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/Problem03_label09_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 17:19:23,462 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 17:19:23,466 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 17:19:23,481 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 17:19:23,482 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 17:19:23,483 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 17:19:23,484 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 17:19:23,485 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 17:19:23,487 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 17:19:23,488 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 17:19:23,489 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 17:19:23,489 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 17:19:23,490 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 17:19:23,493 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 17:19:23,499 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 17:19:23,500 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 17:19:23,501 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 17:19:23,505 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 17:19:23,510 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 17:19:23,511 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 17:19:23,512 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 17:19:23,517 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 17:19:23,523 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 17:19:23,533 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 [2018-10-24 17:19:23,553 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 17:19:23,554 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 17:19:23,554 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 17:19:23,555 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 17:19:23,555 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 17:19:23,555 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 17:19:23,555 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 17:19:23,555 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 17:19:23,556 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 17:19:23,556 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 17:19:23,556 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 17:19:23,556 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 17:19:23,557 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 17:19:23,557 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 17:19:23,557 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 17:19:23,557 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 17:19:23,558 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 17:19:23,558 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 17:19:23,558 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 17:19:23,558 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 17:19:23,558 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 17:19:23,559 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 17:19:23,559 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 17:19:23,559 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 17:19:23,559 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 17:19:23,559 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 17:19:23,560 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 17:19:23,560 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 17:19:23,560 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 17:19:23,560 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 17:19:23,560 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 17:19:23,560 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 17:19:23,561 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 17:19:23,561 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 17:19:23,621 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 17:19:23,637 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 17:19:23,641 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 17:19:23,643 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 17:19:23,643 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 17:19:23,644 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label09_false-unreach-call.c [2018-10-24 17:19:23,709 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2cb7efe58/622a6f94c4df4dc29bfeb130ff060404/FLAG8a0a3c6aa [2018-10-24 17:19:24,408 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 17:19:24,409 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label09_false-unreach-call.c [2018-10-24 17:19:24,425 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2cb7efe58/622a6f94c4df4dc29bfeb130ff060404/FLAG8a0a3c6aa [2018-10-24 17:19:24,440 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2cb7efe58/622a6f94c4df4dc29bfeb130ff060404 [2018-10-24 17:19:24,451 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 17:19:24,453 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 17:19:24,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 17:19:24,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 17:19:24,458 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 17:19:24,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 05:19:24" (1/1) ... [2018-10-24 17:19:24,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@777de76b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:24, skipping insertion in model container [2018-10-24 17:19:24,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 05:19:24" (1/1) ... [2018-10-24 17:19:24,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 17:19:24,557 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 17:19:25,237 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 17:19:25,243 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 17:19:25,627 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 17:19:25,650 INFO L193 MainTranslator]: Completed translation [2018-10-24 17:19:25,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25 WrapperNode [2018-10-24 17:19:25,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 17:19:25,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 17:19:25,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 17:19:25,652 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 17:19:25,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (1/1) ... [2018-10-24 17:19:25,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (1/1) ... [2018-10-24 17:19:25,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 17:19:25,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 17:19:25,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 17:19:25,983 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 17:19:25,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (1/1) ... [2018-10-24 17:19:25,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (1/1) ... [2018-10-24 17:19:26,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (1/1) ... [2018-10-24 17:19:26,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (1/1) ... [2018-10-24 17:19:26,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (1/1) ... [2018-10-24 17:19:26,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (1/1) ... [2018-10-24 17:19:26,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (1/1) ... [2018-10-24 17:19:26,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 17:19:26,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 17:19:26,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 17:19:26,125 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 17:19:26,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (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 [2018-10-24 17:19:26,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 17:19:26,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 17:19:26,199 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 17:19:26,199 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 17:19:26,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 17:19:26,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 17:19:26,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 17:19:26,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 17:19:31,105 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 17:19:31,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 05:19:31 BoogieIcfgContainer [2018-10-24 17:19:31,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 17:19:31,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 17:19:31,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 17:19:31,111 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 17:19:31,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 05:19:24" (1/3) ... [2018-10-24 17:19:31,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63624b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 05:19:31, skipping insertion in model container [2018-10-24 17:19:31,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 05:19:25" (2/3) ... [2018-10-24 17:19:31,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63624b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 05:19:31, skipping insertion in model container [2018-10-24 17:19:31,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 05:19:31" (3/3) ... [2018-10-24 17:19:31,116 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label09_false-unreach-call.c [2018-10-24 17:19:31,126 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 17:19:31,135 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 17:19:31,154 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 17:19:31,195 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 17:19:31,195 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 17:19:31,195 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 17:19:31,195 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 17:19:31,195 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 17:19:31,196 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 17:19:31,196 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 17:19:31,196 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 17:19:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-24 17:19:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-24 17:19:31,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 17:19:31,248 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 17:19:31,250 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 17:19:31,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 17:19:31,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1379578932, now seen corresponding path program 1 times [2018-10-24 17:19:31,262 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 17:19:31,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:31,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 17:19:31,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:31,323 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 17:19:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 17:19:32,245 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-24 17:19:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 17:19:32,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 17:19:32,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 17:19:32,649 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 17:19:32,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 17:19:32,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 17:19:32,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 17:19:32,674 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-10-24 17:19:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 17:19:35,795 INFO L93 Difference]: Finished difference Result 1054 states and 1900 transitions. [2018-10-24 17:19:35,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 17:19:35,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2018-10-24 17:19:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 17:19:35,826 INFO L225 Difference]: With dead ends: 1054 [2018-10-24 17:19:35,827 INFO L226 Difference]: Without dead ends: 736 [2018-10-24 17:19:35,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 17:19:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2018-10-24 17:19:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 526. [2018-10-24 17:19:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2018-10-24 17:19:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 886 transitions. [2018-10-24 17:19:35,946 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 886 transitions. Word has length 155 [2018-10-24 17:19:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 17:19:35,947 INFO L481 AbstractCegarLoop]: Abstraction has 526 states and 886 transitions. [2018-10-24 17:19:35,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 17:19:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 886 transitions. [2018-10-24 17:19:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-24 17:19:35,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 17:19:35,954 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 17:19:35,955 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 17:19:35,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 17:19:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash -211363835, now seen corresponding path program 1 times [2018-10-24 17:19:35,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 17:19:35,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:35,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 17:19:35,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:35,957 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 17:19:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 17:19:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 17:19:36,425 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 17:19:36,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 17:19:36,426 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 17:19:36,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 17:19:36,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 17:19:36,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 17:19:36,428 INFO L87 Difference]: Start difference. First operand 526 states and 886 transitions. Second operand 6 states. [2018-10-24 17:19:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 17:19:39,386 INFO L93 Difference]: Finished difference Result 1588 states and 2744 transitions. [2018-10-24 17:19:39,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 17:19:39,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2018-10-24 17:19:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 17:19:39,397 INFO L225 Difference]: With dead ends: 1588 [2018-10-24 17:19:39,397 INFO L226 Difference]: Without dead ends: 1068 [2018-10-24 17:19:39,401 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 [2018-10-24 17:19:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2018-10-24 17:19:39,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1025. [2018-10-24 17:19:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2018-10-24 17:19:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1721 transitions. [2018-10-24 17:19:39,473 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1721 transitions. Word has length 165 [2018-10-24 17:19:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 17:19:39,473 INFO L481 AbstractCegarLoop]: Abstraction has 1025 states and 1721 transitions. [2018-10-24 17:19:39,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 17:19:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1721 transitions. [2018-10-24 17:19:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-24 17:19:39,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 17:19:39,479 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 17:19:39,479 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 17:19:39,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 17:19:39,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1423519688, now seen corresponding path program 1 times [2018-10-24 17:19:39,480 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 17:19:39,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:39,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 17:19:39,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:39,481 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 17:19:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 17:19:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 17:19:39,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 17:19:39,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 17:19:39,829 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 17:19:39,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 17:19:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 17:19:39,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 17:19:39,831 INFO L87 Difference]: Start difference. First operand 1025 states and 1721 transitions. Second operand 3 states. [2018-10-24 17:19:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 17:19:43,455 INFO L93 Difference]: Finished difference Result 2908 states and 5067 transitions. [2018-10-24 17:19:43,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 17:19:43,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2018-10-24 17:19:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 17:19:43,468 INFO L225 Difference]: With dead ends: 2908 [2018-10-24 17:19:43,469 INFO L226 Difference]: Without dead ends: 1889 [2018-10-24 17:19:43,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 17:19:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2018-10-24 17:19:43,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1869. [2018-10-24 17:19:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1869 states. [2018-10-24 17:19:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 3142 transitions. [2018-10-24 17:19:43,532 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 3142 transitions. Word has length 168 [2018-10-24 17:19:43,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 17:19:43,533 INFO L481 AbstractCegarLoop]: Abstraction has 1869 states and 3142 transitions. [2018-10-24 17:19:43,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 17:19:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 3142 transitions. [2018-10-24 17:19:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-24 17:19:43,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 17:19:43,540 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 17:19:43,540 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 17:19:43,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 17:19:43,541 INFO L82 PathProgramCache]: Analyzing trace with hash 634374037, now seen corresponding path program 1 times [2018-10-24 17:19:43,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 17:19:43,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:43,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 17:19:43,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:43,542 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 17:19:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 17:19:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 17:19:43,760 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 17:19:43,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 17:19:43,761 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 17:19:43,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 17:19:43,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 17:19:43,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 17:19:43,762 INFO L87 Difference]: Start difference. First operand 1869 states and 3142 transitions. Second operand 6 states. [2018-10-24 17:19:47,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 17:19:47,299 INFO L93 Difference]: Finished difference Result 5741 states and 10710 transitions. [2018-10-24 17:19:47,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 17:19:47,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2018-10-24 17:19:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 17:19:47,337 INFO L225 Difference]: With dead ends: 5741 [2018-10-24 17:19:47,338 INFO L226 Difference]: Without dead ends: 3878 [2018-10-24 17:19:47,346 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 [2018-10-24 17:19:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2018-10-24 17:19:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 3764. [2018-10-24 17:19:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3764 states. [2018-10-24 17:19:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 6536 transitions. [2018-10-24 17:19:47,508 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 6536 transitions. Word has length 173 [2018-10-24 17:19:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 17:19:47,509 INFO L481 AbstractCegarLoop]: Abstraction has 3764 states and 6536 transitions. [2018-10-24 17:19:47,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 17:19:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 6536 transitions. [2018-10-24 17:19:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-24 17:19:47,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 17:19:47,522 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 17:19:47,522 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 17:19:47,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 17:19:47,523 INFO L82 PathProgramCache]: Analyzing trace with hash 279397812, now seen corresponding path program 1 times [2018-10-24 17:19:47,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 17:19:47,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:47,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 17:19:47,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:47,524 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 17:19:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 17:19:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 17:19:47,834 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 17:19:47,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-24 17:19:47,834 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 17:19:47,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 17:19:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 17:19:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 17:19:47,836 INFO L87 Difference]: Start difference. First operand 3764 states and 6536 transitions. Second operand 7 states. [2018-10-24 17:19:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 17:19:49,893 INFO L93 Difference]: Finished difference Result 11468 states and 22298 transitions. [2018-10-24 17:19:49,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 17:19:49,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 174 [2018-10-24 17:19:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 17:19:49,951 INFO L225 Difference]: With dead ends: 11468 [2018-10-24 17:19:49,952 INFO L226 Difference]: Without dead ends: 7710 [2018-10-24 17:19:49,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-10-24 17:19:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7710 states. [2018-10-24 17:19:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7710 to 7523. [2018-10-24 17:19:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7523 states. [2018-10-24 17:19:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7523 states to 7523 states and 13613 transitions. [2018-10-24 17:19:50,265 INFO L78 Accepts]: Start accepts. Automaton has 7523 states and 13613 transitions. Word has length 174 [2018-10-24 17:19:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 17:19:50,266 INFO L481 AbstractCegarLoop]: Abstraction has 7523 states and 13613 transitions. [2018-10-24 17:19:50,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 17:19:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7523 states and 13613 transitions. [2018-10-24 17:19:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-24 17:19:50,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 17:19:50,290 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 17:19:50,290 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 17:19:50,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 17:19:50,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1038337502, now seen corresponding path program 1 times [2018-10-24 17:19:50,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 17:19:50,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:50,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 17:19:50,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:50,292 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 17:19:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 17:19:50,559 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 17:19:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 17:19:50,875 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 17:19:50,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 17:19:50,875 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 17:19:50,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 17:19:50,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 17:19:50,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 17:19:50,876 INFO L87 Difference]: Start difference. First operand 7523 states and 13613 transitions. Second operand 6 states. [2018-10-24 17:19:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 17:19:53,914 INFO L93 Difference]: Finished difference Result 23479 states and 46249 transitions. [2018-10-24 17:19:53,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 17:19:53,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2018-10-24 17:19:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 17:19:54,014 INFO L225 Difference]: With dead ends: 23479 [2018-10-24 17:19:54,015 INFO L226 Difference]: Without dead ends: 15962 [2018-10-24 17:19:54,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 17:19:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15962 states. [2018-10-24 17:19:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15962 to 15714. [2018-10-24 17:19:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15714 states. [2018-10-24 17:19:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15714 states to 15714 states and 27871 transitions. [2018-10-24 17:19:54,571 INFO L78 Accepts]: Start accepts. Automaton has 15714 states and 27871 transitions. Word has length 180 [2018-10-24 17:19:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 17:19:54,571 INFO L481 AbstractCegarLoop]: Abstraction has 15714 states and 27871 transitions. [2018-10-24 17:19:54,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 17:19:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 15714 states and 27871 transitions. [2018-10-24 17:19:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-24 17:19:54,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 17:19:54,618 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2018-10-24 17:19:54,619 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 17:19:54,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 17:19:54,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1657030729, now seen corresponding path program 1 times [2018-10-24 17:19:54,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 17:19:54,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:54,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 17:19:54,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 17:19:54,621 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 17:19:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 17:19:54,873 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-24 17:19:55,229 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-24 17:19:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 17:19:55,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 17:19:55,545 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 17:19:55,546 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 183 with the following transitions: [2018-10-24 17:19:55,551 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [17], [21], [25], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [701], [703], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 17:19:55,677 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 17:19:55,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 17:23:43,083 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 17:23:43,085 INFO L272 AbstractInterpreter]: Visited 156 different actions 156 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-24 17:23:43,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 17:23:43,096 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown