44:00,377 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:44:00,378 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 13:44:00,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:44:00 BoogieIcfgContainer [2019-10-07 13:44:00,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:44:00,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:44:00,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:44:00,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:44:00,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:43:59" (1/3) ... [2019-10-07 13:44:00,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561d2752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:44:00, skipping insertion in model container [2019-10-07 13:44:00,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:44:00" (2/3) ... [2019-10-07 13:44:00,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561d2752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:44:00, skipping insertion in model container [2019-10-07 13:44:00,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:44:00" (3/3) ... [2019-10-07 13:44:00,387 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-10-07 13:44:00,396 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:44:00,403 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:44:00,412 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:44:00,434 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:44:00,435 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:44:00,435 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:44:00,435 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:44:00,435 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:44:00,435 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:44:00,435 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:44:00,436 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:44:00,451 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-07 13:44:00,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 13:44:00,455 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:44:00,455 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:44:00,457 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:44:00,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:44:00,461 INFO L82 PathProgramCache]: Analyzing trace with hash 429908039, now seen corresponding path program 1 times [2019-10-07 13:44:00,467 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:44:00,468 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:44:00,468 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:44:00,468 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:44:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:44:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:44:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:44:00,741 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:44:00,741 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:44:00,742 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 13:44:00,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 13:44:00,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 13:44:00,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-07 13:44:00,764 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2019-10-07 13:44:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:44:00,939 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2019-10-07 13:44:00,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 13:44:00,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-07 13:44:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:44:00,951 INFO L225 Difference]: With dead ends: 50 [2019-10-07 13:44:00,952 INFO L226 Difference]: Without dead ends: 26 [2019-10-07 13:44:00,956 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-07 13:44:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-07 13:44:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-07 13:44:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-07 13:44:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-07 13:44:00,994 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2019-10-07 13:44:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:44:00,994 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-07 13:44:00,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 13:44:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-07 13:44:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-07 13:44:00,995 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:44:00,996 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:44:00,996 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:44:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:44:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1060899037, now seen corresponding path program 1 times [2019-10-07 13:44:00,997 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:44:00,997 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:44:00,997 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:44:00,998 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:44:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:44:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:44:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:44:01,218 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:44:01,219 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:44:01,219 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-07 13:44:01,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-07 13:44:01,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-07 13:44:01,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-07 13:44:01,222 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-10-07 13:44:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:44:01,336 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-07 13:44:01,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 13:44:01,337 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-10-07 13:44:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:44:01,338 INFO L225 Difference]: With dead ends: 32 [2019-10-07 13:44:01,339 INFO L226 Difference]: Without dead ends: 28 [2019-10-07 13:44:01,340 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-07 13:44:01,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-07 13:44:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-07 13:44:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-07 13:44:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-07 13:44:01,348 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2019-10-07 13:44:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:44:01,348 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-07 13:44:01,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-07 13:44:01,349 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-07 13:44:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-07 13:44:01,350 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:44:01,350 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:44:01,350 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:44:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:44:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1450784830, now seen corresponding path program 1 times [2019-10-07 13:44:01,351 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:44:01,351 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:44:01,352 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:44:01,352 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:44:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:44:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-07 13:44:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-07 13:44:01,415 INFO L161 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-07 13:44:01,415 INFO L451 BasicCegarLoop]: Counterexample might be feasible [2019-10-07 13:44:01,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 01:44:01 BoogieIcfgContainer [2019-10-07 13:44:01,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-07 13:44:01,446 INFO L168 Benchmark]: Toolchain (without parser) took 1675.53 ms. Allocated memory was 141.6 MB in the beginning and 199.2 MB in the end (delta: 57.7 MB). Free memory was 99.6 MB in the beginning and 98.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 59.2 MB. Max. memory is 7.1 GB. [2019-10-07 13:44:01,448 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 118.0 MB in the beginning and 117.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 13:44:01,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.03 ms. Allocated memory is still 141.6 MB. Free memory was 99.4 MB in the beginning and 89.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-10-07 13:44:01,452 INFO L168 Benchmark]: Boogie Preprocessor took 123.09 ms. Allocated memory was 141.6 MB in the beginning and 199.2 MB in the end (delta: 57.7 MB). Free memory was 89.7 MB in the beginning and 176.9 MB in the end (delta: -87.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-10-07 13:44:01,453 INFO L168 Benchmark]: RCFGBuilder took 243.44 ms. Allocated memory is still 199.2 MB. Free memory was 176.9 MB in the beginning and 164.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2019-10-07 13:44:01,455 INFO L168 Benchmark]: TraceAbstraction took 1060.47 ms. Allocated memory is still 199.2 MB. Free memory was 164.5 MB in the beginning and 98.1 MB in the end (delta: 66.4 MB). Peak memory consumption was 66.4 MB. Max. memory is 7.1 GB. [2019-10-07 13:44:01,465 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 118.0 MB in the beginning and 117.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.03 ms. Allocated memory is still 141.6 MB. Free memory was 99.4 MB in the beginning and 89.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.09 ms. Allocated memory was 141.6 MB in the beginning and 199.2 MB in the end (delta: 57.7 MB). Free memory was 89.7 MB in the beginning and 176.9 MB in the end (delta: -87.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 243.44 ms. Allocated memory is still 199.2 MB. Free memory was 176.9 MB in the beginning and 164.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1060.47 ms. Allocated memory is still 199.2 MB. Free memory was 164.5 MB in the beginning and 98.1 MB in the end (delta: 66.4 MB). Peak memory consumption was 66.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i