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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label42_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 22:15:47,888 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 22:15:47,891 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 22:15:47,909 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 22:15:47,910 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 22:15:47,911 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 22:15:47,913 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 22:15:47,916 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 22:15:47,919 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 22:15:47,920 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 22:15:47,927 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 22:15:47,927 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 22:15:47,931 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 22:15:47,934 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 22:15:47,935 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 22:15:47,938 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 22:15:47,939 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 22:15:47,941 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 22:15:47,945 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 22:15:47,950 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 22:15:47,953 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 22:15:47,954 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 22:15:47,957 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 22:15:47,972 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 22:15:48,005 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 22:15:48,005 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 22:15:48,006 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 22:15:48,006 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 22:15:48,006 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 22:15:48,007 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 22:15:48,007 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 22:15:48,007 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 22:15:48,008 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 22:15:48,008 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 22:15:48,008 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 22:15:48,008 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 22:15:48,009 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 22:15:48,010 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 22:15:48,010 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 22:15:48,010 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 22:15:48,010 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 22:15:48,010 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 22:15:48,011 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 22:15:48,011 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 22:15:48,011 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 22:15:48,011 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 22:15:48,012 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 22:15:48,014 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 22:15:48,014 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 22:15:48,014 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 22:15:48,014 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 22:15:48,014 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 22:15:48,015 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 22:15:48,015 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 22:15:48,015 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 22:15:48,015 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 22:15:48,015 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 22:15:48,016 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 22:15:48,085 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 22:15:48,106 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 22:15:48,110 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 22:15:48,112 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 22:15:48,112 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 22:15:48,113 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label42_false-unreach-call.c [2018-10-23 22:15:48,186 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/049db9b43/615951969b2141f689358e6b6334f9ba/FLAG34ea3bb0e [2018-10-23 22:15:48,972 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 22:15:48,974 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label42_false-unreach-call.c [2018-10-23 22:15:49,010 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/049db9b43/615951969b2141f689358e6b6334f9ba/FLAG34ea3bb0e [2018-10-23 22:15:49,028 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/049db9b43/615951969b2141f689358e6b6334f9ba [2018-10-23 22:15:49,043 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 22:15:49,045 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 22:15:49,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 22:15:49,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 22:15:49,051 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 22:15:49,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:15:49" (1/1) ... [2018-10-23 22:15:49,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ef999f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:49, skipping insertion in model container [2018-10-23 22:15:49,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:15:49" (1/1) ... [2018-10-23 22:15:49,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 22:15:49,225 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 22:15:50,560 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:15:50,566 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 22:15:51,339 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:15:51,377 INFO L193 MainTranslator]: Completed translation [2018-10-23 22:15:51,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51 WrapperNode [2018-10-23 22:15:51,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 22:15:51,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 22:15:51,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 22:15:51,379 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 22:15:51,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (1/1) ... [2018-10-23 22:15:51,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (1/1) ... [2018-10-23 22:15:51,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 22:15:51,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 22:15:51,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 22:15:51,921 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 22:15:51,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (1/1) ... [2018-10-23 22:15:51,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (1/1) ... [2018-10-23 22:15:51,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (1/1) ... [2018-10-23 22:15:51,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (1/1) ... [2018-10-23 22:15:52,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (1/1) ... [2018-10-23 22:15:52,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (1/1) ... [2018-10-23 22:15:52,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (1/1) ... [2018-10-23 22:15:52,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 22:15:52,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 22:15:52,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 22:15:52,248 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 22:15:52,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (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 [2018-10-23 22:15:52,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 22:15:52,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 22:15:52,326 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-23 22:15:52,326 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-23 22:15:52,327 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-23 22:15:52,327 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-23 22:15:52,327 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-23 22:15:52,327 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-23 22:15:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-23 22:15:52,328 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-23 22:15:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 22:15:52,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 22:15:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 22:15:52,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 22:16:05,882 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 22:16:05,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:16:05 BoogieIcfgContainer [2018-10-23 22:16:05,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 22:16:05,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 22:16:05,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 22:16:05,889 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 22:16:05,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:15:49" (1/3) ... [2018-10-23 22:16:05,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea0fa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:16:05, skipping insertion in model container [2018-10-23 22:16:05,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:15:51" (2/3) ... [2018-10-23 22:16:05,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea0fa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:16:05, skipping insertion in model container [2018-10-23 22:16:05,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:16:05" (3/3) ... [2018-10-23 22:16:05,893 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label42_false-unreach-call.c [2018-10-23 22:16:05,904 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 22:16:05,915 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 22:16:05,936 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 22:16:05,989 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 22:16:05,989 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 22:16:05,989 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 22:16:05,989 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 22:16:05,989 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 22:16:05,990 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 22:16:05,990 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 22:16:05,990 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 22:16:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-23 22:16:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-23 22:16:06,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:16:06,047 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] [2018-10-23 22:16:06,049 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:16:06,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:16:06,055 INFO L82 PathProgramCache]: Analyzing trace with hash -206959357, now seen corresponding path program 1 times [2018-10-23 22:16:06,057 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:16:06,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:16:06,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:16:06,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:16:06,115 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:16:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:16:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:16:06,521 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:16:06,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:16:06,522 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:16:06,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:16:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:16:06,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:16:06,549 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 4 states. [2018-10-23 22:16:21,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:16:21,391 INFO L93 Difference]: Finished difference Result 3234 states and 6255 transitions. [2018-10-23 22:16:21,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:16:21,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-10-23 22:16:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:16:21,436 INFO L225 Difference]: With dead ends: 3234 [2018-10-23 22:16:21,436 INFO L226 Difference]: Without dead ends: 2388 [2018-10-23 22:16:21,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:16:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2018-10-23 22:16:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 2388. [2018-10-23 22:16:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2388 states. [2018-10-23 22:16:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 3845 transitions. [2018-10-23 22:16:21,666 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 3845 transitions. Word has length 33 [2018-10-23 22:16:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:16:21,666 INFO L481 AbstractCegarLoop]: Abstraction has 2388 states and 3845 transitions. [2018-10-23 22:16:21,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:16:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 3845 transitions. [2018-10-23 22:16:21,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-23 22:16:21,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:16:21,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:16:21,676 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:16:21,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:16:21,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1266626407, now seen corresponding path program 1 times [2018-10-23 22:16:21,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:16:21,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:16:21,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:16:21,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:16:21,680 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:16:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:16:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:16:22,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:16:22,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 22:16:22,028 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:16:22,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:16:22,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:16:22,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:16:22,031 INFO L87 Difference]: Start difference. First operand 2388 states and 3845 transitions. Second operand 6 states. [2018-10-23 22:16:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:16:38,966 INFO L93 Difference]: Finished difference Result 9463 states and 15573 transitions. [2018-10-23 22:16:38,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:16:38,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2018-10-23 22:16:38,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:16:39,011 INFO L225 Difference]: With dead ends: 9463 [2018-10-23 22:16:39,012 INFO L226 Difference]: Without dead ends: 7081 [2018-10-23 22:16:39,026 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 [2018-10-23 22:16:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2018-10-23 22:16:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 7037. [2018-10-23 22:16:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7037 states. [2018-10-23 22:16:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 10229 transitions. [2018-10-23 22:16:39,239 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 10229 transitions. Word has length 114 [2018-10-23 22:16:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:16:39,239 INFO L481 AbstractCegarLoop]: Abstraction has 7037 states and 10229 transitions. [2018-10-23 22:16:39,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:16:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 10229 transitions. [2018-10-23 22:16:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-23 22:16:39,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:16:39,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:16:39,251 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:16:39,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:16:39,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1753618293, now seen corresponding path program 1 times [2018-10-23 22:16:39,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:16:39,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:16:39,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:16:39,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:16:39,253 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:16:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:16:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:16:39,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:16:39,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 22:16:39,648 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:16:39,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:16:39,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:16:39,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:16:39,650 INFO L87 Difference]: Start difference. First operand 7037 states and 10229 transitions. Second operand 6 states. [2018-10-23 22:16:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:16:47,411 INFO L93 Difference]: Finished difference Result 19057 states and 29212 transitions. [2018-10-23 22:16:47,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:16:47,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2018-10-23 22:16:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:16:47,476 INFO L225 Difference]: With dead ends: 19057 [2018-10-23 22:16:47,477 INFO L226 Difference]: Without dead ends: 12026 [2018-10-23 22:16:47,504 INFO L605 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 [2018-10-23 22:16:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2018-10-23 22:16:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 11931. [2018-10-23 22:16:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11931 states. [2018-10-23 22:16:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11931 states to 11931 states and 17450 transitions. [2018-10-23 22:16:47,852 INFO L78 Accepts]: Start accepts. Automaton has 11931 states and 17450 transitions. Word has length 144 [2018-10-23 22:16:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:16:47,853 INFO L481 AbstractCegarLoop]: Abstraction has 11931 states and 17450 transitions. [2018-10-23 22:16:47,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:16:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 11931 states and 17450 transitions. [2018-10-23 22:16:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-23 22:16:47,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:16:47,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:16:47,857 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:16:47,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:16:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash -988321524, now seen corresponding path program 1 times [2018-10-23 22:16:47,858 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:16:47,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:16:47,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:16:47,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:16:47,859 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:16:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:16:48,176 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:16:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:16:48,325 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:16:48,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 22:16:48,326 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:16:48,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:16:48,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:16:48,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:16:48,327 INFO L87 Difference]: Start difference. First operand 11931 states and 17450 transitions. Second operand 6 states. [2018-10-23 22:17:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:17:06,664 INFO L93 Difference]: Finished difference Result 37661 states and 58072 transitions. [2018-10-23 22:17:06,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:17:06,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2018-10-23 22:17:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:17:06,805 INFO L225 Difference]: With dead ends: 37661 [2018-10-23 22:17:06,805 INFO L226 Difference]: Without dead ends: 25736 [2018-10-23 22:17:06,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 22:17:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25736 states. [2018-10-23 22:17:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25736 to 25635. [2018-10-23 22:17:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25635 states. [2018-10-23 22:17:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25635 states to 25635 states and 38010 transitions. [2018-10-23 22:17:07,574 INFO L78 Accepts]: Start accepts. Automaton has 25635 states and 38010 transitions. Word has length 147 [2018-10-23 22:17:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:17:07,575 INFO L481 AbstractCegarLoop]: Abstraction has 25635 states and 38010 transitions. [2018-10-23 22:17:07,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:17:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 25635 states and 38010 transitions. [2018-10-23 22:17:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-23 22:17:07,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:17:07,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:17:07,583 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:17:07,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:17:07,584 INFO L82 PathProgramCache]: Analyzing trace with hash 649593825, now seen corresponding path program 1 times [2018-10-23 22:17:07,587 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:17:07,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:17:07,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:17:07,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:17:07,588 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:17:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:17:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:17:08,097 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:17:08,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:17:08,098 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:17:08,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:17:08,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:17:08,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:17:08,099 INFO L87 Difference]: Start difference. First operand 25635 states and 38010 transitions. Second operand 4 states. [2018-10-23 22:17:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:17:23,967 INFO L93 Difference]: Finished difference Result 76817 states and 117652 transitions. [2018-10-23 22:17:23,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:17:23,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2018-10-23 22:17:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:17:24,188 INFO L225 Difference]: With dead ends: 76817 [2018-10-23 22:17:24,188 INFO L226 Difference]: Without dead ends: 51188 [2018-10-23 22:17:24,276 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 [2018-10-23 22:17:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51188 states. [2018-10-23 22:17:25,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51188 to 51178. [2018-10-23 22:17:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51178 states. [2018-10-23 22:17:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51178 states to 51178 states and 71067 transitions. [2018-10-23 22:17:25,675 INFO L78 Accepts]: Start accepts. Automaton has 51178 states and 71067 transitions. Word has length 182 [2018-10-23 22:17:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:17:25,675 INFO L481 AbstractCegarLoop]: Abstraction has 51178 states and 71067 transitions. [2018-10-23 22:17:25,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:17:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 51178 states and 71067 transitions. [2018-10-23 22:17:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-23 22:17:25,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:17:25,697 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 22:17:25,697 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:17:25,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:17:25,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1136426607, now seen corresponding path program 1 times [2018-10-23 22:17:25,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:17:25,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:17:25,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:17:25,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:17:25,699 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:17:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:17:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 52 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-23 22:17:26,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:17:26,078 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:17:26,079 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 250 with the following transitions: [2018-10-23 22:17:26,083 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2031], [2033], [2036], [2044], [2052], [2060], [2068], [2076], [2084], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2500], [2501], [2505], [2509], [2513], [2517], [2521], [2524], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-23 22:17:26,171 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:17:26,172 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:17:31,203 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:17:33,100 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 22:17:33,102 INFO L272 AbstractInterpreter]: Visited 116 different actions 116 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-23 22:17:33,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:17:33,139 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 22:17:36,553 INFO L232 lantSequenceWeakener]: Weakened 241 states. On average, predicates are now at 75.29% of their original sizes. [2018-10-23 22:17:36,553 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 22:17:37,172 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 22:17:37,173 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:17:37,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2018-10-23 22:17:37,174 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:17:37,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 22:17:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 22:17:37,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-23 22:17:37,175 INFO L87 Difference]: Start difference. First operand 51178 states and 71067 transitions. Second operand 8 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown