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/Problem16_label59_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:58:08,885 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:58:08,888 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:58:08,904 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:58:08,904 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:58:08,905 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:58:08,906 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:58:08,908 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:58:08,909 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:58:08,910 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:58:08,911 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:58:08,912 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:58:08,912 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:58:08,913 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:58:08,914 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:58:08,915 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:58:08,916 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:58:08,918 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:58:08,920 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:58:08,921 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:58:08,922 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:58:08,924 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:58:08,927 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:58:08,927 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:58:08,927 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:58:08,928 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:58:08,929 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:58:08,930 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:58:08,931 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:58:08,932 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:58:08,932 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:58:08,933 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:58:08,933 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:58:08,934 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:58:08,935 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:58:08,935 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:58:08,936 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 20:58:08,953 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:58:08,953 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:58:08,958 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:58:08,958 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:58:08,958 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:58:08,958 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:58:08,958 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:58:08,962 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:58:08,962 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:58:08,962 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:58:08,962 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:58:08,962 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:58:08,963 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:58:08,963 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:58:08,964 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:58:08,964 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:58:08,964 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:58:08,964 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:58:08,964 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:58:08,965 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:58:08,965 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:58:08,965 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:58:08,965 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:58:08,965 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:58:08,966 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:58:08,966 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:58:08,966 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:58:08,966 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:58:08,966 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:58:08,968 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:58:08,968 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:58:08,969 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:58:08,969 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:58:08,969 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:58:08,969 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:58:09,038 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:58:09,058 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:58:09,062 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:58:09,063 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:58:09,064 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:58:09,065 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label59_true-unreach-call.c [2018-11-07 20:58:09,135 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66d2266dd/728e1837e4e842648e41584a93921d20/FLAG6e732fbf6 [2018-11-07 20:58:09,843 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:58:09,844 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label59_true-unreach-call.c [2018-11-07 20:58:09,871 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66d2266dd/728e1837e4e842648e41584a93921d20/FLAG6e732fbf6 [2018-11-07 20:58:09,897 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66d2266dd/728e1837e4e842648e41584a93921d20 [2018-11-07 20:58:09,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:58:09,913 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:58:09,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:58:09,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:58:09,921 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:58:09,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:58:09" (1/1) ... [2018-11-07 20:58:09,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9260898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:09, skipping insertion in model container [2018-11-07 20:58:09,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:58:09" (1/1) ... [2018-11-07 20:58:09,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:58:10,028 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:58:10,816 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:58:10,825 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:58:11,105 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:58:11,129 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:58:11,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11 WrapperNode [2018-11-07 20:58:11,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:58:11,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:58:11,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:58:11,132 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:58:11,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (1/1) ... [2018-11-07 20:58:11,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (1/1) ... [2018-11-07 20:58:11,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:58:11,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:58:11,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:58:11,381 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:58:11,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (1/1) ... [2018-11-07 20:58:11,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (1/1) ... [2018-11-07 20:58:11,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (1/1) ... [2018-11-07 20:58:11,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (1/1) ... [2018-11-07 20:58:11,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (1/1) ... [2018-11-07 20:58:11,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (1/1) ... [2018-11-07 20:58:11,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (1/1) ... [2018-11-07 20:58:11,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:58:11,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:58:11,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:58:11,522 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:58:11,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (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 20:58:11,595 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:58:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:58:11,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:58:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 20:58:11,596 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 20:58:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:58:11,597 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:58:11,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:58:11,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:58:11,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:58:11,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:58:18,079 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:58:18,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:58:18 BoogieIcfgContainer [2018-11-07 20:58:18,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:58:18,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:58:18,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:58:18,086 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:58:18,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:58:09" (1/3) ... [2018-11-07 20:58:18,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fec3dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:58:18, skipping insertion in model container [2018-11-07 20:58:18,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:11" (2/3) ... [2018-11-07 20:58:18,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fec3dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:58:18, skipping insertion in model container [2018-11-07 20:58:18,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:58:18" (3/3) ... [2018-11-07 20:58:18,090 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label59_true-unreach-call.c [2018-11-07 20:58:18,100 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:58:18,111 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:58:18,129 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:58:18,171 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:58:18,171 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:58:18,172 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:58:18,172 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:58:18,172 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:58:18,172 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:58:18,172 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:58:18,173 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:58:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 20:58:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-07 20:58:18,214 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:58:18,215 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:58:18,218 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:58:18,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:18,224 INFO L82 PathProgramCache]: Analyzing trace with hash 371317715, now seen corresponding path program 1 times [2018-11-07 20:58:18,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:58:18,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:18,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:18,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:18,278 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:58:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:18,710 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-11-07 20:58:18,778 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 20:58:18,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:58:18,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:58:18,787 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:58:18,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:58:18,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:58:18,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:58:18,830 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-11-07 20:58:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:58:23,818 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-11-07 20:58:23,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:58:23,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2018-11-07 20:58:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:58:23,853 INFO L225 Difference]: With dead ends: 1513 [2018-11-07 20:58:23,853 INFO L226 Difference]: Without dead ends: 1097 [2018-11-07 20:58:23,865 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:58:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-11-07 20:58:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 744. [2018-11-07 20:58:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-11-07 20:58:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1357 transitions. [2018-11-07 20:58:24,056 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1357 transitions. Word has length 51 [2018-11-07 20:58:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:58:24,057 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1357 transitions. [2018-11-07 20:58:24,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:58:24,057 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1357 transitions. [2018-11-07 20:58:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-07 20:58:24,069 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:58:24,069 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:24,069 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:58:24,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:24,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1405398300, now seen corresponding path program 1 times [2018-11-07 20:58:24,076 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:58:24,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:24,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:24,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:24,078 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:58:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:58:24,353 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:58:24,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 20:58:24,353 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:58:24,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 20:58:24,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 20:58:24,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 20:58:24,356 INFO L87 Difference]: Start difference. First operand 744 states and 1357 transitions. Second operand 5 states. [2018-11-07 20:58:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:58:28,661 INFO L93 Difference]: Finished difference Result 2196 states and 4092 transitions. [2018-11-07 20:58:28,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:58:28,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2018-11-07 20:58:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:58:28,678 INFO L225 Difference]: With dead ends: 2196 [2018-11-07 20:58:28,679 INFO L226 Difference]: Without dead ends: 1458 [2018-11-07 20:58:28,683 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:58:28,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2018-11-07 20:58:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1438. [2018-11-07 20:58:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2018-11-07 20:58:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2551 transitions. [2018-11-07 20:58:28,777 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2551 transitions. Word has length 121 [2018-11-07 20:58:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:58:28,778 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 2551 transitions. [2018-11-07 20:58:28,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 20:58:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2551 transitions. [2018-11-07 20:58:28,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-11-07 20:58:28,789 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:58:28,789 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:28,789 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:58:28,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:28,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1847072879, now seen corresponding path program 1 times [2018-11-07 20:58:28,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:58:28,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:28,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:28,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:28,792 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:58:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:58:29,080 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:58:29,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:58:29,080 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:58:29,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:58:29,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:58:29,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:58:29,082 INFO L87 Difference]: Start difference. First operand 1438 states and 2551 transitions. Second operand 6 states. [2018-11-07 20:58:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:58:34,182 INFO L93 Difference]: Finished difference Result 4237 states and 7540 transitions. [2018-11-07 20:58:34,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:58:34,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2018-11-07 20:58:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:58:34,202 INFO L225 Difference]: With dead ends: 4237 [2018-11-07 20:58:34,203 INFO L226 Difference]: Without dead ends: 2805 [2018-11-07 20:58:34,212 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:58:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2018-11-07 20:58:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2785. [2018-11-07 20:58:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2785 states. [2018-11-07 20:58:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4352 transitions. [2018-11-07 20:58:34,294 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4352 transitions. Word has length 124 [2018-11-07 20:58:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:58:34,294 INFO L480 AbstractCegarLoop]: Abstraction has 2785 states and 4352 transitions. [2018-11-07 20:58:34,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:58:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4352 transitions. [2018-11-07 20:58:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-07 20:58:34,297 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:58:34,297 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:34,297 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:58:34,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:34,298 INFO L82 PathProgramCache]: Analyzing trace with hash -674317012, now seen corresponding path program 1 times [2018-11-07 20:58:34,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:58:34,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:34,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:34,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:34,299 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:58:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:58:34,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:58:34,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:58:34,498 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:58:34,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:58:34,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:58:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:58:34,500 INFO L87 Difference]: Start difference. First operand 2785 states and 4352 transitions. Second operand 6 states. [2018-11-07 20:58:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:58:38,350 INFO L93 Difference]: Finished difference Result 6952 states and 11048 transitions. [2018-11-07 20:58:38,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:58:38,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-11-07 20:58:38,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:58:38,377 INFO L225 Difference]: With dead ends: 6952 [2018-11-07 20:58:38,377 INFO L226 Difference]: Without dead ends: 4173 [2018-11-07 20:58:38,393 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:58:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2018-11-07 20:58:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 4153. [2018-11-07 20:58:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4153 states. [2018-11-07 20:58:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 5896 transitions. [2018-11-07 20:58:38,505 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 5896 transitions. Word has length 125 [2018-11-07 20:58:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:58:38,505 INFO L480 AbstractCegarLoop]: Abstraction has 4153 states and 5896 transitions. [2018-11-07 20:58:38,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:58:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 5896 transitions. [2018-11-07 20:58:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-11-07 20:58:38,508 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:58:38,508 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:38,508 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:58:38,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash -710224295, now seen corresponding path program 1 times [2018-11-07 20:58:38,509 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:58:38,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:38,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:38,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:38,510 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:58:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:38,733 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:58:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:58:38,863 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:58:38,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:58:38,863 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:58:38,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:58:38,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:58:38,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:58:38,864 INFO L87 Difference]: Start difference. First operand 4153 states and 5896 transitions. Second operand 6 states. [2018-11-07 20:58:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:58:43,021 INFO L93 Difference]: Finished difference Result 11374 states and 16767 transitions. [2018-11-07 20:58:43,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:58:43,022 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2018-11-07 20:58:43,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:58:43,063 INFO L225 Difference]: With dead ends: 11374 [2018-11-07 20:58:43,064 INFO L226 Difference]: Without dead ends: 7227 [2018-11-07 20:58:43,095 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:58:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states. [2018-11-07 20:58:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7227 to 7152. [2018-11-07 20:58:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7152 states. [2018-11-07 20:58:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 9826 transitions. [2018-11-07 20:58:43,291 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 9826 transitions. Word has length 128 [2018-11-07 20:58:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:58:43,292 INFO L480 AbstractCegarLoop]: Abstraction has 7152 states and 9826 transitions. [2018-11-07 20:58:43,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:58:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 9826 transitions. [2018-11-07 20:58:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-07 20:58:43,295 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:58:43,295 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:43,295 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:58:43,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:43,296 INFO L82 PathProgramCache]: Analyzing trace with hash -727624727, now seen corresponding path program 1 times [2018-11-07 20:58:43,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:58:43,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:43,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:43,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:43,297 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:58:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:43,571 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:58:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:58:43,662 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:58:43,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:58:43,662 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:58:43,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:58:43,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:58:43,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:58:43,664 INFO L87 Difference]: Start difference. First operand 7152 states and 9826 transitions. Second operand 6 states. [2018-11-07 20:58:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:58:47,142 INFO L93 Difference]: Finished difference Result 17771 states and 25546 transitions. [2018-11-07 20:58:47,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:58:47,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-11-07 20:58:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:58:47,200 INFO L225 Difference]: With dead ends: 17771 [2018-11-07 20:58:47,200 INFO L226 Difference]: Without dead ends: 10625 [2018-11-07 20:58:47,226 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:58:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10625 states. [2018-11-07 20:58:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10625 to 10585. [2018-11-07 20:58:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10585 states. [2018-11-07 20:58:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 13819 transitions. [2018-11-07 20:58:47,494 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 13819 transitions. Word has length 136 [2018-11-07 20:58:47,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:58:47,495 INFO L480 AbstractCegarLoop]: Abstraction has 10585 states and 13819 transitions. [2018-11-07 20:58:47,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:58:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 13819 transitions. [2018-11-07 20:58:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-07 20:58:47,497 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:58:47,498 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:47,498 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:58:47,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:47,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2054227824, now seen corresponding path program 1 times [2018-11-07 20:58:47,499 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:58:47,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:47,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:47,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:47,500 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:58:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:47,908 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 20:58:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:58:48,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:58:48,050 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:58:48,051 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 144 with the following transitions: [2018-11-07 20:58:48,059 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:58:48,103 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:58:48,104 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:58:48,876 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:58:49,460 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:58:49,462 INFO L272 AbstractInterpreter]: Visited 100 different actions 286 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:58:49,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:49,509 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:58:49,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:58:49,509 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 20:58:49,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:49,523 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:58:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:49,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:58:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:58:49,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:58:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:58:50,127 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:58:50,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2018-11-07 20:58:50,128 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:58:50,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:58:50,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:58:50,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:58:50,130 INFO L87 Difference]: Start difference. First operand 10585 states and 13819 transitions. Second operand 3 states. [2018-11-07 20:58:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:58:54,103 INFO L93 Difference]: Finished difference Result 21164 states and 27640 transitions. [2018-11-07 20:58:54,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:58:54,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2018-11-07 20:58:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:58:54,142 INFO L225 Difference]: With dead ends: 21164 [2018-11-07 20:58:54,142 INFO L226 Difference]: Without dead ends: 7903 [2018-11-07 20:58:54,194 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:58:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7903 states. [2018-11-07 20:58:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7903 to 7903. [2018-11-07 20:58:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7903 states. [2018-11-07 20:58:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7903 states to 7903 states and 8996 transitions. [2018-11-07 20:58:54,390 INFO L78 Accepts]: Start accepts. Automaton has 7903 states and 8996 transitions. Word has length 143 [2018-11-07 20:58:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:58:54,391 INFO L480 AbstractCegarLoop]: Abstraction has 7903 states and 8996 transitions. [2018-11-07 20:58:54,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:58:54,391 INFO L276 IsEmpty]: Start isEmpty. Operand 7903 states and 8996 transitions. [2018-11-07 20:58:54,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-11-07 20:58:54,395 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:58:54,395 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:54,396 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:58:54,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:54,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1721939931, now seen corresponding path program 1 times [2018-11-07 20:58:54,397 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:58:54,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:54,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:54,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:54,398 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:58:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:58:54,658 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:58:54,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:58:54,658 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:58:54,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:58:54,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:58:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:58:54,659 INFO L87 Difference]: Start difference. First operand 7903 states and 8996 transitions. Second operand 4 states. [2018-11-07 20:58:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:58:57,062 INFO L93 Difference]: Finished difference Result 23776 states and 27470 transitions. [2018-11-07 20:58:57,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:58:57,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 214 [2018-11-07 20:58:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:58:57,115 INFO L225 Difference]: With dead ends: 23776 [2018-11-07 20:58:57,116 INFO L226 Difference]: Without dead ends: 15879 [2018-11-07 20:58:57,144 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:58:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15879 states. [2018-11-07 20:58:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15879 to 15877. [2018-11-07 20:58:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15877 states. [2018-11-07 20:58:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15877 states to 15877 states and 17767 transitions. [2018-11-07 20:58:57,661 INFO L78 Accepts]: Start accepts. Automaton has 15877 states and 17767 transitions. Word has length 214 [2018-11-07 20:58:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:58:57,662 INFO L480 AbstractCegarLoop]: Abstraction has 15877 states and 17767 transitions. [2018-11-07 20:58:57,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:58:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 15877 states and 17767 transitions. [2018-11-07 20:58:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2018-11-07 20:58:57,729 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:58:57,730 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-07 20:58:57,730 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:58:57,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:57,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1257154816, now seen corresponding path program 1 times [2018-11-07 20:58:57,731 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:58:57,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:57,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:57,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:57,732 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:58:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 300 proven. 223 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-07 20:58:58,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:58:58,848 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:58:58,848 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 675 with the following transitions: [2018-11-07 20:58:58,849 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1445], [1449], [1453], [1456], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:58:58,867 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:58:58,867 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:58:59,754 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:58:59,755 INFO L272 AbstractInterpreter]: Visited 273 different actions 273 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 20:58:59,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:59,795 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:59:02,300 INFO L227 lantSequenceWeakener]: Weakened 640 states. On average, predicates are now at 77.54% of their original sizes. [2018-11-07 20:59:02,301 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:59:08,305 INFO L415 sIntCurrentIteration]: We unified 673 AI predicates to 673 [2018-11-07 20:59:08,305 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:59:08,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:59:08,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-11-07 20:59:08,307 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:59:08,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 20:59:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 20:59:08,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-11-07 20:59:08,309 INFO L87 Difference]: Start difference. First operand 15877 states and 17767 transitions. Second operand 13 states. [2018-11-07 20:59:14,710 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:59:36,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:59:36,233 INFO L93 Difference]: Finished difference Result 32091 states and 35920 transitions. [2018-11-07 20:59:36,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 20:59:36,233 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 674 [2018-11-07 20:59:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:59:36,295 INFO L225 Difference]: With dead ends: 32091 [2018-11-07 20:59:36,296 INFO L226 Difference]: Without dead ends: 16220 [2018-11-07 20:59:36,330 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 680 GetRequests, 460 SyntacticMatches, 202 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:59:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16220 states. [2018-11-07 20:59:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16220 to 16215. [2018-11-07 20:59:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16215 states. [2018-11-07 20:59:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16215 states to 16215 states and 18109 transitions. [2018-11-07 20:59:36,603 INFO L78 Accepts]: Start accepts. Automaton has 16215 states and 18109 transitions. Word has length 674 [2018-11-07 20:59:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:59:36,604 INFO L480 AbstractCegarLoop]: Abstraction has 16215 states and 18109 transitions. [2018-11-07 20:59:36,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 20:59:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 16215 states and 18109 transitions. [2018-11-07 20:59:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2018-11-07 20:59:36,678 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:59:36,679 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:59:36,679 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:59:36,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:59:36,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1767722917, now seen corresponding path program 1 times [2018-11-07 20:59:36,680 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:59:36,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:59:36,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:59:36,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:59:36,681 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:59:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:59:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 473 proven. 223 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2018-11-07 20:59:37,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:59:37,815 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:59:37,815 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 915 with the following transitions: [2018-11-07 20:59:37,816 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1445], [1449], [1453], [1456], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:59:37,823 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:59:37,823 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:59:38,371 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:59:38,371 INFO L272 AbstractInterpreter]: Visited 277 different actions 550 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:59:38,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:59:38,375 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:59:39,981 INFO L227 lantSequenceWeakener]: Weakened 316 states. On average, predicates are now at 77.94% of their original sizes. [2018-11-07 20:59:39,981 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:59:41,037 INFO L415 sIntCurrentIteration]: We unified 913 AI predicates to 913 [2018-11-07 20:59:41,037 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:59:41,038 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:59:41,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [6] total 27 [2018-11-07 20:59:41,038 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:59:41,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-07 20:59:41,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-07 20:59:41,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2018-11-07 20:59:41,040 INFO L87 Difference]: Start difference. First operand 16215 states and 18109 transitions. Second operand 23 states. [2018-11-07 20:59:56,814 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:00:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:00:12,424 INFO L93 Difference]: Finished difference Result 32723 states and 36564 transitions. [2018-11-07 21:00:12,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-07 21:00:12,425 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 914 [2018-11-07 21:00:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:00:12,475 INFO L225 Difference]: With dead ends: 32723 [2018-11-07 21:00:12,475 INFO L226 Difference]: Without dead ends: 16852 [2018-11-07 21:00:12,509 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 928 GetRequests, 853 SyntacticMatches, 39 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2018-11-07 21:00:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16852 states. [2018-11-07 21:00:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16852 to 16555. [2018-11-07 21:00:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16555 states. [2018-11-07 21:00:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16555 states to 16555 states and 18452 transitions. [2018-11-07 21:00:12,764 INFO L78 Accepts]: Start accepts. Automaton has 16555 states and 18452 transitions. Word has length 914 [2018-11-07 21:00:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:00:12,765 INFO L480 AbstractCegarLoop]: Abstraction has 16555 states and 18452 transitions. [2018-11-07 21:00:12,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-07 21:00:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 16555 states and 18452 transitions. [2018-11-07 21:00:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2018-11-07 21:00:12,849 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:00:12,850 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:00:12,850 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:00:12,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:00:12,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1825560117, now seen corresponding path program 1 times [2018-11-07 21:00:12,851 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:00:12,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:00:12,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:00:12,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:00:12,852 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:00:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:00:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 473 proven. 223 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2018-11-07 21:00:13,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:00:13,789 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:00:13,789 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 923 with the following transitions: [2018-11-07 21:00:13,789 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1445], [1449], [1453], [1456], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 21:00:13,794 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:00:13,795 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:00:16,697 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 21:00:16,697 INFO L272 AbstractInterpreter]: Visited 277 different actions 2716 times. Merged at 5 different actions 45 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 21:00:16,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:00:16,704 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 21:00:18,431 INFO L227 lantSequenceWeakener]: Weakened 209 states. On average, predicates are now at 78.17% of their original sizes. [2018-11-07 21:00:18,432 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 21:00:18,897 INFO L415 sIntCurrentIteration]: We unified 921 AI predicates to 921 [2018-11-07 21:00:18,897 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 21:00:18,897 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 21:00:18,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [6] total 29 [2018-11-07 21:00:18,898 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:00:18,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-07 21:00:18,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-07 21:00:18,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2018-11-07 21:00:18,900 INFO L87 Difference]: Start difference. First operand 16555 states and 18452 transitions. Second operand 25 states. [2018-11-07 21:00:31,370 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:00:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:00:40,676 INFO L93 Difference]: Finished difference Result 33071 states and 36942 transitions. [2018-11-07 21:00:40,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-07 21:00:40,677 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 922 [2018-11-07 21:00:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:00:40,720 INFO L225 Difference]: With dead ends: 33071 [2018-11-07 21:00:40,720 INFO L226 Difference]: Without dead ends: 17200 [2018-11-07 21:00:40,756 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 932 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2018-11-07 21:00:40,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17200 states. [2018-11-07 21:00:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17200 to 17192. [2018-11-07 21:00:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17192 states. [2018-11-07 21:00:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17192 states to 17192 states and 19113 transitions. [2018-11-07 21:00:41,027 INFO L78 Accepts]: Start accepts. Automaton has 17192 states and 19113 transitions. Word has length 922 [2018-11-07 21:00:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:00:41,028 INFO L480 AbstractCegarLoop]: Abstraction has 17192 states and 19113 transitions. [2018-11-07 21:00:41,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-07 21:00:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 17192 states and 19113 transitions. [2018-11-07 21:00:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2018-11-07 21:00:41,084 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:00:41,085 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:00:41,086 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:00:41,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:00:41,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2107911905, now seen corresponding path program 1 times [2018-11-07 21:00:41,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:00:41,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:00:41,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:00:41,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:00:41,088 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:00:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:00:42,090 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 21:00:42,307 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-07 21:00:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2069 backedges. 528 proven. 734 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2018-11-07 21:00:44,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:00:44,069 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:00:44,069 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1024 with the following transitions: [2018-11-07 21:00:44,070 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1445], [1449], [1453], [1456], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 21:00:44,075 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:00:44,075 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:00:44,166 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:00:46,832 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:00:46,832 INFO L272 AbstractInterpreter]: Visited 279 different actions 3040 times. Merged at 8 different actions 86 times. Widened at 1 different actions 6 times. Found 17 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 21:00:46,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:00:46,840 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:00:46,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:00:46,840 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:00:46,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:00:46,852 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:00:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:00:47,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:00:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2069 backedges. 1540 proven. 2 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2018-11-07 21:00:47,937 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:00:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2069 backedges. 631 proven. 223 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2018-11-07 21:00:48,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:00:48,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 17 [2018-11-07 21:00:48,573 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:00:48,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 21:00:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 21:00:48,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2018-11-07 21:00:48,575 INFO L87 Difference]: Start difference. First operand 17192 states and 19113 transitions. Second operand 15 states. [2018-11-07 21:01:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:01:00,124 INFO L93 Difference]: Finished difference Result 41690 states and 46731 transitions. [2018-11-07 21:01:00,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-07 21:01:00,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 1023 [2018-11-07 21:01:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:01:00,190 INFO L225 Difference]: With dead ends: 41690 [2018-11-07 21:01:00,191 INFO L226 Difference]: Without dead ends: 25479 [2018-11-07 21:01:00,248 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2137 GetRequests, 2078 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=680, Invalid=2742, Unknown=0, NotChecked=0, Total=3422 [2018-11-07 21:01:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25479 states. [2018-11-07 21:01:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25479 to 25079. [2018-11-07 21:01:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25079 states. [2018-11-07 21:01:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25079 states to 25079 states and 26969 transitions. [2018-11-07 21:01:00,640 INFO L78 Accepts]: Start accepts. Automaton has 25079 states and 26969 transitions. Word has length 1023 [2018-11-07 21:01:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:01:00,641 INFO L480 AbstractCegarLoop]: Abstraction has 25079 states and 26969 transitions. [2018-11-07 21:01:00,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 21:01:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 25079 states and 26969 transitions. [2018-11-07 21:01:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1327 [2018-11-07 21:01:00,684 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:01:00,685 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:01:00,685 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:01:00,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash 474339432, now seen corresponding path program 1 times [2018-11-07 21:01:00,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:01:00,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:00,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:00,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:00,687 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:01:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3584 backedges. 822 proven. 336 refuted. 0 times theorem prover too weak. 2426 trivial. 0 not checked. [2018-11-07 21:01:02,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:02,473 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:01:02,473 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1327 with the following transitions: [2018-11-07 21:01:02,473 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [964], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1272], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1445], [1449], [1453], [1456], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 21:01:02,478 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:01:02,478 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:01:02,523 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:01:04,364 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:01:04,364 INFO L272 AbstractInterpreter]: Visited 281 different actions 2249 times. Merged at 13 different actions 82 times. Widened at 1 different actions 3 times. Found 23 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 21:01:04,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:04,371 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:01:04,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:04,371 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:01:04,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:04,381 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:01:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:04,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:01:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3584 backedges. 2459 proven. 2 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2018-11-07 21:01:05,977 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:01:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3584 backedges. 822 proven. 336 refuted. 0 times theorem prover too weak. 2426 trivial. 0 not checked. [2018-11-07 21:01:06,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:01:06,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 21:01:06,902 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:01:06,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 21:01:06,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 21:01:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-07 21:01:06,904 INFO L87 Difference]: Start difference. First operand 25079 states and 26969 transitions. Second operand 9 states. [2018-11-07 21:01:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:01:11,029 INFO L93 Difference]: Finished difference Result 47587 states and 51326 transitions. [2018-11-07 21:01:11,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 21:01:11,033 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1326 [2018-11-07 21:01:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:01:11,087 INFO L225 Difference]: With dead ends: 47587 [2018-11-07 21:01:11,087 INFO L226 Difference]: Without dead ends: 23825 [2018-11-07 21:01:11,129 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2669 GetRequests, 2653 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2018-11-07 21:01:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23825 states. [2018-11-07 21:01:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23825 to 23334. [2018-11-07 21:01:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23334 states. [2018-11-07 21:01:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23334 states to 23334 states and 24838 transitions. [2018-11-07 21:01:11,481 INFO L78 Accepts]: Start accepts. Automaton has 23334 states and 24838 transitions. Word has length 1326 [2018-11-07 21:01:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:01:11,483 INFO L480 AbstractCegarLoop]: Abstraction has 23334 states and 24838 transitions. [2018-11-07 21:01:11,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 21:01:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 23334 states and 24838 transitions. [2018-11-07 21:01:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1353 [2018-11-07 21:01:11,519 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:01:11,520 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:01:11,520 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:01:11,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:11,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1585681856, now seen corresponding path program 1 times [2018-11-07 21:01:11,521 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:01:11,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:11,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:11,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:11,522 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:01:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3732 backedges. 1015 proven. 250 refuted. 0 times theorem prover too weak. 2467 trivial. 0 not checked. [2018-11-07 21:01:13,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:13,300 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:01:13,300 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1353 with the following transitions: [2018-11-07 21:01:13,300 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [676], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [964], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1288], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1445], [1449], [1453], [1456], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 21:01:13,305 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:01:13,305 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:01:13,816 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:01:14,841 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:01:14,841 INFO L272 AbstractInterpreter]: Visited 281 different actions 1672 times. Merged at 7 different actions 43 times. Widened at 1 different actions 2 times. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 21:01:14,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:14,846 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:01:14,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:14,846 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:01:14,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:14,856 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:01:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:15,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:01:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3732 backedges. 2425 proven. 2 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2018-11-07 21:01:16,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:01:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3732 backedges. 1015 proven. 250 refuted. 0 times theorem prover too weak. 2467 trivial. 0 not checked. [2018-11-07 21:01:17,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:01:17,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 21:01:17,218 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:01:17,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 21:01:17,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 21:01:17,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-07 21:01:17,220 INFO L87 Difference]: Start difference. First operand 23334 states and 24838 transitions. Second operand 9 states. [2018-11-07 21:01:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:01:22,445 INFO L93 Difference]: Finished difference Result 47709 states and 51821 transitions. [2018-11-07 21:01:22,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-07 21:01:22,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1352 [2018-11-07 21:01:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:01:22,529 INFO L225 Difference]: With dead ends: 47709 [2018-11-07 21:01:22,529 INFO L226 Difference]: Without dead ends: 25692 [2018-11-07 21:01:22,571 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2732 GetRequests, 2710 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2018-11-07 21:01:22,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25692 states. [2018-11-07 21:01:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25692 to 25313. [2018-11-07 21:01:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25313 states. [2018-11-07 21:01:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25313 states to 25313 states and 27547 transitions. [2018-11-07 21:01:23,230 INFO L78 Accepts]: Start accepts. Automaton has 25313 states and 27547 transitions. Word has length 1352 [2018-11-07 21:01:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:01:23,232 INFO L480 AbstractCegarLoop]: Abstraction has 25313 states and 27547 transitions. [2018-11-07 21:01:23,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 21:01:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 25313 states and 27547 transitions. [2018-11-07 21:01:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1356 [2018-11-07 21:01:23,269 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:01:23,269 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:01:23,270 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:01:23,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:23,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1142951019, now seen corresponding path program 1 times [2018-11-07 21:01:23,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:01:23,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:23,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:23,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:01:23,271 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:01:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:24,436 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 21:01:24,722 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-11-07 21:01:25,188 WARN L179 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-11-07 21:01:25,608 WARN L179 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-11-07 21:01:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1864 proven. 260 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2018-11-07 21:01:27,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:27,731 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:01:27,732 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1356 with the following transitions: [2018-11-07 21:01:27,732 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [964], [965], [969], [972], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1272], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1445], [1449], [1453], [1456], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 21:01:27,736 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:01:27,737 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:01:27,793 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:01:29,389 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:01:29,390 INFO L272 AbstractInterpreter]: Visited 281 different actions 2251 times. Merged at 13 different actions 84 times. Widened at 1 different actions 3 times. Found 23 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 21:01:29,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:01:29,395 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:01:29,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:01:29,395 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:01:29,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:01:29,405 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:01:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:01:29,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:01:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1406 proven. 2 refuted. 0 times theorem prover too weak. 2290 trivial. 0 not checked. [2018-11-07 21:01:30,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:01:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1406 proven. 2 refuted. 0 times theorem prover too weak. 2290 trivial. 0 not checked. [2018-11-07 21:01:31,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:01:31,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 19 [2018-11-07 21:01:31,800 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:01:31,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 21:01:31,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 21:01:31,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2018-11-07 21:01:31,803 INFO L87 Difference]: Start difference. First operand 25313 states and 27547 transitions. Second operand 18 states. Received shutdown request... [2018-11-07 21:01:40,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 21:01:40,309 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 21:01:40,315 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 21:01:40,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 09:01:40 BoogieIcfgContainer [2018-11-07 21:01:40,316 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 21:01:40,317 INFO L168 Benchmark]: Toolchain (without parser) took 210405.80 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -251.3 MB). Peak memory consumption was 3.0 GB. Max. memory is 7.1 GB. [2018-11-07 21:01:40,318 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 21:01:40,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1216.50 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-07 21:01:40,319 INFO L168 Benchmark]: Boogie Procedure Inliner took 248.87 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -892.2 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-11-07 21:01:40,320 INFO L168 Benchmark]: Boogie Preprocessor took 140.38 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 21:01:40,320 INFO L168 Benchmark]: RCFGBuilder took 6559.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 258.4 MB). Peak memory consumption was 258.4 MB. Max. memory is 7.1 GB. [2018-11-07 21:01:40,321 INFO L168 Benchmark]: TraceAbstraction took 202234.20 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 297.9 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2018-11-07 21:01:40,328 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 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 1216.50 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 248.87 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -892.2 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.38 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 6559.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 258.4 MB). Peak memory consumption was 258.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202234.20 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 297.9 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 139]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 139). Cancelled while BasicCegarLoop was constructing difference of abstraction (25313states) and FLOYD_HOARE automaton (currently 31 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (17239 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 202.1s OverallTime, 15 OverallIterations, 9 TraceHistogramMax, 143.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2682 SDtfs, 35775 SDslu, 2915 SDs, 0 SdLazy, 52111 SolverSat, 6213 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 70.5s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 13203 GetRequests, 12684 SyntacticMatches, 255 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3760 ImplicationChecksByTransitivity, 16.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25313occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 13.7s AbstIntTime, 8 AbstIntIterations, 3 AbstIntStrong, 0.998390619572181 AbsIntWeakeningRatio, 0.05025927403270842 AbsIntAvgWeakeningVarsNumRemoved, 10.627842042281612 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.8s AutomataMinimizationTime, 14 MinimizatonAttempts, 2110 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 17.6s InterpolantComputationTime, 13807 NumberOfCodeBlocks, 13807 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 18981 ConstructedInterpolants, 0 QuantifiedInterpolants, 46092846 SizeOfPredicates, 2 NumberOfNonLiveVariables, 6942 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 25 InterpolantComputations, 9 PerfectInterpolantSequences, 40457/43548 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown