java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label22_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 12:02:15,863 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 12:02:15,866 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 12:02:15,881 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 12:02:15,882 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 12:02:15,883 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 12:02:15,884 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 12:02:15,886 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 12:02:15,887 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 12:02:15,888 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 12:02:15,889 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 12:02:15,889 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 12:02:15,890 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 12:02:15,891 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 12:02:15,893 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 12:02:15,893 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 12:02:15,894 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 12:02:15,898 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 12:02:15,902 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 12:02:15,904 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 12:02:15,906 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 12:02:15,908 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 12:02:15,910 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 12:02:15,911 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 12:02:15,911 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 12:02:15,912 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 12:02:15,912 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 12:02:15,915 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 12:02:15,916 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 12:02:15,917 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 12:02:15,917 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 12:02:15,920 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 12:02:15,926 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 12:02:15,955 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 12:02:15,956 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 12:02:15,957 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 12:02:15,957 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 12:02:15,957 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 12:02:15,957 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 12:02:15,957 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 12:02:15,958 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 12:02:15,958 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 12:02:15,958 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 12:02:15,958 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 12:02:15,958 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 12:02:15,959 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 12:02:15,959 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 12:02:15,960 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 12:02:15,960 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 12:02:15,960 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 12:02:15,960 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 12:02:15,960 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 12:02:15,960 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 12:02:15,961 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 12:02:15,961 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 12:02:15,961 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 12:02:15,961 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 12:02:15,962 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 12:02:15,962 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 12:02:15,962 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 12:02:15,962 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 12:02:15,962 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 12:02:15,963 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 12:02:15,963 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 12:02:15,963 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 12:02:15,963 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 12:02:15,963 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 12:02:16,008 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 12:02:16,021 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 12:02:16,029 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 12:02:16,031 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 12:02:16,031 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 12:02:16,032 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label22_false-unreach-call_false-termination.c [2018-11-07 12:02:16,100 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f73f3c0/0dc12b2e6bfb47c99ac127a9581eeb38/FLAG97cecda0a [2018-11-07 12:02:16,679 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 12:02:16,681 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label22_false-unreach-call_false-termination.c [2018-11-07 12:02:16,707 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f73f3c0/0dc12b2e6bfb47c99ac127a9581eeb38/FLAG97cecda0a [2018-11-07 12:02:16,728 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0f73f3c0/0dc12b2e6bfb47c99ac127a9581eeb38 [2018-11-07 12:02:16,739 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 12:02:16,740 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 12:02:16,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 12:02:16,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 12:02:16,745 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 12:02:16,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:02:16" (1/1) ... [2018-11-07 12:02:16,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c053053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:16, skipping insertion in model container [2018-11-07 12:02:16,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:02:16" (1/1) ... [2018-11-07 12:02:16,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 12:02:16,846 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 12:02:17,352 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:02:17,357 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 12:02:17,559 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:02:17,582 INFO L193 MainTranslator]: Completed translation [2018-11-07 12:02:17,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17 WrapperNode [2018-11-07 12:02:17,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 12:02:17,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 12:02:17,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 12:02:17,584 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 12:02:17,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (1/1) ... [2018-11-07 12:02:17,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (1/1) ... [2018-11-07 12:02:17,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 12:02:17,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 12:02:17,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 12:02:17,767 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 12:02:17,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (1/1) ... [2018-11-07 12:02:17,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (1/1) ... [2018-11-07 12:02:17,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (1/1) ... [2018-11-07 12:02:17,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (1/1) ... [2018-11-07 12:02:17,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (1/1) ... [2018-11-07 12:02:17,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (1/1) ... [2018-11-07 12:02:17,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (1/1) ... [2018-11-07 12:02:17,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 12:02:17,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 12:02:17,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 12:02:17,901 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 12:02:17,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (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 [2018-11-07 12:02:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 12:02:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 12:02:17,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 12:02:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 12:02:17,978 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 12:02:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 12:02:17,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 12:02:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 12:02:17,979 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 12:02:21,607 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 12:02:21,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:02:21 BoogieIcfgContainer [2018-11-07 12:02:21,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 12:02:21,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 12:02:21,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 12:02:21,613 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 12:02:21,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:02:16" (1/3) ... [2018-11-07 12:02:21,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c03d392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:02:21, skipping insertion in model container [2018-11-07 12:02:21,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:02:17" (2/3) ... [2018-11-07 12:02:21,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c03d392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:02:21, skipping insertion in model container [2018-11-07 12:02:21,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:02:21" (3/3) ... [2018-11-07 12:02:21,617 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label22_false-unreach-call_false-termination.c [2018-11-07 12:02:21,628 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 12:02:21,637 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 12:02:21,655 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 12:02:21,694 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 12:02:21,694 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 12:02:21,694 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 12:02:21,694 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 12:02:21,694 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 12:02:21,695 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 12:02:21,695 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 12:02:21,695 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 12:02:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 12:02:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-07 12:02:21,730 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:02:21,731 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 12:02:21,733 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:02:21,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:21,740 INFO L82 PathProgramCache]: Analyzing trace with hash -874290308, now seen corresponding path program 1 times [2018-11-07 12:02:21,743 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:02:21,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:21,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:02:21,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:21,793 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:02:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:02:22,151 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 12:02:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:02:22,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:02:22,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 12:02:22,173 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:02:22,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 12:02:22,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 12:02:22,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:02:22,193 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 12:02:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:02:23,959 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 12:02:23,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 12:02:23,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-11-07 12:02:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:02:23,981 INFO L225 Difference]: With dead ends: 691 [2018-11-07 12:02:23,981 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 12:02:23,990 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:02:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 12:02:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 12:02:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 12:02:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 12:02:24,090 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 20 [2018-11-07 12:02:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:02:24,091 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 12:02:24,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 12:02:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 12:02:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-11-07 12:02:24,097 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:02:24,097 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 12:02:24,098 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:02:24,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash 473181535, now seen corresponding path program 1 times [2018-11-07 12:02:24,098 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:02:24,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:24,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:02:24,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:24,100 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:02:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:02:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:02:24,413 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:02:24,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 12:02:24,414 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:02:24,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 12:02:24,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 12:02:24,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 12:02:24,417 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 12:02:26,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:02:26,781 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 12:02:26,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:02:26,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2018-11-07 12:02:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:02:26,788 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 12:02:26,789 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 12:02:26,791 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 12:02:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 12:02:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 12:02:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 12:02:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 12:02:26,832 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 95 [2018-11-07 12:02:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:02:26,833 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 12:02:26,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 12:02:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 12:02:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-07 12:02:26,836 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:02:26,836 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 12:02:26,837 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:02:26,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1939267164, now seen corresponding path program 1 times [2018-11-07 12:02:26,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:02:26,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:26,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:02:26,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:26,839 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:02:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:02:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:02:27,049 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:02:27,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 12:02:27,049 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:02:27,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 12:02:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 12:02:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:02:27,056 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-07 12:02:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:02:31,410 INFO L93 Difference]: Finished difference Result 2350 states and 4011 transitions. [2018-11-07 12:02:31,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 12:02:31,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2018-11-07 12:02:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:02:31,432 INFO L225 Difference]: With dead ends: 2350 [2018-11-07 12:02:31,432 INFO L226 Difference]: Without dead ends: 1731 [2018-11-07 12:02:31,441 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:02:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-11-07 12:02:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-11-07 12:02:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-11-07 12:02:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2640 transitions. [2018-11-07 12:02:31,528 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2640 transitions. Word has length 104 [2018-11-07 12:02:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:02:31,529 INFO L480 AbstractCegarLoop]: Abstraction has 1731 states and 2640 transitions. [2018-11-07 12:02:31,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 12:02:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2640 transitions. [2018-11-07 12:02:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-11-07 12:02:31,546 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:02:31,547 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1] [2018-11-07 12:02:31,547 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:02:31,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:31,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1125198180, now seen corresponding path program 1 times [2018-11-07 12:02:31,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:02:31,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:31,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:02:31,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:31,550 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:02:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:02:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-07 12:02:31,856 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:02:31,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 12:02:31,857 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:02:31,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 12:02:31,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 12:02:31,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:02:31,858 INFO L87 Difference]: Start difference. First operand 1731 states and 2640 transitions. Second operand 3 states. [2018-11-07 12:02:33,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:02:33,266 INFO L93 Difference]: Finished difference Result 4928 states and 7680 transitions. [2018-11-07 12:02:33,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 12:02:33,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 214 [2018-11-07 12:02:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:02:33,300 INFO L225 Difference]: With dead ends: 4928 [2018-11-07 12:02:33,301 INFO L226 Difference]: Without dead ends: 3203 [2018-11-07 12:02:33,323 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:02:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2018-11-07 12:02:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 3203. [2018-11-07 12:02:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3203 states. [2018-11-07 12:02:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4752 transitions. [2018-11-07 12:02:33,461 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4752 transitions. Word has length 214 [2018-11-07 12:02:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:02:33,462 INFO L480 AbstractCegarLoop]: Abstraction has 3203 states and 4752 transitions. [2018-11-07 12:02:33,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 12:02:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4752 transitions. [2018-11-07 12:02:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-11-07 12:02:33,474 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:02:33,474 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-11-07 12:02:33,475 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:02:33,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:33,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1192909764, now seen corresponding path program 1 times [2018-11-07 12:02:33,475 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:02:33,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:33,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:02:33,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:02:33,477 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:02:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:02:33,890 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-11-07 12:02:34,128 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-07 12:02:34,868 WARN L179 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2018-11-07 12:02:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:02:35,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 12:02:35,532 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 12:02:35,533 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 227 with the following transitions: [2018-11-07 12:02:35,536 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [586], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 12:02:35,591 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 12:02:35,591 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 12:02:36,795 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 12:02:47,823 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 12:02:47,825 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 12:02:47,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:02:47,850 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 12:02:57,667 INFO L227 lantSequenceWeakener]: Weakened 217 states. On average, predicates are now at 77.3% of their original sizes. [2018-11-07 12:02:57,668 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 12:02:57,985 INFO L415 sIntCurrentIteration]: We unified 225 AI predicates to 225 [2018-11-07 12:02:57,985 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 12:02:57,986 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 12:02:57,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2018-11-07 12:02:57,987 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:02:57,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 12:02:57,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 12:02:57,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 12:02:57,988 INFO L87 Difference]: Start difference. First operand 3203 states and 4752 transitions. Second operand 7 states. [2018-11-07 12:06:17,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:06:17,614 INFO L93 Difference]: Finished difference Result 6585 states and 9782 transitions. [2018-11-07 12:06:17,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:06:17,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 226 [2018-11-07 12:06:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:06:17,637 INFO L225 Difference]: With dead ends: 6585 [2018-11-07 12:06:17,638 INFO L226 Difference]: Without dead ends: 3388 [2018-11-07 12:06:17,658 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 226 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 12:06:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3388 states. [2018-11-07 12:06:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3388 to 3386. [2018-11-07 12:06:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3386 states. [2018-11-07 12:06:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 4943 transitions. [2018-11-07 12:06:17,759 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 4943 transitions. Word has length 226 [2018-11-07 12:06:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:06:17,760 INFO L480 AbstractCegarLoop]: Abstraction has 3386 states and 4943 transitions. [2018-11-07 12:06:17,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 12:06:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 4943 transitions. [2018-11-07 12:06:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-11-07 12:06:17,771 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:06:17,771 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 12:06:17,772 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:06:17,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:06:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1312706291, now seen corresponding path program 1 times [2018-11-07 12:06:17,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:06:17,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:06:17,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:06:17,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:06:17,774 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:06:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:06:18,330 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 12:06:18,542 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 12:06:18,759 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 12:06:19,277 WARN L179 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-07 12:06:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 127 proven. 170 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 12:06:19,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 12:06:19,759 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 12:06:19,759 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 312 with the following transitions: [2018-11-07 12:06:19,760 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [586], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 12:06:19,767 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 12:06:19,767 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 12:06:20,034 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown