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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label15_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:31:20,234 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:31:20,236 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:31:20,256 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:31:20,256 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:31:20,258 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:31:20,259 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:31:20,262 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:31:20,264 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:31:20,272 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:31:20,273 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:31:20,273 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:31:20,276 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:31:20,277 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:31:20,278 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:31:20,282 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:31:20,283 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:31:20,286 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:31:20,291 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:31:20,293 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:31:20,296 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:31:20,297 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:31:20,301 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 08:31:20,319 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:31:20,350 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:31:20,350 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:31:20,351 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:31:20,352 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:31:20,355 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:31:20,355 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:31:20,355 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:31:20,355 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:31:20,355 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:31:20,356 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:31:20,356 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:31:20,356 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:31:20,356 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:31:20,356 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:31:20,360 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:31:20,360 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:31:20,360 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:31:20,360 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:31:20,361 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:31:20,361 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:31:20,361 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:31:20,361 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:31:20,361 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:31:20,362 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:31:20,363 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:31:20,363 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:31:20,364 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:31:20,364 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:31:20,364 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:31:20,364 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:31:20,364 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:31:20,365 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:31:20,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:31:20,365 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:31:20,365 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:31:20,365 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:31:20,415 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:31:20,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:31:20,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:31:20,436 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:31:20,436 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:31:20,437 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label15_true-unreach-call.c [2018-10-27 08:31:20,508 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/30aad27cd/16ed365f739b49a58898da1f13747387/FLAG553eec00a [2018-10-27 08:31:21,312 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:31:21,313 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label15_true-unreach-call.c [2018-10-27 08:31:21,346 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/30aad27cd/16ed365f739b49a58898da1f13747387/FLAG553eec00a [2018-10-27 08:31:21,366 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/30aad27cd/16ed365f739b49a58898da1f13747387 [2018-10-27 08:31:21,381 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:31:21,383 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:31:21,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:31:21,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:31:21,391 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:31:21,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:31:21" (1/1) ... [2018-10-27 08:31:21,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e86a12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:21, skipping insertion in model container [2018-10-27 08:31:21,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:31:21" (1/1) ... [2018-10-27 08:31:21,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:31:21,543 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:31:22,550 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:31:22,557 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:31:23,051 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:31:23,076 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:31:23,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23 WrapperNode [2018-10-27 08:31:23,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:31:23,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:31:23,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:31:23,079 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:31:23,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (1/1) ... [2018-10-27 08:31:23,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (1/1) ... [2018-10-27 08:31:23,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:31:23,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:31:23,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:31:23,578 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:31:23,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (1/1) ... [2018-10-27 08:31:23,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (1/1) ... [2018-10-27 08:31:23,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (1/1) ... [2018-10-27 08:31:23,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (1/1) ... [2018-10-27 08:31:23,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (1/1) ... [2018-10-27 08:31:23,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (1/1) ... [2018-10-27 08:31:23,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (1/1) ... [2018-10-27 08:31:23,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:31:23,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:31:23,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:31:23,869 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:31:23,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:31:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:31:23,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:31:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 08:31:23,938 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 08:31:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:31:23,938 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:31:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:31:23,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:31:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:31:23,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:31:34,648 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:31:34,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:31:34 BoogieIcfgContainer [2018-10-27 08:31:34,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:31:34,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:31:34,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:31:34,655 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:31:34,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:31:21" (1/3) ... [2018-10-27 08:31:34,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bdbc52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:31:34, skipping insertion in model container [2018-10-27 08:31:34,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:23" (2/3) ... [2018-10-27 08:31:34,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bdbc52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:31:34, skipping insertion in model container [2018-10-27 08:31:34,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:31:34" (3/3) ... [2018-10-27 08:31:34,659 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label15_true-unreach-call.c [2018-10-27 08:31:34,670 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:31:34,680 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:31:34,699 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:31:34,744 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:31:34,744 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:31:34,744 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:31:34,744 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:31:34,744 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:31:34,745 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:31:34,745 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:31:34,745 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:31:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 08:31:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-27 08:31:34,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:31:34,798 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] [2018-10-27 08:31:34,801 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:31:34,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:31:34,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2012982790, now seen corresponding path program 1 times [2018-10-27 08:31:34,809 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:31:34,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:31:34,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:31:34,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:31:34,860 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:31:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:31:35,273 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-27 08:31:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:31:35,294 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:31:35,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:31:35,294 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:31:35,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:31:35,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:31:35,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:31:35,320 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 08:31:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:31:45,896 INFO L93 Difference]: Finished difference Result 2163 states and 4008 transitions. [2018-10-27 08:31:45,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:31:45,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-10-27 08:31:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:31:45,934 INFO L225 Difference]: With dead ends: 2163 [2018-10-27 08:31:45,934 INFO L226 Difference]: Without dead ends: 1553 [2018-10-27 08:31:45,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:31:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2018-10-27 08:31:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1051. [2018-10-27 08:31:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-10-27 08:31:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1881 transitions. [2018-10-27 08:31:46,099 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1881 transitions. Word has length 43 [2018-10-27 08:31:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:31:46,100 INFO L481 AbstractCegarLoop]: Abstraction has 1051 states and 1881 transitions. [2018-10-27 08:31:46,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:31:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1881 transitions. [2018-10-27 08:31:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-27 08:31:46,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:31:46,112 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:31:46,114 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:31:46,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:31:46,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1160890231, now seen corresponding path program 1 times [2018-10-27 08:31:46,114 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:31:46,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:31:46,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:31:46,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:31:46,116 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:31:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:31:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:31:46,417 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:31:46,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 08:31:46,417 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:31:46,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 08:31:46,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 08:31:46,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 08:31:46,420 INFO L87 Difference]: Start difference. First operand 1051 states and 1881 transitions. Second operand 5 states. [2018-10-27 08:31:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:31:56,658 INFO L93 Difference]: Finished difference Result 3030 states and 5536 transitions. [2018-10-27 08:31:56,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:31:56,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2018-10-27 08:31:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:31:56,677 INFO L225 Difference]: With dead ends: 3030 [2018-10-27 08:31:56,677 INFO L226 Difference]: Without dead ends: 1985 [2018-10-27 08:31:56,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:31:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-10-27 08:31:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-10-27 08:31:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-10-27 08:31:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-10-27 08:31:56,758 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 115 [2018-10-27 08:31:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:31:56,759 INFO L481 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-10-27 08:31:56,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 08:31:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-10-27 08:31:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-27 08:31:56,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:31:56,764 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:31:56,765 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:31:56,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:31:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2146986351, now seen corresponding path program 1 times [2018-10-27 08:31:56,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:31:56,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:31:56,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:31:56,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:31:56,767 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:31:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:31:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:31:57,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:31:57,106 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:31:57,107 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 119 with the following transitions: [2018-10-27 08:31:57,109 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [954], [956], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:31:57,154 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:31:57,154 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:31:58,211 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:31:58,213 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 08:31:58,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:31:58,259 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:31:58,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:31:58,259 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:31:58,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:31:58,278 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:31:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:31:58,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:32:04,980 WARN L179 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 42 [2018-10-27 08:32:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:32:05,075 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:32:06,094 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-10-27 08:32:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:32:06,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 08:32:06,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-10-27 08:32:06,552 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:32:06,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:32:06,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:32:06,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-27 08:32:06,556 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 6 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown