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-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 17:58:25,802 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 17:58:25,804 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 17:58:25,817 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 17:58:25,817 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 17:58:25,818 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 17:58:25,819 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 17:58:25,821 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 17:58:25,823 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 17:58:25,824 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 17:58:25,825 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 17:58:25,825 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 17:58:25,828 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 17:58:25,829 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 17:58:25,830 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 17:58:25,833 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 17:58:25,834 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 17:58:25,836 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 17:58:25,844 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 17:58:25,845 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 17:58:25,848 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 17:58:25,850 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 17:58:25,854 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 17:58:25,854 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 17:58:25,854 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 17:58:25,855 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 17:58:25,856 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 17:58:25,858 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 17:58:25,859 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 17:58:25,861 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 17:58:25,862 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 17:58:25,862 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 17:58:25,864 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 17:58:25,864 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 17:58:25,865 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 17:58:25,866 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 17:58:25,867 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-LIM.epf [2018-11-07 17:58:25,889 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 17:58:25,892 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 17:58:25,893 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 17:58:25,893 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 17:58:25,893 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 17:58:25,897 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 17:58:25,897 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 17:58:25,897 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 17:58:25,898 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 17:58:25,898 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 17:58:25,898 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 17:58:25,898 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 17:58:25,898 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 17:58:25,899 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 17:58:25,900 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 17:58:25,900 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 17:58:25,900 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 17:58:25,900 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 17:58:25,900 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 17:58:25,901 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 17:58:25,901 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 17:58:25,901 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 17:58:25,901 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 17:58:25,901 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 17:58:25,902 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 17:58:25,904 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 17:58:25,904 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 17:58:25,904 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 17:58:25,904 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 17:58:25,904 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 17:58:25,905 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 17:58:25,905 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 17:58:25,905 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 17:58:25,905 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 17:58:25,905 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 17:58:25,963 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 17:58:25,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 17:58:25,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 17:58:25,982 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 17:58:25,983 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 17:58:25,984 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08_false-unreach-call_false-termination.c [2018-11-07 17:58:26,055 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45ed4b7ef/2d506dee15e143c4aa798c065f56d329/FLAGa3db1b59f [2018-11-07 17:58:26,609 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 17:58:26,610 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label08_false-unreach-call_false-termination.c [2018-11-07 17:58:26,627 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45ed4b7ef/2d506dee15e143c4aa798c065f56d329/FLAGa3db1b59f [2018-11-07 17:58:26,652 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45ed4b7ef/2d506dee15e143c4aa798c065f56d329 [2018-11-07 17:58:26,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 17:58:26,668 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 17:58:26,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 17:58:26,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 17:58:26,673 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 17:58:26,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:58:26" (1/1) ... [2018-11-07 17:58:26,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f80c201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:26, skipping insertion in model container [2018-11-07 17:58:26,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:58:26" (1/1) ... [2018-11-07 17:58:26,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 17:58:26,768 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 17:58:27,258 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 17:58:27,264 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 17:58:27,444 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 17:58:27,472 INFO L193 MainTranslator]: Completed translation [2018-11-07 17:58:27,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27 WrapperNode [2018-11-07 17:58:27,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 17:58:27,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 17:58:27,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 17:58:27,474 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 17:58:27,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (1/1) ... [2018-11-07 17:58:27,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (1/1) ... [2018-11-07 17:58:27,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 17:58:27,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 17:58:27,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 17:58:27,641 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 17:58:27,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (1/1) ... [2018-11-07 17:58:27,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (1/1) ... [2018-11-07 17:58:27,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (1/1) ... [2018-11-07 17:58:27,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (1/1) ... [2018-11-07 17:58:27,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (1/1) ... [2018-11-07 17:58:27,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (1/1) ... [2018-11-07 17:58:27,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (1/1) ... [2018-11-07 17:58:27,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 17:58:27,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 17:58:27,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 17:58:27,759 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 17:58:27,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (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 17:58:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 17:58:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 17:58:27,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 17:58:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 17:58:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 17:58:27,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 17:58:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 17:58:27,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 17:58:27,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 17:58:31,245 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 17:58:31,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:58:31 BoogieIcfgContainer [2018-11-07 17:58:31,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 17:58:31,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 17:58:31,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 17:58:31,251 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 17:58:31,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:58:26" (1/3) ... [2018-11-07 17:58:31,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466ad28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:58:31, skipping insertion in model container [2018-11-07 17:58:31,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:27" (2/3) ... [2018-11-07 17:58:31,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466ad28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:58:31, skipping insertion in model container [2018-11-07 17:58:31,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:58:31" (3/3) ... [2018-11-07 17:58:31,255 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label08_false-unreach-call_false-termination.c [2018-11-07 17:58:31,264 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 17:58:31,272 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 17:58:31,286 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 17:58:31,325 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 17:58:31,325 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 17:58:31,325 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 17:58:31,325 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 17:58:31,326 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 17:58:31,327 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 17:58:31,327 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 17:58:31,327 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 17:58:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 17:58:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-07 17:58:31,365 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:58:31,366 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:58:31,369 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:58:31,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:58:31,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1967865695, now seen corresponding path program 1 times [2018-11-07 17:58:31,377 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:58:31,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:31,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:58:31,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:31,426 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:58:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:58:31,782 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 17:58:31,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:58:31,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 17:58:31,785 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:58:31,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 17:58:31,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 17:58:31,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 17:58:31,813 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 17:58:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:58:33,478 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 17:58:33,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 17:58:33,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-11-07 17:58:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:58:33,499 INFO L225 Difference]: With dead ends: 691 [2018-11-07 17:58:33,499 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 17:58:33,508 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 17:58:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 17:58:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 17:58:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 17:58:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 17:58:33,589 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 19 [2018-11-07 17:58:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:58:33,590 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 17:58:33,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 17:58:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 17:58:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-07 17:58:33,596 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:58:33,596 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 17:58:33,596 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:58:33,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:58:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash 996215900, now seen corresponding path program 1 times [2018-11-07 17:58:33,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:58:33,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:33,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:58:33,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:33,599 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:58:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:58:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:58:33,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:58:33,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 17:58:33,963 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:58:33,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 17:58:33,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 17:58:33,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 17:58:33,966 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 17:58:37,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:58:37,521 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-11-07 17:58:37,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 17:58:37,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2018-11-07 17:58:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:58:37,536 INFO L225 Difference]: With dead ends: 1588 [2018-11-07 17:58:37,536 INFO L226 Difference]: Without dead ends: 1160 [2018-11-07 17:58:37,544 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 17:58:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-11-07 17:58:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-11-07 17:58:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-11-07 17:58:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-11-07 17:58:37,634 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 89 [2018-11-07 17:58:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:58:37,635 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-11-07 17:58:37,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 17:58:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-11-07 17:58:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-07 17:58:37,639 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:58:37,640 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 17:58:37,640 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:58:37,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:58:37,640 INFO L82 PathProgramCache]: Analyzing trace with hash 443394711, now seen corresponding path program 1 times [2018-11-07 17:58:37,641 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:58:37,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:37,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:58:37,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:37,642 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:58:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:58:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:58:37,894 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:58:37,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 17:58:37,895 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:58:37,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 17:58:37,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 17:58:37,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 17:58:37,896 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-11-07 17:58:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:58:40,460 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-11-07 17:58:40,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 17:58:40,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2018-11-07 17:58:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:58:40,481 INFO L225 Difference]: With dead ends: 2716 [2018-11-07 17:58:40,481 INFO L226 Difference]: Without dead ends: 1569 [2018-11-07 17:58:40,489 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 17:58:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-11-07 17:58:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-11-07 17:58:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-11-07 17:58:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-11-07 17:58:40,559 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 90 [2018-11-07 17:58:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:58:40,559 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-11-07 17:58:40,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 17:58:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-11-07 17:58:40,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-11-07 17:58:40,563 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:58:40,564 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 17:58:40,565 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:58:40,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:58:40,566 INFO L82 PathProgramCache]: Analyzing trace with hash 48842683, now seen corresponding path program 1 times [2018-11-07 17:58:40,566 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:58:40,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:40,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:58:40,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:40,567 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:58:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:58:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:58:40,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:58:40,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 17:58:40,717 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:58:40,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 17:58:40,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 17:58:40,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 17:58:40,718 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-11-07 17:58:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:58:43,127 INFO L93 Difference]: Finished difference Result 4198 states and 6461 transitions. [2018-11-07 17:58:43,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 17:58:43,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2018-11-07 17:58:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:58:43,147 INFO L225 Difference]: With dead ends: 4198 [2018-11-07 17:58:43,148 INFO L226 Difference]: Without dead ends: 2666 [2018-11-07 17:58:43,159 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 17:58:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2018-11-07 17:58:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2560. [2018-11-07 17:58:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2560 states. [2018-11-07 17:58:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3629 transitions. [2018-11-07 17:58:43,237 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3629 transitions. Word has length 92 [2018-11-07 17:58:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:58:43,238 INFO L480 AbstractCegarLoop]: Abstraction has 2560 states and 3629 transitions. [2018-11-07 17:58:43,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 17:58:43,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3629 transitions. [2018-11-07 17:58:43,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-07 17:58:43,240 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:58:43,240 INFO L375 BasicCegarLoop]: trace histogram [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 17:58:43,241 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:58:43,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:58:43,241 INFO L82 PathProgramCache]: Analyzing trace with hash 199443236, now seen corresponding path program 1 times [2018-11-07 17:58:43,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:58:43,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:43,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:58:43,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:43,243 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:58:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:58:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:58:43,442 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:58:43,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 17:58:43,443 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:58:43,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 17:58:43,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 17:58:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 17:58:43,444 INFO L87 Difference]: Start difference. First operand 2560 states and 3629 transitions. Second operand 4 states. [2018-11-07 17:58:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:58:45,683 INFO L93 Difference]: Finished difference Result 7205 states and 10610 transitions. [2018-11-07 17:58:45,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 17:58:45,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2018-11-07 17:58:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:58:45,710 INFO L225 Difference]: With dead ends: 7205 [2018-11-07 17:58:45,711 INFO L226 Difference]: Without dead ends: 4651 [2018-11-07 17:58:45,731 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 17:58:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2018-11-07 17:58:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651. [2018-11-07 17:58:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4651 states. [2018-11-07 17:58:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 6458 transitions. [2018-11-07 17:58:45,903 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 6458 transitions. Word has length 93 [2018-11-07 17:58:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:58:45,904 INFO L480 AbstractCegarLoop]: Abstraction has 4651 states and 6458 transitions. [2018-11-07 17:58:45,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 17:58:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 6458 transitions. [2018-11-07 17:58:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-07 17:58:45,920 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:58:45,920 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 17:58:45,920 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:58:45,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:58:45,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2080310447, now seen corresponding path program 1 times [2018-11-07 17:58:45,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:58:45,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:45,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:58:45,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:45,922 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:58:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:58:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-11-07 17:58:46,195 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:58:46,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 17:58:46,195 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:58:46,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 17:58:46,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 17:58:46,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 17:58:46,196 INFO L87 Difference]: Start difference. First operand 4651 states and 6458 transitions. Second operand 3 states. [2018-11-07 17:58:47,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:58:47,686 INFO L93 Difference]: Finished difference Result 10803 states and 15809 transitions. [2018-11-07 17:58:47,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 17:58:47,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2018-11-07 17:58:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:58:47,723 INFO L225 Difference]: With dead ends: 10803 [2018-11-07 17:58:47,723 INFO L226 Difference]: Without dead ends: 6532 [2018-11-07 17:58:47,753 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 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 17:58:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2018-11-07 17:58:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6532. [2018-11-07 17:58:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6532 states. [2018-11-07 17:58:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 9111 transitions. [2018-11-07 17:58:47,937 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 9111 transitions. Word has length 237 [2018-11-07 17:58:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:58:47,938 INFO L480 AbstractCegarLoop]: Abstraction has 6532 states and 9111 transitions. [2018-11-07 17:58:47,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 17:58:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 9111 transitions. [2018-11-07 17:58:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-11-07 17:58:47,958 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:58:47,959 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 17:58:47,959 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:58:47,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:58:47,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1716679298, now seen corresponding path program 1 times [2018-11-07 17:58:47,960 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:58:47,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:47,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:58:47,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:47,965 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:58:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:58:48,574 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-07 17:58:48,793 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2018-11-07 17:58:49,063 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-11-07 17:58:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:58:49,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:58:49,632 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:58:49,633 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 263 with the following transitions: [2018-11-07 17:58:49,637 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 17:58:49,697 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:58:49,698 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:58:50,335 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:58:50,418 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:58:50,420 INFO L272 AbstractInterpreter]: Visited 135 different actions 135 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 17:58:50,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:58:50,470 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:58:51,188 INFO L227 lantSequenceWeakener]: Weakened 253 states. On average, predicates are now at 77.28% of their original sizes. [2018-11-07 17:58:51,189 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:58:51,551 INFO L415 sIntCurrentIteration]: We unified 261 AI predicates to 261 [2018-11-07 17:58:51,551 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:58:51,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:58:51,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2018-11-07 17:58:51,553 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:58:51,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 17:58:51,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 17:58:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 17:58:51,555 INFO L87 Difference]: Start difference. First operand 6532 states and 9111 transitions. Second operand 7 states. [2018-11-07 17:59:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:59:06,743 INFO L93 Difference]: Finished difference Result 13243 states and 18447 transitions. [2018-11-07 17:59:06,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 17:59:06,743 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 262 [2018-11-07 17:59:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:59:06,775 INFO L225 Difference]: With dead ends: 13243 [2018-11-07 17:59:06,775 INFO L226 Difference]: Without dead ends: 6717 [2018-11-07 17:59:06,801 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 262 GetRequests, 256 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 17:59:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2018-11-07 17:59:06,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 6715. [2018-11-07 17:59:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6715 states. [2018-11-07 17:59:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 9302 transitions. [2018-11-07 17:59:06,980 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 9302 transitions. Word has length 262 [2018-11-07 17:59:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:59:06,981 INFO L480 AbstractCegarLoop]: Abstraction has 6715 states and 9302 transitions. [2018-11-07 17:59:06,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 17:59:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 9302 transitions. [2018-11-07 17:59:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-11-07 17:59:07,002 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:59:07,002 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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 17:59:07,003 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:59:07,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:07,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1519194548, now seen corresponding path program 1 times [2018-11-07 17:59:07,003 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:59:07,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:07,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:59:07,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:07,005 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:59:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:59:07,522 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 17:59:07,731 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 17:59:07,974 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 17:59:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 124 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 17:59:08,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:59:08,665 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:59:08,665 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 348 with the following transitions: [2018-11-07 17:59:08,666 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 17:59:08,671 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:59:08,672 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:59:08,787 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:59:08,936 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:59:08,936 INFO L272 AbstractInterpreter]: Visited 139 different actions 271 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 17:59:08,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:08,956 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:59:09,848 INFO L227 lantSequenceWeakener]: Weakened 132 states. On average, predicates are now at 77.6% of their original sizes. [2018-11-07 17:59:09,848 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:59:11,393 INFO L415 sIntCurrentIteration]: We unified 346 AI predicates to 346 [2018-11-07 17:59:11,394 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:59:11,394 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:59:11,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [12] total 35 [2018-11-07 17:59:11,395 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:59:11,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-07 17:59:11,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-07 17:59:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-11-07 17:59:11,399 INFO L87 Difference]: Start difference. First operand 6715 states and 9302 transitions. Second operand 25 states. [2018-11-07 17:59:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:59:36,431 INFO L93 Difference]: Finished difference Result 13581 states and 18753 transitions. [2018-11-07 17:59:36,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-07 17:59:36,431 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 347 [2018-11-07 17:59:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:59:36,464 INFO L225 Difference]: With dead ends: 13581 [2018-11-07 17:59:36,464 INFO L226 Difference]: Without dead ends: 6720 [2018-11-07 17:59:36,486 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 361 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2018-11-07 17:59:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2018-11-07 17:59:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 6715. [2018-11-07 17:59:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6715 states. [2018-11-07 17:59:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 9296 transitions. [2018-11-07 17:59:37,393 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 9296 transitions. Word has length 347 [2018-11-07 17:59:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:59:37,394 INFO L480 AbstractCegarLoop]: Abstraction has 6715 states and 9296 transitions. [2018-11-07 17:59:37,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-07 17:59:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 9296 transitions. [2018-11-07 17:59:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-11-07 17:59:37,417 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:59:37,417 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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 17:59:37,417 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:59:37,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:37,418 INFO L82 PathProgramCache]: Analyzing trace with hash -719461640, now seen corresponding path program 1 times [2018-11-07 17:59:37,418 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:59:37,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:37,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:59:37,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:37,420 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:59:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:59:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 49 proven. 317 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 17:59:38,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:59:38,656 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:59:38,657 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 374 with the following transitions: [2018-11-07 17:59:38,657 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 17:59:38,661 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:59:38,662 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:59:38,740 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:59:38,898 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:59:38,898 INFO L272 AbstractInterpreter]: Visited 139 different actions 272 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 17:59:38,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:38,915 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:59:39,321 INFO L227 lantSequenceWeakener]: Weakened 37 states. On average, predicates are now at 78.43% of their original sizes. [2018-11-07 17:59:39,322 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:59:39,688 INFO L415 sIntCurrentIteration]: We unified 372 AI predicates to 372 [2018-11-07 17:59:39,688 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:59:39,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:59:39,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [15] total 33 [2018-11-07 17:59:39,689 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:59:39,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 17:59:39,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 17:59:39,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-11-07 17:59:39,691 INFO L87 Difference]: Start difference. First operand 6715 states and 9296 transitions. Second operand 20 states. [2018-11-07 17:59:58,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:59:58,308 INFO L93 Difference]: Finished difference Result 13246 states and 18416 transitions. [2018-11-07 17:59:58,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 17:59:58,309 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 373 [2018-11-07 17:59:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:59:58,347 INFO L225 Difference]: With dead ends: 13246 [2018-11-07 17:59:58,348 INFO L226 Difference]: Without dead ends: 6720 [2018-11-07 17:59:58,363 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 388 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2018-11-07 17:59:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2018-11-07 17:59:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 6715. [2018-11-07 17:59:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6715 states. [2018-11-07 17:59:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 9238 transitions. [2018-11-07 17:59:58,509 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 9238 transitions. Word has length 373 [2018-11-07 17:59:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:59:58,509 INFO L480 AbstractCegarLoop]: Abstraction has 6715 states and 9238 transitions. [2018-11-07 17:59:58,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 17:59:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 9238 transitions. [2018-11-07 17:59:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-11-07 17:59:58,537 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:59:58,537 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-07 17:59:58,538 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:59:58,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:58,538 INFO L82 PathProgramCache]: Analyzing trace with hash 704346386, now seen corresponding path program 1 times [2018-11-07 17:59:58,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:59:58,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:58,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:59:58,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:58,540 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:59:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:59:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 141 proven. 166 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-11-07 17:59:59,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:59:59,271 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:59:59,271 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 459 with the following transitions: [2018-11-07 17:59:59,272 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 17:59:59,281 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:59:59,281 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:59:59,390 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:59:59,781 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:59:59,782 INFO L272 AbstractInterpreter]: Visited 140 different actions 418 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 17:59:59,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:59,819 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:00:00,315 INFO L227 lantSequenceWeakener]: Weakened 172 states. On average, predicates are now at 77.52% of their original sizes. [2018-11-07 18:00:00,316 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:00:00,848 INFO L415 sIntCurrentIteration]: We unified 457 AI predicates to 457 [2018-11-07 18:00:00,848 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:00:00,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:00:00,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-07 18:00:00,849 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:00:00,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 18:00:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 18:00:00,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2018-11-07 18:00:00,850 INFO L87 Difference]: Start difference. First operand 6715 states and 9238 transitions. Second operand 22 states. [2018-11-07 18:00:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:00:21,030 INFO L93 Difference]: Finished difference Result 14052 states and 19198 transitions. [2018-11-07 18:00:21,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 18:00:21,031 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 458 [2018-11-07 18:00:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:00:21,054 INFO L225 Difference]: With dead ends: 14052 [2018-11-07 18:00:21,054 INFO L226 Difference]: Without dead ends: 6718 [2018-11-07 18:00:21,070 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 478 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2018-11-07 18:00:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2018-11-07 18:00:21,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 6713. [2018-11-07 18:00:21,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6713 states. [2018-11-07 18:00:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6713 states to 6713 states and 9215 transitions. [2018-11-07 18:00:21,199 INFO L78 Accepts]: Start accepts. Automaton has 6713 states and 9215 transitions. Word has length 458 [2018-11-07 18:00:21,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:00:21,200 INFO L480 AbstractCegarLoop]: Abstraction has 6713 states and 9215 transitions. [2018-11-07 18:00:21,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 18:00:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 6713 states and 9215 transitions. [2018-11-07 18:00:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-11-07 18:00:21,226 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:00:21,227 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-11-07 18:00:21,227 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:00:21,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:21,227 INFO L82 PathProgramCache]: Analyzing trace with hash -355158003, now seen corresponding path program 1 times [2018-11-07 18:00:21,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:00:21,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:21,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:00:21,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:21,229 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:00:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:00:22,371 WARN L179 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-11-07 18:00:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 386 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-07 18:00:22,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:00:22,798 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:00:22,799 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 484 with the following transitions: [2018-11-07 18:00:22,799 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:00:22,802 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:00:22,802 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:00:22,927 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:00:23,156 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:00:23,156 INFO L272 AbstractInterpreter]: Visited 140 different actions 417 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:00:23,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:23,165 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:00:23,544 INFO L227 lantSequenceWeakener]: Weakened 480 states. On average, predicates are now at 80.03% of their original sizes. [2018-11-07 18:00:23,544 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:00:23,661 INFO L415 sIntCurrentIteration]: We unified 482 AI predicates to 482 [2018-11-07 18:00:23,661 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:00:23,662 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:00:23,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 18:00:23,662 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:00:23,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:00:23,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:00:23,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:00:23,663 INFO L87 Difference]: Start difference. First operand 6713 states and 9215 transitions. Second operand 10 states. [2018-11-07 18:00:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:00:28,820 INFO L93 Difference]: Finished difference Result 14005 states and 19632 transitions. [2018-11-07 18:00:28,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:00:28,820 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 483 [2018-11-07 18:00:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:00:28,848 INFO L225 Difference]: With dead ends: 14005 [2018-11-07 18:00:28,849 INFO L226 Difference]: Without dead ends: 7853 [2018-11-07 18:00:28,865 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 490 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:00:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7853 states. [2018-11-07 18:00:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7853 to 7640. [2018-11-07 18:00:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7640 states. [2018-11-07 18:00:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7640 states to 7640 states and 10396 transitions. [2018-11-07 18:00:29,017 INFO L78 Accepts]: Start accepts. Automaton has 7640 states and 10396 transitions. Word has length 483 [2018-11-07 18:00:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:00:29,018 INFO L480 AbstractCegarLoop]: Abstraction has 7640 states and 10396 transitions. [2018-11-07 18:00:29,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:00:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 7640 states and 10396 transitions. [2018-11-07 18:00:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2018-11-07 18:00:29,048 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:00:29,049 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:00:29,049 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:00:29,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:29,050 INFO L82 PathProgramCache]: Analyzing trace with hash 656789916, now seen corresponding path program 1 times [2018-11-07 18:00:29,050 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:00:29,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:29,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:00:29,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:29,051 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:00:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:00:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 282 proven. 339 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:00:31,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:00:31,181 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:00:31,181 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 551 with the following transitions: [2018-11-07 18:00:31,181 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:00:31,184 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:00:31,185 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:00:31,347 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:00:32,028 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:00:32,028 INFO L272 AbstractInterpreter]: Visited 191 different actions 954 times. Merged at 9 different actions 47 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:00:32,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:32,038 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:00:32,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:00:32,038 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:00:32,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:00:32,049 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:00:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:00:32,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:00:33,089 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 8 [2018-11-07 18:00:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 608 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-11-07 18:00:33,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:00:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 280 proven. 129 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-07 18:00:34,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:00:34,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-07 18:00:34,796 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:00:34,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:00:34,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:00:34,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:00:34,800 INFO L87 Difference]: Start difference. First operand 7640 states and 10396 transitions. Second operand 17 states. [2018-11-07 18:00:36,651 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2018-11-07 18:00:37,169 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2018-11-07 18:00:38,279 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-07 18:00:38,612 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-07 18:00:40,295 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-11-07 18:00:41,706 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2018-11-07 18:00:46,051 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2018-11-07 18:00:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:00:46,980 INFO L93 Difference]: Finished difference Result 18765 states and 27140 transitions. [2018-11-07 18:00:46,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-07 18:00:46,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 550 [2018-11-07 18:00:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:00:47,030 INFO L225 Difference]: With dead ends: 18765 [2018-11-07 18:00:47,030 INFO L226 Difference]: Without dead ends: 11686 [2018-11-07 18:00:47,089 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1198 GetRequests, 1133 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-07 18:00:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11686 states. [2018-11-07 18:00:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11686 to 11220. [2018-11-07 18:00:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11220 states. [2018-11-07 18:00:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11220 states to 11220 states and 15069 transitions. [2018-11-07 18:00:47,482 INFO L78 Accepts]: Start accepts. Automaton has 11220 states and 15069 transitions. Word has length 550 [2018-11-07 18:00:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:00:47,482 INFO L480 AbstractCegarLoop]: Abstraction has 11220 states and 15069 transitions. [2018-11-07 18:00:47,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:00:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 11220 states and 15069 transitions. [2018-11-07 18:00:47,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2018-11-07 18:00:47,509 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:00:47,510 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 18:00:47,510 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:00:47,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:47,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1233386891, now seen corresponding path program 1 times [2018-11-07 18:00:47,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:00:47,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:47,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:00:47,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:47,513 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:00:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:00:48,117 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:00:48,929 WARN L179 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 18:00:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 379 proven. 458 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-11-07 18:00:50,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:00:50,531 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:00:50,531 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 557 with the following transitions: [2018-11-07 18:00:50,532 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:00:50,534 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:00:50,534 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:00:50,742 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:00:51,347 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:00:51,347 INFO L272 AbstractInterpreter]: Visited 142 different actions 705 times. Merged at 9 different actions 42 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:00:51,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:51,354 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:00:51,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:00:51,355 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:00:51,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:00:51,363 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:00:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:00:51,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:00:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 752 proven. 2 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2018-11-07 18:00:52,043 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:00:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 373 proven. 112 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2018-11-07 18:00:52,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:00:52,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-07 18:00:52,778 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:00:52,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:00:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:00:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:00:52,781 INFO L87 Difference]: Start difference. First operand 11220 states and 15069 transitions. Second operand 17 states. [2018-11-07 18:00:58,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:00:58,942 INFO L93 Difference]: Finished difference Result 21982 states and 31920 transitions. [2018-11-07 18:00:58,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 18:00:58,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 556 [2018-11-07 18:00:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:00:58,992 INFO L225 Difference]: With dead ends: 21982 [2018-11-07 18:00:58,992 INFO L226 Difference]: Without dead ends: 10056 [2018-11-07 18:00:59,032 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1168 GetRequests, 1122 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2018-11-07 18:00:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10056 states. [2018-11-07 18:00:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10056 to 9834. [2018-11-07 18:00:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9834 states. [2018-11-07 18:00:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 11782 transitions. [2018-11-07 18:00:59,273 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 11782 transitions. Word has length 556 [2018-11-07 18:00:59,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:00:59,274 INFO L480 AbstractCegarLoop]: Abstraction has 9834 states and 11782 transitions. [2018-11-07 18:00:59,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:00:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 11782 transitions. [2018-11-07 18:00:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-11-07 18:00:59,294 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:00:59,295 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:00:59,295 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:00:59,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1166185568, now seen corresponding path program 2 times [2018-11-07 18:00:59,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:00:59,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:59,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:00:59,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:59,297 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:00:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 411 proven. 129 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-07 18:01:00,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:00,012 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:00,013 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 18:01:00,013 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 18:01:00,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:00,013 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:00,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 18:01:00,024 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 18:01:00,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-07 18:01:00,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 18:01:00,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 731 proven. 6 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2018-11-07 18:01:00,494 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 731 proven. 129 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-07 18:01:01,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:01,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 14 [2018-11-07 18:01:01,140 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:01,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:01:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:01:01,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:01:01,143 INFO L87 Difference]: Start difference. First operand 9834 states and 11782 transitions. Second operand 9 states. [2018-11-07 18:01:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:04,285 INFO L93 Difference]: Finished difference Result 26542 states and 42222 transitions. [2018-11-07 18:01:04,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 18:01:04,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 661 [2018-11-07 18:01:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:04,460 INFO L225 Difference]: With dead ends: 26542 [2018-11-07 18:01:04,460 INFO L226 Difference]: Without dead ends: 17269 [2018-11-07 18:01:04,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1338 GetRequests, 1318 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:01:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2018-11-07 18:01:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 16610. [2018-11-07 18:01:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16610 states. [2018-11-07 18:01:05,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16610 states to 16610 states and 20716 transitions. [2018-11-07 18:01:05,158 INFO L78 Accepts]: Start accepts. Automaton has 16610 states and 20716 transitions. Word has length 661 [2018-11-07 18:01:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:05,159 INFO L480 AbstractCegarLoop]: Abstraction has 16610 states and 20716 transitions. [2018-11-07 18:01:05,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:01:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 16610 states and 20716 transitions. [2018-11-07 18:01:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2018-11-07 18:01:05,171 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:05,171 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 18:01:05,172 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:05,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:05,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1979428279, now seen corresponding path program 1 times [2018-11-07 18:01:05,172 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:05,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:05,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 18:01:05,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:05,173 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 418 proven. 129 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-11-07 18:01:06,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:06,066 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:06,066 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 669 with the following transitions: [2018-11-07 18:01:06,066 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:06,069 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:06,069 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:01:06,252 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:01:07,016 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:01:07,016 INFO L272 AbstractInterpreter]: Visited 192 different actions 966 times. Merged at 10 different actions 54 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:01:07,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:07,019 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:01:07,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:07,020 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:07,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:07,031 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:07,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 859 proven. 2 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-11-07 18:01:07,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 418 proven. 129 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-11-07 18:01:08,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:08,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:01:08,794 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:08,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:01:08,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:01:08,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:01:08,795 INFO L87 Difference]: Start difference. First operand 16610 states and 20716 transitions. Second operand 7 states. [2018-11-07 18:01:11,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:11,317 INFO L93 Difference]: Finished difference Result 36686 states and 51341 transitions. [2018-11-07 18:01:11,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:01:11,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 668 [2018-11-07 18:01:11,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:11,469 INFO L225 Difference]: With dead ends: 36686 [2018-11-07 18:01:11,469 INFO L226 Difference]: Without dead ends: 20637 [2018-11-07 18:01:11,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1352 GetRequests, 1339 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:01:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20637 states. [2018-11-07 18:01:12,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20637 to 20118. [2018-11-07 18:01:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20118 states. [2018-11-07 18:01:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20118 states to 20118 states and 24694 transitions. [2018-11-07 18:01:12,166 INFO L78 Accepts]: Start accepts. Automaton has 20118 states and 24694 transitions. Word has length 668 [2018-11-07 18:01:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:12,167 INFO L480 AbstractCegarLoop]: Abstraction has 20118 states and 24694 transitions. [2018-11-07 18:01:12,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:01:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 20118 states and 24694 transitions. [2018-11-07 18:01:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2018-11-07 18:01:12,178 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:12,179 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 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 18:01:12,179 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:12,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:12,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2068627912, now seen corresponding path program 1 times [2018-11-07 18:01:12,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:12,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:12,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:12,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:12,181 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 417 proven. 622 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-11-07 18:01:13,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:13,884 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:13,884 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 714 with the following transitions: [2018-11-07 18:01:13,884 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:13,887 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:13,887 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:01:14,053 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:01:14,951 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:01:14,951 INFO L272 AbstractInterpreter]: Visited 192 different actions 965 times. Merged at 10 different actions 53 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:01:14,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:14,958 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:01:14,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:14,958 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:14,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:14,967 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:15,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 916 proven. 2 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-11-07 18:01:15,921 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:16,125 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2018-11-07 18:01:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 463 proven. 129 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2018-11-07 18:01:16,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:16,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-07 18:01:16,780 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:16,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:01:16,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:01:16,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:01:16,781 INFO L87 Difference]: Start difference. First operand 20118 states and 24694 transitions. Second operand 17 states. [2018-11-07 18:01:20,166 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-07 18:01:21,505 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-07 18:01:22,932 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-11-07 18:01:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:24,722 INFO L93 Difference]: Finished difference Result 40408 states and 50298 transitions. [2018-11-07 18:01:24,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-07 18:01:24,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 713 [2018-11-07 18:01:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:24,787 INFO L225 Difference]: With dead ends: 40408 [2018-11-07 18:01:24,787 INFO L226 Difference]: Without dead ends: 20483 [2018-11-07 18:01:24,847 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1498 GetRequests, 1448 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-07 18:01:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20483 states. [2018-11-07 18:01:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 20243. [2018-11-07 18:01:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20243 states. [2018-11-07 18:01:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20243 states to 20243 states and 24399 transitions. [2018-11-07 18:01:25,385 INFO L78 Accepts]: Start accepts. Automaton has 20243 states and 24399 transitions. Word has length 713 [2018-11-07 18:01:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:25,386 INFO L480 AbstractCegarLoop]: Abstraction has 20243 states and 24399 transitions. [2018-11-07 18:01:25,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:01:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 20243 states and 24399 transitions. [2018-11-07 18:01:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2018-11-07 18:01:25,397 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:25,398 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 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 18:01:25,398 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:25,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:25,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1657819962, now seen corresponding path program 1 times [2018-11-07 18:01:25,399 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:25,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:25,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:25,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:25,400 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 598 proven. 129 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2018-11-07 18:01:26,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:26,194 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:26,195 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 829 with the following transitions: [2018-11-07 18:01:26,195 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:26,198 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:26,198 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:01:26,362 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:01:27,244 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:01:27,244 INFO L272 AbstractInterpreter]: Visited 193 different actions 1171 times. Merged at 11 different actions 73 times. Widened at 1 different actions 2 times. Found 20 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:01:27,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:27,254 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:01:27,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:27,254 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:27,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:27,263 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:27,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 1164 proven. 2 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2018-11-07 18:01:28,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 598 proven. 129 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2018-11-07 18:01:28,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:28,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-07 18:01:28,551 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:28,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:01:28,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:01:28,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:01:28,552 INFO L87 Difference]: Start difference. First operand 20243 states and 24399 transitions. Second operand 6 states. [2018-11-07 18:01:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:30,345 INFO L93 Difference]: Finished difference Result 38710 states and 46579 transitions. [2018-11-07 18:01:30,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:01:30,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 828 [2018-11-07 18:01:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:30,395 INFO L225 Difference]: With dead ends: 38710 [2018-11-07 18:01:30,395 INFO L226 Difference]: Without dead ends: 18841 [2018-11-07 18:01:30,456 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1657 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:01:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18841 states. [2018-11-07 18:01:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18841 to 18207. [2018-11-07 18:01:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18207 states. [2018-11-07 18:01:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18207 states to 18207 states and 21005 transitions. [2018-11-07 18:01:30,761 INFO L78 Accepts]: Start accepts. Automaton has 18207 states and 21005 transitions. Word has length 828 [2018-11-07 18:01:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:30,761 INFO L480 AbstractCegarLoop]: Abstraction has 18207 states and 21005 transitions. [2018-11-07 18:01:30,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:01:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 18207 states and 21005 transitions. [2018-11-07 18:01:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2018-11-07 18:01:30,772 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:30,773 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:01:30,773 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:30,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:30,774 INFO L82 PathProgramCache]: Analyzing trace with hash 684951054, now seen corresponding path program 1 times [2018-11-07 18:01:30,774 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:30,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:30,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:30,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:30,775 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:31,760 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:01:31,972 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:01:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2332 backedges. 471 proven. 1176 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-11-07 18:01:34,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:34,021 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:34,022 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 924 with the following transitions: [2018-11-07 18:01:34,022 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:34,025 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:34,025 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:01:34,237 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:01:35,081 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:01:35,081 INFO L272 AbstractInterpreter]: Visited 194 different actions 982 times. Merged at 11 different actions 60 times. Widened at 1 different actions 1 times. Found 19 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:01:35,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:35,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:01:35,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:35,088 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:35,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:35,096 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:35,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2332 backedges. 1682 proven. 2 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-11-07 18:01:35,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2332 backedges. 472 proven. 378 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-07 18:01:36,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:36,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-07 18:01:36,737 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:36,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:01:36,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:01:36,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:01:36,739 INFO L87 Difference]: Start difference. First operand 18207 states and 21005 transitions. Second operand 18 states. [2018-11-07 18:01:37,754 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-11-07 18:01:42,890 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2018-11-07 18:01:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:45,224 INFO L93 Difference]: Finished difference Result 34884 states and 40386 transitions. [2018-11-07 18:01:45,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-07 18:01:45,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 923 [2018-11-07 18:01:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:45,251 INFO L225 Difference]: With dead ends: 34884 [2018-11-07 18:01:45,252 INFO L226 Difference]: Without dead ends: 17051 [2018-11-07 18:01:45,276 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1936 GetRequests, 1873 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=850, Invalid=3310, Unknown=0, NotChecked=0, Total=4160 [2018-11-07 18:01:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17051 states. [2018-11-07 18:01:45,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17051 to 16814. [2018-11-07 18:01:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16814 states. [2018-11-07 18:01:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16814 states to 16814 states and 18736 transitions. [2018-11-07 18:01:45,505 INFO L78 Accepts]: Start accepts. Automaton has 16814 states and 18736 transitions. Word has length 923 [2018-11-07 18:01:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:45,505 INFO L480 AbstractCegarLoop]: Abstraction has 16814 states and 18736 transitions. [2018-11-07 18:01:45,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:01:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 16814 states and 18736 transitions. [2018-11-07 18:01:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2018-11-07 18:01:45,519 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:45,519 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-07 18:01:45,519 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:45,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:45,520 INFO L82 PathProgramCache]: Analyzing trace with hash -954250275, now seen corresponding path program 1 times [2018-11-07 18:01:45,520 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:45,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:45,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:45,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:45,521 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2434 backedges. 1294 proven. 127 refuted. 0 times theorem prover too weak. 1013 trivial. 0 not checked. [2018-11-07 18:01:46,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:46,452 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:46,452 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 969 with the following transitions: [2018-11-07 18:01:46,453 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:46,460 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:46,460 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:01:46,671 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:01:47,834 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:01:47,835 INFO L272 AbstractInterpreter]: Visited 194 different actions 1171 times. Merged at 11 different actions 67 times. Widened at 1 different actions 2 times. Found 25 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:01:47,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:47,840 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:01:47,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:47,840 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:47,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:47,850 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:48,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2434 backedges. 1294 proven. 6 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2018-11-07 18:01:48,849 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2434 backedges. 1294 proven. 129 refuted. 0 times theorem prover too weak. 1011 trivial. 0 not checked. [2018-11-07 18:01:49,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:49,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2018-11-07 18:01:49,912 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:49,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:01:49,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:01:49,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:01:49,914 INFO L87 Difference]: Start difference. First operand 16814 states and 18736 transitions. Second operand 9 states. [2018-11-07 18:01:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:53,596 INFO L93 Difference]: Finished difference Result 38892 states and 43817 transitions. [2018-11-07 18:01:53,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 18:01:53,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 968 [2018-11-07 18:01:53,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:53,653 INFO L225 Difference]: With dead ends: 38892 [2018-11-07 18:01:53,653 INFO L226 Difference]: Without dead ends: 22452 [2018-11-07 18:01:53,681 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1962 GetRequests, 1939 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2018-11-07 18:01:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22452 states. [2018-11-07 18:01:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22452 to 20899. [2018-11-07 18:01:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20899 states. [2018-11-07 18:01:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20899 states to 20899 states and 23212 transitions. [2018-11-07 18:01:54,042 INFO L78 Accepts]: Start accepts. Automaton has 20899 states and 23212 transitions. Word has length 968 [2018-11-07 18:01:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:54,043 INFO L480 AbstractCegarLoop]: Abstraction has 20899 states and 23212 transitions. [2018-11-07 18:01:54,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:01:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 20899 states and 23212 transitions. [2018-11-07 18:01:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2018-11-07 18:01:54,071 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:54,072 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-11-07 18:01:54,072 INFO L423 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:54,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:54,073 INFO L82 PathProgramCache]: Analyzing trace with hash -393428903, now seen corresponding path program 1 times [2018-11-07 18:01:54,073 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:54,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:54,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:54,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:54,074 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 779 proven. 1771 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2018-11-07 18:01:58,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:58,063 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:58,063 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1100 with the following transitions: [2018-11-07 18:01:58,064 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [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], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [735], [738], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:58,066 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:58,067 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-11-07 18:01:58,076 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-07 18:01:58,076 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-07 18:01:58,077 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 18:01:58,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:58,077 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:58,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:58,089 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:58,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:58,390 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 18:01:58,591 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:58,592 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:01:58,597 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:01:58,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:01:58 BoogieIcfgContainer [2018-11-07 18:01:58,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:01:58,598 INFO L168 Benchmark]: Toolchain (without parser) took 211932.91 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 3.7 GB in the end (delta: -2.3 GB). Peak memory consumption was 763.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:01:58,599 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:01:58,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 804.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-07 18:01:58,601 INFO L168 Benchmark]: Boogie Procedure Inliner took 163.70 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 726.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -798.5 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2018-11-07 18:01:58,601 INFO L168 Benchmark]: Boogie Preprocessor took 121.04 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:01:58,602 INFO L168 Benchmark]: RCFGBuilder took 3487.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 119.9 MB). Peak memory consumption was 119.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:01:58,603 INFO L168 Benchmark]: TraceAbstraction took 207350.58 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.1 GB in the beginning and 3.7 GB in the end (delta: -1.7 GB). Peak memory consumption was 674.0 MB. Max. memory is 7.1 GB. [2018-11-07 18:01:58,609 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 804.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 163.70 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 726.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -798.5 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.04 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3487.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 119.9 MB). Peak memory consumption was 119.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207350.58 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.1 GB in the beginning and 3.7 GB in the end (delta: -1.7 GB). Peak memory consumption was 674.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 40]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 40). Cancelled while BasicCegarLoop was analyzing trace of length 1100 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 207.2s OverallTime, 20 OverallIterations, 9 TraceHistogramMax, 145.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2831 SDtfs, 38417 SDslu, 4670 SDs, 0 SdLazy, 49859 SolverSat, 6862 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.2s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 14142 GetRequests, 13688 SyntacticMatches, 11 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4808 ImplicationChecksByTransitivity, 22.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20899occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.5s AbstIntTime, 13 AbstIntIterations, 5 AbstIntStrong, 0.997287355066603 AbsIntWeakeningRatio, 0.08654848800834203 AbsIntAvgWeakeningVarsNumRemoved, 18.30448383733055 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 5.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 4904 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 25.1s InterpolantComputationTime, 14277 NumberOfCodeBlocks, 14056 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 20109 ConstructedInterpolants, 0 QuantifiedInterpolants, 57502295 SizeOfPredicates, 25 NumberOfNonLiveVariables, 8113 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 35 InterpolantComputations, 6 PerfectInterpolantSequences, 33260/38334 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown