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_label57_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:04:45,885 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:04:45,887 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:04:45,899 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:04:45,900 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:04:45,906 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:04:45,907 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:04:45,911 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:04:45,914 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:04:45,915 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:04:45,916 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:04:45,916 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:04:45,917 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:04:45,918 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:04:45,919 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:04:45,920 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:04:45,921 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:04:45,923 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:04:45,925 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:04:45,927 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:04:45,928 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:04:45,929 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:04:45,932 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:04:45,932 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:04:45,932 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:04:45,933 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:04:45,934 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:04:45,935 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:04:45,936 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:04:45,937 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:04:45,937 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:04:45,938 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:04:45,938 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:04:45,939 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:04:45,940 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:04:45,940 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:04:45,941 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:04:45,956 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:04:45,957 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:04:45,958 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:04:45,958 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:04:45,958 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:04:45,958 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:04:45,958 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:04:45,959 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:04:45,959 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:04:45,959 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:04:45,959 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:04:45,959 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:04:45,959 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:04:45,960 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:04:45,960 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:04:45,961 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:04:45,961 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:04:45,961 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:04:45,961 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:04:45,961 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:04:45,962 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:04:45,962 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:04:45,962 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:04:45,962 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:04:45,962 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:04:45,962 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:04:45,963 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:04:45,963 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:04:45,963 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:04:45,963 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:04:45,963 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:04:45,964 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:04:45,964 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:04:45,964 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:04:45,964 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:04:46,007 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:04:46,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:04:46,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:04:46,025 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:04:46,025 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:04:46,026 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label57_false-unreach-call_false-termination.c [2018-11-07 18:04:46,089 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3f4d216b/afe83f7c2dfb4d379348ce9430bde919/FLAGa13522a98 [2018-11-07 18:04:46,705 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:04:46,706 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label57_false-unreach-call_false-termination.c [2018-11-07 18:04:46,721 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3f4d216b/afe83f7c2dfb4d379348ce9430bde919/FLAGa13522a98 [2018-11-07 18:04:46,739 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3f4d216b/afe83f7c2dfb4d379348ce9430bde919 [2018-11-07 18:04:46,756 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:04:46,759 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:04:46,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:04:46,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:04:46,767 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:04:46,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:04:46" (1/1) ... [2018-11-07 18:04:46,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121926f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:46, skipping insertion in model container [2018-11-07 18:04:46,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:04:46" (1/1) ... [2018-11-07 18:04:46,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:04:46,867 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:04:47,321 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:04:47,326 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:04:47,494 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:04:47,517 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:04:47,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47 WrapperNode [2018-11-07 18:04:47,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:04:47,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:04:47,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:04:47,520 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:04:47,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (1/1) ... [2018-11-07 18:04:47,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (1/1) ... [2018-11-07 18:04:47,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:04:47,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:04:47,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:04:47,682 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:04:47,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (1/1) ... [2018-11-07 18:04:47,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (1/1) ... [2018-11-07 18:04:47,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (1/1) ... [2018-11-07 18:04:47,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (1/1) ... [2018-11-07 18:04:47,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (1/1) ... [2018-11-07 18:04:47,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (1/1) ... [2018-11-07 18:04:47,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (1/1) ... [2018-11-07 18:04:47,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:04:47,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:04:47,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:04:47,813 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:04:47,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:04:47,883 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:04:47,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:04:47,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:04:47,884 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:04:47,884 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:04:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:04:47,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:04:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:04:47,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:04:51,447 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:04:51,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:04:51 BoogieIcfgContainer [2018-11-07 18:04:51,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:04:51,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:04:51,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:04:51,452 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:04:51,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:04:46" (1/3) ... [2018-11-07 18:04:51,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf57a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:04:51, skipping insertion in model container [2018-11-07 18:04:51,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:47" (2/3) ... [2018-11-07 18:04:51,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf57a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:04:51, skipping insertion in model container [2018-11-07 18:04:51,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:04:51" (3/3) ... [2018-11-07 18:04:51,456 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label57_false-unreach-call_false-termination.c [2018-11-07 18:04:51,466 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:04:51,474 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:04:51,490 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:04:51,530 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:04:51,530 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:04:51,530 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:04:51,531 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:04:51,531 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:04:51,534 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:04:51,534 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:04:51,534 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:04:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 18:04:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-07 18:04:51,572 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:51,574 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] [2018-11-07 18:04:51,576 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:51,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:51,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1786255177, now seen corresponding path program 1 times [2018-11-07 18:04:51,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:51,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:51,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:51,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:51,629 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:52,028 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:04:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:04:52,053 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:04:52,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:04:52,056 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:52,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:04:52,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:04:52,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:04:52,083 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 18:04:53,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:53,952 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 18:04:53,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:04:53,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2018-11-07 18:04:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:53,977 INFO L225 Difference]: With dead ends: 691 [2018-11-07 18:04:53,978 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 18:04:53,986 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:04:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 18:04:54,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 18:04:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 18:04:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 18:04:54,078 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 37 [2018-11-07 18:04:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:54,079 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 18:04:54,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:04:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 18:04:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-11-07 18:04:54,087 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:54,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:54,087 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:54,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:54,088 INFO L82 PathProgramCache]: Analyzing trace with hash -778187265, now seen corresponding path program 1 times [2018-11-07 18:04:54,088 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:54,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:54,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:54,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:54,090 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:04:54,390 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:04:54,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:04:54,390 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:54,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:04:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:04:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:04:54,393 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 18:04:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:56,369 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 18:04:56,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:04:56,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2018-11-07 18:04:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:56,378 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 18:04:56,379 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 18:04:56,384 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 [2018-11-07 18:04:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 18:04:56,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 18:04:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 18:04:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 18:04:56,437 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 124 [2018-11-07 18:04:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:56,438 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 18:04:56,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:04:56,439 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 18:04:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-07 18:04:56,442 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:56,443 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:56,443 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:56,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:56,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1753523144, now seen corresponding path program 1 times [2018-11-07 18:04:56,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:56,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:56,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:56,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:56,445 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:04:56,701 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:04:56,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:04:56,702 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:56,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:04:56,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:04:56,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:04:56,703 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-07 18:05:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:02,008 INFO L93 Difference]: Finished difference Result 2352 states and 4016 transitions. [2018-11-07 18:05:02,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:05:02,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2018-11-07 18:05:02,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:02,025 INFO L225 Difference]: With dead ends: 2352 [2018-11-07 18:05:02,025 INFO L226 Difference]: Without dead ends: 1733 [2018-11-07 18:05:02,032 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:05:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2018-11-07 18:05:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1733. [2018-11-07 18:05:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-11-07 18:05:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2647 transitions. [2018-11-07 18:05:02,110 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2647 transitions. Word has length 133 [2018-11-07 18:05:02,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:02,111 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 2647 transitions. [2018-11-07 18:05:02,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:05:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2647 transitions. [2018-11-07 18:05:02,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-11-07 18:05:02,126 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:02,127 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:05:02,127 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:02,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:02,128 INFO L82 PathProgramCache]: Analyzing trace with hash 853397474, now seen corresponding path program 1 times [2018-11-07 18:05:02,128 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:02,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:02,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:02,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:02,130 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:02,801 WARN L179 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-11-07 18:05:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 60 proven. 107 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:05:03,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:03,187 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:03,188 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 263 with the following transitions: [2018-11-07 18:05:03,190 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:03,237 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:03,237 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:03,877 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:03,881 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:05:03,884 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 18:05:03,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:03,932 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:05:04,662 INFO L227 lantSequenceWeakener]: Weakened 253 states. On average, predicates are now at 77.6% of their original sizes. [2018-11-07 18:05:04,662 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:05:05,024 INFO L415 sIntCurrentIteration]: We unified 261 AI predicates to 261 [2018-11-07 18:05:05,025 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:05:05,025 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:05:05,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-07 18:05:05,029 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:05:05,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:05:05,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:05:05,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:05:05,030 INFO L87 Difference]: Start difference. First operand 1733 states and 2647 transitions. Second operand 7 states. [2018-11-07 18:05:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:14,214 INFO L93 Difference]: Finished difference Result 3645 states and 5568 transitions. [2018-11-07 18:05:14,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:05:14,215 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 262 [2018-11-07 18:05:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:14,227 INFO L225 Difference]: With dead ends: 3645 [2018-11-07 18:05:14,227 INFO L226 Difference]: Without dead ends: 1918 [2018-11-07 18:05:14,236 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 262 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:05:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2018-11-07 18:05:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2018-11-07 18:05:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-11-07 18:05:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2838 transitions. [2018-11-07 18:05:14,291 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2838 transitions. Word has length 262 [2018-11-07 18:05:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:14,292 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2838 transitions. [2018-11-07 18:05:14,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:05:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2838 transitions. [2018-11-07 18:05:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-11-07 18:05:14,303 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:14,304 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:14,304 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:14,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:14,305 INFO L82 PathProgramCache]: Analyzing trace with hash -438030448, now seen corresponding path program 1 times [2018-11-07 18:05:14,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:14,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:14,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:14,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:14,306 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:14,805 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:05:15,000 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 18:05:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 178 proven. 189 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:05:15,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:15,531 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:15,532 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 348 with the following transitions: [2018-11-07 18:05:15,532 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:15,537 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:15,537 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:15,659 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:15,774 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:05:15,775 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:05:15,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:15,818 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:05:16,616 INFO L227 lantSequenceWeakener]: Weakened 132 states. On average, predicates are now at 78.22% of their original sizes. [2018-11-07 18:05:16,617 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:05:18,025 INFO L415 sIntCurrentIteration]: We unified 346 AI predicates to 346 [2018-11-07 18:05:18,025 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:05:18,025 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:05:18,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [12] total 35 [2018-11-07 18:05:18,026 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:05:18,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-07 18:05:18,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-07 18:05:18,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-11-07 18:05:18,027 INFO L87 Difference]: Start difference. First operand 1916 states and 2838 transitions. Second operand 25 states. [2018-11-07 18:05:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:41,549 INFO L93 Difference]: Finished difference Result 4357 states and 6366 transitions. [2018-11-07 18:05:41,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-07 18:05:41,549 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 347 [2018-11-07 18:05:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:41,561 INFO L225 Difference]: With dead ends: 4357 [2018-11-07 18:05:41,561 INFO L226 Difference]: Without dead ends: 1921 [2018-11-07 18:05:41,572 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 361 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2018-11-07 18:05:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2018-11-07 18:05:41,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1916. [2018-11-07 18:05:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-11-07 18:05:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2832 transitions. [2018-11-07 18:05:41,626 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2832 transitions. Word has length 347 [2018-11-07 18:05:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:41,626 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2832 transitions. [2018-11-07 18:05:41,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-07 18:05:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2832 transitions. [2018-11-07 18:05:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-11-07 18:05:41,638 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:41,638 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 18:05:41,638 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:41,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:41,639 INFO L82 PathProgramCache]: Analyzing trace with hash 454839356, now seen corresponding path program 1 times [2018-11-07 18:05:41,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:41,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:41,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:41,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:41,640 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 103 proven. 316 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:05:42,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:42,726 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:42,726 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 374 with the following transitions: [2018-11-07 18:05:42,726 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:42,730 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:42,730 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:42,858 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:42,970 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:05:42,970 INFO L272 AbstractInterpreter]: Visited 122 different actions 240 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:05:42,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:42,998 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:05:43,446 INFO L227 lantSequenceWeakener]: Weakened 38 states. On average, predicates are now at 80.55% of their original sizes. [2018-11-07 18:05:43,447 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:05:43,907 INFO L415 sIntCurrentIteration]: We unified 372 AI predicates to 372 [2018-11-07 18:05:43,907 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:05:43,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:05:43,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-07 18:05:43,908 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:05:43,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 18:05:43,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 18:05:43,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:05:43,909 INFO L87 Difference]: Start difference. First operand 1916 states and 2832 transitions. Second operand 21 states. [2018-11-07 18:06:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:00,467 INFO L93 Difference]: Finished difference Result 4020 states and 6042 transitions. [2018-11-07 18:06:00,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 18:06:00,467 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 373 [2018-11-07 18:06:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:00,478 INFO L225 Difference]: With dead ends: 4020 [2018-11-07 18:06:00,479 INFO L226 Difference]: Without dead ends: 2293 [2018-11-07 18:06:00,486 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 390 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-07 18:06:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2018-11-07 18:06:00,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2288. [2018-11-07 18:06:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2018-11-07 18:06:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3234 transitions. [2018-11-07 18:06:00,549 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3234 transitions. Word has length 373 [2018-11-07 18:06:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:00,550 INFO L480 AbstractCegarLoop]: Abstraction has 2288 states and 3234 transitions. [2018-11-07 18:06:00,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 18:06:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3234 transitions. [2018-11-07 18:06:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-11-07 18:06:00,565 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:00,565 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-11-07 18:06:00,566 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:00,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:00,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1218666634, now seen corresponding path program 1 times [2018-11-07 18:06:00,566 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:00,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:00,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:00,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:00,568 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 213 proven. 166 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-11-07 18:06:01,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:01,276 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:01,277 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 459 with the following transitions: [2018-11-07 18:06:01,277 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:01,281 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:01,281 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:01,383 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:01,683 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:06:01,683 INFO L272 AbstractInterpreter]: Visited 123 different actions 367 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:01,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:01,709 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:06:02,380 INFO L227 lantSequenceWeakener]: Weakened 150 states. On average, predicates are now at 78.1% of their original sizes. [2018-11-07 18:06:02,380 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:06:02,829 INFO L415 sIntCurrentIteration]: We unified 457 AI predicates to 457 [2018-11-07 18:06:02,830 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:06:02,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:06:02,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-07 18:06:02,830 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:02,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 18:06:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 18:06:02,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-11-07 18:06:02,832 INFO L87 Difference]: Start difference. First operand 2288 states and 3234 transitions. Second operand 22 states. [2018-11-07 18:06:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:27,836 INFO L93 Difference]: Finished difference Result 4813 states and 6860 transitions. [2018-11-07 18:06:27,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 18:06:27,836 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 458 [2018-11-07 18:06:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:27,847 INFO L225 Difference]: With dead ends: 4813 [2018-11-07 18:06:27,847 INFO L226 Difference]: Without dead ends: 2293 [2018-11-07 18:06:27,858 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 478 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2018-11-07 18:06:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2018-11-07 18:06:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2288. [2018-11-07 18:06:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2018-11-07 18:06:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3212 transitions. [2018-11-07 18:06:27,934 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3212 transitions. Word has length 458 [2018-11-07 18:06:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:27,935 INFO L480 AbstractCegarLoop]: Abstraction has 2288 states and 3212 transitions. [2018-11-07 18:06:27,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 18:06:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3212 transitions. [2018-11-07 18:06:27,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-11-07 18:06:27,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:27,956 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:27,957 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:27,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:27,957 INFO L82 PathProgramCache]: Analyzing trace with hash 870094449, now seen corresponding path program 1 times [2018-11-07 18:06:27,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:27,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:27,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:27,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:27,959 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:28,855 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:06:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 352 proven. 111 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-07 18:06:29,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:29,328 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:29,329 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 484 with the following transitions: [2018-11-07 18:06:29,329 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:29,338 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:29,338 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:29,409 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:29,604 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:06:29,605 INFO L272 AbstractInterpreter]: Visited 123 different actions 366 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:06:29,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:29,607 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:06:29,989 INFO L227 lantSequenceWeakener]: Weakened 480 states. On average, predicates are now at 80.22% of their original sizes. [2018-11-07 18:06:29,990 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:06:30,093 INFO L415 sIntCurrentIteration]: We unified 482 AI predicates to 482 [2018-11-07 18:06:30,094 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:06:30,094 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:06:30,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 18:06:30,094 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:30,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:06:30,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:06:30,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:06:30,096 INFO L87 Difference]: Start difference. First operand 2288 states and 3212 transitions. Second operand 10 states. [2018-11-07 18:06:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:34,186 INFO L93 Difference]: Finished difference Result 4400 states and 6472 transitions. [2018-11-07 18:06:34,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:06:34,186 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 483 [2018-11-07 18:06:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:34,199 INFO L225 Difference]: With dead ends: 4400 [2018-11-07 18:06:34,200 INFO L226 Difference]: Without dead ends: 2673 [2018-11-07 18:06:34,208 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 490 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:06:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2018-11-07 18:06:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2662. [2018-11-07 18:06:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2662 states. [2018-11-07 18:06:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3722 transitions. [2018-11-07 18:06:34,280 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3722 transitions. Word has length 483 [2018-11-07 18:06:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:34,281 INFO L480 AbstractCegarLoop]: Abstraction has 2662 states and 3722 transitions. [2018-11-07 18:06:34,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:06:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3722 transitions. [2018-11-07 18:06:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2018-11-07 18:06:34,300 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:34,301 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:34,301 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:34,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash 629897664, now seen corresponding path program 1 times [2018-11-07 18:06:34,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:34,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:34,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:34,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:34,303 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 354 proven. 321 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:06:35,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:35,529 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:35,529 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 551 with the following transitions: [2018-11-07 18:06:35,530 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [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], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:35,533 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:35,534 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:35,749 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:36,658 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:06:36,658 INFO L272 AbstractInterpreter]: Visited 191 different actions 954 times. Merged at 9 different actions 47 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:36,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:36,665 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:06:36,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:36,665 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:36,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:36,675 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:06:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:36,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 644 proven. 2 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-11-07 18:06:37,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 352 proven. 111 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-07 18:06:38,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:06:38,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-07 18:06:38,226 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:06:38,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:06:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:06:38,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:06:38,228 INFO L87 Difference]: Start difference. First operand 2662 states and 3722 transitions. Second operand 17 states. [2018-11-07 18:06:42,003 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-07 18:06:42,267 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-07 18:06:44,382 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-11-07 18:06:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:51,053 INFO L93 Difference]: Finished difference Result 7351 states and 11268 transitions. [2018-11-07 18:06:51,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-07 18:06:51,054 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 550 [2018-11-07 18:06:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:51,081 INFO L225 Difference]: With dead ends: 7351 [2018-11-07 18:06:51,081 INFO L226 Difference]: Without dead ends: 5250 [2018-11-07 18:06:51,107 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1198 GetRequests, 1133 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-07 18:06:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5250 states. [2018-11-07 18:06:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5250 to 5132. [2018-11-07 18:06:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5132 states. [2018-11-07 18:06:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5132 states to 5132 states and 6947 transitions. [2018-11-07 18:06:51,254 INFO L78 Accepts]: Start accepts. Automaton has 5132 states and 6947 transitions. Word has length 550 [2018-11-07 18:06:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:51,255 INFO L480 AbstractCegarLoop]: Abstraction has 5132 states and 6947 transitions. [2018-11-07 18:06:51,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:06:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5132 states and 6947 transitions. [2018-11-07 18:06:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2018-11-07 18:06:51,273 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:51,274 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:51,274 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:51,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1977321543, now seen corresponding path program 1 times [2018-11-07 18:06:51,274 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:51,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:51,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:51,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:51,276 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:52,648 WARN L179 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 18:06:52,953 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-11-07 18:06:53,063 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-11-07 18:06:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 469 proven. 457 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-11-07 18:06:53,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:53,732 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:53,732 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 557 with the following transitions: [2018-11-07 18:06:53,732 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:53,735 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:53,735 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:53,847 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:54,449 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:06:54,450 INFO L272 AbstractInterpreter]: Visited 125 different actions 622 times. Merged at 10 different actions 44 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:54,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:54,486 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:06:54,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:54,486 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:54,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:54,504 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:06:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:54,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 823 proven. 2 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2018-11-07 18:06:55,632 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 463 proven. 111 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2018-11-07 18:06:56,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:06:56,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-07 18:06:56,285 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:06:56,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:06:56,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:06:56,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:06:56,287 INFO L87 Difference]: Start difference. First operand 5132 states and 6947 transitions. Second operand 17 states. [2018-11-07 18:07:02,189 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-11-07 18:07:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:03,105 INFO L93 Difference]: Finished difference Result 11137 states and 15981 transitions. [2018-11-07 18:07:03,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-07 18:07:03,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 556 [2018-11-07 18:07:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:03,134 INFO L225 Difference]: With dead ends: 11137 [2018-11-07 18:07:03,135 INFO L226 Difference]: Without dead ends: 5451 [2018-11-07 18:07:03,170 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1170 GetRequests, 1123 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=521, Invalid=1735, Unknown=0, NotChecked=0, Total=2256 [2018-11-07 18:07:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2018-11-07 18:07:03,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 5319. [2018-11-07 18:07:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5319 states. [2018-11-07 18:07:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5319 states to 5319 states and 6325 transitions. [2018-11-07 18:07:03,407 INFO L78 Accepts]: Start accepts. Automaton has 5319 states and 6325 transitions. Word has length 556 [2018-11-07 18:07:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:03,408 INFO L480 AbstractCegarLoop]: Abstraction has 5319 states and 6325 transitions. [2018-11-07 18:07:03,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:07:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5319 states and 6325 transitions. [2018-11-07 18:07:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-11-07 18:07:03,422 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:03,422 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:03,422 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:03,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1995290852, now seen corresponding path program 2 times [2018-11-07 18:07:03,423 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:03,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:03,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:03,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:03,424 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 501 proven. 111 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-07 18:07:04,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:04,404 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:04,405 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 18:07:04,405 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 18:07:04,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:04,405 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:04,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 18:07:04,423 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 18:07:04,555 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-07 18:07:04,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 18:07:04,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 601 proven. 2 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2018-11-07 18:07:04,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 601 proven. 2 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2018-11-07 18:07:05,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:05,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 18:07:05,280 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:05,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:07:05,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:07:05,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:07:05,282 INFO L87 Difference]: Start difference. First operand 5319 states and 6325 transitions. Second operand 9 states. [2018-11-07 18:07:12,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:12,481 INFO L93 Difference]: Finished difference Result 19747 states and 28228 transitions. [2018-11-07 18:07:12,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-07 18:07:12,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 661 [2018-11-07 18:07:12,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:12,588 INFO L225 Difference]: With dead ends: 19747 [2018-11-07 18:07:12,588 INFO L226 Difference]: Without dead ends: 14989 [2018-11-07 18:07:12,648 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1350 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=460, Invalid=1796, Unknown=0, NotChecked=0, Total=2256 [2018-11-07 18:07:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14989 states. [2018-11-07 18:07:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14989 to 14712. [2018-11-07 18:07:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14712 states. [2018-11-07 18:07:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14712 states to 14712 states and 17722 transitions. [2018-11-07 18:07:13,103 INFO L78 Accepts]: Start accepts. Automaton has 14712 states and 17722 transitions. Word has length 661 [2018-11-07 18:07:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:13,104 INFO L480 AbstractCegarLoop]: Abstraction has 14712 states and 17722 transitions. [2018-11-07 18:07:13,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:07:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 14712 states and 17722 transitions. [2018-11-07 18:07:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2018-11-07 18:07:13,149 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:13,150 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:13,150 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:13,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:13,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1394874683, now seen corresponding path program 1 times [2018-11-07 18:07:13,150 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:13,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:13,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 18:07:13,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:13,152 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 508 proven. 175 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-11-07 18:07:14,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:14,094 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:14,094 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 733 with the following transitions: [2018-11-07 18:07:14,094 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:14,097 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:14,097 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:14,333 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:15,318 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:15,319 INFO L272 AbstractInterpreter]: Visited 192 different actions 966 times. Merged at 10 different actions 54 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:07:15,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:15,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:15,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:15,344 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:15,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:15,352 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:15,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 977 proven. 2 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2018-11-07 18:07:16,034 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:16,241 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 18:07:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 508 proven. 175 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-11-07 18:07:16,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:16,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:07:16,810 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:16,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:07:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:07:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:07:16,812 INFO L87 Difference]: Start difference. First operand 14712 states and 17722 transitions. Second operand 7 states. [2018-11-07 18:07:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:20,670 INFO L93 Difference]: Finished difference Result 36725 states and 53814 transitions. [2018-11-07 18:07:20,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:07:20,670 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 732 [2018-11-07 18:07:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:20,891 INFO L225 Difference]: With dead ends: 36725 [2018-11-07 18:07:20,891 INFO L226 Difference]: Without dead ends: 22574 [2018-11-07 18:07:21,086 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1480 GetRequests, 1467 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:07:21,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22574 states. [2018-11-07 18:07:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22574 to 21626. [2018-11-07 18:07:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21626 states. [2018-11-07 18:07:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 26734 transitions. [2018-11-07 18:07:21,970 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 26734 transitions. Word has length 732 [2018-11-07 18:07:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:21,971 INFO L480 AbstractCegarLoop]: Abstraction has 21626 states and 26734 transitions. [2018-11-07 18:07:21,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:07:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 26734 transitions. [2018-11-07 18:07:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2018-11-07 18:07:22,029 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:22,030 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:22,030 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:22,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:22,031 INFO L82 PathProgramCache]: Analyzing trace with hash -859870324, now seen corresponding path program 1 times [2018-11-07 18:07:22,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:22,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:22,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:22,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:22,032 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 1263 trivial. 0 not checked. [2018-11-07 18:07:22,683 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:07:22,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:07:22,687 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:07:22,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:07:22,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:07:22,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:07:22,689 INFO L87 Difference]: Start difference. First operand 21626 states and 26734 transitions. Second operand 3 states. [2018-11-07 18:07:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:24,680 INFO L93 Difference]: Finished difference Result 40039 states and 50410 transitions. [2018-11-07 18:07:24,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:07:24,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 777 [2018-11-07 18:07:24,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:24,774 INFO L225 Difference]: With dead ends: 40039 [2018-11-07 18:07:24,774 INFO L226 Difference]: Without dead ends: 18974 [2018-11-07 18:07:24,881 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:07:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18974 states. [2018-11-07 18:07:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18974 to 18858. [2018-11-07 18:07:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18858 states. [2018-11-07 18:07:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18858 states to 18858 states and 22620 transitions. [2018-11-07 18:07:25,313 INFO L78 Accepts]: Start accepts. Automaton has 18858 states and 22620 transitions. Word has length 777 [2018-11-07 18:07:25,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:25,314 INFO L480 AbstractCegarLoop]: Abstraction has 18858 states and 22620 transitions. [2018-11-07 18:07:25,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:07:25,314 INFO L276 IsEmpty]: Start isEmpty. Operand 18858 states and 22620 transitions. [2018-11-07 18:07:25,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2018-11-07 18:07:25,351 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:25,351 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:25,352 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:25,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:25,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1058703653, now seen corresponding path program 1 times [2018-11-07 18:07:25,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:25,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:25,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:25,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:25,353 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 715 proven. 2 refuted. 0 times theorem prover too weak. 1023 trivial. 0 not checked. [2018-11-07 18:07:26,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:26,351 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:26,351 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 794 with the following transitions: [2018-11-07 18:07:26,351 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [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], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:26,353 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:26,353 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:26,515 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:27,256 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:27,256 INFO L272 AbstractInterpreter]: Visited 193 different actions 971 times. Merged at 11 different actions 54 times. Widened at 1 different actions 1 times. Found 15 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:07:27,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:27,265 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:27,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:27,265 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:27,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:27,274 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:27,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 715 proven. 2 refuted. 0 times theorem prover too weak. 1023 trivial. 0 not checked. [2018-11-07 18:07:27,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 715 proven. 2 refuted. 0 times theorem prover too weak. 1023 trivial. 0 not checked. [2018-11-07 18:07:28,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:28,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-07 18:07:28,511 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:28,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:07:28,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:07:28,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:07:28,513 INFO L87 Difference]: Start difference. First operand 18858 states and 22620 transitions. Second operand 6 states. [2018-11-07 18:07:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:30,564 INFO L93 Difference]: Finished difference Result 38684 states and 47416 transitions. [2018-11-07 18:07:30,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:07:30,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 793 [2018-11-07 18:07:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:30,623 INFO L225 Difference]: With dead ends: 38684 [2018-11-07 18:07:30,623 INFO L226 Difference]: Without dead ends: 20387 [2018-11-07 18:07:30,690 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1600 GetRequests, 1587 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-11-07 18:07:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20387 states. [2018-11-07 18:07:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20387 to 20196. [2018-11-07 18:07:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20196 states. [2018-11-07 18:07:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20196 states to 20196 states and 24132 transitions. [2018-11-07 18:07:31,109 INFO L78 Accepts]: Start accepts. Automaton has 20196 states and 24132 transitions. Word has length 793 [2018-11-07 18:07:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:31,110 INFO L480 AbstractCegarLoop]: Abstraction has 20196 states and 24132 transitions. [2018-11-07 18:07:31,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:07:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20196 states and 24132 transitions. [2018-11-07 18:07:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2018-11-07 18:07:31,158 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:31,159 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:31,159 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:31,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:31,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2107068078, now seen corresponding path program 1 times [2018-11-07 18:07:31,160 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:31,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:31,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:31,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:31,161 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:31,866 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:07:32,055 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:07:32,484 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:07:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1899 backedges. 552 proven. 909 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2018-11-07 18:07:33,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:33,826 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:33,827 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 827 with the following transitions: [2018-11-07 18:07:33,827 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [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], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:33,831 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:33,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:33,892 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:34,726 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:34,726 INFO L272 AbstractInterpreter]: Visited 193 different actions 970 times. Merged at 11 different actions 53 times. Widened at 1 different actions 1 times. Found 15 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:07:34,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:34,749 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:34,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:34,750 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:34,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:34,759 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:34,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1899 backedges. 1398 proven. 2 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2018-11-07 18:07:35,964 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1899 backedges. 598 proven. 221 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2018-11-07 18:07:36,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:36,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-07 18:07:36,710 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:36,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:07:36,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:07:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:07:36,712 INFO L87 Difference]: Start difference. First operand 20196 states and 24132 transitions. Second operand 17 states. [2018-11-07 18:07:40,600 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-07 18:07:41,454 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2018-11-07 18:07:41,730 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-07 18:07:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:43,908 INFO L93 Difference]: Finished difference Result 40343 states and 48715 transitions. [2018-11-07 18:07:43,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-07 18:07:43,915 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 826 [2018-11-07 18:07:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:43,962 INFO L225 Difference]: With dead ends: 40343 [2018-11-07 18:07:43,962 INFO L226 Difference]: Without dead ends: 18980 [2018-11-07 18:07:44,030 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1724 GetRequests, 1674 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-07 18:07:44,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18980 states. [2018-11-07 18:07:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18980 to 18370. [2018-11-07 18:07:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18370 states. [2018-11-07 18:07:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18370 states to 18370 states and 21290 transitions. [2018-11-07 18:07:44,364 INFO L78 Accepts]: Start accepts. Automaton has 18370 states and 21290 transitions. Word has length 826 [2018-11-07 18:07:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:44,365 INFO L480 AbstractCegarLoop]: Abstraction has 18370 states and 21290 transitions. [2018-11-07 18:07:44,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:07:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 18370 states and 21290 transitions. [2018-11-07 18:07:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2018-11-07 18:07:44,403 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:44,404 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:44,405 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:44,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:44,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1811770136, now seen corresponding path program 1 times [2018-11-07 18:07:44,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:44,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:44,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:44,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:44,406 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3195 backedges. 642 proven. 1475 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2018-11-07 18:07:47,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:47,256 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:47,257 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1037 with the following transitions: [2018-11-07 18:07:47,257 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [667], [671], [675], [679], [683], [686], [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], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:47,259 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:47,260 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:47,306 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:48,189 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:48,189 INFO L272 AbstractInterpreter]: Visited 195 different actions 991 times. Merged at 12 different actions 64 times. Widened at 1 different actions 1 times. Found 21 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:07:48,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:48,197 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:48,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:48,197 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:48,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:48,205 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:48,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3195 backedges. 2176 proven. 2 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2018-11-07 18:07:48,934 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3195 backedges. 643 proven. 470 refuted. 0 times theorem prover too weak. 2082 trivial. 0 not checked. [2018-11-07 18:07:50,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:50,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-07 18:07:50,100 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:50,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:07:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:07:50,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:07:50,102 INFO L87 Difference]: Start difference. First operand 18370 states and 21290 transitions. Second operand 18 states. [2018-11-07 18:07:51,563 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-11-07 18:07:56,772 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-11-07 18:07:56,949 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2018-11-07 18:07:58,190 WARN L179 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2018-11-07 18:07:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:59,357 INFO L93 Difference]: Finished difference Result 35694 states and 41562 transitions. [2018-11-07 18:07:59,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-07 18:07:59,358 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1036 [2018-11-07 18:07:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:59,397 INFO L225 Difference]: With dead ends: 35694 [2018-11-07 18:07:59,398 INFO L226 Difference]: Without dead ends: 17515 [2018-11-07 18:07:59,436 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2155 GetRequests, 2095 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=774, Invalid=3008, Unknown=0, NotChecked=0, Total=3782 [2018-11-07 18:07:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17515 states. [2018-11-07 18:07:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17515 to 17446. [2018-11-07 18:07:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17446 states. [2018-11-07 18:07:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17446 states to 17446 states and 19423 transitions. [2018-11-07 18:07:59,704 INFO L78 Accepts]: Start accepts. Automaton has 17446 states and 19423 transitions. Word has length 1036 [2018-11-07 18:07:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:59,705 INFO L480 AbstractCegarLoop]: Abstraction has 17446 states and 19423 transitions. [2018-11-07 18:07:59,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:07:59,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17446 states and 19423 transitions. [2018-11-07 18:07:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1082 [2018-11-07 18:07:59,732 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:59,733 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:59,733 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:59,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1882226375, now seen corresponding path program 1 times [2018-11-07 18:07:59,734 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:59,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:59,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:59,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:59,735 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 923 proven. 1645 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2018-11-07 18:08:02,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:08:02,923 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:08:02,923 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1082 with the following transitions: [2018-11-07 18:08:02,924 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [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], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:08:02,926 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:08:02,927 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:08:02,989 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:08:03,999 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:08:03,999 INFO L272 AbstractInterpreter]: Visited 195 different actions 1184 times. Merged at 12 different actions 73 times. Widened at 1 different actions 2 times. Found 28 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:08:04,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:04,009 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:08:04,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:08:04,009 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:08:04,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:04,018 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:08:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:04,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:08:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 1605 proven. 2 refuted. 0 times theorem prover too weak. 1678 trivial. 0 not checked. [2018-11-07 18:08:05,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:08:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 920 proven. 111 refuted. 0 times theorem prover too weak. 2254 trivial. 0 not checked. [2018-11-07 18:08:07,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:08:07,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 19 [2018-11-07 18:08:07,305 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:08:07,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:08:07,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:08:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:08:07,307 INFO L87 Difference]: Start difference. First operand 17446 states and 19423 transitions. Second operand 18 states. [2018-11-07 18:08:12,059 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2018-11-07 18:08:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:08:12,565 INFO L93 Difference]: Finished difference Result 34737 states and 38732 transitions. [2018-11-07 18:08:12,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-07 18:08:12,565 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1081 [2018-11-07 18:08:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:08:12,592 INFO L225 Difference]: With dead ends: 34737 [2018-11-07 18:08:12,592 INFO L226 Difference]: Without dead ends: 17482 [2018-11-07 18:08:12,618 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2237 GetRequests, 2186 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=491, Invalid=1861, Unknown=0, NotChecked=0, Total=2352 [2018-11-07 18:08:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17482 states. [2018-11-07 18:08:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17482 to 17385. [2018-11-07 18:08:12,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17385 states. [2018-11-07 18:08:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17385 states to 17385 states and 18705 transitions. [2018-11-07 18:08:12,839 INFO L78 Accepts]: Start accepts. Automaton has 17385 states and 18705 transitions. Word has length 1081 [2018-11-07 18:08:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:08:12,839 INFO L480 AbstractCegarLoop]: Abstraction has 17385 states and 18705 transitions. [2018-11-07 18:08:12,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:08:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 17385 states and 18705 transitions. [2018-11-07 18:08:12,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1152 [2018-11-07 18:08:12,866 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:08:12,867 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:08:12,867 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:08:12,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:12,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1187239141, now seen corresponding path program 1 times [2018-11-07 18:08:12,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:08:12,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:12,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:12,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:12,869 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:08:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3467 backedges. 1561 proven. 222 refuted. 0 times theorem prover too weak. 1684 trivial. 0 not checked. [2018-11-07 18:08:14,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:08:14,369 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:08:14,369 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1152 with the following transitions: [2018-11-07 18:08:14,369 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], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [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], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [935], [939], [943], [946], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:08:14,372 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:08:14,372 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:08:14,528 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:08:15,348 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:08:15,348 INFO L272 AbstractInterpreter]: Visited 198 different actions 1202 times. Merged at 12 different actions 73 times. Widened at 1 different actions 2 times. Found 28 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:08:15,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:15,354 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:08:15,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:08:15,354 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:08:15,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:15,363 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:08:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:15,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:08:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3467 backedges. 2246 proven. 6 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2018-11-07 18:08:16,772 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:08:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3467 backedges. 1561 proven. 395 refuted. 0 times theorem prover too weak. 1511 trivial. 0 not checked. [2018-11-07 18:08:18,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:08:18,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2018-11-07 18:08:18,075 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:08:18,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:08:18,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:08:18,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:08:18,076 INFO L87 Difference]: Start difference. First operand 17385 states and 18705 transitions. Second operand 9 states. Received shutdown request... [2018-11-07 18:08:19,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:08:19,958 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:08:19,964 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:08:19,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:08:19 BoogieIcfgContainer [2018-11-07 18:08:19,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:08:19,965 INFO L168 Benchmark]: Toolchain (without parser) took 213207.55 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.0 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-11-07 18:08:19,966 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:08:19,967 INFO L168 Benchmark]: CACSL2BoogieTranslator took 758.81 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:08:19,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 161.83 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 725.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -820.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2018-11-07 18:08:19,968 INFO L168 Benchmark]: Boogie Preprocessor took 131.20 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. [2018-11-07 18:08:19,969 INFO L168 Benchmark]: RCFGBuilder took 3634.57 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: 132.4 MB). Peak memory consumption was 132.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:08:19,969 INFO L168 Benchmark]: TraceAbstraction took 208515.62 ms. Allocated memory was 2.2 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -678.8 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-11-07 18:08:19,974 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 758.81 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 161.83 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 725.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -820.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.20 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 3634.57 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: 132.4 MB). Peak memory consumption was 132.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208515.62 ms. Allocated memory was 2.2 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -678.8 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 94). Cancelled while BasicCegarLoop was constructing difference of abstraction (17385states) and FLOYD_HOARE automaton (currently 10 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (9435 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 208.4s OverallTime, 18 OverallIterations, 9 TraceHistogramMax, 147.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2543 SDtfs, 40009 SDslu, 4555 SDs, 0 SdLazy, 51627 SolverSat, 7258 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 66.5s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 17285 GetRequests, 16768 SyntacticMatches, 14 SemanticMatches, 503 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5952 ImplicationChecksByTransitivity, 25.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21626occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.0s AbstIntTime, 13 AbstIntIterations, 5 AbstIntStrong, 0.997287355066603 AbsIntWeakeningRatio, 0.08654848800834203 AbsIntAvgWeakeningVarsNumRemoved, 18.291449426485922 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.9s AutomataMinimizationTime, 17 MinimizatonAttempts, 2595 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 27.8s InterpolantComputationTime, 17766 NumberOfCodeBlocks, 17434 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 25116 ConstructedInterpolants, 0 QuantifiedInterpolants, 79885140 SizeOfPredicates, 28 NumberOfNonLiveVariables, 10002 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 36 InterpolantComputations, 4 PerfectInterpolantSequences, 50324/58150 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown