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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label59_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 08:25:47,885 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 08:25:47,887 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 08:25:47,904 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 08:25:47,905 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 08:25:47,907 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 08:25:47,908 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 08:25:47,911 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 08:25:47,913 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 08:25:47,914 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 08:25:47,922 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 08:25:47,923 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 08:25:47,924 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 08:25:47,927 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 08:25:47,929 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 08:25:47,931 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 08:25:47,932 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 08:25:47,938 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 08:25:47,942 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 08:25:47,946 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 08:25:47,947 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 08:25:47,948 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 08:25:47,951 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 08:25:47,951 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 08:25:47,951 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 08:25:47,955 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 08:25:47,956 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 08:25:47,958 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 08:25:47,959 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 08:25:47,960 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 08:25:47,960 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 08:25:47,961 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 08:25:47,966 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 08:25:47,996 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 08:25:47,997 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 08:25:47,998 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 08:25:47,998 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 08:25:47,998 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 08:25:47,998 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 08:25:47,998 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 08:25:48,001 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 08:25:48,001 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 08:25:48,002 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 08:25:48,002 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 08:25:48,002 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 08:25:48,002 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 08:25:48,002 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 08:25:48,003 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 08:25:48,003 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 08:25:48,004 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 08:25:48,004 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 08:25:48,004 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 08:25:48,004 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 08:25:48,004 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 08:25:48,005 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 08:25:48,005 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 08:25:48,005 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 08:25:48,005 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 08:25:48,005 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 08:25:48,007 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:25:48,007 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 08:25:48,008 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 08:25:48,008 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 08:25:48,008 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 08:25:48,008 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 08:25:48,008 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 08:25:48,009 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 08:25:48,009 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 08:25:48,009 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 08:25:48,081 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 08:25:48,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 08:25:48,106 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 08:25:48,107 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 08:25:48,108 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 08:25:48,109 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label59_true-unreach-call.c [2018-11-07 08:25:48,196 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/903f2fddf/064e2c96c10e4e5c9646c8c88d4fd93b/FLAGd87b66272 [2018-11-07 08:25:48,756 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 08:25:48,758 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label59_true-unreach-call.c [2018-11-07 08:25:48,776 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/903f2fddf/064e2c96c10e4e5c9646c8c88d4fd93b/FLAGd87b66272 [2018-11-07 08:25:48,793 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/903f2fddf/064e2c96c10e4e5c9646c8c88d4fd93b [2018-11-07 08:25:48,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 08:25:48,807 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 08:25:48,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 08:25:48,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 08:25:48,815 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 08:25:48,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:25:48" (1/1) ... [2018-11-07 08:25:48,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e69057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:48, skipping insertion in model container [2018-11-07 08:25:48,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:25:48" (1/1) ... [2018-11-07 08:25:48,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 08:25:48,904 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 08:25:49,369 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:25:49,374 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 08:25:49,513 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:25:49,533 INFO L193 MainTranslator]: Completed translation [2018-11-07 08:25:49,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49 WrapperNode [2018-11-07 08:25:49,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 08:25:49,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 08:25:49,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 08:25:49,536 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 08:25:49,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (1/1) ... [2018-11-07 08:25:49,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (1/1) ... [2018-11-07 08:25:49,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 08:25:49,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 08:25:49,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 08:25:49,709 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 08:25:49,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (1/1) ... [2018-11-07 08:25:49,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (1/1) ... [2018-11-07 08:25:49,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (1/1) ... [2018-11-07 08:25:49,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (1/1) ... [2018-11-07 08:25:49,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (1/1) ... [2018-11-07 08:25:49,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (1/1) ... [2018-11-07 08:25:49,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (1/1) ... [2018-11-07 08:25:49,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 08:25:49,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 08:25:49,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 08:25:49,822 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 08:25:49,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:25:49,905 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 08:25:49,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 08:25:49,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 08:25:49,907 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 08:25:49,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 08:25:49,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 08:25:49,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 08:25:49,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 08:25:49,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 08:25:53,063 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 08:25:53,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:25:53 BoogieIcfgContainer [2018-11-07 08:25:53,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 08:25:53,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 08:25:53,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 08:25:53,069 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 08:25:53,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:25:48" (1/3) ... [2018-11-07 08:25:53,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f0f6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:25:53, skipping insertion in model container [2018-11-07 08:25:53,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:49" (2/3) ... [2018-11-07 08:25:53,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f0f6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:25:53, skipping insertion in model container [2018-11-07 08:25:53,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:25:53" (3/3) ... [2018-11-07 08:25:53,073 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label59_true-unreach-call.c [2018-11-07 08:25:53,084 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 08:25:53,092 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 08:25:53,108 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 08:25:53,149 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 08:25:53,150 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 08:25:53,150 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 08:25:53,150 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 08:25:53,150 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 08:25:53,151 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 08:25:53,151 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 08:25:53,151 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 08:25:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-11-07 08:25:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-07 08:25:53,191 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:25:53,193 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] [2018-11-07 08:25:53,196 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:25:53,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:25:53,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1019321972, now seen corresponding path program 1 times [2018-11-07 08:25:53,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:25:53,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:25:53,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:25:53,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:25:53,259 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:25:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:25:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:25:53,868 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:25:53,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:25:53,869 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:25:53,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:25:53,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:25:53,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:25:53,898 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 4 states. [2018-11-07 08:25:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:25:56,414 INFO L93 Difference]: Finished difference Result 737 states and 1298 transitions. [2018-11-07 08:25:56,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:25:56,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2018-11-07 08:25:56,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:25:56,441 INFO L225 Difference]: With dead ends: 737 [2018-11-07 08:25:56,441 INFO L226 Difference]: Without dead ends: 515 [2018-11-07 08:25:56,451 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:25:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-11-07 08:25:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 356. [2018-11-07 08:25:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-11-07 08:25:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 613 transitions. [2018-11-07 08:25:56,563 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 613 transitions. Word has length 72 [2018-11-07 08:25:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:25:56,564 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 613 transitions. [2018-11-07 08:25:56,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:25:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 613 transitions. [2018-11-07 08:25:56,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-07 08:25:56,587 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:25:56,588 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:25:56,588 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:25:56,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:25:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1630388773, now seen corresponding path program 1 times [2018-11-07 08:25:56,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:25:56,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:25:56,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:25:56,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:25:56,593 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:25:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:25:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 57 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:25:57,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:25:57,116 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:25:57,118 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 144 with the following transitions: [2018-11-07 08:25:57,120 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [495], [498], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:25:57,181 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:25:57,181 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:25:58,097 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:25:58,099 INFO L272 AbstractInterpreter]: Visited 79 different actions 223 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 08:25:58,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:25:58,144 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:25:58,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:25:58,145 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:25:58,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:25:58,160 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:25:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:25:58,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:25:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:25:58,526 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:25:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:25:58,930 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:25:58,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2018-11-07 08:25:58,931 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:25:58,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 08:25:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 08:25:58,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 08:25:58,934 INFO L87 Difference]: Start difference. First operand 356 states and 613 transitions. Second operand 3 states. [2018-11-07 08:26:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:26:00,373 INFO L93 Difference]: Finished difference Result 994 states and 1782 transitions. [2018-11-07 08:26:00,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 08:26:00,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2018-11-07 08:26:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:26:00,384 INFO L225 Difference]: With dead ends: 994 [2018-11-07 08:26:00,384 INFO L226 Difference]: Without dead ends: 644 [2018-11-07 08:26:00,388 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 08:26:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2018-11-07 08:26:00,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 644. [2018-11-07 08:26:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2018-11-07 08:26:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1034 transitions. [2018-11-07 08:26:00,432 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1034 transitions. Word has length 143 [2018-11-07 08:26:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:26:00,433 INFO L480 AbstractCegarLoop]: Abstraction has 644 states and 1034 transitions. [2018-11-07 08:26:00,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 08:26:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1034 transitions. [2018-11-07 08:26:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-11-07 08:26:00,439 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:26:00,439 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:26:00,440 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:26:00,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:00,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1733767164, now seen corresponding path program 1 times [2018-11-07 08:26:00,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:26:00,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:00,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:26:00,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:00,442 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:26:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:26:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:26:00,766 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:26:00,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 08:26:00,767 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:26:00,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:26:00,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:26:00,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:26:00,768 INFO L87 Difference]: Start difference. First operand 644 states and 1034 transitions. Second operand 6 states. [2018-11-07 08:26:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:26:03,924 INFO L93 Difference]: Finished difference Result 1847 states and 3197 transitions. [2018-11-07 08:26:03,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 08:26:03,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 154 [2018-11-07 08:26:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:26:03,943 INFO L225 Difference]: With dead ends: 1847 [2018-11-07 08:26:03,944 INFO L226 Difference]: Without dead ends: 1209 [2018-11-07 08:26:03,951 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 08:26:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2018-11-07 08:26:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1185. [2018-11-07 08:26:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2018-11-07 08:26:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1872 transitions. [2018-11-07 08:26:04,037 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1872 transitions. Word has length 154 [2018-11-07 08:26:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:26:04,038 INFO L480 AbstractCegarLoop]: Abstraction has 1185 states and 1872 transitions. [2018-11-07 08:26:04,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:26:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1872 transitions. [2018-11-07 08:26:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-07 08:26:04,048 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:26:04,049 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:26:04,049 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:26:04,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:04,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1561785849, now seen corresponding path program 1 times [2018-11-07 08:26:04,050 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:26:04,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:04,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:26:04,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:04,052 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:26:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:26:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:26:04,294 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:26:04,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:26:04,295 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:26:04,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:26:04,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:26:04,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:26:04,297 INFO L87 Difference]: Start difference. First operand 1185 states and 1872 transitions. Second operand 4 states. [2018-11-07 08:26:05,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:26:05,798 INFO L93 Difference]: Finished difference Result 2364 states and 3744 transitions. [2018-11-07 08:26:05,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:26:05,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 201 [2018-11-07 08:26:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:26:05,806 INFO L225 Difference]: With dead ends: 2364 [2018-11-07 08:26:05,807 INFO L226 Difference]: Without dead ends: 1185 [2018-11-07 08:26:05,813 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:26:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2018-11-07 08:26:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1185. [2018-11-07 08:26:05,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2018-11-07 08:26:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1698 transitions. [2018-11-07 08:26:05,847 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1698 transitions. Word has length 201 [2018-11-07 08:26:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:26:05,847 INFO L480 AbstractCegarLoop]: Abstraction has 1185 states and 1698 transitions. [2018-11-07 08:26:05,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:26:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1698 transitions. [2018-11-07 08:26:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-07 08:26:05,853 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:26:05,853 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:26:05,853 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:26:05,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash -809847816, now seen corresponding path program 1 times [2018-11-07 08:26:05,854 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:26:05,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:05,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:26:05,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:05,855 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:26:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:26:06,135 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 08:26:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:26:06,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:26:06,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 08:26:06,274 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:26:06,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:26:06,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:26:06,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:26:06,275 INFO L87 Difference]: Start difference. First operand 1185 states and 1698 transitions. Second operand 6 states. [2018-11-07 08:26:07,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:26:07,596 INFO L93 Difference]: Finished difference Result 3008 states and 4520 transitions. [2018-11-07 08:26:07,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 08:26:07,597 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2018-11-07 08:26:07,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:26:07,611 INFO L225 Difference]: With dead ends: 3008 [2018-11-07 08:26:07,611 INFO L226 Difference]: Without dead ends: 1829 [2018-11-07 08:26:07,618 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 08:26:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2018-11-07 08:26:07,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1793. [2018-11-07 08:26:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1793 states. [2018-11-07 08:26:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 2543 transitions. [2018-11-07 08:26:07,687 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 2543 transitions. Word has length 204 [2018-11-07 08:26:07,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:26:07,688 INFO L480 AbstractCegarLoop]: Abstraction has 1793 states and 2543 transitions. [2018-11-07 08:26:07,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:26:07,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 2543 transitions. [2018-11-07 08:26:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-11-07 08:26:07,696 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:26:07,696 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:26:07,696 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:26:07,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1298522180, now seen corresponding path program 1 times [2018-11-07 08:26:07,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:26:07,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:07,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:26:07,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:07,698 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:26:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:26:07,968 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 08:26:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 130 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 08:26:08,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:26:08,133 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:26:08,133 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2018-11-07 08:26:08,133 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [494], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [542], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:26:08,141 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:26:08,141 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:26:08,301 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:26:08,301 INFO L272 AbstractInterpreter]: Visited 87 different actions 87 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 08:26:08,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:08,340 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:26:08,788 INFO L227 lantSequenceWeakener]: Weakened 215 states. On average, predicates are now at 73.82% of their original sizes. [2018-11-07 08:26:08,788 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:26:08,915 INFO L415 sIntCurrentIteration]: We unified 223 AI predicates to 223 [2018-11-07 08:26:08,915 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:26:08,916 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:26:08,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-11-07 08:26:08,916 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:26:08,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:26:08,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:26:08,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:26:08,918 INFO L87 Difference]: Start difference. First operand 1793 states and 2543 transitions. Second operand 6 states. [2018-11-07 08:26:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:26:35,008 INFO L93 Difference]: Finished difference Result 3726 states and 5313 transitions. [2018-11-07 08:26:35,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 08:26:35,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 224 [2018-11-07 08:26:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:26:35,018 INFO L225 Difference]: With dead ends: 3726 [2018-11-07 08:26:35,018 INFO L226 Difference]: Without dead ends: 1939 [2018-11-07 08:26:35,025 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 224 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:26:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2018-11-07 08:26:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1937. [2018-11-07 08:26:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2018-11-07 08:26:35,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2695 transitions. [2018-11-07 08:26:35,098 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2695 transitions. Word has length 224 [2018-11-07 08:26:35,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:26:35,098 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 2695 transitions. [2018-11-07 08:26:35,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:26:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2695 transitions. [2018-11-07 08:26:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-11-07 08:26:35,106 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:26:35,107 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:26:35,107 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:26:35,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:35,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1893058164, now seen corresponding path program 1 times [2018-11-07 08:26:35,108 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:26:35,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:35,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:26:35,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:26:35,109 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:26:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:26:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 134 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:26:35,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:26:35,982 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:26:35,982 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 231 with the following transitions: [2018-11-07 08:26:35,983 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:26:35,986 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:26:35,986 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:26:36,156 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:26:36,157 INFO L272 AbstractInterpreter]: Visited 96 different actions 282 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 08:26:36,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:26:36,195 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:26:36,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:26:36,195 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:26:36,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:26:36,213 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:26:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:26:36,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:26:51,165 WARN L179 SmtUtils]: Spent 14.55 s on a formula simplification. DAG size of input: 113 DAG size of output: 48 [2018-11-07 08:26:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 133 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:26:51,338 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:26:51,483 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2018-11-07 08:26:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 133 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:26:51,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:26:51,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2018-11-07 08:26:51,768 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:26:51,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 08:26:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 08:26:51,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-11-07 08:26:51,769 INFO L87 Difference]: Start difference. First operand 1937 states and 2695 transitions. Second operand 12 states. [2018-11-07 08:26:57,721 WARN L179 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2018-11-07 08:27:03,292 WARN L179 SmtUtils]: Spent 5.26 s on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2018-11-07 08:27:13,443 WARN L179 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2018-11-07 08:27:17,614 WARN L179 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2018-11-07 08:27:26,438 WARN L179 SmtUtils]: Spent 8.54 s on a formula simplification that was a NOOP. DAG size: 53 [2018-11-07 08:27:35,562 WARN L179 SmtUtils]: Spent 8.76 s on a formula simplification that was a NOOP. DAG size: 55 [2018-11-07 08:27:52,330 WARN L179 SmtUtils]: Spent 16.63 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2018-11-07 08:28:00,320 WARN L179 SmtUtils]: Spent 7.75 s on a formula simplification. DAG size of input: 61 DAG size of output: 28 [2018-11-07 08:28:03,624 WARN L179 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2018-11-07 08:28:05,669 WARN L179 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2018-11-07 08:28:10,450 WARN L179 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2018-11-07 08:28:12,326 WARN L179 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2018-11-07 08:28:25,274 WARN L179 SmtUtils]: Spent 11.37 s on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2018-11-07 08:28:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:28:26,841 INFO L93 Difference]: Finished difference Result 5680 states and 8469 transitions. [2018-11-07 08:28:26,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-07 08:28:26,841 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 230 [2018-11-07 08:28:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:28:26,870 INFO L225 Difference]: With dead ends: 5680 [2018-11-07 08:28:26,870 INFO L226 Difference]: Without dead ends: 3893 [2018-11-07 08:28:26,892 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 481 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 90.2s TimeCoverageRelationStatistics Valid=736, Invalid=2234, Unknown=0, NotChecked=0, Total=2970 [2018-11-07 08:28:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2018-11-07 08:28:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3784. [2018-11-07 08:28:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2018-11-07 08:28:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 4772 transitions. [2018-11-07 08:28:27,016 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 4772 transitions. Word has length 230 [2018-11-07 08:28:27,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:28:27,017 INFO L480 AbstractCegarLoop]: Abstraction has 3784 states and 4772 transitions. [2018-11-07 08:28:27,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 08:28:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 4772 transitions. [2018-11-07 08:28:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-11-07 08:28:27,027 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:28:27,027 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:28:27,027 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:28:27,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:28:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash -353802736, now seen corresponding path program 1 times [2018-11-07 08:28:27,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:28:27,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:28:27,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:28:27,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:28:27,029 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:28:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:28:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 131 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 08:28:27,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:28:27,331 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:28:27,331 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 235 with the following transitions: [2018-11-07 08:28:27,331 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [542], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:28:27,334 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:28:27,334 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:28:27,478 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:28:27,479 INFO L272 AbstractInterpreter]: Visited 91 different actions 265 times. Merged at 7 different actions 15 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 08:28:27,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:28:27,517 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:28:27,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:28:27,517 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:28:27,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:28:27,531 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:28:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:28:27,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:28:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:28:27,847 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:28:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:28:28,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:28:28,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2018-11-07 08:28:28,129 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:28:28,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 08:28:28,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 08:28:28,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2018-11-07 08:28:28,130 INFO L87 Difference]: Start difference. First operand 3784 states and 4772 transitions. Second operand 11 states. [2018-11-07 08:28:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:28:31,764 INFO L93 Difference]: Finished difference Result 11295 states and 14688 transitions. [2018-11-07 08:28:31,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-07 08:28:31,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 234 [2018-11-07 08:28:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:28:31,784 INFO L225 Difference]: With dead ends: 11295 [2018-11-07 08:28:31,785 INFO L226 Difference]: Without dead ends: 3404 [2018-11-07 08:28:31,837 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 472 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2018-11-07 08:28:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2018-11-07 08:28:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 2528. [2018-11-07 08:28:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2528 states. [2018-11-07 08:28:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 2811 transitions. [2018-11-07 08:28:31,913 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 2811 transitions. Word has length 234 [2018-11-07 08:28:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:28:31,914 INFO L480 AbstractCegarLoop]: Abstraction has 2528 states and 2811 transitions. [2018-11-07 08:28:31,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 08:28:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 2811 transitions. [2018-11-07 08:28:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-11-07 08:28:31,926 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:28:31,926 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:28:31,926 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:28:31,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:28:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash -366661461, now seen corresponding path program 1 times [2018-11-07 08:28:31,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:28:31,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:28:31,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:28:31,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:28:31,929 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:28:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:28:32,712 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2018-11-07 08:28:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 286 proven. 166 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 08:28:32,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:28:32,906 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:28:32,906 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 364 with the following transitions: [2018-11-07 08:28:32,906 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:28:32,910 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:28:32,910 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:28:33,978 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:28:33,978 INFO L272 AbstractInterpreter]: Visited 126 different actions 253 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 08:28:33,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:28:33,983 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:28:33,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:28:33,983 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:28:33,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:28:33,993 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:28:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:28:34,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:28:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 370 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 08:28:34,349 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:28:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 370 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 08:28:34,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:28:34,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 16 [2018-11-07 08:28:34,784 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:28:34,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 08:28:34,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 08:28:34,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-11-07 08:28:34,785 INFO L87 Difference]: Start difference. First operand 2528 states and 2811 transitions. Second operand 15 states. [2018-11-07 08:28:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:28:40,266 INFO L93 Difference]: Finished difference Result 6502 states and 7492 transitions. [2018-11-07 08:28:40,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-07 08:28:40,266 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 363 [2018-11-07 08:28:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:28:40,285 INFO L225 Difference]: With dead ends: 6502 [2018-11-07 08:28:40,285 INFO L226 Difference]: Without dead ends: 4124 [2018-11-07 08:28:40,291 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 750 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=468, Invalid=1982, Unknown=0, NotChecked=0, Total=2450 [2018-11-07 08:28:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2018-11-07 08:28:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 3284. [2018-11-07 08:28:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3284 states. [2018-11-07 08:28:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 3643 transitions. [2018-11-07 08:28:40,391 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 3643 transitions. Word has length 363 [2018-11-07 08:28:40,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:28:40,392 INFO L480 AbstractCegarLoop]: Abstraction has 3284 states and 3643 transitions. [2018-11-07 08:28:40,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 08:28:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 3643 transitions. [2018-11-07 08:28:40,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-11-07 08:28:40,404 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:28:40,405 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:28:40,405 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:28:40,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:28:40,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1827425236, now seen corresponding path program 1 times [2018-11-07 08:28:40,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:28:40,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:28:40,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:28:40,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:28:40,407 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:28:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:28:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 256 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:28:41,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:28:41,389 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:28:41,389 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 405 with the following transitions: [2018-11-07 08:28:41,390 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [754], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 08:28:41,393 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:28:41,393 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:28:41,620 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:28:41,620 INFO L272 AbstractInterpreter]: Visited 145 different actions 435 times. Merged at 8 different actions 23 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 08:28:41,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:28:41,663 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:28:41,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:28:41,664 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:28:41,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:28:41,679 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:28:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:28:41,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:28:46,563 WARN L179 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2018-11-07 08:28:49,975 WARN L179 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 123 DAG size of output: 62 [2018-11-07 08:28:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 168 proven. 208 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-11-07 08:28:50,591 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:28:50,703 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2018-11-07 08:28:50,990 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:52,048 WARN L179 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2018-11-07 08:28:52,054 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:52,151 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:52,429 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:52,585 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:52,641 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:52,847 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:52,918 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:52,981 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:53,058 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:53,186 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:53,278 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:53,337 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:53,391 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:53,447 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:53,679 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:53,812 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:53,886 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:53,978 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,113 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,243 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,299 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,355 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,419 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,486 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,583 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,659 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,718 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,774 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,831 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,905 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:54,964 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,030 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,089 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,148 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,315 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,374 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,433 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,492 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,554 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,612 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,668 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,722 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,792 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,846 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,904 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:55,990 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:56,046 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:56,101 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:56,608 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:56,670 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,019 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,073 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,128 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,185 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,241 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,297 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,365 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,437 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,505 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,578 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,637 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,703 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,758 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,816 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,872 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,928 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:57,986 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:58,322 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:58,375 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:58,435 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:58,491 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:58,552 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:58,611 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:58,668 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:58,729 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:59,089 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:59,145 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:59,205 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:28:59,299 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 08:29:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 370 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-07 08:29:00,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:29:00,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 6] total 28 [2018-11-07 08:29:00,087 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:29:00,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-07 08:29:00,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-07 08:29:00,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=654, Unknown=1, NotChecked=0, Total=756 [2018-11-07 08:29:00,089 INFO L87 Difference]: Start difference. First operand 3284 states and 3643 transitions. Second operand 25 states. [2018-11-07 08:29:03,385 WARN L179 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2018-11-07 08:29:05,190 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2018-11-07 08:29:14,129 WARN L179 SmtUtils]: Spent 7.88 s on a formula simplification. DAG size of input: 114 DAG size of output: 80 [2018-11-07 08:29:16,320 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2018-11-07 08:29:18,640 WARN L179 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2018-11-07 08:29:21,400 WARN L179 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2018-11-07 08:29:24,301 WARN L179 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2018-11-07 08:29:25,926 WARN L179 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2018-11-07 08:29:28,086 WARN L179 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 93 [2018-11-07 08:29:28,932 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2018-11-07 08:29:29,457 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2018-11-07 08:29:35,219 WARN L179 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 129 DAG size of output: 94 [2018-11-07 08:29:36,149 WARN L179 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-11-07 08:29:36,635 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 102 [2018-11-07 08:29:38,234 WARN L179 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 87 DAG size of output: 40 Received shutdown request... [2018-11-07 08:29:53,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-11-07 08:29:53,911 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 08:29:53,919 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 08:29:53,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:29:53 BoogieIcfgContainer [2018-11-07 08:29:53,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 08:29:53,920 INFO L168 Benchmark]: Toolchain (without parser) took 245114.20 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.6 GB in the end (delta: -2.2 GB). Peak memory consumption was 378.6 MB. Max. memory is 7.1 GB. [2018-11-07 08:29:53,921 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. [2018-11-07 08:29:53,922 INFO L168 Benchmark]: CACSL2BoogieTranslator took 725.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-11-07 08:29:53,923 INFO L168 Benchmark]: Boogie Procedure Inliner took 172.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.9 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2018-11-07 08:29:53,923 INFO L168 Benchmark]: Boogie Preprocessor took 113.24 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 08:29:53,924 INFO L168 Benchmark]: RCFGBuilder took 3242.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 107.4 MB). Peak memory consumption was 107.4 MB. Max. memory is 7.1 GB. [2018-11-07 08:29:53,925 INFO L168 Benchmark]: TraceAbstraction took 240854.29 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 3.6 GB in the end (delta: -1.6 GB). Peak memory consumption was 324.2 MB. Max. memory is 7.1 GB. [2018-11-07 08:29:53,930 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 725.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 172.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.9 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.24 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 3242.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 107.4 MB). Peak memory consumption was 107.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 240854.29 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 3.6 GB in the end (delta: -1.6 GB). Peak memory consumption was 324.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 199]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 199). Cancelled while BasicCegarLoop was constructing difference of abstraction (3284states) and FLOYD_HOARE automaton (currently 72 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (3057 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 216 locations, 1 error locations. TIMEOUT Result, 240.7s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 194.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1532 SDtfs, 14452 SDslu, 2435 SDs, 0 SdLazy, 24985 SolverSat, 4086 SolverUnsat, 44 SolverUnknown, 0 SolverNotchecked, 65.5s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 3289 GetRequests, 2944 SyntacticMatches, 98 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5493 ImplicationChecksByTransitivity, 145.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3784occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.9s AbstIntTime, 6 AbstIntIterations, 1 AbstIntStrong, 0.9974753945605966 AbsIntWeakeningRatio, 0.11659192825112108 AbsIntAvgWeakeningVarsNumRemoved, 15.52914798206278 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 9 MinimizatonAttempts, 2046 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 39.8s InterpolantComputationTime, 3603 NumberOfCodeBlocks, 3603 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 4957 ConstructedInterpolants, 173 QuantifiedInterpolants, 11179806 SizeOfPredicates, 9 NumberOfNonLiveVariables, 2268 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 3742/4631 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown