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/while_infinite_loop_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:47:45,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:47:45,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:47:45,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:47:45,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:47:45,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:47:45,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:47:45,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:47:45,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:47:45,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:47:45,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:47:45,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:47:45,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:47:45,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:47:45,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:47:45,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:47:45,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:47:45,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:47:45,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:47:45,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:47:45,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:47:45,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:47:45,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:47:45,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:47:45,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 13:47:45,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:47:45,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:47:45,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:47:45,681 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 13:47:45,713 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:47:45,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:47:45,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:47:45,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:47:45,718 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:47:45,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:47:45,719 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:47:45,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:47:45,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:47:45,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:47:45,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:47:45,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:47:45,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:47:45,720 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:47:45,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:47:45,720 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:47:45,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:47:45,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:47:45,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:47:45,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:47:45,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:47:45,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:47:45,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:47:45,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:47:45,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:47:45,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:47:45,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:47:45,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:47:45,725 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 13:47:45,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:47:45,989 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:47:45,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:47:45,994 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:47:45,994 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:47:45,995 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_2.c [2019-10-07 13:47:46,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f70e4d077/6e093447c07b4c0994a64621e5c67306/FLAGf2f914d3e [2019-10-07 13:47:46,474 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:47:46,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_2.c [2019-10-07 13:47:46,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f70e4d077/6e093447c07b4c0994a64621e5c67306/FLAGf2f914d3e [2019-10-07 13:47:46,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f70e4d077/6e093447c07b4c0994a64621e5c67306 [2019-10-07 13:47:46,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:47:46,886 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:47:46,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:47:46,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:47:46,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:47:46,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:47:46" (1/1) ... [2019-10-07 13:47:46,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f7fc14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:46, skipping insertion in model container [2019-10-07 13:47:46,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:47:46" (1/1) ... [2019-10-07 13:47:46,902 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:47:46,918 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:47:47,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:47:47,092 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:47:47,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:47:47,120 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:47:47,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:47 WrapperNode [2019-10-07 13:47:47,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:47:47,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:47:47,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:47:47,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:47:47,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:47" (1/1) ... [2019-10-07 13:47:47,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:47" (1/1) ... [2019-10-07 13:47:47,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:47" (1/1) ... [2019-10-07 13:47:47,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:47" (1/1) ... [2019-10-07 13:47:47,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:47" (1/1) ... [2019-10-07 13:47:47,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:47" (1/1) ... [2019-10-07 13:47:47,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:47" (1/1) ... [2019-10-07 13:47:47,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:47:47,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:47:47,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:47:47,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:47:47,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:47" (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 13:47:47,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:47:47,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:47:47,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-07 13:47:47,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:47:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:47:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-07 13:47:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:47:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:47:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:47:47,428 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:47:47,428 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 13:47:47,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:47:47 BoogieIcfgContainer [2019-10-07 13:47:47,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:47:47,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:47:47,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:47:47,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:47:47,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:47:46" (1/3) ... [2019-10-07 13:47:47,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a83712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:47:47, skipping insertion in model container [2019-10-07 13:47:47,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:47" (2/3) ... [2019-10-07 13:47:47,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a83712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:47:47, skipping insertion in model container [2019-10-07 13:47:47,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:47:47" (3/3) ... [2019-10-07 13:47:47,438 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_2.c [2019-10-07 13:47:47,446 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:47:47,453 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:47:47,462 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:47:47,484 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:47:47,485 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:47:47,485 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:47:47,485 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:47:47,485 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:47:47,485 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:47:47,485 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:47:47,486 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:47:47,503 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-07 13:47:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-07 13:47:47,509 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:47:47,510 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:47:47,511 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:47:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:47:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash 10926999, now seen corresponding path program 1 times [2019-10-07 13:47:47,524 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:47:47,524 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:47,524 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:47,524 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:47:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:47:47,612 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 13:47:47,613 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:47,613 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:47:47,614 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-07 13:47:47,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-07 13:47:47,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-07 13:47:47,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 13:47:47,628 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-10-07 13:47:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:47:47,651 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-10-07 13:47:47,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-07 13:47:47,653 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-07 13:47:47,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:47:47,661 INFO L225 Difference]: With dead ends: 26 [2019-10-07 13:47:47,661 INFO L226 Difference]: Without dead ends: 13 [2019-10-07 13:47:47,664 INFO L606 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 [2019-10-07 13:47:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-07 13:47:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-07 13:47:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-07 13:47:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-07 13:47:47,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-10-07 13:47:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:47:47,701 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-07 13:47:47,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-07 13:47:47,701 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-07 13:47:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-07 13:47:47,702 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:47:47,702 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:47:47,703 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:47:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:47:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash -13144129, now seen corresponding path program 1 times [2019-10-07 13:47:47,704 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:47:47,704 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:47,704 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:47,704 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:47:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:47:47,909 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 13:47:47,909 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:47,910 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:47:47,910 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 13:47:47,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 13:47:47,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 13:47:47,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:47:47,912 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2019-10-07 13:47:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:47:47,943 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-10-07 13:47:47,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 13:47:47,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-07 13:47:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:47:47,945 INFO L225 Difference]: With dead ends: 13 [2019-10-07 13:47:47,945 INFO L226 Difference]: Without dead ends: 0 [2019-10-07 13:47:47,946 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 13:47:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-07 13:47:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-07 13:47:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-07 13:47:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-07 13:47:47,948 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-10-07 13:47:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:47:47,948 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-07 13:47:47,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 13:47:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-07 13:47:47,949 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-07 13:47:47,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-07 13:47:47,989 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-07 13:47:47,989 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-07 13:47:47,989 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-07 13:47:47,989 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-07 13:47:47,989 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-07 13:47:47,990 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-07 13:47:47,990 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 9 18) the Hoare annotation is: true [2019-10-07 13:47:47,990 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 9 18) no Hoare annotation was computed. [2019-10-07 13:47:47,991 INFO L439 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (= main_~x~0 0) [2019-10-07 13:47:47,991 INFO L439 ceAbstractionStarter]: At program point L14-1(lines 12 15) the Hoare annotation is: (= main_~x~0 0) [2019-10-07 13:47:47,992 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 9 18) no Hoare annotation was computed. [2019-10-07 13:47:47,992 INFO L439 ceAbstractionStarter]: At program point L12-2(lines 12 15) the Hoare annotation is: false [2019-10-07 13:47:47,992 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-07 13:47:47,992 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-07 13:47:47,992 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-07 13:47:47,993 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-07 13:47:47,993 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-07 13:47:47,993 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-07 13:47:48,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 01:47:48 BoogieIcfgContainer [2019-10-07 13:47:48,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-07 13:47:48,013 INFO L168 Benchmark]: Toolchain (without parser) took 1125.25 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 102.9 MB in the beginning and 142.3 MB in the end (delta: -39.4 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:48,014 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 13:47:48,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.44 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:48,020 INFO L168 Benchmark]: Boogie Preprocessor took 108.66 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 93.3 MB in the beginning and 182.2 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:48,024 INFO L168 Benchmark]: RCFGBuilder took 199.61 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 172.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:48,026 INFO L168 Benchmark]: TraceAbstraction took 579.60 ms. Allocated memory is still 203.9 MB. Free memory was 172.2 MB in the beginning and 142.3 MB in the end (delta: 29.9 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:48,037 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 139.5 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.44 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.66 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 93.3 MB in the beginning and 182.2 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 199.61 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 172.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 579.60 ms. Allocated memory is still 203.9 MB. Free memory was 172.2 MB in the beginning and 142.3 MB in the end (delta: 29.9 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Result: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 5 SDslu, 19 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 10 PreInvPairs, 12 NumberOfFragments, 12 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 252 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...