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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:52:46,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:52:46,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:52:46,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:52:46,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:52:46,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:52:46,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:52:46,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:52:46,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:52:46,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:52:46,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:52:46,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:52:46,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:52:46,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:52:46,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:52:46,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:52:46,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:52:46,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:52:46,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:52:46,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:52:46,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:52:46,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:52:46,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:52:46,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:52:46,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:52:46,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:52:46,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:52:46,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:52:46,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:52:46,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:52:46,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:52:46,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:52:46,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:52:46,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:52:46,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:52:46,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:52:46,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-03 20:52:46,934 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:52:46,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:52:46,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:52:46,935 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:52:46,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:52:46,936 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:52:46,936 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:52:46,936 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:52:46,936 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:52:46,937 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:52:46,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:52:46,937 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:52:46,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:52:46,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:52:46,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:52:46,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:52:46,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:52:46,939 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:52:46,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:52:46,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:52:46,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:52:46,939 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:52:46,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:52:46,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:52:46,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:52:46,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:52:46,940 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:52:46,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:52:46,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:52:46,941 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:52:46,975 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:52:46,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:52:46,990 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:52:46,992 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:52:46,992 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:52:46,993 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-09-03 20:52:47,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e2d5b12/861369a390f441239163e24eb8b34ed2/FLAG51b5bed86 [2019-09-03 20:52:47,540 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:52:47,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-09-03 20:52:47,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e2d5b12/861369a390f441239163e24eb8b34ed2/FLAG51b5bed86 [2019-09-03 20:52:47,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e2d5b12/861369a390f441239163e24eb8b34ed2 [2019-09-03 20:52:47,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:52:47,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:52:47,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:52:47,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:52:47,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:52:47,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:52:47" (1/1) ... [2019-09-03 20:52:47,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ab212e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:47, skipping insertion in model container [2019-09-03 20:52:47,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:52:47" (1/1) ... [2019-09-03 20:52:47,926 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:52:47,945 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:52:48,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:52:48,128 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:52:48,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:52:48,163 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:52:48,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:48 WrapperNode [2019-09-03 20:52:48,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:52:48,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:52:48,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:52:48,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:52:48,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:48" (1/1) ... [2019-09-03 20:52:48,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:48" (1/1) ... [2019-09-03 20:52:48,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:48" (1/1) ... [2019-09-03 20:52:48,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:48" (1/1) ... [2019-09-03 20:52:48,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:48" (1/1) ... [2019-09-03 20:52:48,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:48" (1/1) ... [2019-09-03 20:52:48,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:48" (1/1) ... [2019-09-03 20:52:48,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:52:48,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:52:48,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:52:48,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:52:48,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:52:48,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:52:48,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:52:48,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:52:48,359 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:52:48,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:52:48,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:52:48,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:52:48,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:52:48,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:52:48,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:52:48,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:52:48,557 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:52:48,558 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:52:48,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:52:48 BoogieIcfgContainer [2019-09-03 20:52:48,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:52:48,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:52:48,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:52:48,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:52:48,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:52:47" (1/3) ... [2019-09-03 20:52:48,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8d9263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:52:48, skipping insertion in model container [2019-09-03 20:52:48,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:48" (2/3) ... [2019-09-03 20:52:48,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8d9263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:52:48, skipping insertion in model container [2019-09-03 20:52:48,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:52:48" (3/3) ... [2019-09-03 20:52:48,571 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2019-09-03 20:52:48,590 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:52:48,601 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:52:48,642 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:52:48,688 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:52:48,689 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:52:48,689 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:52:48,689 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:52:48,689 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:52:48,689 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:52:48,689 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:52:48,690 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:52:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-03 20:52:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 20:52:48,713 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:48,714 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:48,716 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:48,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:48,720 INFO L82 PathProgramCache]: Analyzing trace with hash -382823925, now seen corresponding path program 1 times [2019-09-03 20:52:48,722 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:48,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:48,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:48,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:48,761 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:48,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:52:48,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:52:48,831 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:48,834 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:52:48,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:52:48,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:52:48,849 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-09-03 20:52:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:48,864 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-09-03 20:52:48,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:52:48,866 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-09-03 20:52:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:48,876 INFO L225 Difference]: With dead ends: 22 [2019-09-03 20:52:48,876 INFO L226 Difference]: Without dead ends: 15 [2019-09-03 20:52:48,879 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:52:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-03 20:52:48,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-03 20:52:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 20:52:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-09-03 20:52:48,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2019-09-03 20:52:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:48,916 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-09-03 20:52:48,916 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:52:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-09-03 20:52:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:52:48,917 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:48,917 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:48,918 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:48,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1944032635, now seen corresponding path program 1 times [2019-09-03 20:52:48,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:48,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:48,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:48,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:48,920 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:49,207 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2019-09-03 20:52:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:49,233 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:52:49,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:52:49,234 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:49,237 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:52:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:52:49,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:52:49,238 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-09-03 20:52:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:49,288 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-03 20:52:49,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:52:49,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-03 20:52:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:49,290 INFO L225 Difference]: With dead ends: 21 [2019-09-03 20:52:49,290 INFO L226 Difference]: Without dead ends: 17 [2019-09-03 20:52:49,291 INFO L628 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 [2019-09-03 20:52:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-03 20:52:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-03 20:52:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-03 20:52:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-09-03 20:52:49,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-09-03 20:52:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:49,301 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-09-03 20:52:49,301 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:52:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-09-03 20:52:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:52:49,302 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:49,303 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:49,305 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:49,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1646139566, now seen corresponding path program 1 times [2019-09-03 20:52:49,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:49,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:49,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:49,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:49,309 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:49,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:49,611 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:52:49,612 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-03 20:52:49,614 INFO L207 CegarAbsIntRunner]: [0], [4], [7], [14], [17], [19], [22], [31], [38], [41], [43], [49], [50], [51], [53] [2019-09-03 20:52:49,650 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:52:49,650 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:52:49,760 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.