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/eca-rers2012/Problem15_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:04:57,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:04:57,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:04:57,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:04:57,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 19:04:57,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 19:04:57,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 19:04:57,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 19:04:57,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 19:04:57,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 19:04:57,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 19:04:57,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 19:04:57,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 19:04:57,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 19:04:57,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 19:04:57,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 19:04:57,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 19:04:57,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 19:04:57,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 19:04:57,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 19:04:57,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 19:04:57,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 19:04:57,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 19:04:57,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 19:04:57,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 19:04:57,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 19:04:57,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 19:04:57,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 19:04:57,755 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 [2019-09-09 19:04:57,770 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:04:57,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:04:57,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:04:57,770 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:04:57,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:04:57,771 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:04:57,772 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:04:57,772 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:04:57,772 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:04:57,772 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:04:57,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:04:57,773 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:04:57,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:04:57,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:04:57,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:04:57,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:04:57,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:04:57,774 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:04:57,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:04:57,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:04:57,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:04:57,775 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:04:57,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:04:57,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:04:57,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:04:57,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:04:57,776 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:04:57,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:04:57,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:04:57,776 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:04:57,805 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:04:57,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:04:57,821 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:04:57,823 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:04:57,823 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:04:57,824 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label20.c [2019-09-09 19:04:57,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0cf7071/9b3eb7a310554fc88a85273f707d7385/FLAG17ba8f0cb [2019-09-09 19:04:58,624 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:04:58,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label20.c [2019-09-09 19:04:58,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0cf7071/9b3eb7a310554fc88a85273f707d7385/FLAG17ba8f0cb [2019-09-09 19:04:58,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0cf7071/9b3eb7a310554fc88a85273f707d7385 [2019-09-09 19:04:58,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:04:58,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:04:58,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:04:58,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:04:58,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:04:58,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:04:58" (1/1) ... [2019-09-09 19:04:58,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22835673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:04:58, skipping insertion in model container [2019-09-09 19:04:58,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:04:58" (1/1) ... [2019-09-09 19:04:58,764 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:04:58,855 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:04:59,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:04:59,827 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:05:00,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:05:00,162 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:05:00,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:05:00 WrapperNode [2019-09-09 19:05:00,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:05:00,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:05:00,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:05:00,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:05:00,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:05:00" (1/1) ... [2019-09-09 19:05:00,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:05:00" (1/1) ... [2019-09-09 19:05:00,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:05:00" (1/1) ... [2019-09-09 19:05:00,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:05:00" (1/1) ... [2019-09-09 19:05:00,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:05:00" (1/1) ... [2019-09-09 19:05:00,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:05:00" (1/1) ... [2019-09-09 19:05:00,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:05:00" (1/1) ... [2019-09-09 19:05:00,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:05:00,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:05:00,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:05:00,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:05:00,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:05:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:05:00,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:05:00,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:05:00,497 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:05:00,497 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:05:00,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:05:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:05:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:05:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:05:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:05:00,499 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:05:00,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:05:00,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:05:00,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:05:03,959 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:05:03,960 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:05:03,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:05:03 BoogieIcfgContainer [2019-09-09 19:05:03,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:05:03,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:05:03,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:05:03,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:05:03,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:04:58" (1/3) ... [2019-09-09 19:05:03,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297323d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:05:03, skipping insertion in model container [2019-09-09 19:05:03,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:05:00" (2/3) ... [2019-09-09 19:05:03,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297323d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:05:03, skipping insertion in model container [2019-09-09 19:05:03,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:05:03" (3/3) ... [2019-09-09 19:05:03,969 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label20.c [2019-09-09 19:05:03,979 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:05:03,988 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:05:04,004 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:05:04,031 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:05:04,031 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:05:04,031 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:05:04,032 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:05:04,032 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:05:04,032 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:05:04,032 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:05:04,032 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:05:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:05:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-09 19:05:04,073 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:05:04,074 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:05:04,076 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:05:04,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:05:04,082 INFO L82 PathProgramCache]: Analyzing trace with hash 601102440, now seen corresponding path program 1 times [2019-09-09 19:05:04,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:05:04,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:05:04,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:05:04,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:05:04,146 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:05:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:05:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:05:04,467 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:05:04,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:05:04,468 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:05:04,474 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:05:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:05:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:05:04,493 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:05:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:05:09,753 INFO L93 Difference]: Finished difference Result 1075 states and 1542 transitions. [2019-09-09 19:05:09,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:05:09,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2019-09-09 19:05:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:05:09,802 INFO L225 Difference]: With dead ends: 1075 [2019-09-09 19:05:09,803 INFO L226 Difference]: Without dead ends: 1002 [2019-09-09 19:05:09,806 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:05:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2019-09-09 19:05:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1000. [2019-09-09 19:05:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2019-09-09 19:05:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1444 transitions. [2019-09-09 19:05:09,937 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1444 transitions. Word has length 48 [2019-09-09 19:05:09,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:05:09,937 INFO L475 AbstractCegarLoop]: Abstraction has 1000 states and 1444 transitions. [2019-09-09 19:05:09,938 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:05:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1444 transitions. [2019-09-09 19:05:09,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-09 19:05:09,944 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:05:09,944 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:05:09,944 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:05:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:05:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1050219660, now seen corresponding path program 1 times [2019-09-09 19:05:09,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:05:09,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:05:09,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:05:09,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:05:09,947 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:05:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:05:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:05:10,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:05:10,191 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:05:10,192 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 118 with the following transitions: [2019-09-09 19:05:10,195 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [365], [367], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [566], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:05:10,256 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:05:10,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:05:11,244 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:05:11,246 INFO L272 AbstractInterpreter]: Visited 73 different actions 73 times. Never merged. Never widened. Performed 185 root evaluator evaluations with a maximum evaluation depth of 9. Performed 185 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 19:05:11,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:05:11,252 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:05:11,942 INFO L227 lantSequenceWeakener]: Weakened 103 states. On average, predicates are now at 78.88% of their original sizes. [2019-09-09 19:05:11,943 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:05:12,029 INFO L420 sIntCurrentIteration]: We unified 116 AI predicates to 116 [2019-09-09 19:05:12,029 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:05:12,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:05:12,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 19:05:12,031 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:05:12,033 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 19:05:12,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 19:05:12,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 19:05:12,034 INFO L87 Difference]: Start difference. First operand 1000 states and 1444 transitions. Second operand 10 states. [2019-09-09 19:05:20,897 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.