java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label55_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:20:31,826 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:20:31,828 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:20:31,842 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:20:31,842 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:20:31,843 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:20:31,844 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:20:31,846 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:20:31,849 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:20:31,850 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:20:31,851 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:20:31,852 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:20:31,853 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:20:31,855 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:20:31,859 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:20:31,860 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:20:31,863 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:20:31,865 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:20:31,870 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:20:31,873 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:20:31,875 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:20:31,878 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:20:31,881 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 14:20:31,894 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:20:31,894 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:20:31,897 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:20:31,897 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:20:31,898 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 14:20:31,925 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:20:31,925 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:20:31,927 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:20:31,927 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:20:31,927 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:20:31,927 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:20:31,928 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:20:31,928 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:20:31,928 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:20:31,928 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:20:31,928 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:20:31,928 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:20:31,929 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:20:31,930 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:20:31,930 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:20:31,930 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:20:31,930 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:20:31,930 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:20:31,931 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:20:31,932 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:20:31,932 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:20:31,932 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:20:31,932 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:20:31,932 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:20:31,933 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:20:31,933 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:20:31,933 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:20:31,933 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:20:31,934 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:20:31,934 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:20:31,934 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:20:31,934 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:20:31,934 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:20:31,935 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:20:31,987 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:20:31,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:20:32,003 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:20:32,005 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:20:32,005 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:20:32,006 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label55_true-unreach-call.c [2018-10-27 14:20:32,061 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2468c8cf8/cec5b18fa77b4e4bbbb2cbc6726888bc/FLAG0850729e6 [2018-10-27 14:20:32,845 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:20:32,845 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label55_true-unreach-call.c [2018-10-27 14:20:32,889 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2468c8cf8/cec5b18fa77b4e4bbbb2cbc6726888bc/FLAG0850729e6 [2018-10-27 14:20:32,909 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2468c8cf8/cec5b18fa77b4e4bbbb2cbc6726888bc [2018-10-27 14:20:32,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:20:32,926 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:20:32,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:20:32,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:20:32,933 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:20:32,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:20:32" (1/1) ... [2018-10-27 14:20:32,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255ba5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:32, skipping insertion in model container [2018-10-27 14:20:32,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:20:32" (1/1) ... [2018-10-27 14:20:32,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:20:33,141 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:20:34,538 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:20:34,543 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:20:35,322 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:20:35,364 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:20:35,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35 WrapperNode [2018-10-27 14:20:35,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:20:35,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:20:35,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:20:35,366 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:20:35,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (1/1) ... [2018-10-27 14:20:35,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (1/1) ... [2018-10-27 14:20:35,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:20:35,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:20:35,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:20:35,965 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:20:35,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (1/1) ... [2018-10-27 14:20:35,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (1/1) ... [2018-10-27 14:20:36,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (1/1) ... [2018-10-27 14:20:36,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (1/1) ... [2018-10-27 14:20:36,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (1/1) ... [2018-10-27 14:20:36,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (1/1) ... [2018-10-27 14:20:36,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (1/1) ... [2018-10-27 14:20:36,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:20:36,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:20:36,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:20:36,273 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:20:36,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:20:36,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:20:36,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:20:36,346 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 14:20:36,346 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 14:20:36,346 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 14:20:36,346 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 14:20:36,346 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 14:20:36,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 14:20:36,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:20:36,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:20:36,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:20:36,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:20:36,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:20:36,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:20:46,739 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:20:46,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:20:46 BoogieIcfgContainer [2018-10-27 14:20:46,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:20:46,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:20:46,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:20:46,745 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:20:46,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:20:32" (1/3) ... [2018-10-27 14:20:46,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc44db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:20:46, skipping insertion in model container [2018-10-27 14:20:46,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:35" (2/3) ... [2018-10-27 14:20:46,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc44db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:20:46, skipping insertion in model container [2018-10-27 14:20:46,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:20:46" (3/3) ... [2018-10-27 14:20:46,749 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label55_true-unreach-call.c [2018-10-27 14:20:46,759 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:20:46,769 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:20:46,786 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:20:46,836 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:20:46,836 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:20:46,837 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:20:46,837 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:20:46,837 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:20:46,837 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:20:46,837 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:20:46,837 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:20:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-10-27 14:20:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-27 14:20:46,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:20:46,893 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] [2018-10-27 14:20:46,896 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:20:46,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:20:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash -661106381, now seen corresponding path program 1 times [2018-10-27 14:20:46,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:20:46,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:20:46,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:20:46,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:20:46,959 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:20:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:20:47,432 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:20:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:20:47,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:20:47,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 14:20:47,560 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:20:47,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 14:20:47,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 14:20:47,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 14:20:47,610 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 3 states. [2018-10-27 14:20:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:20:56,418 INFO L93 Difference]: Finished difference Result 3097 states and 5707 transitions. [2018-10-27 14:20:56,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 14:20:56,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2018-10-27 14:20:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:20:56,461 INFO L225 Difference]: With dead ends: 3097 [2018-10-27 14:20:56,461 INFO L226 Difference]: Without dead ends: 1975 [2018-10-27 14:20:56,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 14:20:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2018-10-27 14:20:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1974. [2018-10-27 14:20:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1974 states. [2018-10-27 14:20:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 3284 transitions. [2018-10-27 14:20:56,670 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 3284 transitions. Word has length 55 [2018-10-27 14:20:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:20:56,671 INFO L481 AbstractCegarLoop]: Abstraction has 1974 states and 3284 transitions. [2018-10-27 14:20:56,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 14:20:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 3284 transitions. [2018-10-27 14:20:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-27 14:20:56,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:20:56,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:20:56,685 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:20:56,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:20:56,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1569430114, now seen corresponding path program 1 times [2018-10-27 14:20:56,685 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:20:56,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:20:56,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:20:56,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:20:56,687 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:20:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:20:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:20:56,986 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:20:56,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:20:56,986 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:20:56,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:20:56,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:20:56,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:20:56,989 INFO L87 Difference]: Start difference. First operand 1974 states and 3284 transitions. Second operand 5 states. [2018-10-27 14:21:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:21:18,129 INFO L93 Difference]: Finished difference Result 5737 states and 9691 transitions. [2018-10-27 14:21:18,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 14:21:18,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2018-10-27 14:21:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:21:18,160 INFO L225 Difference]: With dead ends: 5737 [2018-10-27 14:21:18,161 INFO L226 Difference]: Without dead ends: 3769 [2018-10-27 14:21:18,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:21:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2018-10-27 14:21:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3685. [2018-10-27 14:21:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3685 states. [2018-10-27 14:21:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3685 states to 3685 states and 5659 transitions. [2018-10-27 14:21:18,305 INFO L78 Accepts]: Start accepts. Automaton has 3685 states and 5659 transitions. Word has length 131 [2018-10-27 14:21:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:21:18,306 INFO L481 AbstractCegarLoop]: Abstraction has 3685 states and 5659 transitions. [2018-10-27 14:21:18,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:21:18,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3685 states and 5659 transitions. [2018-10-27 14:21:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-27 14:21:18,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:21:18,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:21:18,323 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:21:18,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:21:18,323 INFO L82 PathProgramCache]: Analyzing trace with hash -265518658, now seen corresponding path program 1 times [2018-10-27 14:21:18,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:21:18,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:21:18,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:21:18,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:21:18,326 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:21:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:21:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:21:18,620 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:21:18,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:21:18,620 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:21:18,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:21:18,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:21:18,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:21:18,622 INFO L87 Difference]: Start difference. First operand 3685 states and 5659 transitions. Second operand 5 states. [2018-10-27 14:21:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:21:42,258 INFO L93 Difference]: Finished difference Result 13664 states and 21759 transitions. [2018-10-27 14:21:42,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 14:21:42,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2018-10-27 14:21:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:21:42,321 INFO L225 Difference]: With dead ends: 13664 [2018-10-27 14:21:42,322 INFO L226 Difference]: Without dead ends: 9985 [2018-10-27 14:21:42,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:21:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9985 states. [2018-10-27 14:21:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9985 to 9795. [2018-10-27 14:21:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9795 states. [2018-10-27 14:21:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9795 states to 9795 states and 14500 transitions. [2018-10-27 14:21:42,626 INFO L78 Accepts]: Start accepts. Automaton has 9795 states and 14500 transitions. Word has length 145 [2018-10-27 14:21:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:21:42,627 INFO L481 AbstractCegarLoop]: Abstraction has 9795 states and 14500 transitions. [2018-10-27 14:21:42,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:21:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 9795 states and 14500 transitions. [2018-10-27 14:21:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-27 14:21:42,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:21:42,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:21:42,639 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:21:42,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:21:42,640 INFO L82 PathProgramCache]: Analyzing trace with hash -507392094, now seen corresponding path program 1 times [2018-10-27 14:21:42,640 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:21:42,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:21:42,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:21:42,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:21:42,642 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:21:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:21:42,937 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:21:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:21:43,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:21:43,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:21:43,030 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:21:43,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:21:43,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:21:43,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:21:43,032 INFO L87 Difference]: Start difference. First operand 9795 states and 14500 transitions. Second operand 6 states. [2018-10-27 14:21:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:21:58,327 INFO L93 Difference]: Finished difference Result 34191 states and 53804 transitions. [2018-10-27 14:21:58,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:21:58,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2018-10-27 14:21:58,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:21:58,443 INFO L225 Difference]: With dead ends: 34191 [2018-10-27 14:21:58,444 INFO L226 Difference]: Without dead ends: 24402 [2018-10-27 14:21:58,518 INFO L605 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 [2018-10-27 14:21:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24402 states. [2018-10-27 14:21:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24402 to 24169. [2018-10-27 14:21:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24169 states. [2018-10-27 14:21:59,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24169 states to 24169 states and 34071 transitions. [2018-10-27 14:21:59,133 INFO L78 Accepts]: Start accepts. Automaton has 24169 states and 34071 transitions. Word has length 163 [2018-10-27 14:21:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:21:59,134 INFO L481 AbstractCegarLoop]: Abstraction has 24169 states and 34071 transitions. [2018-10-27 14:21:59,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:21:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24169 states and 34071 transitions. [2018-10-27 14:21:59,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-27 14:21:59,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:21:59,142 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:21:59,142 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:21:59,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:21:59,143 INFO L82 PathProgramCache]: Analyzing trace with hash -698990030, now seen corresponding path program 1 times [2018-10-27 14:21:59,143 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:21:59,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:21:59,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:21:59,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:21:59,144 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:21:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:21:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:21:59,409 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:21:59,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:21:59,409 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:21:59,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:21:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:21:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:21:59,413 INFO L87 Difference]: Start difference. First operand 24169 states and 34071 transitions. Second operand 4 states. [2018-10-27 14:22:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:22:12,304 INFO L93 Difference]: Finished difference Result 66649 states and 99957 transitions. [2018-10-27 14:22:12,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:22:12,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2018-10-27 14:22:12,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:22:12,497 INFO L225 Difference]: With dead ends: 66649 [2018-10-27 14:22:12,497 INFO L226 Difference]: Without dead ends: 42486 [2018-10-27 14:22:12,568 INFO L605 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 [2018-10-27 14:22:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42486 states. [2018-10-27 14:22:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42486 to 42433. [2018-10-27 14:22:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42433 states. [2018-10-27 14:22:13,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42433 states to 42433 states and 60054 transitions. [2018-10-27 14:22:13,682 INFO L78 Accepts]: Start accepts. Automaton has 42433 states and 60054 transitions. Word has length 171 [2018-10-27 14:22:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:22:13,683 INFO L481 AbstractCegarLoop]: Abstraction has 42433 states and 60054 transitions. [2018-10-27 14:22:13,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:22:13,683 INFO L276 IsEmpty]: Start isEmpty. Operand 42433 states and 60054 transitions. [2018-10-27 14:22:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-27 14:22:13,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:22:13,709 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, 2, 2, 2, 2, 2, 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] [2018-10-27 14:22:13,709 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:22:13,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:22:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1869313388, now seen corresponding path program 1 times [2018-10-27 14:22:13,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:22:13,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:22:13,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:22:13,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:22:13,711 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:22:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:22:14,020 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:22:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 96 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:22:14,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:22:14,463 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:22:14,464 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-10-27 14:22:14,467 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2967], [2969], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3155], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3336], [3341], [3343], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-10-27 14:22:14,544 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:22:14,544 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:22:15,370 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:22:15,372 INFO L272 AbstractInterpreter]: Visited 122 different actions 122 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-27 14:22:15,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:22:15,416 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:22:16,346 INFO L227 lantSequenceWeakener]: Weakened 227 states. On average, predicates are now at 71.61% of their original sizes. [2018-10-27 14:22:16,348 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:22:17,040 INFO L415 sIntCurrentIteration]: We unified 250 AI predicates to 250 [2018-10-27 14:22:17,040 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:22:17,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:22:17,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-10-27 14:22:17,041 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:22:17,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 14:22:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 14:22:17,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-10-27 14:22:17,043 INFO L87 Difference]: Start difference. First operand 42433 states and 60054 transitions. Second operand 10 states. [2018-10-27 14:22:24,193 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown