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/Problem17_label51_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 21:07:45,858 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 21:07:45,860 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 21:07:45,873 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 21:07:45,873 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 21:07:45,874 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 21:07:45,876 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 21:07:45,877 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 21:07:45,879 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 21:07:45,880 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 21:07:45,881 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 21:07:45,882 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 21:07:45,883 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 21:07:45,884 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 21:07:45,885 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 21:07:45,886 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 21:07:45,887 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 21:07:45,889 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 21:07:45,891 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 21:07:45,893 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 21:07:45,894 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 21:07:45,896 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 21:07:45,898 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 21:07:45,898 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 21:07:45,899 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 21:07:45,900 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 21:07:45,901 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 21:07:45,901 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 21:07:45,902 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 21:07:45,904 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 21:07:45,904 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 21:07:45,905 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 21:07:45,905 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 21:07:45,905 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 21:07:45,906 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 21:07:45,907 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 21:07:45,907 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 21:07:45,931 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 21:07:45,933 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 21:07:45,934 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 21:07:45,934 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 21:07:45,934 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 21:07:45,934 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 21:07:45,935 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 21:07:45,935 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 21:07:45,935 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 21:07:45,936 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 21:07:45,936 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 21:07:45,936 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 21:07:45,936 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 21:07:45,937 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 21:07:45,938 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 21:07:45,938 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 21:07:45,938 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 21:07:45,938 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 21:07:45,939 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 21:07:45,939 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 21:07:45,939 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 21:07:45,939 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 21:07:45,939 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 21:07:45,941 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 21:07:45,941 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 21:07:45,942 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 21:07:45,942 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 21:07:45,942 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 21:07:45,942 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 21:07:45,943 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 21:07:45,943 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 21:07:45,943 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 21:07:45,943 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 21:07:45,943 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 21:07:45,944 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 21:07:46,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 21:07:46,031 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 21:07:46,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 21:07:46,036 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 21:07:46,037 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 21:07:46,038 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label51_true-unreach-call.c [2018-11-07 21:07:46,101 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0829711/00d14249308a4cefa40ba029e20fc87b/FLAG463621bcf [2018-11-07 21:07:46,873 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 21:07:46,874 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label51_true-unreach-call.c [2018-11-07 21:07:46,910 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0829711/00d14249308a4cefa40ba029e20fc87b/FLAG463621bcf [2018-11-07 21:07:46,928 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0829711/00d14249308a4cefa40ba029e20fc87b [2018-11-07 21:07:46,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 21:07:46,944 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 21:07:46,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 21:07:46,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 21:07:46,951 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 21:07:46,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:07:46" (1/1) ... [2018-11-07 21:07:46,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de4c151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:46, skipping insertion in model container [2018-11-07 21:07:46,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:07:46" (1/1) ... [2018-11-07 21:07:46,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 21:07:47,083 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 21:07:48,030 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 21:07:48,036 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 21:07:48,454 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 21:07:48,480 INFO L193 MainTranslator]: Completed translation [2018-11-07 21:07:48,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48 WrapperNode [2018-11-07 21:07:48,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 21:07:48,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 21:07:48,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 21:07:48,483 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 21:07:48,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (1/1) ... [2018-11-07 21:07:48,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (1/1) ... [2018-11-07 21:07:48,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 21:07:48,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 21:07:48,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 21:07:48,806 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 21:07:48,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (1/1) ... [2018-11-07 21:07:48,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (1/1) ... [2018-11-07 21:07:48,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (1/1) ... [2018-11-07 21:07:48,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (1/1) ... [2018-11-07 21:07:48,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (1/1) ... [2018-11-07 21:07:48,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (1/1) ... [2018-11-07 21:07:49,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (1/1) ... [2018-11-07 21:07:49,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 21:07:49,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 21:07:49,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 21:07:49,055 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 21:07:49,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (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 21:07:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 21:07:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 21:07:49,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 21:07:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 21:07:49,133 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 21:07:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 21:07:49,134 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 21:07:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 21:07:49,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 21:07:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 21:07:49,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 21:07:56,601 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 21:07:56,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:07:56 BoogieIcfgContainer [2018-11-07 21:07:56,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 21:07:56,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 21:07:56,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 21:07:56,608 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 21:07:56,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 09:07:46" (1/3) ... [2018-11-07 21:07:56,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81a26dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:07:56, skipping insertion in model container [2018-11-07 21:07:56,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:07:48" (2/3) ... [2018-11-07 21:07:56,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81a26dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:07:56, skipping insertion in model container [2018-11-07 21:07:56,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:07:56" (3/3) ... [2018-11-07 21:07:56,612 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label51_true-unreach-call.c [2018-11-07 21:07:56,622 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 21:07:56,631 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 21:07:56,650 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 21:07:56,698 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 21:07:56,698 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 21:07:56,698 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 21:07:56,699 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 21:07:56,699 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 21:07:56,699 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 21:07:56,699 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 21:07:56,699 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 21:07:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 21:07:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-07 21:07:56,750 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:07:56,751 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:07:56,753 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:07:56,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:56,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2022037956, now seen corresponding path program 1 times [2018-11-07 21:07:56,761 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:07:56,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:56,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:56,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:56,812 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:07:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:57,339 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-07 21:07:57,361 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 21:07:57,364 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:07:57,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 21:07:57,364 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:07:57,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 21:07:57,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 21:07:57,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:07:57,424 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 21:08:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:08:08,705 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-11-07 21:08:08,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 21:08:08,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-11-07 21:08:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:08:08,740 INFO L225 Difference]: With dead ends: 2164 [2018-11-07 21:08:08,740 INFO L226 Difference]: Without dead ends: 1554 [2018-11-07 21:08:08,750 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:08:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-11-07 21:08:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1051. [2018-11-07 21:08:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-11-07 21:08:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1880 transitions. [2018-11-07 21:08:08,890 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1880 transitions. Word has length 44 [2018-11-07 21:08:08,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:08:08,891 INFO L480 AbstractCegarLoop]: Abstraction has 1051 states and 1880 transitions. [2018-11-07 21:08:08,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 21:08:08,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1880 transitions. [2018-11-07 21:08:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-07 21:08:08,906 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:08:08,906 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:08,907 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:08:08,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:08,907 INFO L82 PathProgramCache]: Analyzing trace with hash 760811562, now seen corresponding path program 1 times [2018-11-07 21:08:08,907 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:08:08,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:08,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:08,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:08,910 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:08:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:09,319 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 21:08:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:09,539 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:08:09,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 21:08:09,540 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:08:09,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 21:08:09,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 21:08:09,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 21:08:09,545 INFO L87 Difference]: Start difference. First operand 1051 states and 1880 transitions. Second operand 5 states. [2018-11-07 21:08:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:08:16,194 INFO L93 Difference]: Finished difference Result 3028 states and 5532 transitions. [2018-11-07 21:08:16,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 21:08:16,194 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2018-11-07 21:08:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:08:16,213 INFO L225 Difference]: With dead ends: 3028 [2018-11-07 21:08:16,214 INFO L226 Difference]: Without dead ends: 1983 [2018-11-07 21:08:16,218 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 21:08:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2018-11-07 21:08:16,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1957. [2018-11-07 21:08:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1957 states. [2018-11-07 21:08:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3236 transitions. [2018-11-07 21:08:16,310 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3236 transitions. Word has length 116 [2018-11-07 21:08:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:08:16,310 INFO L480 AbstractCegarLoop]: Abstraction has 1957 states and 3236 transitions. [2018-11-07 21:08:16,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 21:08:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3236 transitions. [2018-11-07 21:08:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-11-07 21:08:16,319 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:08:16,319 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:16,319 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:08:16,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:16,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1743388018, now seen corresponding path program 1 times [2018-11-07 21:08:16,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:08:16,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:16,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:16,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:16,322 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:08:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:16,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:16,981 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:08:16,982 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 120 with the following transitions: [2018-11-07 21:08:16,984 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:08:17,033 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:08:17,034 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:08:17,524 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:08:18,130 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:08:18,131 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:08:18,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:18,193 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:08:18,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:18,193 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 21:08:18,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:18,208 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:08:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:18,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:08:22,847 WARN L179 SmtUtils]: Spent 4.11 s on a formula simplification that was a NOOP. DAG size: 42 [2018-11-07 21:08:23,712 WARN L179 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2018-11-07 21:08:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:23,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:08:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:24,823 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 21:08:24,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-11-07 21:08:24,823 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:08:24,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 21:08:24,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 21:08:24,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-07 21:08:24,824 INFO L87 Difference]: Start difference. First operand 1957 states and 3236 transitions. Second operand 6 states. [2018-11-07 21:08:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:08:36,966 INFO L93 Difference]: Finished difference Result 7514 states and 12887 transitions. [2018-11-07 21:08:36,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 21:08:36,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2018-11-07 21:08:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:08:37,006 INFO L225 Difference]: With dead ends: 7514 [2018-11-07 21:08:37,006 INFO L226 Difference]: Without dead ends: 5563 [2018-11-07 21:08:37,022 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-07 21:08:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2018-11-07 21:08:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5553. [2018-11-07 21:08:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5553 states. [2018-11-07 21:08:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 9337 transitions. [2018-11-07 21:08:37,200 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 9337 transitions. Word has length 119 [2018-11-07 21:08:37,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:08:37,200 INFO L480 AbstractCegarLoop]: Abstraction has 5553 states and 9337 transitions. [2018-11-07 21:08:37,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 21:08:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 9337 transitions. [2018-11-07 21:08:37,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-07 21:08:37,205 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:08:37,205 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:37,206 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:08:37,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:37,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1915585398, now seen corresponding path program 1 times [2018-11-07 21:08:37,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:08:37,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:37,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:37,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:37,208 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:08:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:37,496 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 21:08:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:37,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:37,686 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:08:37,687 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 133 with the following transitions: [2018-11-07 21:08:37,687 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:08:37,693 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:08:37,694 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:08:37,822 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:08:38,422 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:08:38,423 INFO L272 AbstractInterpreter]: Visited 96 different actions 274 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:08:38,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:38,472 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:08:38,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:38,472 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 21:08:38,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:38,487 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:08:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:38,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:08:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:38,716 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:08:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:38,913 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 21:08:38,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-07 21:08:38,913 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:08:38,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 21:08:38,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 21:08:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 21:08:38,914 INFO L87 Difference]: Start difference. First operand 5553 states and 9337 transitions. Second operand 3 states. [2018-11-07 21:08:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:08:42,298 INFO L93 Difference]: Finished difference Result 13722 states and 22947 transitions. [2018-11-07 21:08:42,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 21:08:42,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2018-11-07 21:08:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:08:42,342 INFO L225 Difference]: With dead ends: 13722 [2018-11-07 21:08:42,342 INFO L226 Difference]: Without dead ends: 8175 [2018-11-07 21:08:42,376 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 263 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 21:08:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2018-11-07 21:08:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8174. [2018-11-07 21:08:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8174 states. [2018-11-07 21:08:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8174 states to 8174 states and 12761 transitions. [2018-11-07 21:08:42,579 INFO L78 Accepts]: Start accepts. Automaton has 8174 states and 12761 transitions. Word has length 132 [2018-11-07 21:08:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:08:42,580 INFO L480 AbstractCegarLoop]: Abstraction has 8174 states and 12761 transitions. [2018-11-07 21:08:42,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 21:08:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 8174 states and 12761 transitions. [2018-11-07 21:08:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-07 21:08:42,588 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:08:42,588 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:08:42,589 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:08:42,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:42,589 INFO L82 PathProgramCache]: Analyzing trace with hash 806945292, now seen corresponding path program 1 times [2018-11-07 21:08:42,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:08:42,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:42,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:42,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:42,591 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:08:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:42,856 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 21:08:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 75 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 21:08:42,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:42,917 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:08:42,917 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-11-07 21:08:42,918 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1329], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:08:42,924 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:08:42,925 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:08:43,066 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:08:43,549 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:08:43,549 INFO L272 AbstractInterpreter]: Visited 107 different actions 307 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:08:43,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:43,577 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:08:43,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:43,578 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 21:08:43,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:43,593 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:08:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:43,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:08:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:44,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:08:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:44,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:08:44,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 21:08:44,450 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:08:44,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 21:08:44,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 21:08:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-07 21:08:44,451 INFO L87 Difference]: Start difference. First operand 8174 states and 12761 transitions. Second operand 9 states. [2018-11-07 21:08:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:08:50,344 INFO L93 Difference]: Finished difference Result 16001 states and 25145 transitions. [2018-11-07 21:08:50,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 21:08:50,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 217 [2018-11-07 21:08:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:08:50,381 INFO L225 Difference]: With dead ends: 16001 [2018-11-07 21:08:50,382 INFO L226 Difference]: Without dead ends: 6863 [2018-11-07 21:08:50,415 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 432 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-11-07 21:08:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6863 states. [2018-11-07 21:08:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6863 to 6830. [2018-11-07 21:08:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6830 states. [2018-11-07 21:08:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6830 states to 6830 states and 8191 transitions. [2018-11-07 21:08:50,565 INFO L78 Accepts]: Start accepts. Automaton has 6830 states and 8191 transitions. Word has length 217 [2018-11-07 21:08:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:08:50,566 INFO L480 AbstractCegarLoop]: Abstraction has 6830 states and 8191 transitions. [2018-11-07 21:08:50,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 21:08:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 6830 states and 8191 transitions. [2018-11-07 21:08:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-11-07 21:08:50,571 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:08:50,572 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:08:50,572 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:08:50,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 559446539, now seen corresponding path program 1 times [2018-11-07 21:08:50,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:08:50,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:50,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:50,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:50,574 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:08:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 21:08:50,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:08:50,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 21:08:50,861 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:08:50,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 21:08:50,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 21:08:50,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 21:08:50,862 INFO L87 Difference]: Start difference. First operand 6830 states and 8191 transitions. Second operand 3 states. [2018-11-07 21:08:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:08:55,430 INFO L93 Difference]: Finished difference Result 19841 states and 24164 transitions. [2018-11-07 21:08:55,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 21:08:55,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 298 [2018-11-07 21:08:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:08:55,473 INFO L225 Difference]: With dead ends: 19841 [2018-11-07 21:08:55,473 INFO L226 Difference]: Without dead ends: 11247 [2018-11-07 21:08:55,495 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 21:08:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11247 states. [2018-11-07 21:08:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11247 to 10811. [2018-11-07 21:08:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10811 states. [2018-11-07 21:08:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10811 states to 10811 states and 12697 transitions. [2018-11-07 21:08:55,879 INFO L78 Accepts]: Start accepts. Automaton has 10811 states and 12697 transitions. Word has length 298 [2018-11-07 21:08:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:08:55,879 INFO L480 AbstractCegarLoop]: Abstraction has 10811 states and 12697 transitions. [2018-11-07 21:08:55,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 21:08:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 10811 states and 12697 transitions. [2018-11-07 21:08:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-11-07 21:08:55,895 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:08:55,895 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:55,896 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:08:55,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1770846151, now seen corresponding path program 1 times [2018-11-07 21:08:55,896 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:08:55,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:55,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:55,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:55,900 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:08:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:56,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:56,598 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:08:56,598 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 393 with the following transitions: [2018-11-07 21:08:56,599 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [273], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:08:56,610 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:08:56,610 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:08:59,959 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:08:59,959 INFO L272 AbstractInterpreter]: Visited 356 different actions 2105 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:08:59,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:59,998 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:08:59,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:59,998 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 21:09:00,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:09:00,013 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:09:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:09:00,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:09:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:09:00,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:09:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:09:00,763 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 21:09:00,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-11-07 21:09:00,764 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:09:00,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 21:09:00,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 21:09:00,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-11-07 21:09:00,765 INFO L87 Difference]: Start difference. First operand 10811 states and 12697 transitions. Second operand 6 states. [2018-11-07 21:09:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:09:08,786 INFO L93 Difference]: Finished difference Result 23821 states and 28046 transitions. [2018-11-07 21:09:08,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 21:09:08,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 392 [2018-11-07 21:09:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:09:08,825 INFO L225 Difference]: With dead ends: 23821 [2018-11-07 21:09:08,825 INFO L226 Difference]: Without dead ends: 12577 [2018-11-07 21:09:08,839 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 783 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-11-07 21:09:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12577 states. [2018-11-07 21:09:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12577 to 11696. [2018-11-07 21:09:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11696 states. [2018-11-07 21:09:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11696 states to 11696 states and 13739 transitions. [2018-11-07 21:09:09,068 INFO L78 Accepts]: Start accepts. Automaton has 11696 states and 13739 transitions. Word has length 392 [2018-11-07 21:09:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:09:09,069 INFO L480 AbstractCegarLoop]: Abstraction has 11696 states and 13739 transitions. [2018-11-07 21:09:09,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 21:09:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 11696 states and 13739 transitions. [2018-11-07 21:09:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2018-11-07 21:09:09,090 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:09:09,091 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:09:09,091 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:09:09,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:09:09,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1546186328, now seen corresponding path program 1 times [2018-11-07 21:09:09,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:09:09,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:09:09,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:09:09,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:09:09,094 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:09:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:09:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 422 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-07 21:09:09,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:09:09,942 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:09:09,942 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 490 with the following transitions: [2018-11-07 21:09:09,942 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1266], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1329], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1720], [1723], [1727], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:09:09,955 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:09:09,955 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:09:10,011 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:09:12,129 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:09:12,129 INFO L272 AbstractInterpreter]: Visited 186 different actions 1114 times. Merged at 9 different actions 56 times. Widened at 1 different actions 2 times. Found 13 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 21:09:12,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:09:12,139 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:09:12,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:09:12,139 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 21:09:12,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:09:12,148 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:09:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:09:12,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:09:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 422 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-07 21:09:12,529 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:09:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 422 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-07 21:09:12,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:09:12,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 21:09:12,903 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:09:12,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 21:09:12,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 21:09:12,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 21:09:12,905 INFO L87 Difference]: Start difference. First operand 11696 states and 13739 transitions. Second operand 7 states. [2018-11-07 21:09:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:09:21,106 INFO L93 Difference]: Finished difference Result 31145 states and 37825 transitions. [2018-11-07 21:09:21,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 21:09:21,107 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 489 [2018-11-07 21:09:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:09:21,167 INFO L225 Difference]: With dead ends: 31145 [2018-11-07 21:09:21,167 INFO L226 Difference]: Without dead ends: 19454 [2018-11-07 21:09:21,187 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 997 GetRequests, 982 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-11-07 21:09:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19454 states. [2018-11-07 21:09:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19454 to 18534. [2018-11-07 21:09:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18534 states. [2018-11-07 21:09:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18534 states to 18534 states and 22027 transitions. [2018-11-07 21:09:21,826 INFO L78 Accepts]: Start accepts. Automaton has 18534 states and 22027 transitions. Word has length 489 [2018-11-07 21:09:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:09:21,827 INFO L480 AbstractCegarLoop]: Abstraction has 18534 states and 22027 transitions. [2018-11-07 21:09:21,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 21:09:21,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18534 states and 22027 transitions. [2018-11-07 21:09:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2018-11-07 21:09:21,856 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:09:21,856 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:21,856 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:09:21,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:09:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1817005450, now seen corresponding path program 1 times [2018-11-07 21:09:21,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:09:21,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:09:21,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:09:21,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:09:21,858 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:09:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:09:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 121 proven. 159 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-07 21:09:22,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:09:22,744 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:09:22,744 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 501 with the following transitions: [2018-11-07 21:09:22,745 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2275], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:09:22,750 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:09:22,751 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:09:22,842 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:09:25,222 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:09:25,223 INFO L272 AbstractInterpreter]: Visited 299 different actions 1492 times. Merged at 8 different actions 42 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 21:09:25,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:09:25,236 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:09:25,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:09:25,236 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 21:09:25,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:09:25,246 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:09:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:09:25,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:09:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-11-07 21:09:26,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:09:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 121 proven. 231 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 21:09:26,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:09:26,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-11-07 21:09:26,930 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:09:26,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 21:09:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 21:09:26,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-11-07 21:09:26,931 INFO L87 Difference]: Start difference. First operand 18534 states and 22027 transitions. Second operand 9 states. [2018-11-07 21:09:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:09:40,019 INFO L93 Difference]: Finished difference Result 46366 states and 55242 transitions. [2018-11-07 21:09:40,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 21:09:40,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 500 [2018-11-07 21:09:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:09:40,086 INFO L225 Difference]: With dead ends: 46366 [2018-11-07 21:09:40,087 INFO L226 Difference]: Without dead ends: 27850 [2018-11-07 21:09:40,110 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 1004 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2018-11-07 21:09:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27850 states. [2018-11-07 21:09:40,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27850 to 25630. [2018-11-07 21:09:40,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25630 states. [2018-11-07 21:09:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25630 states to 25630 states and 30637 transitions. [2018-11-07 21:09:40,552 INFO L78 Accepts]: Start accepts. Automaton has 25630 states and 30637 transitions. Word has length 500 [2018-11-07 21:09:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:09:40,553 INFO L480 AbstractCegarLoop]: Abstraction has 25630 states and 30637 transitions. [2018-11-07 21:09:40,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 21:09:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 25630 states and 30637 transitions. [2018-11-07 21:09:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2018-11-07 21:09:40,594 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:09:40,594 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:09:40,595 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:09:40,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:09:40,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1626546296, now seen corresponding path program 1 times [2018-11-07 21:09:40,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:09:40,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:09:40,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:09:40,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:09:40,596 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:09:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:09:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 500 proven. 2 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-11-07 21:09:41,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:09:41,334 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:09:41,335 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 587 with the following transitions: [2018-11-07 21:09:41,335 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1600], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1810], [1815], [1817], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:09:41,339 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:09:41,339 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:09:41,389 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:09:42,764 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:09:42,764 INFO L272 AbstractInterpreter]: Visited 205 different actions 1225 times. Merged at 9 different actions 57 times. Widened at 1 different actions 2 times. Found 12 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 21:09:42,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:09:42,790 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:09:42,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:09:42,790 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 21:09:42,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:09:42,803 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:09:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:09:42,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:09:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 500 proven. 2 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-11-07 21:09:43,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:09:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 500 proven. 2 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-11-07 21:09:43,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:09:43,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-11-07 21:09:43,851 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:09:43,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 21:09:43,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 21:09:43,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 21:09:43,853 INFO L87 Difference]: Start difference. First operand 25630 states and 30637 transitions. Second operand 7 states. [2018-11-07 21:09:49,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:09:49,541 INFO L93 Difference]: Finished difference Result 65677 states and 79895 transitions. [2018-11-07 21:09:49,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 21:09:49,541 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 586 [2018-11-07 21:09:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:09:49,642 INFO L225 Difference]: With dead ends: 65677 [2018-11-07 21:09:49,642 INFO L226 Difference]: Without dead ends: 37858 [2018-11-07 21:09:49,687 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1180 GetRequests, 1170 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-11-07 21:09:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37858 states. [2018-11-07 21:09:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37858 to 33990. [2018-11-07 21:09:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33990 states. [2018-11-07 21:09:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33990 states to 33990 states and 40668 transitions. [2018-11-07 21:09:50,332 INFO L78 Accepts]: Start accepts. Automaton has 33990 states and 40668 transitions. Word has length 586 [2018-11-07 21:09:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:09:50,333 INFO L480 AbstractCegarLoop]: Abstraction has 33990 states and 40668 transitions. [2018-11-07 21:09:50,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 21:09:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 33990 states and 40668 transitions. [2018-11-07 21:09:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2018-11-07 21:09:50,381 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:09:50,382 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:50,382 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:09:50,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:09:50,383 INFO L82 PathProgramCache]: Analyzing trace with hash 832784655, now seen corresponding path program 1 times [2018-11-07 21:09:50,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:09:50,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:09:50,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:09:50,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:09:50,384 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:09:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:09:50,981 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 6 [2018-11-07 21:09:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 430 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-11-07 21:09:51,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:09:51,521 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:09:51,521 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 612 with the following transitions: [2018-11-07 21:09:51,522 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1356], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2275], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:09:51,528 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:09:51,528 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:09:51,627 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:09:54,845 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:09:54,846 INFO L272 AbstractInterpreter]: Visited 300 different actions 1810 times. Merged at 9 different actions 66 times. Widened at 1 different actions 2 times. Found 15 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 21:09:54,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:09:54,853 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:09:54,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:09:54,854 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 21:09:54,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:09:54,863 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:09:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:09:55,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:09:55,371 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 22 [2018-11-07 21:09:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-11-07 21:09:55,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:09:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-11-07 21:09:56,932 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 21:09:56,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2018-11-07 21:09:56,933 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:09:56,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 21:09:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 21:09:56,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-11-07 21:09:56,934 INFO L87 Difference]: Start difference. First operand 33990 states and 40668 transitions. Second operand 3 states. [2018-11-07 21:10:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:10:49,314 INFO L93 Difference]: Finished difference Result 78504 states and 95218 transitions. [2018-11-07 21:10:49,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 21:10:49,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 611 [2018-11-07 21:10:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:10:49,431 INFO L225 Difference]: With dead ends: 78504 [2018-11-07 21:10:49,431 INFO L226 Difference]: Without dead ends: 45393 [2018-11-07 21:10:49,481 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 1221 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-11-07 21:10:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45393 states. [2018-11-07 21:10:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45393 to 44082. [2018-11-07 21:10:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44082 states. [2018-11-07 21:10:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44082 states to 44082 states and 52810 transitions. [2018-11-07 21:10:50,155 INFO L78 Accepts]: Start accepts. Automaton has 44082 states and 52810 transitions. Word has length 611 [2018-11-07 21:10:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:10:50,156 INFO L480 AbstractCegarLoop]: Abstraction has 44082 states and 52810 transitions. [2018-11-07 21:10:50,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 21:10:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 44082 states and 52810 transitions. [2018-11-07 21:10:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2018-11-07 21:10:50,228 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:10:50,228 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, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:50,229 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:10:50,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:10:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1388840388, now seen corresponding path program 1 times [2018-11-07 21:10:50,229 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:10:50,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:10:50,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:10:50,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:10:50,230 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:10:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:10:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2018-11-07 21:10:50,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:10:50,715 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:10:50,715 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 692 with the following transitions: [2018-11-07 21:10:50,716 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1356], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1670], [1673], [1677], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1861], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:10:50,720 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:10:50,721 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:10:50,763 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:10:52,219 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:10:52,219 INFO L272 AbstractInterpreter]: Visited 216 different actions 1079 times. Merged at 8 different actions 45 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 21:10:52,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:10:52,226 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:10:52,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:10:52,226 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 21:10:52,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:10:52,244 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:10:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:10:52,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:10:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 596 proven. 0 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2018-11-07 21:10:52,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:10:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2018-11-07 21:10:53,390 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 21:10:53,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-11-07 21:10:53,391 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:10:53,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 21:10:53,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 21:10:53,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:10:53,392 INFO L87 Difference]: Start difference. First operand 44082 states and 52810 transitions. Second operand 3 states. [2018-11-07 21:10:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:10:58,587 INFO L93 Difference]: Finished difference Result 110592 states and 133522 transitions. [2018-11-07 21:10:58,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 21:10:58,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 691 [2018-11-07 21:10:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:10:58,756 INFO L225 Difference]: With dead ends: 110592 [2018-11-07 21:10:58,756 INFO L226 Difference]: Without dead ends: 66516 [2018-11-07 21:10:58,798 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1384 GetRequests, 1382 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 21:10:58,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66516 states. [2018-11-07 21:10:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66516 to 65209. [2018-11-07 21:10:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65209 states. [2018-11-07 21:10:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65209 states to 65209 states and 77531 transitions. [2018-11-07 21:10:59,714 INFO L78 Accepts]: Start accepts. Automaton has 65209 states and 77531 transitions. Word has length 691 [2018-11-07 21:10:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:10:59,715 INFO L480 AbstractCegarLoop]: Abstraction has 65209 states and 77531 transitions. [2018-11-07 21:10:59,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 21:10:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 65209 states and 77531 transitions. [2018-11-07 21:10:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2018-11-07 21:10:59,775 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:10:59,776 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:59,776 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:10:59,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:10:59,777 INFO L82 PathProgramCache]: Analyzing trace with hash 650424333, now seen corresponding path program 1 times [2018-11-07 21:10:59,777 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:10:59,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:10:59,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:10:59,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:10:59,778 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:10:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:11:00,303 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-11-07 21:11:00,511 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2018-11-07 21:11:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-11-07 21:11:00,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:11:00,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 21:11:00,737 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:11:00,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 21:11:00,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 21:11:00,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:11:00,739 INFO L87 Difference]: Start difference. First operand 65209 states and 77531 transitions. Second operand 4 states. [2018-11-07 21:11:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:11:05,877 INFO L93 Difference]: Finished difference Result 154352 states and 184071 transitions. [2018-11-07 21:11:05,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 21:11:05,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 733 [2018-11-07 21:11:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:11:06,116 INFO L225 Difference]: With dead ends: 154352 [2018-11-07 21:11:06,116 INFO L226 Difference]: Without dead ends: 90020 [2018-11-07 21:11:06,175 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:11:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90020 states. [2018-11-07 21:11:07,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90020 to 84372. [2018-11-07 21:11:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84372 states. [2018-11-07 21:11:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84372 states to 84372 states and 100449 transitions. [2018-11-07 21:11:07,453 INFO L78 Accepts]: Start accepts. Automaton has 84372 states and 100449 transitions. Word has length 733 [2018-11-07 21:11:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:11:07,454 INFO L480 AbstractCegarLoop]: Abstraction has 84372 states and 100449 transitions. [2018-11-07 21:11:07,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 21:11:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 84372 states and 100449 transitions. [2018-11-07 21:11:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2018-11-07 21:11:07,529 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:11:07,530 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, 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, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:07,530 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:11:07,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:11:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2770182, now seen corresponding path program 1 times [2018-11-07 21:11:07,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:11:07,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:11:07,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:11:07,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:11:07,532 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:11:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:11:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 640 proven. 35 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-11-07 21:11:08,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:11:08,669 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:11:08,669 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 840 with the following transitions: [2018-11-07 21:11:08,670 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [95], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1356], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1861], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:11:08,676 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:11:08,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:11:08,719 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:11:12,606 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:11:12,606 INFO L272 AbstractInterpreter]: Visited 326 different actions 2949 times. Merged at 10 different actions 107 times. Widened at 1 different actions 5 times. Found 27 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 21:11:12,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:11:12,613 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:11:12,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:11:12,613 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:11:12,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:11:12,621 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:11:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:11:12,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:11:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 640 proven. 35 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-11-07 21:11:13,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:11:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 673 proven. 2 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-11-07 21:11:15,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:11:15,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2018-11-07 21:11:15,776 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:11:15,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 21:11:15,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 21:11:15,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-11-07 21:11:15,778 INFO L87 Difference]: Start difference. First operand 84372 states and 100449 transitions. Second operand 10 states. [2018-11-07 21:11:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:11:26,923 INFO L93 Difference]: Finished difference Result 186650 states and 223268 transitions. [2018-11-07 21:11:26,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 21:11:26,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 839 [2018-11-07 21:11:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:11:27,183 INFO L225 Difference]: With dead ends: 186650 [2018-11-07 21:11:27,184 INFO L226 Difference]: Without dead ends: 103155 [2018-11-07 21:11:27,286 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1695 GetRequests, 1679 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2018-11-07 21:11:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103155 states. [2018-11-07 21:11:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103155 to 96618. [2018-11-07 21:11:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96618 states. [2018-11-07 21:11:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96618 states to 96618 states and 114415 transitions. [2018-11-07 21:11:29,268 INFO L78 Accepts]: Start accepts. Automaton has 96618 states and 114415 transitions. Word has length 839 [2018-11-07 21:11:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:11:29,268 INFO L480 AbstractCegarLoop]: Abstraction has 96618 states and 114415 transitions. [2018-11-07 21:11:29,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 21:11:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 96618 states and 114415 transitions. [2018-11-07 21:11:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2018-11-07 21:11:29,346 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:11:29,347 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, 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, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:29,347 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:11:29,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:11:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1897564888, now seen corresponding path program 1 times [2018-11-07 21:11:29,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:11:29,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:11:29,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:11:29,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:11:29,348 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:11:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:11:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 640 proven. 35 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-11-07 21:11:30,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:11:30,683 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:11:30,685 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 851 with the following transitions: [2018-11-07 21:11:30,685 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [153], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1356], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1861], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:11:30,690 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:11:30,691 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:11:30,760 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-11-07 21:11:31,879 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-07 21:11:31,880 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-07 21:11:31,880 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 21:11:31,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:11:31,880 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:11:31,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:11:31,889 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:11:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:11:32,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:11:32,133 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 21:11:32,335 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:11:32,335 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 21:11:32,341 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 21:11:32,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 09:11:32 BoogieIcfgContainer [2018-11-07 21:11:32,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 21:11:32,343 INFO L168 Benchmark]: Toolchain (without parser) took 225399.85 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -340.5 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-11-07 21:11:32,344 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 21:11:32,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1536.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 140.0 MB). Peak memory consumption was 140.0 MB. Max. memory is 7.1 GB. [2018-11-07 21:11:32,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 323.60 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 806.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -988.9 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2018-11-07 21:11:32,346 INFO L168 Benchmark]: Boogie Preprocessor took 247.74 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2018-11-07 21:11:32,347 INFO L168 Benchmark]: RCFGBuilder took 7548.63 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 463.3 MB). Peak memory consumption was 463.3 MB. Max. memory is 7.1 GB. [2018-11-07 21:11:32,348 INFO L168 Benchmark]: TraceAbstraction took 215737.56 ms. Allocated memory was 2.4 GB in the beginning and 3.7 GB in the end (delta: 1.3 GB). Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: 31.1 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-07 21:11:32,353 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 1536.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 140.0 MB). Peak memory consumption was 140.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 323.60 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 806.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -988.9 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 247.74 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7548.63 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 463.3 MB). Peak memory consumption was 463.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215737.56 ms. Allocated memory was 2.4 GB in the beginning and 3.7 GB in the end (delta: 1.3 GB). Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: 31.1 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 119). Cancelled while BasicCegarLoop was analyzing trace of length 851 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 215.6s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 154.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3807 SDtfs, 26855 SDslu, 2845 SDs, 0 SdLazy, 42881 SolverSat, 9715 SolverUnsat, 214 SolverUnknown, 0 SolverNotchecked, 136.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9300 GetRequests, 9161 SyntacticMatches, 14 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96618occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 22.1s AbstIntTime, 11 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.9s AutomataMinimizationTime, 14 MinimizatonAttempts, 23701 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 23.8s InterpolantComputationTime, 10343 NumberOfCodeBlocks, 10343 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 14885 ConstructedInterpolants, 299 QuantifiedInterpolants, 20542366 SizeOfPredicates, 20 NumberOfNonLiveVariables, 6946 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 34 InterpolantComputations, 11 PerfectInterpolantSequences, 15654/16289 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown