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/Problem03_label12_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 17:17:44,865 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 17:17:44,867 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 17:17:44,880 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 17:17:44,880 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 17:17:44,881 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 17:17:44,883 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 17:17:44,886 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 17:17:44,888 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 17:17:44,894 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 17:17:44,895 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 17:17:44,896 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 17:17:44,896 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 17:17:44,899 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 17:17:44,901 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 17:17:44,903 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 17:17:44,903 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 17:17:44,906 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 17:17:44,910 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 17:17:44,914 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 17:17:44,915 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 17:17:44,916 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 17:17:44,919 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 17:17:44,919 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 17:17:44,919 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 17:17:44,922 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 17:17:44,923 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 17:17:44,924 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 17:17:44,925 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 17:17:44,928 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 17:17:44,928 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 17:17:44,929 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 17:17:44,929 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 17:17:44,929 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 17:17:44,932 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 17:17:44,934 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 17:17:44,935 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 17:17:44,961 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 17:17:44,961 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 17:17:44,963 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 17:17:44,963 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 17:17:44,963 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 17:17:44,963 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 17:17:44,964 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 17:17:44,964 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 17:17:44,964 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 17:17:44,964 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 17:17:44,964 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 17:17:44,965 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 17:17:44,968 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 17:17:44,969 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 17:17:44,969 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 17:17:44,969 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 17:17:44,969 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 17:17:44,970 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 17:17:44,970 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 17:17:44,970 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 17:17:44,970 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 17:17:44,970 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 17:17:44,970 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 17:17:44,971 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 17:17:44,971 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 17:17:44,971 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 17:17:44,971 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 17:17:44,972 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 17:17:44,972 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 17:17:44,972 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 17:17:44,972 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 17:17:44,972 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 17:17:44,973 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 17:17:44,973 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 17:17:44,973 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 17:17:45,019 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 17:17:45,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 17:17:45,049 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 17:17:45,051 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 17:17:45,051 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 17:17:45,052 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c [2018-11-12 17:17:45,126 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72d1345e5/e9c09dbed12a4571852344d062c23781/FLAG9fb33d21d [2018-11-12 17:17:45,851 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 17:17:45,854 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c [2018-11-12 17:17:45,876 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72d1345e5/e9c09dbed12a4571852344d062c23781/FLAG9fb33d21d [2018-11-12 17:17:45,895 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72d1345e5/e9c09dbed12a4571852344d062c23781 [2018-11-12 17:17:45,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 17:17:45,909 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 17:17:45,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 17:17:45,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 17:17:45,915 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 17:17:45,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 05:17:45" (1/1) ... [2018-11-12 17:17:45,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@394146b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:45, skipping insertion in model container [2018-11-12 17:17:45,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 05:17:45" (1/1) ... [2018-11-12 17:17:45,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 17:17:46,025 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 17:17:46,711 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 17:17:46,717 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 17:17:46,959 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 17:17:46,986 INFO L193 MainTranslator]: Completed translation [2018-11-12 17:17:46,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46 WrapperNode [2018-11-12 17:17:46,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 17:17:46,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 17:17:46,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 17:17:46,989 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 17:17:47,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (1/1) ... [2018-11-12 17:17:47,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (1/1) ... [2018-11-12 17:17:47,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 17:17:47,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 17:17:47,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 17:17:47,194 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 17:17:47,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (1/1) ... [2018-11-12 17:17:47,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (1/1) ... [2018-11-12 17:17:47,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (1/1) ... [2018-11-12 17:17:47,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (1/1) ... [2018-11-12 17:17:47,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (1/1) ... [2018-11-12 17:17:47,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (1/1) ... [2018-11-12 17:17:47,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (1/1) ... [2018-11-12 17:17:47,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 17:17:47,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 17:17:47,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 17:17:47,304 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 17:17:47,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 17:17:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 17:17:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 17:17:47,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 17:17:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 17:17:47,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 17:17:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 17:17:47,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 17:17:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 17:17:47,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 17:17:52,378 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 17:17:52,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 05:17:52 BoogieIcfgContainer [2018-11-12 17:17:52,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 17:17:52,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 17:17:52,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 17:17:52,384 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 17:17:52,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 05:17:45" (1/3) ... [2018-11-12 17:17:52,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0a0a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 05:17:52, skipping insertion in model container [2018-11-12 17:17:52,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:46" (2/3) ... [2018-11-12 17:17:52,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0a0a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 05:17:52, skipping insertion in model container [2018-11-12 17:17:52,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 05:17:52" (3/3) ... [2018-11-12 17:17:52,389 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label12_true-unreach-call.c [2018-11-12 17:17:52,399 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 17:17:52,410 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 17:17:52,429 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 17:17:52,482 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 17:17:52,482 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 17:17:52,482 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 17:17:52,483 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 17:17:52,483 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 17:17:52,483 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 17:17:52,483 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 17:17:52,483 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 17:17:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-12 17:17:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-11-12 17:17:52,554 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:17:52,555 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:17:52,559 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:17:52,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:17:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash -927745007, now seen corresponding path program 1 times [2018-11-12 17:17:52,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:17:52,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:52,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:17:52,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:52,618 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:17:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:17:53,538 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 17:17:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:17:53,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:17:53,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 17:17:53,728 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:17:53,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:17:53,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:17:53,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:17:53,754 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-11-12 17:17:56,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:17:56,092 INFO L93 Difference]: Finished difference Result 845 states and 1487 transitions. [2018-11-12 17:17:56,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:17:56,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2018-11-12 17:17:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:17:56,119 INFO L225 Difference]: With dead ends: 845 [2018-11-12 17:17:56,119 INFO L226 Difference]: Without dead ends: 531 [2018-11-12 17:17:56,127 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:17:56,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-11-12 17:17:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 530. [2018-11-12 17:17:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-11-12 17:17:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 869 transitions. [2018-11-12 17:17:56,219 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 869 transitions. Word has length 170 [2018-11-12 17:17:56,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:17:56,221 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 869 transitions. [2018-11-12 17:17:56,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:17:56,221 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 869 transitions. [2018-11-12 17:17:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-11-12 17:17:56,228 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:17:56,229 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:17:56,229 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:17:56,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:17:56,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1807947448, now seen corresponding path program 1 times [2018-11-12 17:17:56,230 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:17:56,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:56,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:17:56,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:56,232 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:17:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:17:56,583 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-12 17:17:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:17:56,904 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:17:56,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 17:17:56,904 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:17:56,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 17:17:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 17:17:56,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 17:17:56,907 INFO L87 Difference]: Start difference. First operand 530 states and 869 transitions. Second operand 6 states. [2018-11-12 17:18:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:00,677 INFO L93 Difference]: Finished difference Result 1599 states and 2688 transitions. [2018-11-12 17:18:00,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 17:18:00,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2018-11-12 17:18:00,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:00,692 INFO L225 Difference]: With dead ends: 1599 [2018-11-12 17:18:00,693 INFO L226 Difference]: Without dead ends: 1075 [2018-11-12 17:18:00,697 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 17:18:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2018-11-12 17:18:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1034. [2018-11-12 17:18:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2018-11-12 17:18:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1689 transitions. [2018-11-12 17:18:00,784 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1689 transitions. Word has length 180 [2018-11-12 17:18:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:00,784 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 1689 transitions. [2018-11-12 17:18:00,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 17:18:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1689 transitions. [2018-11-12 17:18:00,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-11-12 17:18:00,789 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:00,789 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:18:00,789 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:00,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash 479453333, now seen corresponding path program 1 times [2018-11-12 17:18:00,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:00,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:00,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:00,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:00,792 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:01,121 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:18:01,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 17:18:01,121 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:01,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:18:01,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:18:01,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:18:01,123 INFO L87 Difference]: Start difference. First operand 1034 states and 1689 transitions. Second operand 3 states. [2018-11-12 17:18:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:03,947 INFO L93 Difference]: Finished difference Result 2912 states and 4936 transitions. [2018-11-12 17:18:03,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:18:03,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2018-11-12 17:18:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:03,971 INFO L225 Difference]: With dead ends: 2912 [2018-11-12 17:18:03,972 INFO L226 Difference]: Without dead ends: 1884 [2018-11-12 17:18:03,977 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:18:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-11-12 17:18:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1881. [2018-11-12 17:18:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1881 states. [2018-11-12 17:18:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2981 transitions. [2018-11-12 17:18:04,055 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2981 transitions. Word has length 183 [2018-11-12 17:18:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:04,056 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 2981 transitions. [2018-11-12 17:18:04,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:18:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2981 transitions. [2018-11-12 17:18:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-12 17:18:04,067 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:04,067 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:18:04,069 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:04,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1957803305, now seen corresponding path program 1 times [2018-11-12 17:18:04,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:04,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:04,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:04,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:04,072 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:04,333 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:18:04,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 17:18:04,333 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:04,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 17:18:04,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 17:18:04,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:18:04,334 INFO L87 Difference]: Start difference. First operand 1881 states and 2981 transitions. Second operand 7 states. [2018-11-12 17:18:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:07,301 INFO L93 Difference]: Finished difference Result 5729 states and 9791 transitions. [2018-11-12 17:18:07,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 17:18:07,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 189 [2018-11-12 17:18:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:07,340 INFO L225 Difference]: With dead ends: 5729 [2018-11-12 17:18:07,341 INFO L226 Difference]: Without dead ends: 3854 [2018-11-12 17:18:07,350 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-11-12 17:18:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2018-11-12 17:18:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3744. [2018-11-12 17:18:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3744 states. [2018-11-12 17:18:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 6108 transitions. [2018-11-12 17:18:07,513 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 6108 transitions. Word has length 189 [2018-11-12 17:18:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:07,514 INFO L480 AbstractCegarLoop]: Abstraction has 3744 states and 6108 transitions. [2018-11-12 17:18:07,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 17:18:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 6108 transitions. [2018-11-12 17:18:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-12 17:18:07,528 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:07,528 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:18:07,529 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:07,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:07,529 INFO L82 PathProgramCache]: Analyzing trace with hash -551348028, now seen corresponding path program 1 times [2018-11-12 17:18:07,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:07,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:07,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:07,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:07,531 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:07,732 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 17:18:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:07,777 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:18:07,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 17:18:07,777 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:07,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 17:18:07,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 17:18:07,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 17:18:07,778 INFO L87 Difference]: Start difference. First operand 3744 states and 6108 transitions. Second operand 6 states. [2018-11-12 17:18:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:10,097 INFO L93 Difference]: Finished difference Result 8125 states and 13602 transitions. [2018-11-12 17:18:10,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 17:18:10,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2018-11-12 17:18:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:10,134 INFO L225 Difference]: With dead ends: 8125 [2018-11-12 17:18:10,134 INFO L226 Difference]: Without dead ends: 4387 [2018-11-12 17:18:10,150 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 [2018-11-12 17:18:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2018-11-12 17:18:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4215. [2018-11-12 17:18:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2018-11-12 17:18:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 6296 transitions. [2018-11-12 17:18:10,283 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 6296 transitions. Word has length 190 [2018-11-12 17:18:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:10,284 INFO L480 AbstractCegarLoop]: Abstraction has 4215 states and 6296 transitions. [2018-11-12 17:18:10,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 17:18:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 6296 transitions. [2018-11-12 17:18:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-11-12 17:18:10,295 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:10,295 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:18:10,295 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:10,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:10,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1721729602, now seen corresponding path program 1 times [2018-11-12 17:18:10,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:10,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:10,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:10,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:10,297 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:10,538 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 17:18:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:10,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:18:10,691 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:18:10,692 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 195 with the following transitions: [2018-11-12 17:18:10,694 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:18:10,774 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:18:10,775 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:18:12,353 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:18:12,357 INFO L272 AbstractInterpreter]: Visited 171 different actions 171 times. Never merged. Never widened. Performed 3115 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3115 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 88 variables. [2018-11-12 17:18:12,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:12,403 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:18:13,873 INFO L227 lantSequenceWeakener]: Weakened 183 states. On average, predicates are now at 71.85% of their original sizes. [2018-11-12 17:18:13,873 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:18:15,717 INFO L415 sIntCurrentIteration]: We unified 193 AI predicates to 193 [2018-11-12 17:18:15,717 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:18:15,718 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:18:15,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [5] total 24 [2018-11-12 17:18:15,719 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:15,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 17:18:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 17:18:15,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2018-11-12 17:18:15,720 INFO L87 Difference]: Start difference. First operand 4215 states and 6296 transitions. Second operand 21 states. [2018-11-12 17:18:47,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:47,300 INFO L93 Difference]: Finished difference Result 8634 states and 12893 transitions. [2018-11-12 17:18:47,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 17:18:47,301 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 194 [2018-11-12 17:18:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:47,323 INFO L225 Difference]: With dead ends: 8634 [2018-11-12 17:18:47,323 INFO L226 Difference]: Without dead ends: 4425 [2018-11-12 17:18:47,336 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2018-11-12 17:18:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4425 states. [2018-11-12 17:18:47,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4425 to 4423. [2018-11-12 17:18:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4423 states. [2018-11-12 17:18:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6513 transitions. [2018-11-12 17:18:47,472 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6513 transitions. Word has length 194 [2018-11-12 17:18:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:47,473 INFO L480 AbstractCegarLoop]: Abstraction has 4423 states and 6513 transitions. [2018-11-12 17:18:47,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 17:18:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6513 transitions. [2018-11-12 17:18:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-11-12 17:18:47,486 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:47,486 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:18:47,487 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:47,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:47,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1815420179, now seen corresponding path program 1 times [2018-11-12 17:18:47,488 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:47,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:47,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:47,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:47,489 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:47,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:18:47,730 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:18:47,730 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 204 with the following transitions: [2018-11-12 17:18:47,731 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:18:47,745 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:18:47,745 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:18:50,181 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:18:50,182 INFO L272 AbstractInterpreter]: Visited 175 different actions 342 times. Merged at 4 different actions 4 times. Never widened. Performed 7942 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7942 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:18:50,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:50,189 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:18:50,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:18:50,189 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 17:18:50,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:50,205 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:18:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:50,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:18:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-12 17:18:50,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:18:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-12 17:18:50,767 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:18:50,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2018-11-12 17:18:50,768 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:50,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:18:50,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:18:50,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:18:50,769 INFO L87 Difference]: Start difference. First operand 4423 states and 6513 transitions. Second operand 3 states. [2018-11-12 17:18:52,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:52,353 INFO L93 Difference]: Finished difference Result 8630 states and 12805 transitions. [2018-11-12 17:18:52,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:18:52,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2018-11-12 17:18:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:52,380 INFO L225 Difference]: With dead ends: 8630 [2018-11-12 17:18:52,380 INFO L226 Difference]: Without dead ends: 4421 [2018-11-12 17:18:52,391 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:18:52,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2018-11-12 17:18:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 4421. [2018-11-12 17:18:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4421 states. [2018-11-12 17:18:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 6509 transitions. [2018-11-12 17:18:52,512 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 6509 transitions. Word has length 203 [2018-11-12 17:18:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:52,512 INFO L480 AbstractCegarLoop]: Abstraction has 4421 states and 6509 transitions. [2018-11-12 17:18:52,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:18:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 6509 transitions. [2018-11-12 17:18:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-12 17:18:52,524 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:52,525 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:18:52,525 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:52,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:52,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1185740873, now seen corresponding path program 1 times [2018-11-12 17:18:52,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:52,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:52,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:52,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:52,527 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:52,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:18:52,997 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:18:52,998 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-11-12 17:18:52,998 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:18:53,005 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:18:53,006 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:18:54,972 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:18:54,973 INFO L272 AbstractInterpreter]: Visited 175 different actions 342 times. Merged at 4 different actions 4 times. Never widened. Performed 7932 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7932 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:18:54,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:54,981 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:18:54,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:18:54,981 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 17:18:54,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:54,990 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:18:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:55,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:18:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-12 17:18:55,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:18:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-12 17:18:55,735 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:18:55,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-12 17:18:55,735 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:55,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:18:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:18:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:18:55,737 INFO L87 Difference]: Start difference. First operand 4421 states and 6509 transitions. Second operand 3 states. [2018-11-12 17:18:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:57,623 INFO L93 Difference]: Finished difference Result 12525 states and 19198 transitions. [2018-11-12 17:18:57,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:18:57,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2018-11-12 17:18:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:57,679 INFO L225 Difference]: With dead ends: 12525 [2018-11-12 17:18:57,679 INFO L226 Difference]: Without dead ends: 8318 [2018-11-12 17:18:57,694 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:18:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2018-11-12 17:18:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 8173. [2018-11-12 17:18:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8173 states. [2018-11-12 17:18:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8173 states to 8173 states and 12228 transitions. [2018-11-12 17:18:57,896 INFO L78 Accepts]: Start accepts. Automaton has 8173 states and 12228 transitions. Word has length 210 [2018-11-12 17:18:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:57,897 INFO L480 AbstractCegarLoop]: Abstraction has 8173 states and 12228 transitions. [2018-11-12 17:18:57,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:18:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8173 states and 12228 transitions. [2018-11-12 17:18:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-11-12 17:18:57,919 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:57,920 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:18:57,920 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:57,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:57,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1505272723, now seen corresponding path program 1 times [2018-11-12 17:18:57,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:57,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:57,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:57,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:57,922 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:58,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:18:58,427 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:18:58,427 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 213 with the following transitions: [2018-11-12 17:18:58,427 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:18:58,433 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:18:58,433 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:19:00,043 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:19:00,043 INFO L272 AbstractInterpreter]: Visited 175 different actions 342 times. Merged at 4 different actions 4 times. Never widened. Performed 7957 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7957 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:19:00,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:00,052 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:19:00,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:00,052 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-12 17:19:00,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:00,063 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:19:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:00,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:19:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:19:00,770 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:19:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:19:01,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:19:01,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-11-12 17:19:01,371 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:19:01,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 17:19:01,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 17:19:01,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-12 17:19:01,372 INFO L87 Difference]: Start difference. First operand 8173 states and 12228 transitions. Second operand 9 states. [2018-11-12 17:19:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:19:14,850 INFO L93 Difference]: Finished difference Result 66256 states and 136601 transitions. [2018-11-12 17:19:14,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-12 17:19:14,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2018-11-12 17:19:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:19:15,324 INFO L225 Difference]: With dead ends: 66256 [2018-11-12 17:19:15,324 INFO L226 Difference]: Without dead ends: 58297 [2018-11-12 17:19:15,512 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2018-11-12 17:19:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58297 states. [2018-11-12 17:19:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58297 to 55365. [2018-11-12 17:19:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55365 states. [2018-11-12 17:19:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55365 states to 55365 states and 79260 transitions. [2018-11-12 17:19:17,910 INFO L78 Accepts]: Start accepts. Automaton has 55365 states and 79260 transitions. Word has length 212 [2018-11-12 17:19:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:19:17,911 INFO L480 AbstractCegarLoop]: Abstraction has 55365 states and 79260 transitions. [2018-11-12 17:19:17,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 17:19:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 55365 states and 79260 transitions. [2018-11-12 17:19:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-11-12 17:19:18,047 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:19:18,048 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:19:18,048 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:19:18,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:18,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2036604121, now seen corresponding path program 1 times [2018-11-12 17:19:18,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:19:18,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:18,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:18,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:18,050 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:19:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:19:18,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:18,550 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:19:18,551 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2018-11-12 17:19:18,551 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [147], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:19:18,556 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:19:18,556 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:19:21,142 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:19:21,142 INFO L272 AbstractInterpreter]: Visited 175 different actions 345 times. Merged at 5 different actions 7 times. Never widened. Performed 11110 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11110 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:19:21,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:21,151 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:19:21,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:21,151 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-12 17:19:21,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:21,159 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:19:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:21,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:19:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:19:21,433 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:19:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:19:21,739 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:19:21,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-11-12 17:19:21,739 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:19:21,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:19:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:19:21,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-12 17:19:21,741 INFO L87 Difference]: Start difference. First operand 55365 states and 79260 transitions. Second operand 3 states. [2018-11-12 17:19:23,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:19:23,806 INFO L93 Difference]: Finished difference Result 107961 states and 153617 transitions. [2018-11-12 17:19:23,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:19:23,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2018-11-12 17:19:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:19:24,130 INFO L225 Difference]: With dead ends: 107961 [2018-11-12 17:19:24,130 INFO L226 Difference]: Without dead ends: 66183 [2018-11-12 17:19:24,239 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-12 17:19:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66183 states. [2018-11-12 17:19:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66183 to 64658. [2018-11-12 17:19:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64658 states. [2018-11-12 17:19:26,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64658 states to 64658 states and 92068 transitions. [2018-11-12 17:19:26,200 INFO L78 Accepts]: Start accepts. Automaton has 64658 states and 92068 transitions. Word has length 233 [2018-11-12 17:19:26,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:19:26,201 INFO L480 AbstractCegarLoop]: Abstraction has 64658 states and 92068 transitions. [2018-11-12 17:19:26,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:19:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 64658 states and 92068 transitions. [2018-11-12 17:19:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-11-12 17:19:26,282 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:19:26,282 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:19:26,283 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:19:26,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:26,283 INFO L82 PathProgramCache]: Analyzing trace with hash 744626209, now seen corresponding path program 1 times [2018-11-12 17:19:26,283 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:19:26,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:26,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:26,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:26,285 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:19:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:26,568 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 17:19:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-12 17:19:26,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:26,629 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:19:26,629 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 247 with the following transitions: [2018-11-12 17:19:26,630 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:19:26,634 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:19:26,634 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:19:28,389 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:19:28,389 INFO L272 AbstractInterpreter]: Visited 174 different actions 344 times. Merged at 5 different actions 7 times. Never widened. Performed 11191 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11191 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:19:28,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:28,397 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:19:30,855 INFO L227 lantSequenceWeakener]: Weakened 89 states. On average, predicates are now at 74.88% of their original sizes. [2018-11-12 17:19:30,855 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:19:36,707 INFO L415 sIntCurrentIteration]: We unified 245 AI predicates to 245 [2018-11-12 17:19:36,707 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:19:36,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:19:36,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-12 17:19:36,708 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:19:36,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 17:19:36,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 17:19:36,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2018-11-12 17:19:36,709 INFO L87 Difference]: Start difference. First operand 64658 states and 92068 transitions. Second operand 22 states. [2018-11-12 17:20:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:20:19,354 INFO L93 Difference]: Finished difference Result 130118 states and 185056 transitions. [2018-11-12 17:20:19,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 17:20:19,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 246 [2018-11-12 17:20:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:20:19,581 INFO L225 Difference]: With dead ends: 130118 [2018-11-12 17:20:19,581 INFO L226 Difference]: Without dead ends: 65679 [2018-11-12 17:20:19,691 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 256 GetRequests, 152 SyntacticMatches, 73 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2018-11-12 17:20:19,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65679 states. [2018-11-12 17:20:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65679 to 65674. [2018-11-12 17:20:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65674 states. [2018-11-12 17:20:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65674 states to 65674 states and 92923 transitions. [2018-11-12 17:20:21,217 INFO L78 Accepts]: Start accepts. Automaton has 65674 states and 92923 transitions. Word has length 246 [2018-11-12 17:20:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:20:21,218 INFO L480 AbstractCegarLoop]: Abstraction has 65674 states and 92923 transitions. [2018-11-12 17:20:21,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-12 17:20:21,218 INFO L276 IsEmpty]: Start isEmpty. Operand 65674 states and 92923 transitions. [2018-11-12 17:20:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-12 17:20:21,272 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:20:21,273 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:20:21,273 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:20:21,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:20:21,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1403817372, now seen corresponding path program 1 times [2018-11-12 17:20:21,274 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:20:21,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:20:21,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:20:21,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:20:21,275 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:20:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:20:21,843 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 17:20:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:20:22,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:20:22,071 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:20:22,071 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-11-12 17:20:22,072 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:20:22,078 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:20:22,078 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:20:24,747 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:20:24,747 INFO L272 AbstractInterpreter]: Visited 175 different actions 342 times. Merged at 4 different actions 4 times. Never widened. Performed 7987 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7987 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:20:24,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:20:24,758 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:20:24,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:20:24,758 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-12 17:20:24,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:20:24,768 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:20:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:20:24,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:20:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:20:25,992 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:20:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:20:26,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:20:26,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-11-12 17:20:26,322 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:20:26,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-12 17:20:26,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-12 17:20:26,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-12 17:20:26,326 INFO L87 Difference]: Start difference. First operand 65674 states and 92923 transitions. Second operand 12 states. [2018-11-12 17:20:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:20:42,320 INFO L93 Difference]: Finished difference Result 229443 states and 350265 transitions. [2018-11-12 17:20:42,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-11-12 17:20:42,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 251 [2018-11-12 17:20:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:20:43,098 INFO L225 Difference]: With dead ends: 229443 [2018-11-12 17:20:43,098 INFO L226 Difference]: Without dead ends: 165037 [2018-11-12 17:20:43,326 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3664 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1514, Invalid=8386, Unknown=0, NotChecked=0, Total=9900 [2018-11-12 17:20:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165037 states. [2018-11-12 17:20:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165037 to 161587. [2018-11-12 17:20:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161587 states. [2018-11-12 17:20:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161587 states to 161587 states and 213010 transitions. [2018-11-12 17:20:47,567 INFO L78 Accepts]: Start accepts. Automaton has 161587 states and 213010 transitions. Word has length 251 [2018-11-12 17:20:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:20:47,568 INFO L480 AbstractCegarLoop]: Abstraction has 161587 states and 213010 transitions. [2018-11-12 17:20:47,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-12 17:20:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 161587 states and 213010 transitions. [2018-11-12 17:20:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-11-12 17:20:47,656 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:20:47,657 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:20:47,657 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:20:47,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:20:47,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1697646380, now seen corresponding path program 1 times [2018-11-12 17:20:47,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:20:47,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:20:47,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:20:47,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:20:47,658 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:20:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:20:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:20:48,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:20:48,247 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:20:48,247 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 291 with the following transitions: [2018-11-12 17:20:48,248 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [409], [412], [416], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:20:48,254 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:20:48,254 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:20:51,106 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:20:51,106 INFO L272 AbstractInterpreter]: Visited 175 different actions 345 times. Merged at 5 different actions 7 times. Never widened. Performed 10406 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10406 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:20:51,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:20:51,115 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:20:51,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:20:51,115 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 17:20:51,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:20:51,125 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:20:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:20:51,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:20:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:20:51,421 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:20:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:20:51,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:20:51,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-12 17:20:51,580 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:20:51,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 17:20:51,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 17:20:51,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:20:51,581 INFO L87 Difference]: Start difference. First operand 161587 states and 213010 transitions. Second operand 6 states. [2018-11-12 17:20:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:20:58,948 INFO L93 Difference]: Finished difference Result 299690 states and 394661 transitions. [2018-11-12 17:20:58,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-12 17:20:58,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 290 [2018-11-12 17:20:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:20:59,408 INFO L225 Difference]: With dead ends: 299690 [2018-11-12 17:20:59,409 INFO L226 Difference]: Without dead ends: 148993 [2018-11-12 17:20:59,588 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 579 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-12 17:20:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148993 states. [2018-11-12 17:21:01,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148993 to 148253. [2018-11-12 17:21:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148253 states. [2018-11-12 17:21:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148253 states to 148253 states and 191128 transitions. [2018-11-12 17:21:02,891 INFO L78 Accepts]: Start accepts. Automaton has 148253 states and 191128 transitions. Word has length 290 [2018-11-12 17:21:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:21:02,892 INFO L480 AbstractCegarLoop]: Abstraction has 148253 states and 191128 transitions. [2018-11-12 17:21:02,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 17:21:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 148253 states and 191128 transitions. [2018-11-12 17:21:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-11-12 17:21:02,963 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:21:02,963 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 17:21:02,963 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:21:02,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:21:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash -794164287, now seen corresponding path program 1 times [2018-11-12 17:21:02,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:21:02,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:21:02,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:21:02,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:21:02,965 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:21:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:21:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 153 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 17:21:03,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:21:03,448 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:21:03,448 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 310 with the following transitions: [2018-11-12 17:21:03,448 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [139], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [315], [318], [322], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:21:03,452 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:21:03,452 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:21:06,723 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:21:06,723 INFO L272 AbstractInterpreter]: Visited 178 different actions 524 times. Merged at 7 different actions 15 times. Never widened. Performed 12795 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12795 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-12 17:21:06,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:21:06,733 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:21:06,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:21:06,733 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 17:21:06,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:21:06,741 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:21:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:21:06,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:21:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-11-12 17:21:07,051 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:21:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 153 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 17:21:07,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:21:07,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2018-11-12 17:21:07,246 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:21:07,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 17:21:07,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 17:21:07,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-11-12 17:21:07,247 INFO L87 Difference]: Start difference. First operand 148253 states and 191128 transitions. Second operand 10 states. [2018-11-12 17:21:15,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:21:15,055 INFO L93 Difference]: Finished difference Result 264277 states and 350897 transitions. [2018-11-12 17:21:15,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-12 17:21:15,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 309 [2018-11-12 17:21:15,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:21:15,612 INFO L225 Difference]: With dead ends: 264277 [2018-11-12 17:21:15,612 INFO L226 Difference]: Without dead ends: 156963 [2018-11-12 17:21:15,786 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2018-11-12 17:21:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156963 states. Received shutdown request... [2018-11-12 17:21:16,319 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 17:21:16,324 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 17:21:16,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 05:21:16 BoogieIcfgContainer [2018-11-12 17:21:16,325 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 17:21:16,325 INFO L168 Benchmark]: Toolchain (without parser) took 210417.16 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 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-11-12 17:21:16,327 INFO L168 Benchmark]: CDTParser took 0.19 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. [2018-11-12 17:21:16,327 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1077.31 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. [2018-11-12 17:21:16,328 INFO L168 Benchmark]: Boogie Procedure Inliner took 205.15 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -879.8 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2018-11-12 17:21:16,329 INFO L168 Benchmark]: Boogie Preprocessor took 109.41 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. [2018-11-12 17:21:16,329 INFO L168 Benchmark]: RCFGBuilder took 5075.61 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 270.0 MB). Peak memory consumption was 270.0 MB. Max. memory is 7.1 GB. [2018-11-12 17:21:16,330 INFO L168 Benchmark]: TraceAbstraction took 203944.67 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 1.9 GB in the beginning and 2.7 GB in the end (delta: -769.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-11-12 17:21:16,343 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 1077.31 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 205.15 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -879.8 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.41 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 5075.61 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 270.0 MB). Peak memory consumption was 270.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 203944.67 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 1.9 GB in the beginning and 2.7 GB in the end (delta: -769.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1524]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1524). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 203.8s OverallTime, 14 OverallIterations, 4 TraceHistogramMax, 142.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3573 SDtfs, 20584 SDslu, 3832 SDs, 0 SdLazy, 35362 SolverSat, 6055 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 80.5s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 4138 GetRequests, 3798 SyntacticMatches, 82 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4948 ImplicationChecksByTransitivity, 16.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=161587occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 20.9s AbstIntTime, 9 AbstIntIterations, 2 AbstIntStrong, 0.9991741657537154 AbsIntWeakeningRatio, 0.2876712328767123 AbsIntAvgWeakeningVarsNumRemoved, 38.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 14.9s AutomataMinimizationTime, 14 MinimizatonAttempts, 9126 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 4768 NumberOfCodeBlocks, 4768 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 6448 ConstructedInterpolants, 0 QuantifiedInterpolants, 3765497 SizeOfPredicates, 31 NumberOfNonLiveVariables, 7600 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 28 InterpolantComputations, 11 PerfectInterpolantSequences, 2022/2146 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown