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_label33_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 19:05:34,949 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 19:05:34,952 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 19:05:34,965 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 19:05:34,965 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 19:05:34,967 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 19:05:34,968 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 19:05:34,970 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 19:05:34,972 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 19:05:34,973 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 19:05:34,974 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 19:05:34,974 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 19:05:34,975 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 19:05:34,976 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 19:05:34,977 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 19:05:34,978 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 19:05:34,979 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 19:05:34,981 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 19:05:34,983 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 19:05:34,985 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 19:05:34,986 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 19:05:34,987 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 19:05:34,992 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 19:05:34,993 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 19:05:34,993 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 19:05:34,997 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 19:05:34,998 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 19:05:34,999 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 19:05:35,000 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 19:05:35,001 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 19:05:35,001 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 19:05:35,005 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-12 19:05:35,009 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 [2018-11-12 19:05:35,033 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 19:05:35,033 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 19:05:35,034 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 19:05:35,034 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 19:05:35,034 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 19:05:35,034 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 19:05:35,035 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 19:05:35,035 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 19:05:35,035 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 19:05:35,035 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 19:05:35,035 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 19:05:35,036 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 19:05:35,036 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 19:05:35,036 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 19:05:35,037 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 19:05:35,037 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 19:05:35,037 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 19:05:35,037 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 19:05:35,037 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 19:05:35,038 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 19:05:35,038 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 19:05:35,038 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 19:05:35,038 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 19:05:35,038 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 19:05:35,039 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 19:05:35,039 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:05:35,039 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 19:05:35,039 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 19:05:35,039 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 19:05:35,040 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 19:05:35,040 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 19:05:35,040 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 19:05:35,040 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 19:05:35,040 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 19:05:35,040 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 19:05:35,087 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 19:05:35,102 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 19:05:35,106 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 19:05:35,108 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 19:05:35,108 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 19:05:35,109 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label33_true-unreach-call_false-termination.c [2018-11-12 19:05:35,167 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d20d747c/aa2e969a17cc497cb104905d6aa182ac/FLAGccb6de552 [2018-11-12 19:05:35,742 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 19:05:35,745 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label33_true-unreach-call_false-termination.c [2018-11-12 19:05:35,762 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d20d747c/aa2e969a17cc497cb104905d6aa182ac/FLAGccb6de552 [2018-11-12 19:05:35,777 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d20d747c/aa2e969a17cc497cb104905d6aa182ac [2018-11-12 19:05:35,788 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 19:05:35,790 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 19:05:35,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 19:05:35,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 19:05:35,795 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 19:05:35,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:05:35" (1/1) ... [2018-11-12 19:05:35,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337cbbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:35, skipping insertion in model container [2018-11-12 19:05:35,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:05:35" (1/1) ... [2018-11-12 19:05:35,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 19:05:35,883 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 19:05:36,454 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:05:36,461 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 19:05:36,645 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:05:36,665 INFO L193 MainTranslator]: Completed translation [2018-11-12 19:05:36,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36 WrapperNode [2018-11-12 19:05:36,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 19:05:36,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 19:05:36,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 19:05:36,667 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 19:05:36,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (1/1) ... [2018-11-12 19:05:36,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (1/1) ... [2018-11-12 19:05:36,836 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 19:05:36,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 19:05:36,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 19:05:36,837 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 19:05:36,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (1/1) ... [2018-11-12 19:05:36,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (1/1) ... [2018-11-12 19:05:36,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (1/1) ... [2018-11-12 19:05:36,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (1/1) ... [2018-11-12 19:05:36,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (1/1) ... [2018-11-12 19:05:36,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (1/1) ... [2018-11-12 19:05:36,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (1/1) ... [2018-11-12 19:05:36,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 19:05:36,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 19:05:36,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 19:05:36,932 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 19:05:36,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (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 [2018-11-12 19:05:37,010 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 19:05:37,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 19:05:37,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 19:05:37,011 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 19:05:37,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 19:05:37,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 19:05:37,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 19:05:37,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 19:05:37,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 19:05:40,650 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 19:05:40,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:05:40 BoogieIcfgContainer [2018-11-12 19:05:40,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 19:05:40,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 19:05:40,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 19:05:40,656 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 19:05:40,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:05:35" (1/3) ... [2018-11-12 19:05:40,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf730a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:05:40, skipping insertion in model container [2018-11-12 19:05:40,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:05:36" (2/3) ... [2018-11-12 19:05:40,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf730a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:05:40, skipping insertion in model container [2018-11-12 19:05:40,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:05:40" (3/3) ... [2018-11-12 19:05:40,662 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label33_true-unreach-call_false-termination.c [2018-11-12 19:05:40,671 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 19:05:40,680 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 19:05:40,697 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 19:05:40,744 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 19:05:40,744 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 19:05:40,744 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 19:05:40,744 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 19:05:40,745 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 19:05:40,745 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 19:05:40,745 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 19:05:40,745 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 19:05:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 19:05:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-12 19:05:40,790 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:05:40,792 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:05:40,794 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:05:40,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1913036537, now seen corresponding path program 1 times [2018-11-12 19:05:40,802 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:05:40,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:40,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:05:40,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:40,850 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:05:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:05:41,276 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 19:05:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:05:41,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:05:41,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 19:05:41,315 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:05:41,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 19:05:41,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 19:05:41,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:05:41,341 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-12 19:05:43,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:05:43,002 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-12 19:05:43,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 19:05:43,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2018-11-12 19:05:43,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:05:43,026 INFO L225 Difference]: With dead ends: 691 [2018-11-12 19:05:43,026 INFO L226 Difference]: Without dead ends: 434 [2018-11-12 19:05:43,035 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:05:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-12 19:05:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-12 19:05:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-12 19:05:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-12 19:05:43,123 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 65 [2018-11-12 19:05:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:05:43,124 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-12 19:05:43,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 19:05:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-12 19:05:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-11-12 19:05:43,133 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:05:43,134 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 19:05:43,134 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:05:43,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:43,135 INFO L82 PathProgramCache]: Analyzing trace with hash 920993175, now seen corresponding path program 1 times [2018-11-12 19:05:43,135 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:05:43,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:43,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:05:43,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:43,137 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:05:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:05:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:05:43,441 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:05:43,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 19:05:43,442 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:05:43,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 19:05:43,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 19:05:43,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 19:05:43,446 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-12 19:05:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:05:45,645 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-12 19:05:45,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:05:45,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2018-11-12 19:05:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:05:45,651 INFO L225 Difference]: With dead ends: 1062 [2018-11-12 19:05:45,651 INFO L226 Difference]: Without dead ends: 634 [2018-11-12 19:05:45,654 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 19:05:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-12 19:05:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-12 19:05:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-12 19:05:45,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-12 19:05:45,695 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 140 [2018-11-12 19:05:45,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:05:45,696 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-12 19:05:45,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 19:05:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-12 19:05:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-12 19:05:45,701 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:05:45,701 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 19:05:45,701 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:05:45,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash 409670480, now seen corresponding path program 1 times [2018-11-12 19:05:45,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:05:45,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:45,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:05:45,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:45,704 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:05:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:05:46,095 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-11-12 19:05:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:05:46,294 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:05:46,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 19:05:46,294 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:05:46,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 19:05:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 19:05:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-12 19:05:46,296 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 6 states. [2018-11-12 19:05:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:05:50,812 INFO L93 Difference]: Finished difference Result 1812 states and 2965 transitions. [2018-11-12 19:05:50,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 19:05:50,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2018-11-12 19:05:50,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:05:50,828 INFO L225 Difference]: With dead ends: 1812 [2018-11-12 19:05:50,828 INFO L226 Difference]: Without dead ends: 1193 [2018-11-12 19:05:50,832 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 19:05:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2018-11-12 19:05:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1138. [2018-11-12 19:05:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2018-11-12 19:05:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1729 transitions. [2018-11-12 19:05:50,889 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1729 transitions. Word has length 149 [2018-11-12 19:05:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:05:50,889 INFO L480 AbstractCegarLoop]: Abstraction has 1138 states and 1729 transitions. [2018-11-12 19:05:50,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 19:05:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1729 transitions. [2018-11-12 19:05:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-11-12 19:05:50,899 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:05:50,899 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:05:50,899 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:05:50,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:50,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1226965922, now seen corresponding path program 1 times [2018-11-12 19:05:50,900 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:05:50,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:50,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:05:50,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:50,901 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:05:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:05:51,386 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:05:51,571 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:05:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:05:52,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:05:52,349 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:05:52,350 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 235 with the following transitions: [2018-11-12 19:05:52,352 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:05:52,398 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:05:52,399 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:05:53,170 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:05:53,172 INFO L272 AbstractInterpreter]: Visited 93 different actions 179 times. Merged at 4 different actions 4 times. Never widened. Performed 1691 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1691 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:05:53,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:53,214 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:05:54,075 INFO L227 lantSequenceWeakener]: Weakened 77 states. On average, predicates are now at 78.87% of their original sizes. [2018-11-12 19:05:54,075 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:05:55,577 INFO L415 sIntCurrentIteration]: We unified 233 AI predicates to 233 [2018-11-12 19:05:55,577 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:05:55,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:05:55,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [12] total 34 [2018-11-12 19:05:55,579 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:05:55,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-12 19:05:55,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-12 19:05:55,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2018-11-12 19:05:55,581 INFO L87 Difference]: Start difference. First operand 1138 states and 1729 transitions. Second operand 24 states. [2018-11-12 19:06:10,123 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:06:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:29,387 INFO L93 Difference]: Finished difference Result 4136 states and 6184 transitions. [2018-11-12 19:06:29,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-12 19:06:29,388 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 234 [2018-11-12 19:06:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:29,404 INFO L225 Difference]: With dead ends: 4136 [2018-11-12 19:06:29,405 INFO L226 Difference]: Without dead ends: 3004 [2018-11-12 19:06:29,412 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 244 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2018-11-12 19:06:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3004 states. [2018-11-12 19:06:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3004 to 2990. [2018-11-12 19:06:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2990 states. [2018-11-12 19:06:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 3647 transitions. [2018-11-12 19:06:29,509 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 3647 transitions. Word has length 234 [2018-11-12 19:06:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:29,510 INFO L480 AbstractCegarLoop]: Abstraction has 2990 states and 3647 transitions. [2018-11-12 19:06:29,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-12 19:06:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 3647 transitions. [2018-11-12 19:06:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-11-12 19:06:29,520 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:29,520 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:06:29,521 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:29,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash 656086570, now seen corresponding path program 1 times [2018-11-12 19:06:29,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:29,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:29,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:29,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:29,525 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:30,483 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:06:30,683 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:06:30,905 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:06:31,364 WARN L179 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-12 19:06:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 124 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:06:31,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:06:31,696 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:06:31,696 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 271 with the following transitions: [2018-11-12 19:06:31,697 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [667], [671], [675], [679], [683], [687], [691], [695], [698], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:06:31,703 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:06:31,703 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:06:31,929 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:06:31,929 INFO L272 AbstractInterpreter]: Visited 129 different actions 251 times. Merged at 4 different actions 4 times. Never widened. Performed 3273 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3273 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:06:31,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:31,942 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:06:32,523 INFO L227 lantSequenceWeakener]: Weakened 46 states. On average, predicates are now at 79.94% of their original sizes. [2018-11-12 19:06:32,524 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:06:33,753 INFO L415 sIntCurrentIteration]: We unified 269 AI predicates to 269 [2018-11-12 19:06:33,753 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:06:33,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:06:33,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [12] total 29 [2018-11-12 19:06:33,754 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:33,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-12 19:06:33,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-12 19:06:33,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2018-11-12 19:06:33,756 INFO L87 Difference]: Start difference. First operand 2990 states and 3647 transitions. Second operand 19 states. [2018-11-12 19:06:42,171 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:06:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:54,600 INFO L93 Difference]: Finished difference Result 5439 states and 7481 transitions. [2018-11-12 19:06:54,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-12 19:06:54,601 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 270 [2018-11-12 19:06:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:54,623 INFO L225 Difference]: With dead ends: 5439 [2018-11-12 19:06:54,623 INFO L226 Difference]: Without dead ends: 4498 [2018-11-12 19:06:54,630 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 279 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2018-11-12 19:06:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2018-11-12 19:06:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 3783. [2018-11-12 19:06:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3783 states. [2018-11-12 19:06:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 4458 transitions. [2018-11-12 19:06:54,729 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 4458 transitions. Word has length 270 [2018-11-12 19:06:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:54,730 INFO L480 AbstractCegarLoop]: Abstraction has 3783 states and 4458 transitions. [2018-11-12 19:06:54,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-12 19:06:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 4458 transitions. [2018-11-12 19:06:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-11-12 19:06:54,740 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:54,740 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:06:54,741 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:54,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1600074685, now seen corresponding path program 1 times [2018-11-12 19:06:54,741 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:54,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:54,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:54,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:54,742 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:55,186 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:06:55,377 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:06:55,591 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:06:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 124 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:06:56,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:06:56,115 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:06:56,116 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 296 with the following transitions: [2018-11-12 19:06:56,116 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [798], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:06:56,122 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:06:56,122 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:06:56,434 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:06:56,434 INFO L272 AbstractInterpreter]: Visited 154 different actions 304 times. Merged at 5 different actions 7 times. Never widened. Performed 5459 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5459 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:06:56,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:56,438 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:06:56,938 INFO L227 lantSequenceWeakener]: Weakened 48 states. On average, predicates are now at 79.83% of their original sizes. [2018-11-12 19:06:56,938 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:06:57,416 INFO L415 sIntCurrentIteration]: We unified 294 AI predicates to 294 [2018-11-12 19:06:57,416 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:06:57,417 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:06:57,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [12] total 30 [2018-11-12 19:06:57,417 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:57,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:06:57,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:06:57,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:06:57,418 INFO L87 Difference]: Start difference. First operand 3783 states and 4458 transitions. Second operand 20 states. [2018-11-12 19:07:06,195 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:07:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:07:18,840 INFO L93 Difference]: Finished difference Result 6229 states and 8291 transitions. [2018-11-12 19:07:18,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 19:07:18,840 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 295 [2018-11-12 19:07:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:07:18,863 INFO L225 Difference]: With dead ends: 6229 [2018-11-12 19:07:18,864 INFO L226 Difference]: Without dead ends: 5288 [2018-11-12 19:07:18,871 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 303 GetRequests, 274 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2018-11-12 19:07:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2018-11-12 19:07:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 4574. [2018-11-12 19:07:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4574 states. [2018-11-12 19:07:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 5269 transitions. [2018-11-12 19:07:18,982 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 5269 transitions. Word has length 295 [2018-11-12 19:07:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:07:18,983 INFO L480 AbstractCegarLoop]: Abstraction has 4574 states and 5269 transitions. [2018-11-12 19:07:18,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:07:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 5269 transitions. [2018-11-12 19:07:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-11-12 19:07:18,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:07:18,996 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:07:18,996 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:07:18,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:18,997 INFO L82 PathProgramCache]: Analyzing trace with hash -27734826, now seen corresponding path program 1 times [2018-11-12 19:07:18,997 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:07:18,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:18,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:07:18,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:18,998 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:07:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:07:19,455 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:07:19,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:07:19,874 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:07:19,874 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 309 with the following transitions: [2018-11-12 19:07:19,874 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [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], [850], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:07:19,880 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:07:19,880 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:07:20,543 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:07:20,543 INFO L272 AbstractInterpreter]: Visited 167 different actions 327 times. Merged at 4 different actions 4 times. Never widened. Performed 4462 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4462 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:07:20,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:20,547 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:07:20,945 INFO L227 lantSequenceWeakener]: Weakened 46 states. On average, predicates are now at 79.94% of their original sizes. [2018-11-12 19:07:20,946 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:07:21,499 INFO L415 sIntCurrentIteration]: We unified 307 AI predicates to 307 [2018-11-12 19:07:21,500 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:07:21,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:07:21,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [12] total 30 [2018-11-12 19:07:21,500 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:07:21,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:07:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:07:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:07:21,502 INFO L87 Difference]: Start difference. First operand 4574 states and 5269 transitions. Second operand 20 states. [2018-11-12 19:07:29,301 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:07:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:07:43,528 INFO L93 Difference]: Finished difference Result 7021 states and 9103 transitions. [2018-11-12 19:07:43,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-12 19:07:43,529 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 308 [2018-11-12 19:07:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:07:43,551 INFO L225 Difference]: With dead ends: 7021 [2018-11-12 19:07:43,551 INFO L226 Difference]: Without dead ends: 6080 [2018-11-12 19:07:43,559 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 317 GetRequests, 285 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2018-11-12 19:07:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6080 states. [2018-11-12 19:07:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6080 to 5365. [2018-11-12 19:07:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5365 states. [2018-11-12 19:07:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5365 states to 5365 states and 6080 transitions. [2018-11-12 19:07:43,673 INFO L78 Accepts]: Start accepts. Automaton has 5365 states and 6080 transitions. Word has length 308 [2018-11-12 19:07:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:07:43,674 INFO L480 AbstractCegarLoop]: Abstraction has 5365 states and 6080 transitions. [2018-11-12 19:07:43,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:07:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 5365 states and 6080 transitions. [2018-11-12 19:07:43,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-11-12 19:07:43,689 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:07:43,690 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:07:43,690 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:07:43,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:43,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1997615698, now seen corresponding path program 1 times [2018-11-12 19:07:43,690 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:07:43,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:43,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:07:43,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:43,692 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:07:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:07:44,202 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 186 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:07:45,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:07:45,057 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:07:45,057 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 321 with the following transitions: [2018-11-12 19:07:45,058 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [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], [898], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:07:45,061 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:07:45,061 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:07:45,522 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:07:45,523 INFO L272 AbstractInterpreter]: Visited 179 different actions 351 times. Merged at 4 different actions 4 times. Never widened. Performed 5016 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5016 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:07:45,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:45,560 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:07:46,089 INFO L227 lantSequenceWeakener]: Weakened 46 states. On average, predicates are now at 79.94% of their original sizes. [2018-11-12 19:07:46,089 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:07:46,700 INFO L415 sIntCurrentIteration]: We unified 319 AI predicates to 319 [2018-11-12 19:07:46,700 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:07:46,700 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:07:46,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [14] total 32 [2018-11-12 19:07:46,701 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:07:46,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:07:46,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:07:46,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:07:46,703 INFO L87 Difference]: Start difference. First operand 5365 states and 6080 transitions. Second operand 20 states. [2018-11-12 19:07:56,569 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:18,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:18,437 INFO L93 Difference]: Finished difference Result 7892 states and 10035 transitions. [2018-11-12 19:08:18,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-12 19:08:18,437 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 320 [2018-11-12 19:08:18,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:18,461 INFO L225 Difference]: With dead ends: 7892 [2018-11-12 19:08:18,461 INFO L226 Difference]: Without dead ends: 6951 [2018-11-12 19:08:18,469 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 330 GetRequests, 297 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2018-11-12 19:08:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2018-11-12 19:08:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 6244. [2018-11-12 19:08:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6244 states. [2018-11-12 19:08:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6244 states to 6244 states and 6982 transitions. [2018-11-12 19:08:18,596 INFO L78 Accepts]: Start accepts. Automaton has 6244 states and 6982 transitions. Word has length 320 [2018-11-12 19:08:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:18,597 INFO L480 AbstractCegarLoop]: Abstraction has 6244 states and 6982 transitions. [2018-11-12 19:08:18,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:08:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 6244 states and 6982 transitions. [2018-11-12 19:08:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-11-12 19:08:18,614 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:18,615 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:08:18,615 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:18,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:18,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1214153444, now seen corresponding path program 1 times [2018-11-12 19:08:18,615 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:18,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:18,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:18,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:18,617 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 262 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 19:08:19,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:19,077 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:19,077 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 346 with the following transitions: [2018-11-12 19:08:19,077 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:08:19,079 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:19,079 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:19,346 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:19,346 INFO L272 AbstractInterpreter]: Visited 120 different actions 357 times. Merged at 7 different actions 19 times. Never widened. Performed 4332 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4332 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:08:19,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:19,355 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:08:20,480 INFO L227 lantSequenceWeakener]: Weakened 46 states. On average, predicates are now at 77.77% of their original sizes. [2018-11-12 19:08:20,480 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:08:20,870 INFO L415 sIntCurrentIteration]: We unified 344 AI predicates to 344 [2018-11-12 19:08:20,870 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:08:20,870 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:08:20,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-11-12 19:08:20,870 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:20,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 19:08:20,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 19:08:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-11-12 19:08:20,872 INFO L87 Difference]: Start difference. First operand 6244 states and 6982 transitions. Second operand 17 states. [2018-11-12 19:08:31,105 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:46,560 INFO L93 Difference]: Finished difference Result 8790 states and 10598 transitions. [2018-11-12 19:08:46,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-12 19:08:46,560 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 345 [2018-11-12 19:08:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:46,575 INFO L225 Difference]: With dead ends: 8790 [2018-11-12 19:08:46,575 INFO L226 Difference]: Without dead ends: 6438 [2018-11-12 19:08:46,583 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 356 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2018-11-12 19:08:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2018-11-12 19:08:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 6246. [2018-11-12 19:08:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6246 states. [2018-11-12 19:08:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6246 states to 6246 states and 7042 transitions. [2018-11-12 19:08:46,691 INFO L78 Accepts]: Start accepts. Automaton has 6246 states and 7042 transitions. Word has length 345 [2018-11-12 19:08:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:46,691 INFO L480 AbstractCegarLoop]: Abstraction has 6246 states and 7042 transitions. [2018-11-12 19:08:46,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 19:08:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 6246 states and 7042 transitions. [2018-11-12 19:08:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-11-12 19:08:46,710 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:46,711 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-12 19:08:46,711 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:46,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:46,711 INFO L82 PathProgramCache]: Analyzing trace with hash -926137119, now seen corresponding path program 1 times [2018-11-12 19:08:46,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:46,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:46,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:46,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:46,713 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-12 19:08:47,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:47,553 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:47,553 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 371 with the following transitions: [2018-11-12 19:08:47,553 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:08:47,555 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:47,555 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:47,739 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:47,851 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:47,851 INFO L272 AbstractInterpreter]: Visited 120 different actions 359 times. Merged at 7 different actions 21 times. Never widened. Performed 4380 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4380 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:08:47,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:47,860 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:08:48,175 INFO L227 lantSequenceWeakener]: Weakened 367 states. On average, predicates are now at 80.66% of their original sizes. [2018-11-12 19:08:48,175 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:08:48,298 INFO L415 sIntCurrentIteration]: We unified 369 AI predicates to 369 [2018-11-12 19:08:48,299 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:08:48,299 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:08:48,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 19:08:48,299 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:48,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 19:08:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 19:08:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 19:08:48,300 INFO L87 Difference]: Start difference. First operand 6246 states and 7042 transitions. Second operand 10 states. [2018-11-12 19:08:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:57,327 INFO L93 Difference]: Finished difference Result 8839 states and 10488 transitions. [2018-11-12 19:08:57,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 19:08:57,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 370 [2018-11-12 19:08:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:57,341 INFO L225 Difference]: With dead ends: 8839 [2018-11-12 19:08:57,341 INFO L226 Difference]: Without dead ends: 6806 [2018-11-12 19:08:57,348 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 377 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 19:08:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6806 states. [2018-11-12 19:08:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6806 to 6785. [2018-11-12 19:08:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6785 states. [2018-11-12 19:08:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6785 states to 6785 states and 7658 transitions. [2018-11-12 19:08:57,467 INFO L78 Accepts]: Start accepts. Automaton has 6785 states and 7658 transitions. Word has length 370 [2018-11-12 19:08:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:57,468 INFO L480 AbstractCegarLoop]: Abstraction has 6785 states and 7658 transitions. [2018-11-12 19:08:57,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 19:08:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6785 states and 7658 transitions. [2018-11-12 19:08:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-11-12 19:08:57,494 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:57,494 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:08:57,495 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:57,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:57,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1035868732, now seen corresponding path program 1 times [2018-11-12 19:08:57,495 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:57,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:57,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:57,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:57,497 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 383 proven. 69 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-11-12 19:08:58,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:58,088 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:58,089 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 441 with the following transitions: [2018-11-12 19:08:58,089 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [494], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:08:58,091 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:58,091 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:58,231 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:58,445 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:08:58,446 INFO L272 AbstractInterpreter]: Visited 122 different actions 482 times. Merged at 8 different actions 30 times. Never widened. Performed 4877 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4877 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 19:08:58,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:58,457 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:08:58,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:58,457 INFO L192 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 [2018-11-12 19:08:58,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:58,468 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:08:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:58,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:08:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 552 proven. 2 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2018-11-12 19:08:59,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:08:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 383 proven. 69 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-11-12 19:08:59,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:08:59,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-12 19:08:59,470 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:08:59,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 19:08:59,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 19:08:59,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-11-12 19:08:59,472 INFO L87 Difference]: Start difference. First operand 6785 states and 7658 transitions. Second operand 10 states. [2018-11-12 19:09:04,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:04,694 INFO L93 Difference]: Finished difference Result 15114 states and 19428 transitions. [2018-11-12 19:09:04,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-12 19:09:04,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 440 [2018-11-12 19:09:04,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:04,729 INFO L225 Difference]: With dead ends: 15114 [2018-11-12 19:09:04,729 INFO L226 Difference]: Without dead ends: 11794 [2018-11-12 19:09:04,748 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 892 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2018-11-12 19:09:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11794 states. [2018-11-12 19:09:04,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11794 to 11711. [2018-11-12 19:09:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11711 states. [2018-11-12 19:09:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11711 states to 11711 states and 13824 transitions. [2018-11-12 19:09:04,957 INFO L78 Accepts]: Start accepts. Automaton has 11711 states and 13824 transitions. Word has length 440 [2018-11-12 19:09:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:04,958 INFO L480 AbstractCegarLoop]: Abstraction has 11711 states and 13824 transitions. [2018-11-12 19:09:04,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 19:09:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 11711 states and 13824 transitions. [2018-11-12 19:09:04,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-11-12 19:09:04,980 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:04,981 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:09:04,981 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:04,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:04,982 INFO L82 PathProgramCache]: Analyzing trace with hash 318479449, now seen corresponding path program 1 times [2018-11-12 19:09:04,982 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:04,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:04,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:04,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:04,983 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 509 proven. 149 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-12 19:09:06,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:06,721 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:06,721 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 444 with the following transitions: [2018-11-12 19:09:06,722 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:06,724 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:06,724 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:06,835 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:07,034 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:09:07,034 INFO L272 AbstractInterpreter]: Visited 122 different actions 481 times. Merged at 8 different actions 29 times. Never widened. Performed 4889 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4889 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 19:09:07,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:07,041 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:09:07,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:07,041 INFO L192 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 [2018-11-12 19:09:07,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:07,053 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:09:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:07,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:09:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 477 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-12 19:09:07,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:09:07,858 WARN L179 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-11-12 19:09:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 477 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-12 19:09:08,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:09:08,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 19:09:08,291 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:09:08,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 19:09:08,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 19:09:08,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-12 19:09:08,293 INFO L87 Difference]: Start difference. First operand 11711 states and 13824 transitions. Second operand 17 states. [2018-11-12 19:09:16,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:16,309 INFO L93 Difference]: Finished difference Result 19643 states and 24932 transitions. [2018-11-12 19:09:16,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-12 19:09:16,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 443 [2018-11-12 19:09:16,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:16,341 INFO L225 Difference]: With dead ends: 19643 [2018-11-12 19:09:16,341 INFO L226 Difference]: Without dead ends: 6113 [2018-11-12 19:09:16,391 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 897 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=521, Invalid=1735, Unknown=0, NotChecked=0, Total=2256 [2018-11-12 19:09:16,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6113 states. [2018-11-12 19:09:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6113 to 5001. [2018-11-12 19:09:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5001 states. [2018-11-12 19:09:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 5986 transitions. [2018-11-12 19:09:16,496 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 5986 transitions. Word has length 443 [2018-11-12 19:09:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:16,496 INFO L480 AbstractCegarLoop]: Abstraction has 5001 states and 5986 transitions. [2018-11-12 19:09:16,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 19:09:16,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 5986 transitions. [2018-11-12 19:09:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2018-11-12 19:09:16,505 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:16,505 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:09:16,506 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:16,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1909872244, now seen corresponding path program 1 times [2018-11-12 19:09:16,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:16,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:16,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:16,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:16,507 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:16,904 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-12 19:09:17,086 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-11-12 19:09:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 403 proven. 412 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:09:18,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:18,000 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:18,000 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 545 with the following transitions: [2018-11-12 19:09:18,001 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [421], [423], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [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], [910], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:18,003 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:18,004 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:18,245 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:18,988 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:09:18,988 INFO L272 AbstractInterpreter]: Visited 184 different actions 731 times. Merged at 8 different actions 28 times. Never widened. Performed 8669 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8669 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:09:18,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:18,993 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates Received shutdown request... [2018-11-12 19:09:19,846 INFO L227 lantSequenceWeakener]: Weakened 59 states. On average, predicates are now at 78.35% of their original sizes. [2018-11-12 19:09:19,847 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:09:19,858 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 19:09:19,862 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 19:09:19,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 07:09:19 BoogieIcfgContainer [2018-11-12 19:09:19,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 19:09:19,863 INFO L168 Benchmark]: Toolchain (without parser) took 224074.03 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 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-11-12 19:09:19,864 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 19:09:19,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 875.69 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: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2018-11-12 19:09:19,865 INFO L168 Benchmark]: Boogie Procedure Inliner took 169.22 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -791.1 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2018-11-12 19:09:19,866 INFO L168 Benchmark]: Boogie Preprocessor took 94.36 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 19:09:19,867 INFO L168 Benchmark]: RCFGBuilder took 3720.12 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 122.2 MB). Peak memory consumption was 122.2 MB. Max. memory is 7.1 GB. [2018-11-12 19:09:19,867 INFO L168 Benchmark]: TraceAbstraction took 219209.92 ms. Allocated memory was 2.2 GB in the beginning and 4.6 GB in the end (delta: 2.4 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-12 19:09:19,872 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 875.69 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: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 169.22 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -791.1 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 94.36 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3720.12 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 122.2 MB). Peak memory consumption was 122.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219209.92 ms. Allocated memory was 2.2 GB in the beginning and 4.6 GB in the end (delta: 2.4 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 178]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 178). Cancelled while BasicCegarLoop was analyzing trace of length 545 with TraceHistMax 5,while AbsIntCurrentIteration was generating AI predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 3 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 219.1s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 186.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2162 SDtfs, 35038 SDslu, 2338 SDs, 0 SdLazy, 36152 SolverSat, 6721 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.5s Time, PredicateUnifierStatistics: 14 DeclaredPredicates, 4096 GetRequests, 3800 SyntacticMatches, 22 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 10.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11711occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 4.8s AbstIntTime, 10 AbstIntIterations, 8 AbstIntStrong, 0.9973637988428815 AbsIntWeakeningRatio, 0.08663181478715459 AbsIntAvgWeakeningVarsNumRemoved, 11.277072442120986 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 4337 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 4262 NumberOfCodeBlocks, 4262 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 5129 ConstructedInterpolants, 0 QuantifiedInterpolants, 11281852 SizeOfPredicates, 6 NumberOfNonLiveVariables, 1402 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 5794/6342 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown