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 0.1.24-673a906-m [2019-10-03 02:33:22,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:33:22,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:33:22,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-03 02:33:22,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-03 02:33:22,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-03 02:33:22,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-03 02:33:22,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-03 02:33:22,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-03 02:33:22,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-03 02:33:22,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-03 02:33:22,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-03 02:33:22,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-03 02:33:22,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-03 02:33:22,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-03 02:33:22,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-03 02:33:22,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-03 02:33:22,915 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 [2019-10-03 02:33:22,932 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:33:22,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:33:22,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:33:22,932 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:33:22,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:33:22,934 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:33:22,935 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:33:22,935 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:33:22,935 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:33:22,935 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:33:22,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:33:22,937 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:33:22,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:33:22,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:33:22,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:33:22,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:33:22,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:33:22,938 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:33:22,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:33:22,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:33:22,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:33:22,940 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:33:22,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:33:22,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:33:22,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:33:22,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:33:22,941 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:33:22,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:33:22,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:33:22,942 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:33:22,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:33:22,993 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:33:22,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:33:22,998 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:33:22,998 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:33:22,999 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-10-03 02:33:23,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2b8520a8/32477f56189f4158935a9c2c7b4be265/FLAG0d6222674 [2019-10-03 02:33:23,501 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:33:23,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-10-03 02:33:23,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2b8520a8/32477f56189f4158935a9c2c7b4be265/FLAG0d6222674 [2019-10-03 02:33:23,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2b8520a8/32477f56189f4158935a9c2c7b4be265 [2019-10-03 02:33:23,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:33:23,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:33:23,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:33:23,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:33:23,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:33:23,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:33:23" (1/1) ... [2019-10-03 02:33:23,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b0ce6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:23, skipping insertion in model container [2019-10-03 02:33:23,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:33:23" (1/1) ... [2019-10-03 02:33:23,907 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:33:23,924 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:33:24,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:33:24,098 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:33:24,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:33:24,127 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:33:24,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:24 WrapperNode [2019-10-03 02:33:24,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:33:24,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:33:24,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:33:24,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:33:24,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:24" (1/1) ... [2019-10-03 02:33:24,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:24" (1/1) ... [2019-10-03 02:33:24,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:24" (1/1) ... [2019-10-03 02:33:24,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:24" (1/1) ... [2019-10-03 02:33:24,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:24" (1/1) ... [2019-10-03 02:33:24,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:24" (1/1) ... [2019-10-03 02:33:24,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:24" (1/1) ... [2019-10-03 02:33:24,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:33:24,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:33:24,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:33:24,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:33:24,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:24" (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 [2019-10-03 02:33:24,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:33:24,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:33:24,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:33:24,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:33:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:33:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-03 02:33:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:33:24,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-03 02:33:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:33:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:33:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:33:24,508 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:33:24,508 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-03 02:33:24,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:33:24 BoogieIcfgContainer [2019-10-03 02:33:24,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:33:24,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:33:24,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:33:24,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:33:24,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:33:23" (1/3) ... [2019-10-03 02:33:24,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43317b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:33:24, skipping insertion in model container [2019-10-03 02:33:24,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:24" (2/3) ... [2019-10-03 02:33:24,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43317b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:33:24, skipping insertion in model container [2019-10-03 02:33:24,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:33:24" (3/3) ... [2019-10-03 02:33:24,518 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2019-10-03 02:33:24,529 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:33:24,538 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:33:24,574 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:33:24,642 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:33:24,642 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:33:24,642 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:33:24,642 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:33:24,643 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:33:24,643 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:33:24,643 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:33:24,643 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:33:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-03 02:33:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-03 02:33:24,677 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:24,677 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:24,680 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:24,687 INFO L82 PathProgramCache]: Analyzing trace with hash -382823925, now seen corresponding path program 1 times [2019-10-03 02:33:24,690 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:24,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:24,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:24,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:24,742 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:24,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:33:24,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-03 02:33:24,797 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:33:24,800 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-03 02:33:24,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-03 02:33:24,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:33:24,813 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-10-03 02:33:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:24,826 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-10-03 02:33:24,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-03 02:33:24,828 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-03 02:33:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:24,836 INFO L225 Difference]: With dead ends: 22 [2019-10-03 02:33:24,837 INFO L226 Difference]: Without dead ends: 15 [2019-10-03 02:33:24,839 INFO L640 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 [2019-10-03 02:33:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-03 02:33:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-03 02:33:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-03 02:33:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-10-03 02:33:24,872 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2019-10-03 02:33:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:24,872 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-03 02:33:24,873 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-03 02:33:24,873 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-10-03 02:33:24,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-03 02:33:24,873 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:24,874 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:24,874 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:24,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1944032635, now seen corresponding path program 1 times [2019-10-03 02:33:24,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:24,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:24,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:24,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:24,877 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:25,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:33:25,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-03 02:33:25,145 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:33:25,147 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:33:25,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:33:25,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-03 02:33:25,148 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-10-03 02:33:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:25,206 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-10-03 02:33:25,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-03 02:33:25,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-03 02:33:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:25,208 INFO L225 Difference]: With dead ends: 21 [2019-10-03 02:33:25,208 INFO L226 Difference]: Without dead ends: 17 [2019-10-03 02:33:25,209 INFO L640 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 [2019-10-03 02:33:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-03 02:33:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-03 02:33:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-03 02:33:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-03 02:33:25,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-10-03 02:33:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:25,215 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-03 02:33:25,215 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:33:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-03 02:33:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-03 02:33:25,216 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:25,216 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:25,216 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1646139566, now seen corresponding path program 1 times [2019-10-03 02:33:25,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:25,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:25,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:25,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:25,219 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:29,669 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 84 DAG size of output: 10 [2019-10-03 02:33:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:29,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:29,717 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:33:29,718 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-10-03 02:33:29,720 INFO L207 CegarAbsIntRunner]: [0], [4], [7], [14], [17], [19], [22], [31], [38], [41], [43], [49], [50], [51], [53] [2019-10-03 02:33:29,750 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:33:29,750 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:33:29,840 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.