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/Problem17_label19_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 22:08:10,278 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 22:08:10,280 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 22:08:10,292 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 22:08:10,292 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 22:08:10,293 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 22:08:10,294 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 22:08:10,296 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 22:08:10,298 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 22:08:10,299 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 22:08:10,299 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 22:08:10,300 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 22:08:10,301 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 22:08:10,302 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 22:08:10,303 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 22:08:10,304 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 22:08:10,304 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 22:08:10,306 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 22:08:10,308 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 22:08:10,310 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 22:08:10,311 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 22:08:10,312 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 22:08:10,314 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 22:08:10,321 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 22:08:10,321 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 22:08:10,322 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 22:08:10,323 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 22:08:10,323 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 22:08:10,348 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 22:08:10,348 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 22:08:10,349 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 22:08:10,349 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 22:08:10,350 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 22:08:10,350 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 22:08:10,350 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 22:08:10,350 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 22:08:10,351 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 22:08:10,351 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 22:08:10,351 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 22:08:10,351 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 22:08:10,352 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 22:08:10,352 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 22:08:10,352 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 22:08:10,352 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 22:08:10,353 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 22:08:10,353 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 22:08:10,353 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 22:08:10,353 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 22:08:10,353 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 22:08:10,353 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 22:08:10,354 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 22:08:10,354 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 22:08:10,354 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 22:08:10,354 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 22:08:10,355 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 22:08:10,355 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 22:08:10,355 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 22:08:10,355 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 22:08:10,355 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 22:08:10,356 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 22:08:10,356 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 22:08:10,356 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 22:08:10,399 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 22:08:10,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 22:08:10,415 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 22:08:10,417 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 22:08:10,417 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 22:08:10,418 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label19_true-unreach-call.c [2018-10-24 22:08:10,477 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cc50e94c8/b6cd8c124ff849489c82114b51a3141f/FLAG45b7d60f1 [2018-10-24 22:08:11,146 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 22:08:11,147 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label19_true-unreach-call.c [2018-10-24 22:08:11,169 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cc50e94c8/b6cd8c124ff849489c82114b51a3141f/FLAG45b7d60f1 [2018-10-24 22:08:11,185 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cc50e94c8/b6cd8c124ff849489c82114b51a3141f [2018-10-24 22:08:11,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 22:08:11,198 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 22:08:11,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 22:08:11,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 22:08:11,204 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 22:08:11,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:08:11" (1/1) ... [2018-10-24 22:08:11,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8de4687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:11, skipping insertion in model container [2018-10-24 22:08:11,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:08:11" (1/1) ... [2018-10-24 22:08:11,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 22:08:11,324 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 22:08:12,365 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 22:08:12,369 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 22:08:12,793 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 22:08:12,818 INFO L193 MainTranslator]: Completed translation [2018-10-24 22:08:12,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12 WrapperNode [2018-10-24 22:08:12,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 22:08:12,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 22:08:12,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 22:08:12,820 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 22:08:12,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (1/1) ... [2018-10-24 22:08:12,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (1/1) ... [2018-10-24 22:08:13,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 22:08:13,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 22:08:13,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 22:08:13,328 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 22:08:13,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (1/1) ... [2018-10-24 22:08:13,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (1/1) ... [2018-10-24 22:08:13,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (1/1) ... [2018-10-24 22:08:13,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (1/1) ... [2018-10-24 22:08:13,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (1/1) ... [2018-10-24 22:08:13,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (1/1) ... [2018-10-24 22:08:13,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (1/1) ... [2018-10-24 22:08:13,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 22:08:13,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 22:08:13,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 22:08:13,689 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 22:08:13,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (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 22:08:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 22:08:13,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 22:08:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 22:08:13,766 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 22:08:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 22:08:13,766 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 22:08:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 22:08:13,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 22:08:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 22:08:13,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 22:08:25,700 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 22:08:25,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:08:25 BoogieIcfgContainer [2018-10-24 22:08:25,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 22:08:25,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 22:08:25,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 22:08:25,708 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 22:08:25,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:08:11" (1/3) ... [2018-10-24 22:08:25,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b3a4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:08:25, skipping insertion in model container [2018-10-24 22:08:25,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:08:12" (2/3) ... [2018-10-24 22:08:25,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b3a4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:08:25, skipping insertion in model container [2018-10-24 22:08:25,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:08:25" (3/3) ... [2018-10-24 22:08:25,712 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label19_true-unreach-call.c [2018-10-24 22:08:25,722 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 22:08:25,732 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 22:08:25,751 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 22:08:25,794 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 22:08:25,794 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 22:08:25,794 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 22:08:25,795 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 22:08:25,795 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 22:08:25,795 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 22:08:25,795 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 22:08:25,795 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 22:08:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-24 22:08:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-24 22:08:25,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:08:25,846 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] [2018-10-24 22:08:25,848 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:08:25,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:08:25,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1876496990, now seen corresponding path program 1 times [2018-10-24 22:08:25,858 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:08:25,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:08:25,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:08:25,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:08:25,919 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:08:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:08:26,390 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 22:08:26,393 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:08:26,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 22:08:26,394 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:08:26,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 22:08:26,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 22:08:26,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 22:08:26,422 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-24 22:08:37,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:08:37,665 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-10-24 22:08:37,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 22:08:37,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2018-10-24 22:08:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:08:37,705 INFO L225 Difference]: With dead ends: 2164 [2018-10-24 22:08:37,705 INFO L226 Difference]: Without dead ends: 1554 [2018-10-24 22:08:37,724 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 [2018-10-24 22:08:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-10-24 22:08:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1052. [2018-10-24 22:08:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-10-24 22:08:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1882 transitions. [2018-10-24 22:08:37,865 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1882 transitions. Word has length 49 [2018-10-24 22:08:37,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:08:37,866 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1882 transitions. [2018-10-24 22:08:37,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 22:08:37,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1882 transitions. [2018-10-24 22:08:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-24 22:08:37,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:08:37,874 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:37,874 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:08:37,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:08:37,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1564943023, now seen corresponding path program 1 times [2018-10-24 22:08:37,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:08:37,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:08:37,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:08:37,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:08:37,879 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:08:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:08:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:08:38,218 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:08:38,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 22:08:38,218 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:08:38,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 22:08:38,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 22:08:38,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 22:08:38,221 INFO L87 Difference]: Start difference. First operand 1052 states and 1882 transitions. Second operand 5 states. [2018-10-24 22:08:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:08:50,208 INFO L93 Difference]: Finished difference Result 3031 states and 5537 transitions. [2018-10-24 22:08:50,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 22:08:50,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2018-10-24 22:08:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:08:50,232 INFO L225 Difference]: With dead ends: 3031 [2018-10-24 22:08:50,232 INFO L226 Difference]: Without dead ends: 1985 [2018-10-24 22:08:50,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 22:08:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-10-24 22:08:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-10-24 22:08:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-10-24 22:08:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-10-24 22:08:50,334 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 121 [2018-10-24 22:08:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:08:50,334 INFO L481 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-10-24 22:08:50,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 22:08:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-10-24 22:08:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-24 22:08:50,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:08:50,346 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:50,346 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:08:50,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:08:50,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1382747383, now seen corresponding path program 1 times [2018-10-24 22:08:50,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:08:50,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:08:50,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:08:50,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:08:50,348 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:08:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:08:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:08:50,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:08:50,994 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:08:50,995 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 125 with the following transitions: [2018-10-24 22:08:50,997 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], [958], [966], [974], [982], [990], [998], [1002], [1004], [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] [2018-10-24 22:08:51,073 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 22:08:51,073 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:08:52,551 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 22:09:13,051 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 22:09:13,052 INFO L272 AbstractInterpreter]: Visited 83 different actions 544 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 22:09:13,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:09:13,073 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 22:09:13,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:09:13,074 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 [2018-10-24 22:09:13,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:09:13,091 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:09:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:09:13,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:09:15,710 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-10-24 22:09:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:09:16,765 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 22:09:17,195 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2018-10-24 22:09:17,916 WARN L179 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-10-24 22:09:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:09:18,333 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-24 22:09:18,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-24 22:09:18,334 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:09:18,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 22:09:18,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 22:09:18,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=164, Unknown=1, NotChecked=0, Total=210 [2018-10-24 22:09:18,336 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 6 states. [2018-10-24 22:10:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:10:17,281 INFO L93 Difference]: Finished difference Result 7527 states and 12898 transitions. [2018-10-24 22:10:17,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 22:10:17,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2018-10-24 22:10:17,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:10:17,316 INFO L225 Difference]: With dead ends: 7527 [2018-10-24 22:10:17,317 INFO L226 Difference]: Without dead ends: 5574 [2018-10-24 22:10:17,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=45, Invalid=164, Unknown=1, NotChecked=0, Total=210 [2018-10-24 22:10:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2018-10-24 22:10:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 5566. [2018-10-24 22:10:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5566 states. [2018-10-24 22:10:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5566 states to 5566 states and 8713 transitions. [2018-10-24 22:10:17,500 INFO L78 Accepts]: Start accepts. Automaton has 5566 states and 8713 transitions. Word has length 124 [2018-10-24 22:10:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:10:17,500 INFO L481 AbstractCegarLoop]: Abstraction has 5566 states and 8713 transitions. [2018-10-24 22:10:17,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 22:10:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5566 states and 8713 transitions. [2018-10-24 22:10:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-24 22:10:17,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:10:17,511 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:17,511 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:10:17,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:10:17,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1130206287, now seen corresponding path program 1 times [2018-10-24 22:10:17,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:10:17,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:10:17,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:10:17,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:10:17,513 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:10:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:10:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:10:17,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:10:17,771 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:10:17,771 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 138 with the following transitions: [2018-10-24 22:10:17,771 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], [958], [966], [974], [982], [990], [998], [1002], [1004], [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], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 22:10:17,779 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 22:10:17,779 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:10:19,387 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 22:10:28,325 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 22:10:28,325 INFO L272 AbstractInterpreter]: Visited 96 different actions 274 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 22:10:28,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:10:28,365 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 22:10:28,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:10:28,365 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:10:28,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:10:28,381 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:10:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:10:28,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:10:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:10:28,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 22:10:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:10:28,826 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 22:10:28,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-24 22:10:28,826 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:10:28,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 22:10:28,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 22:10:28,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 22:10:28,831 INFO L87 Difference]: Start difference. First operand 5566 states and 8713 transitions. Second operand 3 states. [2018-10-24 22:10:33,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:10:33,272 INFO L93 Difference]: Finished difference Result 13751 states and 21491 transitions. [2018-10-24 22:10:33,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 22:10:33,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2018-10-24 22:10:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:10:33,314 INFO L225 Difference]: With dead ends: 13751 [2018-10-24 22:10:33,314 INFO L226 Difference]: Without dead ends: 8191 [2018-10-24 22:10:33,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 273 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 22:10:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8191 states. [2018-10-24 22:10:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8191 to 8190. [2018-10-24 22:10:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8190 states. [2018-10-24 22:10:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8190 states to 8190 states and 12062 transitions. [2018-10-24 22:10:33,564 INFO L78 Accepts]: Start accepts. Automaton has 8190 states and 12062 transitions. Word has length 137 [2018-10-24 22:10:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:10:33,564 INFO L481 AbstractCegarLoop]: Abstraction has 8190 states and 12062 transitions. [2018-10-24 22:10:33,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 22:10:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 8190 states and 12062 transitions. [2018-10-24 22:10:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-24 22:10:33,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:10:33,568 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:33,569 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:10:33,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:10:33,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1656879347, now seen corresponding path program 1 times [2018-10-24 22:10:33,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:10:33,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:10:33,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:10:33,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:10:33,570 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:10:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:10:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:10:33,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:10:33,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 22:10:33,765 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:10:33,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 22:10:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 22:10:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 22:10:33,766 INFO L87 Difference]: Start difference. First operand 8190 states and 12062 transitions. Second operand 5 states. [2018-10-24 22:10:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:10:50,646 INFO L93 Difference]: Finished difference Result 25885 states and 40085 transitions. [2018-10-24 22:10:50,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 22:10:50,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2018-10-24 22:10:50,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:10:50,739 INFO L225 Difference]: With dead ends: 25885 [2018-10-24 22:10:50,739 INFO L226 Difference]: Without dead ends: 17701 [2018-10-24 22:10:50,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 22:10:50,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17701 states. [2018-10-24 22:10:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17701 to 17578. [2018-10-24 22:10:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17578 states. [2018-10-24 22:10:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17578 states to 17578 states and 24317 transitions. [2018-10-24 22:10:51,253 INFO L78 Accepts]: Start accepts. Automaton has 17578 states and 24317 transitions. Word has length 139 [2018-10-24 22:10:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:10:51,253 INFO L481 AbstractCegarLoop]: Abstraction has 17578 states and 24317 transitions. [2018-10-24 22:10:51,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 22:10:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 17578 states and 24317 transitions. [2018-10-24 22:10:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-24 22:10:51,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:10:51,263 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 22:10:51,263 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:10:51,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:10:51,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1062053734, now seen corresponding path program 1 times [2018-10-24 22:10:51,264 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:10:51,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:10:51,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:10:51,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:10:51,265 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:10:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:10:51,611 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 22:10:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 85 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-24 22:10:52,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:10:52,027 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:10:52,027 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 203 with the following transitions: [2018-10-24 22:10:52,027 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], [958], [966], [974], [982], [990], [998], [1002], [1004], [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], [1224], [1228], [1232], [1235], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 22:10:52,032 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 22:10:52,032 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:10:52,890 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 22:11:10,982 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 22:11:10,982 INFO L272 AbstractInterpreter]: Visited 87 different actions 572 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 22:11:10,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:11:10,986 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 22:11:10,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:11:10,986 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:11:10,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:11:10,996 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:11:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:11:11,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:11:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:11:11,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 22:11:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:11:11,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 22:11:11,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-24 22:11:11,334 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 22:11:11,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 22:11:11,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 22:11:11,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-24 22:11:11,336 INFO L87 Difference]: Start difference. First operand 17578 states and 24317 transitions. Second operand 9 states. [2018-10-24 22:11:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:11:18,850 INFO L93 Difference]: Finished difference Result 35234 states and 49042 transitions. [2018-10-24 22:11:18,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 22:11:18,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 202 [2018-10-24 22:11:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:11:18,896 INFO L225 Difference]: With dead ends: 35234 [2018-10-24 22:11:18,897 INFO L226 Difference]: Without dead ends: 15019 [2018-10-24 22:11:18,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 402 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-24 22:11:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15019 states. [2018-10-24 22:11:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15019 to 14547. [2018-10-24 22:11:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14547 states. [2018-10-24 22:11:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14547 states to 14547 states and 17082 transitions. [2018-10-24 22:11:19,210 INFO L78 Accepts]: Start accepts. Automaton has 14547 states and 17082 transitions. Word has length 202 [2018-10-24 22:11:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:11:19,211 INFO L481 AbstractCegarLoop]: Abstraction has 14547 states and 17082 transitions. [2018-10-24 22:11:19,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 22:11:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 14547 states and 17082 transitions. [2018-10-24 22:11:19,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-24 22:11:19,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:11:19,219 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:11:19,219 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:11:19,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:11:19,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1393136275, now seen corresponding path program 1 times [2018-10-24 22:11:19,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:11:19,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:11:19,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:11:19,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:11:19,221 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:11:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:11:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 22:11:19,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:11:19,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 22:11:19,493 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:11:19,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 22:11:19,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 22:11:19,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 22:11:19,495 INFO L87 Difference]: Start difference. First operand 14547 states and 17082 transitions. Second operand 3 states. [2018-10-24 22:11:23,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:11:23,941 INFO L93 Difference]: Finished difference Result 36946 states and 44233 transitions. [2018-10-24 22:11:23,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 22:11:23,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 303 [2018-10-24 22:11:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:11:24,009 INFO L225 Difference]: With dead ends: 36946 [2018-10-24 22:11:24,010 INFO L226 Difference]: Without dead ends: 18947 [2018-10-24 22:11:24,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 22:11:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18947 states. [2018-10-24 22:11:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18947 to 18939. [2018-10-24 22:11:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18939 states. [2018-10-24 22:11:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18939 states to 18939 states and 22033 transitions. [2018-10-24 22:11:24,356 INFO L78 Accepts]: Start accepts. Automaton has 18939 states and 22033 transitions. Word has length 303 [2018-10-24 22:11:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:11:24,356 INFO L481 AbstractCegarLoop]: Abstraction has 18939 states and 22033 transitions. [2018-10-24 22:11:24,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 22:11:24,357 INFO L276 IsEmpty]: Start isEmpty. Operand 18939 states and 22033 transitions. [2018-10-24 22:11:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-10-24 22:11:24,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:11:24,373 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:11:24,373 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:11:24,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:11:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash 741072818, now seen corresponding path program 1 times [2018-10-24 22:11:24,374 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:11:24,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:11:24,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:11:24,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:11:24,375 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:11:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:11:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:11:24,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:11:24,892 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:11:24,893 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 398 with the following transitions: [2018-10-24 22:11:24,894 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [273], [710], [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], [958], [966], [974], [982], [990], [998], [1002], [1004], [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], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-24 22:11:24,907 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 22:11:24,907 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:11:34,110 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-10-24 22:12:10,589 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-24 22:12:10,590 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-24 22:12:10,590 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 22:12:10,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:12:10,590 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:12:10,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:12:10,598 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:12:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:12:10,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:12:10,724 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 22:12:10,925 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:12:10,926 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 22:12:10,932 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 22:12:10,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:12:10 BoogieIcfgContainer [2018-10-24 22:12:10,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 22:12:10,933 INFO L168 Benchmark]: Toolchain (without parser) took 239735.60 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 617.3 MB. Max. memory is 7.1 GB. [2018-10-24 22:12:10,936 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 22:12:10,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1619.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-24 22:12:10,938 INFO L168 Benchmark]: Boogie Procedure Inliner took 507.55 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -933.6 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-24 22:12:10,939 INFO L168 Benchmark]: Boogie Preprocessor took 360.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2018-10-24 22:12:10,940 INFO L168 Benchmark]: RCFGBuilder took 12013.98 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 472.6 MB). Peak memory consumption was 472.6 MB. Max. memory is 7.1 GB. [2018-10-24 22:12:10,941 INFO L168 Benchmark]: TraceAbstraction took 225228.38 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.7 GB in the beginning and 3.5 GB in the end (delta: -1.8 GB). Peak memory consumption was 127.7 MB. Max. memory is 7.1 GB. [2018-10-24 22:12:10,949 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1619.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 507.55 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -933.6 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 360.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12013.98 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 472.6 MB). Peak memory consumption was 472.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 225228.38 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.7 GB in the beginning and 3.5 GB in the end (delta: -1.8 GB). Peak memory consumption was 127.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 134]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 134). Cancelled while BasicCegarLoop was analyzing trace of length 398 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 225.1s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 116.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2799 SDtfs, 11438 SDslu, 1777 SDs, 0 SdLazy, 18892 SolverSat, 5065 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 107.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 989 GetRequests, 930 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18939occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 97.3s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 7 MinimizatonAttempts, 1140 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 1538 NumberOfCodeBlocks, 1538 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1988 ConstructedInterpolants, 123 QuantifiedInterpolants, 1285791 SizeOfPredicates, 6 NumberOfNonLiveVariables, 962 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 888/985 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown