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_label51_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 22:17:17,840 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 22:17:17,847 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 22:17:17,863 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 22:17:17,863 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 22:17:17,864 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 22:17:17,866 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 22:17:17,868 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 22:17:17,869 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 22:17:17,870 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 22:17:17,871 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 22:17:17,871 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 22:17:17,873 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 22:17:17,874 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 22:17:17,875 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 22:17:17,876 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 22:17:17,876 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 22:17:17,878 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 22:17:17,880 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 22:17:17,882 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 22:17:17,883 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 22:17:17,885 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 22:17:17,887 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 22:17:17,900 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 22:17:17,926 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 22:17:17,926 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 22:17:17,928 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 22:17:17,928 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 22:17:17,928 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 22:17:17,928 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 22:17:17,929 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 22:17:17,929 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 22:17:17,929 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 22:17:17,930 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 22:17:17,930 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 22:17:17,930 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 22:17:17,931 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 22:17:17,931 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 22:17:17,931 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 22:17:17,931 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 22:17:17,932 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 22:17:17,934 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 22:17:17,934 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 22:17:17,934 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 22:17:17,934 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 22:17:17,934 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 22:17:17,935 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 22:17:17,935 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 22:17:17,935 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 22:17:17,935 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 22:17:17,936 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 22:17:17,936 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 22:17:17,936 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 22:17:17,936 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 22:17:17,936 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 22:17:17,937 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 22:17:17,937 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 22:17:17,937 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 22:17:18,007 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 22:17:18,022 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 22:17:18,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 22:17:18,028 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 22:17:18,029 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 22:17:18,030 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label51_false-unreach-call.c [2018-10-23 22:17:18,111 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a2cb62845/c8d98329ace644c480d92d7aef9db4d1/FLAGc6cb22206 [2018-10-23 22:17:18,920 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 22:17:18,921 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label51_false-unreach-call.c [2018-10-23 22:17:18,960 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a2cb62845/c8d98329ace644c480d92d7aef9db4d1/FLAGc6cb22206 [2018-10-23 22:17:18,982 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a2cb62845/c8d98329ace644c480d92d7aef9db4d1 [2018-10-23 22:17:18,995 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 22:17:18,997 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 22:17:18,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 22:17:18,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 22:17:19,002 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 22:17:19,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:17:18" (1/1) ... [2018-10-23 22:17:19,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab4c919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:19, skipping insertion in model container [2018-10-23 22:17:19,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:17:18" (1/1) ... [2018-10-23 22:17:19,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 22:17:19,200 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 22:17:20,538 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:17:20,546 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 22:17:21,180 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:17:21,216 INFO L193 MainTranslator]: Completed translation [2018-10-23 22:17:21,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21 WrapperNode [2018-10-23 22:17:21,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 22:17:21,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 22:17:21,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 22:17:21,219 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 22:17:21,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (1/1) ... [2018-10-23 22:17:21,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (1/1) ... [2018-10-23 22:17:21,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 22:17:21,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 22:17:21,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 22:17:21,714 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 22:17:21,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (1/1) ... [2018-10-23 22:17:21,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (1/1) ... [2018-10-23 22:17:21,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (1/1) ... [2018-10-23 22:17:21,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (1/1) ... [2018-10-23 22:17:21,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (1/1) ... [2018-10-23 22:17:21,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (1/1) ... [2018-10-23 22:17:22,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (1/1) ... [2018-10-23 22:17:22,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 22:17:22,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 22:17:22,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 22:17:22,093 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 22:17:22,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (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 22:17:22,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 22:17:22,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 22:17:22,173 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-23 22:17:22,173 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-23 22:17:22,173 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-23 22:17:22,173 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-23 22:17:22,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-23 22:17:22,174 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-23 22:17:22,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-23 22:17:22,174 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-23 22:17:22,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 22:17:22,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 22:17:22,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 22:17:22,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 22:17:34,753 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 22:17:34,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:17:34 BoogieIcfgContainer [2018-10-23 22:17:34,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 22:17:34,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 22:17:34,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 22:17:34,759 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 22:17:34,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:17:18" (1/3) ... [2018-10-23 22:17:34,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b1b51c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:17:34, skipping insertion in model container [2018-10-23 22:17:34,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:17:21" (2/3) ... [2018-10-23 22:17:34,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b1b51c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:17:34, skipping insertion in model container [2018-10-23 22:17:34,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:17:34" (3/3) ... [2018-10-23 22:17:34,762 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label51_false-unreach-call.c [2018-10-23 22:17:34,773 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 22:17:34,783 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 22:17:34,801 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 22:17:34,853 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 22:17:34,853 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 22:17:34,854 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 22:17:34,854 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 22:17:34,854 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 22:17:34,854 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 22:17:34,854 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 22:17:34,855 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 22:17:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-23 22:17:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-23 22:17:34,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:17:34,911 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:17:34,914 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:17:34,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:17:34,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1101804500, now seen corresponding path program 1 times [2018-10-23 22:17:34,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:17:34,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:17:34,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:17:34,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:17:34,977 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:17:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:17:35,347 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:17:35,459 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 22:17:35,465 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:17:35,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 22:17:35,469 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:17:35,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 22:17:35,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 22:17:35,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 22:17:35,501 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-10-23 22:17:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:17:45,583 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-10-23 22:17:45,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 22:17:45,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-10-23 22:17:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:17:45,635 INFO L225 Difference]: With dead ends: 2446 [2018-10-23 22:17:45,636 INFO L226 Difference]: Without dead ends: 1604 [2018-10-23 22:17:45,654 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 [2018-10-23 22:17:45,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-10-23 22:17:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-10-23 22:17:45,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-10-23 22:17:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2909 transitions. [2018-10-23 22:17:45,854 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2909 transitions. Word has length 18 [2018-10-23 22:17:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:17:45,855 INFO L481 AbstractCegarLoop]: Abstraction has 1604 states and 2909 transitions. [2018-10-23 22:17:45,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 22:17:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2909 transitions. [2018-10-23 22:17:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-23 22:17:45,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:17:45,861 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 22:17:45,862 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:17:45,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:17:45,862 INFO L82 PathProgramCache]: Analyzing trace with hash -907006918, now seen corresponding path program 1 times [2018-10-23 22:17:45,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:17:45,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:17:45,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:17:45,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:17:45,864 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:17:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:17:46,211 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:17:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:17:46,424 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:17:46,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 22:17:46,424 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:17:46,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 22:17:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 22:17:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 22:17:46,429 INFO L87 Difference]: Start difference. First operand 1604 states and 2909 transitions. Second operand 5 states. [2018-10-23 22:17:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:17:58,515 INFO L93 Difference]: Finished difference Result 4818 states and 8826 transitions. [2018-10-23 22:17:58,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:17:58,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2018-10-23 22:17:58,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:17:58,547 INFO L225 Difference]: With dead ends: 4818 [2018-10-23 22:17:58,548 INFO L226 Difference]: Without dead ends: 3220 [2018-10-23 22:17:58,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-23 22:17:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2018-10-23 22:17:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3186. [2018-10-23 22:17:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2018-10-23 22:17:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 5594 transitions. [2018-10-23 22:17:58,690 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 5594 transitions. Word has length 92 [2018-10-23 22:17:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:17:58,691 INFO L481 AbstractCegarLoop]: Abstraction has 3186 states and 5594 transitions. [2018-10-23 22:17:58,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 22:17:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 5594 transitions. [2018-10-23 22:17:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-23 22:17:58,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:17:58,696 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 22:17:58,697 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:17:58,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:17:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1469630269, now seen corresponding path program 1 times [2018-10-23 22:17:58,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:17:58,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:17:58,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:17:58,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:17:58,700 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:17:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:17:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:17:58,960 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:17:58,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 22:17:58,961 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:17:58,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 22:17:58,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 22:17:58,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 22:17:58,962 INFO L87 Difference]: Start difference. First operand 3186 states and 5594 transitions. Second operand 5 states. [2018-10-23 22:18:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:18:20,356 INFO L93 Difference]: Finished difference Result 11111 states and 19743 transitions. [2018-10-23 22:18:20,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 22:18:20,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2018-10-23 22:18:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:18:20,414 INFO L225 Difference]: With dead ends: 11111 [2018-10-23 22:18:20,414 INFO L226 Difference]: Without dead ends: 7931 [2018-10-23 22:18:20,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:18:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7931 states. [2018-10-23 22:18:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7931 to 7902. [2018-10-23 22:18:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7902 states. [2018-10-23 22:18:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7902 states to 7902 states and 11698 transitions. [2018-10-23 22:18:20,685 INFO L78 Accepts]: Start accepts. Automaton has 7902 states and 11698 transitions. Word has length 97 [2018-10-23 22:18:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:18:20,685 INFO L481 AbstractCegarLoop]: Abstraction has 7902 states and 11698 transitions. [2018-10-23 22:18:20,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 22:18:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7902 states and 11698 transitions. [2018-10-23 22:18:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-23 22:18:20,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:18:20,699 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 22:18:20,699 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:18:20,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:18:20,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1193444487, now seen corresponding path program 1 times [2018-10-23 22:18:20,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:18:20,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:18:20,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:18:20,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:18:20,703 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:18:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:18:21,047 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:18:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:18:21,203 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:18:21,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 22:18:21,203 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:18:21,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:18:21,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:18:21,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:18:21,204 INFO L87 Difference]: Start difference. First operand 7902 states and 11698 transitions. Second operand 6 states. [2018-10-23 22:18:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:18:30,090 INFO L93 Difference]: Finished difference Result 19204 states and 29087 transitions. [2018-10-23 22:18:30,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:18:30,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2018-10-23 22:18:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:18:30,148 INFO L225 Difference]: With dead ends: 19204 [2018-10-23 22:18:30,148 INFO L226 Difference]: Without dead ends: 11308 [2018-10-23 22:18:30,176 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 22:18:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11308 states. [2018-10-23 22:18:30,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11308 to 11230. [2018-10-23 22:18:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11230 states. [2018-10-23 22:18:30,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11230 states to 11230 states and 15809 transitions. [2018-10-23 22:18:30,457 INFO L78 Accepts]: Start accepts. Automaton has 11230 states and 15809 transitions. Word has length 143 [2018-10-23 22:18:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:18:30,457 INFO L481 AbstractCegarLoop]: Abstraction has 11230 states and 15809 transitions. [2018-10-23 22:18:30,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:18:30,458 INFO L276 IsEmpty]: Start isEmpty. Operand 11230 states and 15809 transitions. [2018-10-23 22:18:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-23 22:18:30,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:18:30,465 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:18:30,466 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:18:30,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:18:30,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1195363482, now seen corresponding path program 1 times [2018-10-23 22:18:30,467 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:18:30,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:18:30,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:18:30,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:18:30,468 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:18:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:18:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:18:30,844 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:18:30,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 22:18:30,845 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:18:30,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 22:18:30,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 22:18:30,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 22:18:30,846 INFO L87 Difference]: Start difference. First operand 11230 states and 15809 transitions. Second operand 5 states. [2018-10-23 22:18:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:18:39,565 INFO L93 Difference]: Finished difference Result 34025 states and 49397 transitions. [2018-10-23 22:18:39,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 22:18:39,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2018-10-23 22:18:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:18:39,663 INFO L225 Difference]: With dead ends: 34025 [2018-10-23 22:18:39,664 INFO L226 Difference]: Without dead ends: 22801 [2018-10-23 22:18:39,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:18:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22801 states. [2018-10-23 22:18:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22801 to 22637. [2018-10-23 22:18:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22637 states. [2018-10-23 22:18:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22637 states to 22637 states and 30350 transitions. [2018-10-23 22:18:40,221 INFO L78 Accepts]: Start accepts. Automaton has 22637 states and 30350 transitions. Word has length 172 [2018-10-23 22:18:40,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:18:40,222 INFO L481 AbstractCegarLoop]: Abstraction has 22637 states and 30350 transitions. [2018-10-23 22:18:40,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 22:18:40,222 INFO L276 IsEmpty]: Start isEmpty. Operand 22637 states and 30350 transitions. [2018-10-23 22:18:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-23 22:18:40,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:18:40,227 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:40,227 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:18:40,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:18:40,228 INFO L82 PathProgramCache]: Analyzing trace with hash -159775001, now seen corresponding path program 1 times [2018-10-23 22:18:40,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:18:40,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:18:40,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:18:40,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:18:40,229 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:18:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:18:40,596 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:18:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:18:41,022 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:18:41,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 22:18:41,023 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:18:41,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:18:41,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:18:41,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:18:41,024 INFO L87 Difference]: Start difference. First operand 22637 states and 30350 transitions. Second operand 6 states. [2018-10-23 22:18:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:18:55,053 INFO L93 Difference]: Finished difference Result 59145 states and 81641 transitions. [2018-10-23 22:18:55,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:18:55,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 223 [2018-10-23 22:18:55,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:18:55,226 INFO L225 Difference]: With dead ends: 59145 [2018-10-23 22:18:55,226 INFO L226 Difference]: Without dead ends: 36514 [2018-10-23 22:18:55,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 22:18:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36514 states. [2018-10-23 22:18:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36514 to 36339. [2018-10-23 22:18:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36339 states. [2018-10-23 22:18:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36339 states to 36339 states and 46470 transitions. [2018-10-23 22:18:56,082 INFO L78 Accepts]: Start accepts. Automaton has 36339 states and 46470 transitions. Word has length 223 [2018-10-23 22:18:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:18:56,083 INFO L481 AbstractCegarLoop]: Abstraction has 36339 states and 46470 transitions. [2018-10-23 22:18:56,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:18:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 36339 states and 46470 transitions. [2018-10-23 22:18:56,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-23 22:18:56,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:18:56,089 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:18:56,090 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:18:56,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:18:56,090 INFO L82 PathProgramCache]: Analyzing trace with hash 388716413, now seen corresponding path program 1 times [2018-10-23 22:18:56,090 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:18:56,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:18:56,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:18:56,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:18:56,092 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:18:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:18:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-10-23 22:18:56,351 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:18:56,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:18:56,351 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:18:56,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:18:56,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:18:56,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:18:56,353 INFO L87 Difference]: Start difference. First operand 36339 states and 46470 transitions. Second operand 4 states. [2018-10-23 22:19:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:19:04,558 INFO L93 Difference]: Finished difference Result 97409 states and 125977 transitions. [2018-10-23 22:19:04,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:19:04,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2018-10-23 22:19:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:19:04,743 INFO L225 Difference]: With dead ends: 97409 [2018-10-23 22:19:04,744 INFO L226 Difference]: Without dead ends: 52336 [2018-10-23 22:19:04,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:19:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52336 states. [2018-10-23 22:19:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52336 to 52272. [2018-10-23 22:19:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52272 states. [2018-10-23 22:19:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52272 states to 52272 states and 62104 transitions. [2018-10-23 22:19:05,783 INFO L78 Accepts]: Start accepts. Automaton has 52272 states and 62104 transitions. Word has length 241 [2018-10-23 22:19:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:19:05,784 INFO L481 AbstractCegarLoop]: Abstraction has 52272 states and 62104 transitions. [2018-10-23 22:19:05,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:19:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 52272 states and 62104 transitions. [2018-10-23 22:19:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-10-23 22:19:05,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:19:05,796 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 22:19:05,796 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:19:05,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:19:05,797 INFO L82 PathProgramCache]: Analyzing trace with hash -560449152, now seen corresponding path program 1 times [2018-10-23 22:19:05,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:19:05,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:19:05,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:19:05,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:19:05,798 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:19:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:19:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:19:07,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:19:07,039 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:19:07,041 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 359 with the following transitions: [2018-10-23 22:19:07,047 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1911], [1913], [1916], [1924], [1932], [1940], [1948], [1956], [1964], [1972], [1980], [1988], [1996], [2004], [2012], [2020], [2028], [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], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2569], [2573], [2577], [2581], [2585], [2589], [2593], [2597], [2601], [2605], [2609], [2613], [2617], [2621], [2625], [2629], [2633], [2637], [2641], [2645], [2649], [2653], [2657], [2661], [2665], [2669], [2673], [2676], [2677], [2681], [2685], [2689], [2693], [2697], [2701], [2705], [2709], [2713], [2717], [2721], [2725], [2729], [2733], [2737], [2741], [2745], [2749], [2753], [2757], [2761], [2765], [2769], [2773], [2777], [2781], [2785], [2789], [2793], [2797], [2801], [2805], [2809], [2813], [2817], [2821], [2825], [2829], [2833], [2837], [2841], [2844], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-23 22:19:07,170 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:19:07,170 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:19:12,878 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:19:15,111 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 22:19:15,113 INFO L272 AbstractInterpreter]: Visited 196 different actions 196 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-23 22:19:15,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:19:15,156 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 22:19:19,327 INFO L232 lantSequenceWeakener]: Weakened 350 states. On average, predicates are now at 75.02% of their original sizes. [2018-10-23 22:19:19,327 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 22:19:20,218 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 22:19:20,219 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:19:20,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-10-23 22:19:20,219 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:19:20,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 22:19:20,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 22:19:20,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-23 22:19:20,221 INFO L87 Difference]: Start difference. First operand 52272 states and 62104 transitions. Second operand 9 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown