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/Problem15_label45_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:09:18,819 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:09:18,822 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:09:18,838 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:09:18,838 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:09:18,839 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:09:18,841 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:09:18,843 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:09:18,844 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:09:18,845 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:09:18,846 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:09:18,846 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:09:18,847 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:09:18,849 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:09:18,851 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:09:18,851 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:09:18,856 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:09:18,857 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:09:18,862 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:09:18,863 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:09:18,868 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:09:18,869 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:09:18,875 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:09:18,875 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:09:18,875 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:09:18,880 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:09:18,881 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:09:18,882 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:09:18,883 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:09:18,884 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:09:18,884 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:09:18,888 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:09:18,888 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:09:18,889 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:09:18,890 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:09:18,890 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:09:18,891 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:09:18,913 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:09:18,913 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:09:18,914 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:09:18,914 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:09:18,914 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:09:18,915 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:09:18,915 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:09:18,915 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:09:18,915 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:09:18,915 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:09:18,916 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:09:18,916 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:09:18,916 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:09:18,917 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:09:18,917 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:09:18,917 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:09:18,917 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:09:18,917 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:09:18,918 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:09:18,918 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:09:18,918 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:09:18,918 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:09:18,918 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:09:18,919 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:09:18,919 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:09:18,919 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:09:18,919 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:09:18,919 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:09:18,920 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:09:18,920 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:09:18,920 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:09:18,920 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:09:18,920 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:09:18,921 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:09:18,921 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:09:18,973 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:09:18,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:09:18,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:09:18,992 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:09:18,993 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:09:18,993 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label45_false-unreach-call.c [2018-11-07 18:09:19,049 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84bf00da8/a5096166dafe46329f25a756031239b4/FLAG79868de18 [2018-11-07 18:09:19,696 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:09:19,697 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label45_false-unreach-call.c [2018-11-07 18:09:19,720 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84bf00da8/a5096166dafe46329f25a756031239b4/FLAG79868de18 [2018-11-07 18:09:19,739 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84bf00da8/a5096166dafe46329f25a756031239b4 [2018-11-07 18:09:19,751 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:09:19,753 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:09:19,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:09:19,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:09:19,759 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:09:19,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:09:19" (1/1) ... [2018-11-07 18:09:19,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@513c6e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:19, skipping insertion in model container [2018-11-07 18:09:19,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:09:19" (1/1) ... [2018-11-07 18:09:19,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:09:19,884 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:09:20,704 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:09:20,709 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:09:21,022 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:09:21,046 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:09:21,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21 WrapperNode [2018-11-07 18:09:21,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:09:21,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:09:21,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:09:21,048 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:09:21,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (1/1) ... [2018-11-07 18:09:21,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (1/1) ... [2018-11-07 18:09:21,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:09:21,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:09:21,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:09:21,277 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:09:21,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (1/1) ... [2018-11-07 18:09:21,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (1/1) ... [2018-11-07 18:09:21,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (1/1) ... [2018-11-07 18:09:21,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (1/1) ... [2018-11-07 18:09:21,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (1/1) ... [2018-11-07 18:09:21,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (1/1) ... [2018-11-07 18:09:21,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (1/1) ... [2018-11-07 18:09:21,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:09:21,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:09:21,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:09:21,443 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:09:21,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:09:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:09:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:09:21,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:09:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 18:09:21,518 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 18:09:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:09:21,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:09:21,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:09:21,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:09:21,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:09:21,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:09:27,132 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:09:27,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:09:27 BoogieIcfgContainer [2018-11-07 18:09:27,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:09:27,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:09:27,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:09:27,138 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:09:27,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:09:19" (1/3) ... [2018-11-07 18:09:27,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3110f1ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:09:27, skipping insertion in model container [2018-11-07 18:09:27,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:09:21" (2/3) ... [2018-11-07 18:09:27,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3110f1ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:09:27, skipping insertion in model container [2018-11-07 18:09:27,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:09:27" (3/3) ... [2018-11-07 18:09:27,142 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label45_false-unreach-call.c [2018-11-07 18:09:27,152 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:09:27,164 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:09:27,180 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:09:27,221 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:09:27,222 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:09:27,222 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:09:27,222 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:09:27,222 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:09:27,222 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:09:27,223 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:09:27,223 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:09:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-11-07 18:09:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-07 18:09:27,264 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:09:27,266 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] [2018-11-07 18:09:27,269 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:09:27,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:27,275 INFO L82 PathProgramCache]: Analyzing trace with hash -114315524, now seen corresponding path program 1 times [2018-11-07 18:09:27,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:09:27,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:27,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:27,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:27,335 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:09:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:27,816 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-11-07 18:09:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:09:27,829 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:09:27,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:09:27,829 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:09:27,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:09:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:09:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:09:27,855 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-11-07 18:09:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:09:34,515 INFO L93 Difference]: Finished difference Result 1501 states and 2761 transitions. [2018-11-07 18:09:34,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:09:34,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-11-07 18:09:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:09:34,542 INFO L225 Difference]: With dead ends: 1501 [2018-11-07 18:09:34,542 INFO L226 Difference]: Without dead ends: 1057 [2018-11-07 18:09:34,555 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:09:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2018-11-07 18:09:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 744. [2018-11-07 18:09:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-11-07 18:09:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1125 transitions. [2018-11-07 18:09:34,679 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1125 transitions. Word has length 36 [2018-11-07 18:09:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:09:34,680 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1125 transitions. [2018-11-07 18:09:34,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:09:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1125 transitions. [2018-11-07 18:09:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-11-07 18:09:34,689 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:09:34,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:09:34,690 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:09:34,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:34,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1201155097, now seen corresponding path program 1 times [2018-11-07 18:09:34,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:09:34,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:34,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:34,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:34,694 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:09:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:09:34,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:09:34,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:09:34,981 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:09:34,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:09:34,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:09:34,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:09:34,984 INFO L87 Difference]: Start difference. First operand 744 states and 1125 transitions. Second operand 4 states. [2018-11-07 18:09:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:09:40,116 INFO L93 Difference]: Finished difference Result 2732 states and 4244 transitions. [2018-11-07 18:09:40,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:09:40,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2018-11-07 18:09:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:09:40,130 INFO L225 Difference]: With dead ends: 2732 [2018-11-07 18:09:40,130 INFO L226 Difference]: Without dead ends: 1994 [2018-11-07 18:09:40,136 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:09:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2018-11-07 18:09:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1682. [2018-11-07 18:09:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1682 states. [2018-11-07 18:09:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2410 transitions. [2018-11-07 18:09:40,206 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2410 transitions. Word has length 106 [2018-11-07 18:09:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:09:40,207 INFO L480 AbstractCegarLoop]: Abstraction has 1682 states and 2410 transitions. [2018-11-07 18:09:40,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:09:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2410 transitions. [2018-11-07 18:09:40,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-11-07 18:09:40,228 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:09:40,229 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:09:40,229 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:09:40,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash 199618376, now seen corresponding path program 1 times [2018-11-07 18:09:40,230 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:09:40,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:40,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:40,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:40,232 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:09:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 61 proven. 87 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 18:09:40,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:09:40,818 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:09:40,819 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 257 with the following transitions: [2018-11-07 18:09:40,821 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [816], [819], [823], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:09:40,872 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:09:40,872 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:09:41,500 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:09:43,401 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:09:43,403 INFO L272 AbstractInterpreter]: Visited 130 different actions 874 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:09:43,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:43,440 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:09:44,473 INFO L227 lantSequenceWeakener]: Weakened 82 states. On average, predicates are now at 78.55% of their original sizes. [2018-11-07 18:09:44,473 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:09:48,642 INFO L415 sIntCurrentIteration]: We unified 255 AI predicates to 255 [2018-11-07 18:09:48,643 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:09:48,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:09:48,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-07 18:09:48,645 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:09:48,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 18:09:48,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 18:09:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:09:48,647 INFO L87 Difference]: Start difference. First operand 1682 states and 2410 transitions. Second operand 20 states. [2018-11-07 18:10:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:10:41,823 INFO L93 Difference]: Finished difference Result 5664 states and 7466 transitions. [2018-11-07 18:10:41,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 18:10:41,823 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 256 [2018-11-07 18:10:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:10:41,843 INFO L225 Difference]: With dead ends: 5664 [2018-11-07 18:10:41,843 INFO L226 Difference]: Without dead ends: 3988 [2018-11-07 18:10:41,852 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 272 GetRequests, 202 SyntacticMatches, 36 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2018-11-07 18:10:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2018-11-07 18:10:41,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 3489. [2018-11-07 18:10:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3489 states. [2018-11-07 18:10:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 4281 transitions. [2018-11-07 18:10:41,946 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 4281 transitions. Word has length 256 [2018-11-07 18:10:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:10:41,947 INFO L480 AbstractCegarLoop]: Abstraction has 3489 states and 4281 transitions. [2018-11-07 18:10:41,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 18:10:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 4281 transitions. [2018-11-07 18:10:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-11-07 18:10:41,955 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:10:41,956 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:10:41,956 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:10:41,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:10:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash 904114606, now seen corresponding path program 1 times [2018-11-07 18:10:41,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:10:41,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:41,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:10:41,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:41,959 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:10:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:10:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:10:43,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:10:43,416 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:10:43,417 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 398 with the following transitions: [2018-11-07 18:10:43,417 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [644], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:10:43,431 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:10:43,431 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:10:43,583 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:10:43,788 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:10:43,788 INFO L272 AbstractInterpreter]: Visited 283 different actions 560 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:10:43,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:10:43,799 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:10:44,436 INFO L227 lantSequenceWeakener]: Weakened 61 states. On average, predicates are now at 80.05% of their original sizes. [2018-11-07 18:10:44,436 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:10:44,848 INFO L415 sIntCurrentIteration]: We unified 396 AI predicates to 396 [2018-11-07 18:10:44,848 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:10:44,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:10:44,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-07 18:10:44,849 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:10:44,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 18:10:44,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 18:10:44,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:10:44,851 INFO L87 Difference]: Start difference. First operand 3489 states and 4281 transitions. Second operand 20 states. [2018-11-07 18:11:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:11:25,038 INFO L93 Difference]: Finished difference Result 6396 states and 8132 transitions. [2018-11-07 18:11:25,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 18:11:25,039 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 397 [2018-11-07 18:11:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:11:25,064 INFO L225 Difference]: With dead ends: 6396 [2018-11-07 18:11:25,064 INFO L226 Difference]: Without dead ends: 4720 [2018-11-07 18:11:25,071 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 413 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2018-11-07 18:11:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4720 states. [2018-11-07 18:11:25,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4720 to 4713. [2018-11-07 18:11:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4713 states. [2018-11-07 18:11:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 5592 transitions. [2018-11-07 18:11:25,217 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 5592 transitions. Word has length 397 [2018-11-07 18:11:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:11:25,220 INFO L480 AbstractCegarLoop]: Abstraction has 4713 states and 5592 transitions. [2018-11-07 18:11:25,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 18:11:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 5592 transitions. [2018-11-07 18:11:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2018-11-07 18:11:25,237 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:11:25,238 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:11:25,239 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:11:25,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:11:25,239 INFO L82 PathProgramCache]: Analyzing trace with hash -883454299, now seen corresponding path program 1 times [2018-11-07 18:11:25,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:11:25,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:11:25,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:11:25,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:11:25,241 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:11:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:11:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 260 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-11-07 18:11:26,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:11:26,158 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:11:26,159 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 494 with the following transitions: [2018-11-07 18:11:26,160 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [644], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:11:26,168 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:11:26,169 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:11:26,238 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:11:27,617 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:11:27,617 INFO L272 AbstractInterpreter]: Visited 285 different actions 1132 times. Merged at 7 different actions 28 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:11:27,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:11:27,646 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:11:27,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:11:27,646 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:11:27,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:11:27,656 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:11:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:11:27,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:11:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 234 proven. 41 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-11-07 18:11:29,007 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:11:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 97 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:11:30,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:11:30,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 17 [2018-11-07 18:11:30,975 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:11:30,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 18:11:30,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 18:11:30,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-11-07 18:11:30,977 INFO L87 Difference]: Start difference. First operand 4713 states and 5592 transitions. Second operand 12 states. [2018-11-07 18:12:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:12:03,464 INFO L93 Difference]: Finished difference Result 19441 states and 26709 transitions. [2018-11-07 18:12:03,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-11-07 18:12:03,464 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 493 [2018-11-07 18:12:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:12:03,557 INFO L225 Difference]: With dead ends: 19441 [2018-11-07 18:12:03,557 INFO L226 Difference]: Without dead ends: 13131 [2018-11-07 18:12:03,617 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1043 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2937 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1698, Invalid=7044, Unknown=0, NotChecked=0, Total=8742 [2018-11-07 18:12:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13131 states. [2018-11-07 18:12:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13131 to 11750. [2018-11-07 18:12:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11750 states. [2018-11-07 18:12:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11750 states to 11750 states and 14861 transitions. [2018-11-07 18:12:04,003 INFO L78 Accepts]: Start accepts. Automaton has 11750 states and 14861 transitions. Word has length 493 [2018-11-07 18:12:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:12:04,004 INFO L480 AbstractCegarLoop]: Abstraction has 11750 states and 14861 transitions. [2018-11-07 18:12:04,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 18:12:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 11750 states and 14861 transitions. [2018-11-07 18:12:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-11-07 18:12:04,034 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:12:04,035 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:12:04,035 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:12:04,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:04,036 INFO L82 PathProgramCache]: Analyzing trace with hash 692230944, now seen corresponding path program 1 times [2018-11-07 18:12:04,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:12:04,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:04,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:04,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:04,037 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:12:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 93 proven. 174 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 18:12:05,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:12:05,319 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:12:05,320 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 518 with the following transitions: [2018-11-07 18:12:05,320 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [566], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [816], [819], [823], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1562], [1566], [1570], [1581], [1585], [1589], [1593], [1597], [1601], [1612], [1616], [1620], [1623], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:12:05,329 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:12:05,329 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:12:05,736 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:12:06,575 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:12:06,575 INFO L272 AbstractInterpreter]: Visited 297 different actions 888 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:12:06,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:06,614 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:12:06,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:12:06,614 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:12:06,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:06,630 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:12:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:06,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:12:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 280 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 18:12:07,193 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:12:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 280 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 18:12:07,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:12:07,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2018-11-07 18:12:07,870 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:12:07,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 18:12:07,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 18:12:07,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:12:07,872 INFO L87 Difference]: Start difference. First operand 11750 states and 14861 transitions. Second operand 11 states. [2018-11-07 18:12:12,780 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-11-07 18:12:28,210 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-07 18:12:30,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:12:30,561 INFO L93 Difference]: Finished difference Result 38928 states and 57197 transitions. [2018-11-07 18:12:30,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-11-07 18:12:30,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 517 [2018-11-07 18:12:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:12:30,791 INFO L225 Difference]: With dead ends: 38928 [2018-11-07 18:12:30,792 INFO L226 Difference]: Without dead ends: 29308 [2018-11-07 18:12:30,922 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1164 GetRequests, 1086 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1151, Invalid=4701, Unknown=0, NotChecked=0, Total=5852 [2018-11-07 18:12:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29308 states. [2018-11-07 18:12:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29308 to 27645. [2018-11-07 18:12:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27645 states. [2018-11-07 18:12:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27645 states to 27645 states and 34185 transitions. [2018-11-07 18:12:31,800 INFO L78 Accepts]: Start accepts. Automaton has 27645 states and 34185 transitions. Word has length 517 [2018-11-07 18:12:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:12:31,801 INFO L480 AbstractCegarLoop]: Abstraction has 27645 states and 34185 transitions. [2018-11-07 18:12:31,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 18:12:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 27645 states and 34185 transitions. [2018-11-07 18:12:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2018-11-07 18:12:31,831 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:12:31,831 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:12:31,832 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:12:31,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:31,832 INFO L82 PathProgramCache]: Analyzing trace with hash -421652104, now seen corresponding path program 1 times [2018-11-07 18:12:31,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:12:31,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:31,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:31,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:31,834 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:12:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 260 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:12:32,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:12:32,609 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:12:32,609 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 522 with the following transitions: [2018-11-07 18:12:32,610 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [644], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1562], [1566], [1570], [1581], [1585], [1589], [1593], [1597], [1601], [1612], [1616], [1620], [1623], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:12:32,616 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:12:32,616 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:12:32,887 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:12:33,628 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:12:33,628 INFO L272 AbstractInterpreter]: Visited 297 different actions 1173 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:12:33,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:33,635 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:12:33,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:12:33,635 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:12:33,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:33,645 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:12:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:33,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:12:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 260 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:12:34,259 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:12:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 260 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:12:34,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:12:34,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 18:12:34,522 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:12:34,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:12:34,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:12:34,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:12:34,524 INFO L87 Difference]: Start difference. First operand 27645 states and 34185 transitions. Second operand 9 states. [2018-11-07 18:12:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:12:41,848 INFO L93 Difference]: Finished difference Result 59889 states and 90041 transitions. [2018-11-07 18:12:41,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-07 18:12:41,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 521 [2018-11-07 18:12:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:12:42,112 INFO L225 Difference]: With dead ends: 59889 [2018-11-07 18:12:42,112 INFO L226 Difference]: Without dead ends: 34373 [2018-11-07 18:12:42,347 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1046 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:12:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34373 states. [2018-11-07 18:12:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34373 to 33196. [2018-11-07 18:12:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33196 states. [2018-11-07 18:12:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33196 states to 33196 states and 45314 transitions. [2018-11-07 18:12:43,789 INFO L78 Accepts]: Start accepts. Automaton has 33196 states and 45314 transitions. Word has length 521 [2018-11-07 18:12:43,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:12:43,789 INFO L480 AbstractCegarLoop]: Abstraction has 33196 states and 45314 transitions. [2018-11-07 18:12:43,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:12:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 33196 states and 45314 transitions. [2018-11-07 18:12:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2018-11-07 18:12:43,812 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:12:43,813 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:12:43,813 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:12:43,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1239854732, now seen corresponding path program 1 times [2018-11-07 18:12:43,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:12:43,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:43,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:43,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:43,815 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:12:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2018-11-07 18:12:44,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:12:44,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:12:44,316 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:12:44,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:12:44,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:12:44,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:12:44,317 INFO L87 Difference]: Start difference. First operand 33196 states and 45314 transitions. Second operand 3 states. [2018-11-07 18:12:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:12:47,494 INFO L93 Difference]: Finished difference Result 68861 states and 102049 transitions. [2018-11-07 18:12:47,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:12:47,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 527 [2018-11-07 18:12:47,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:12:47,715 INFO L225 Difference]: With dead ends: 68861 [2018-11-07 18:12:47,716 INFO L226 Difference]: Without dead ends: 37795 [2018-11-07 18:12:47,943 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:12:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37795 states. [2018-11-07 18:12:48,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37795 to 37789. [2018-11-07 18:12:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37789 states. [2018-11-07 18:12:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37789 states to 37789 states and 53831 transitions. [2018-11-07 18:12:49,625 INFO L78 Accepts]: Start accepts. Automaton has 37789 states and 53831 transitions. Word has length 527 [2018-11-07 18:12:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:12:49,626 INFO L480 AbstractCegarLoop]: Abstraction has 37789 states and 53831 transitions. [2018-11-07 18:12:49,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:12:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 37789 states and 53831 transitions. [2018-11-07 18:12:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2018-11-07 18:12:49,731 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:12:49,731 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:12:49,732 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:12:49,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:49,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1637956670, now seen corresponding path program 1 times [2018-11-07 18:12:49,733 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:12:49,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:49,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:49,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:49,734 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:12:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 453 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:12:50,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:12:50,890 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:12:50,890 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 689 with the following transitions: [2018-11-07 18:12:50,891 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1459], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1562], [1566], [1570], [1581], [1585], [1589], [1593], [1597], [1601], [1612], [1616], [1620], [1623], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:12:50,895 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:12:50,895 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:12:51,094 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:12:52,599 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:12:52,599 INFO L272 AbstractInterpreter]: Visited 297 different actions 1770 times. Merged at 8 different actions 45 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:12:52,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:52,605 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:12:52,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:12:52,605 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:12:52,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:52,615 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:12:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:52,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-11-07 18:12:53,374 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 18:12:53,576 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:12:53,577 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:12:53,585 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:12:53,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:12:53 BoogieIcfgContainer [2018-11-07 18:12:53,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:12:53,586 INFO L168 Benchmark]: Toolchain (without parser) took 213834.30 ms. Allocated memory was 1.5 GB in the beginning and 5.2 GB in the end (delta: 3.7 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-11-07 18:12:53,587 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:12:53,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1292.67 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-11-07 18:12:53,589 INFO L168 Benchmark]: Boogie Procedure Inliner took 229.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 770.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -914.2 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:12:53,594 INFO L168 Benchmark]: Boogie Preprocessor took 164.79 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2018-11-07 18:12:53,595 INFO L168 Benchmark]: RCFGBuilder took 5690.89 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 284.2 MB). Peak memory consumption was 284.2 MB. Max. memory is 7.1 GB. [2018-11-07 18:12:53,596 INFO L168 Benchmark]: TraceAbstraction took 206451.21 ms. Allocated memory was 2.3 GB in the beginning and 5.2 GB in the end (delta: 2.9 GB). Free memory was 1.9 GB in the beginning and 3.4 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-07 18:12:53,605 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 1292.67 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 229.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 770.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -914.2 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 164.79 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5690.89 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 284.2 MB). Peak memory consumption was 284.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206451.21 ms. Allocated memory was 2.3 GB in the beginning and 5.2 GB in the end (delta: 2.9 GB). Free memory was 1.9 GB in the beginning and 3.4 GB in the end (delta: -1.5 GB). 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: 94]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 94). Cancelled while BasicCegarLoop was analyzing trace of length 689 with TraceHistMax 4,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, 438 locations, 1 error locations. TIMEOUT Result, 206.3s OverallTime, 9 OverallIterations, 4 TraceHistogramMax, 172.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2977 SDtfs, 26942 SDslu, 4288 SDs, 0 SdLazy, 58007 SolverSat, 7633 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 92.6s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 4066 GetRequests, 3765 SyntacticMatches, 42 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5840 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37789occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 8.5s AbstIntTime, 6 AbstIntIterations, 2 AbstIntStrong, 0.9977664428765888 AbsIntWeakeningRatio, 0.08141321044546851 AbsIntAvgWeakeningVarsNumRemoved, 13.41321044546851 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.7s AutomataMinimizationTime, 8 MinimizatonAttempts, 5358 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 4384 NumberOfCodeBlocks, 4384 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 5901 ConstructedInterpolants, 0 QuantifiedInterpolants, 11560429 SizeOfPredicates, 15 NumberOfNonLiveVariables, 2191 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 3362/3931 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown