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_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:47:54,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:47:54,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:47:54,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:47:54,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:47:54,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:47:54,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:47:54,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:47:54,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:47:54,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:47:54,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:47:54,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:47:54,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:47:54,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:47:54,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:47:54,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:47:54,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:47:54,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:47:54,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:47:54,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:47:54,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:47:54,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:47:54,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:47:54,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:47:54,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 13:47:54,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 13:47:54,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 13:47:54,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 13:47:54,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 13:47:54,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 13:47:54,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:47:54,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:47:54,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:47:54,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:47:54,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:47:54,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:47:54,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:47:54,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:47:54,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:47:54,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:47:54,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:47:54,818 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 13:47:54,851 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:47:54,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:47:54,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:47:54,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:47:54,853 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:47:54,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:47:54,855 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:47:54,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:47:54,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:47:54,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:47:54,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:47:54,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:47:54,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:47:54,856 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:47:54,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:47:54,856 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:47:54,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:47:54,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:47:54,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:47:54,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:47:54,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:47:54,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:47:54,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:47:54,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:47:54,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:47:54,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:47:54,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:47:54,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:47:54,860 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 13:47:55,129 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:47:55,142 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:47:55,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:47:55,146 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:47:55,147 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:47:55,147 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2019-10-07 13:47:55,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5914130f2/de3fb168a4314096939c5701e2efd84c/FLAGf6d2ebfe1 [2019-10-07 13:47:55,654 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:47:55,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2019-10-07 13:47:55,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5914130f2/de3fb168a4314096939c5701e2efd84c/FLAGf6d2ebfe1 [2019-10-07 13:47:56,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5914130f2/de3fb168a4314096939c5701e2efd84c [2019-10-07 13:47:56,076 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:47:56,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:47:56,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:47:56,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:47:56,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:47:56,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:47:56" (1/1) ... [2019-10-07 13:47:56,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f82b407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56, skipping insertion in model container [2019-10-07 13:47:56,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:47:56" (1/1) ... [2019-10-07 13:47:56,097 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:47:56,114 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:47:56,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:47:56,309 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:47:56,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:47:56,334 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:47:56,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56 WrapperNode [2019-10-07 13:47:56,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:47:56,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:47:56,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:47:56,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:47:56,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56" (1/1) ... [2019-10-07 13:47:56,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56" (1/1) ... [2019-10-07 13:47:56,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56" (1/1) ... [2019-10-07 13:47:56,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56" (1/1) ... [2019-10-07 13:47:56,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56" (1/1) ... [2019-10-07 13:47:56,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56" (1/1) ... [2019-10-07 13:47:56,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56" (1/1) ... [2019-10-07 13:47:56,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:47:56,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:47:56,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:47:56,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:47:56,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56" (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 13:47:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:47:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:47:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-07 13:47:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 13:47:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:47:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:47:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-07 13:47:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 13:47:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:47:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:47:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:47:56,676 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:47:56,676 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-07 13:47:56,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:47:56 BoogieIcfgContainer [2019-10-07 13:47:56,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:47:56,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:47:56,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:47:56,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:47:56,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:47:56" (1/3) ... [2019-10-07 13:47:56,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f58157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:47:56, skipping insertion in model container [2019-10-07 13:47:56,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:56" (2/3) ... [2019-10-07 13:47:56,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f58157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:47:56, skipping insertion in model container [2019-10-07 13:47:56,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:47:56" (3/3) ... [2019-10-07 13:47:56,685 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2019-10-07 13:47:56,695 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:47:56,709 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:47:56,748 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:47:56,801 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:47:56,801 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:47:56,801 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:47:56,801 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:47:56,802 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:47:56,802 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:47:56,802 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:47:56,802 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:47:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-07 13:47:56,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-07 13:47:56,833 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:47:56,833 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:47:56,835 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:47:56,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:47:56,839 INFO L82 PathProgramCache]: Analyzing trace with hash -139420869, now seen corresponding path program 1 times [2019-10-07 13:47:56,846 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:47:56,846 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:56,846 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:56,846 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:47:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:47:56,934 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 13:47:56,935 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:56,935 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:47:56,936 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-07 13:47:56,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-07 13:47:56,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-07 13:47:56,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 13:47:56,953 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-07 13:47:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:47:56,979 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-07 13:47:56,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-07 13:47:56,981 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-07 13:47:56,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:47:56,989 INFO L225 Difference]: With dead ends: 31 [2019-10-07 13:47:56,989 INFO L226 Difference]: Without dead ends: 15 [2019-10-07 13:47:56,992 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 13:47:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-07 13:47:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-07 13:47:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-07 13:47:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-07 13:47:57,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2019-10-07 13:47:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:47:57,025 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-07 13:47:57,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-07 13:47:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-07 13:47:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-07 13:47:57,026 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:47:57,026 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:47:57,027 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:47:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:47:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1283988460, now seen corresponding path program 1 times [2019-10-07 13:47:57,028 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:47:57,028 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:57,028 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:57,028 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:47:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-07 13:47:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-07 13:47:57,077 INFO L161 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-07 13:47:57,077 INFO L451 BasicCegarLoop]: Counterexample might be feasible [2019-10-07 13:47:57,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 01:47:57 BoogieIcfgContainer [2019-10-07 13:47:57,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-07 13:47:57,098 INFO L168 Benchmark]: Toolchain (without parser) took 1019.14 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 104.1 MB in the beginning and 148.4 MB in the end (delta: -44.2 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:57,099 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 13:47:57,100 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.84 ms. Allocated memory is still 139.5 MB. Free memory was 103.9 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:57,101 INFO L168 Benchmark]: Boogie Preprocessor took 111.52 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 94.7 MB in the beginning and 182.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:57,102 INFO L168 Benchmark]: RCFGBuilder took 231.16 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 170.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:57,103 INFO L168 Benchmark]: TraceAbstraction took 416.53 ms. Allocated memory is still 203.4 MB. Free memory was 169.7 MB in the beginning and 148.4 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:57,107 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.84 ms. Allocated memory is still 139.5 MB. Free memory was 103.9 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.52 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 94.7 MB in the beginning and 182.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 231.16 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 170.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 416.53 ms. Allocated memory is still 203.4 MB. Free memory was 169.7 MB in the beginning and 148.4 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; [L24] COND TRUE 1 VAL [\old(x)=0, x=0] [L26] CALL eval() VAL [\old(x)=0, x=0] [L14] COND TRUE 1 [L15] x=1 [L26] RET eval() VAL [\old(x)=0, x=1] [L27] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 20 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 15 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 incorrect! Received shutdown request...