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_label20_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 22:46:30,647 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 22:46:30,649 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 22:46:30,666 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 22:46:30,666 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 22:46:30,668 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 22:46:30,669 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 22:46:30,673 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 22:46:30,675 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 22:46:30,677 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 22:46:30,678 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 22:46:30,679 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 22:46:30,680 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 22:46:30,687 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 22:46:30,688 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 22:46:30,691 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 22:46:30,692 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 22:46:30,694 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 22:46:30,698 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 22:46:30,700 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 22:46:30,702 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 22:46:30,703 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 22:46:30,705 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 22:46:30,715 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 22:46:30,730 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 22:46:30,730 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 22:46:30,731 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 22:46:30,731 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 22:46:30,732 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 22:46:30,732 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 22:46:30,732 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 22:46:30,732 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 22:46:30,732 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 22:46:30,733 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 22:46:30,733 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 22:46:30,733 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 22:46:30,734 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 22:46:30,734 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 22:46:30,734 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 22:46:30,734 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 22:46:30,734 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 22:46:30,735 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 22:46:30,735 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 22:46:30,735 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 22:46:30,735 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 22:46:30,735 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 22:46:30,736 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 22:46:30,736 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 22:46:30,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 22:46:30,736 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 22:46:30,736 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 22:46:30,736 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 22:46:30,737 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 22:46:30,737 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 22:46:30,737 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 22:46:30,737 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 22:46:30,738 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 22:46:30,738 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 22:46:30,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 22:46:30,791 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 22:46:30,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 22:46:30,799 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 22:46:30,799 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 22:46:30,800 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label20_false-unreach-call.c [2018-10-23 22:46:30,855 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dc984c5a9/b4fcb4fcb50a4fd2ade21e308b17667f/FLAGa99ccfaf7 [2018-10-23 22:46:31,572 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 22:46:31,573 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label20_false-unreach-call.c [2018-10-23 22:46:31,602 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dc984c5a9/b4fcb4fcb50a4fd2ade21e308b17667f/FLAGa99ccfaf7 [2018-10-23 22:46:31,621 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dc984c5a9/b4fcb4fcb50a4fd2ade21e308b17667f [2018-10-23 22:46:31,634 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 22:46:31,637 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 22:46:31,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 22:46:31,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 22:46:31,645 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 22:46:31,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:46:31" (1/1) ... [2018-10-23 22:46:31,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3236d4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:31, skipping insertion in model container [2018-10-23 22:46:31,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:46:31" (1/1) ... [2018-10-23 22:46:31,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 22:46:31,798 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 22:46:32,868 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:46:32,873 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 22:46:33,327 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:46:33,355 INFO L193 MainTranslator]: Completed translation [2018-10-23 22:46:33,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33 WrapperNode [2018-10-23 22:46:33,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 22:46:33,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 22:46:33,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 22:46:33,358 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 22:46:33,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (1/1) ... [2018-10-23 22:46:33,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (1/1) ... [2018-10-23 22:46:33,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 22:46:33,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 22:46:33,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 22:46:33,823 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 22:46:33,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (1/1) ... [2018-10-23 22:46:33,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (1/1) ... [2018-10-23 22:46:33,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (1/1) ... [2018-10-23 22:46:33,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (1/1) ... [2018-10-23 22:46:33,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (1/1) ... [2018-10-23 22:46:34,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (1/1) ... [2018-10-23 22:46:34,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (1/1) ... [2018-10-23 22:46:34,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 22:46:34,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 22:46:34,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 22:46:34,109 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 22:46:34,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 22:46:34,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 22:46:34,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 22:46:34,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-23 22:46:34,174 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-23 22:46:34,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-23 22:46:34,175 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-23 22:46:34,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 22:46:34,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 22:46:34,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 22:46:34,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 22:46:46,989 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 22:46:46,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:46:46 BoogieIcfgContainer [2018-10-23 22:46:46,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 22:46:46,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 22:46:46,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 22:46:46,997 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 22:46:46,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:46:31" (1/3) ... [2018-10-23 22:46:47,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5220029f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:46:46, skipping insertion in model container [2018-10-23 22:46:47,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:46:33" (2/3) ... [2018-10-23 22:46:47,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5220029f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:46:47, skipping insertion in model container [2018-10-23 22:46:47,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:46:46" (3/3) ... [2018-10-23 22:46:47,004 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label20_false-unreach-call.c [2018-10-23 22:46:47,015 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 22:46:47,028 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 22:46:47,051 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 22:46:47,115 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 22:46:47,115 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 22:46:47,115 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 22:46:47,116 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 22:46:47,116 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 22:46:47,116 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 22:46:47,116 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 22:46:47,116 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 22:46:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-23 22:46:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-23 22:46:47,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:46:47,177 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:46:47,181 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:46:47,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:46:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1249764322, now seen corresponding path program 1 times [2018-10-23 22:46:47,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:46:47,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:46:47,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:46:47,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:46:47,248 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:46:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:46:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:46:47,669 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:46:47,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:46:47,669 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:46:47,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:46:47,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:46:47,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:46:47,694 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-23 22:46:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:46:59,546 INFO L93 Difference]: Finished difference Result 2137 states and 3966 transitions. [2018-10-23 22:46:59,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:46:59,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-10-23 22:46:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:46:59,590 INFO L225 Difference]: With dead ends: 2137 [2018-10-23 22:46:59,590 INFO L226 Difference]: Without dead ends: 1527 [2018-10-23 22:46:59,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:46:59,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2018-10-23 22:46:59,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1513. [2018-10-23 22:46:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1513 states. [2018-10-23 22:46:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2344 transitions. [2018-10-23 22:46:59,789 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2344 transitions. Word has length 33 [2018-10-23 22:46:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:46:59,789 INFO L481 AbstractCegarLoop]: Abstraction has 1513 states and 2344 transitions. [2018-10-23 22:46:59,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:46:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2344 transitions. [2018-10-23 22:46:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-23 22:46:59,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:46:59,797 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:46:59,798 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:46:59,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:46:59,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1581854865, now seen corresponding path program 1 times [2018-10-23 22:46:59,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:46:59,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:46:59,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:46:59,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:46:59,800 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:46:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:47:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:47:00,133 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:47:00,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 22:47:00,133 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:47:00,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 22:47:00,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 22:47:00,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 22:47:00,136 INFO L87 Difference]: Start difference. First operand 1513 states and 2344 transitions. Second operand 5 states. [2018-10-23 22:47:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:47:12,232 INFO L93 Difference]: Finished difference Result 4413 states and 7007 transitions. [2018-10-23 22:47:12,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:47:12,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2018-10-23 22:47:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:47:12,257 INFO L225 Difference]: With dead ends: 4413 [2018-10-23 22:47:12,257 INFO L226 Difference]: Without dead ends: 2906 [2018-10-23 22:47:12,263 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 [2018-10-23 22:47:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2018-10-23 22:47:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2873. [2018-10-23 22:47:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2873 states. [2018-10-23 22:47:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 4204 transitions. [2018-10-23 22:47:12,375 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 4204 transitions. Word has length 105 [2018-10-23 22:47:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:47:12,377 INFO L481 AbstractCegarLoop]: Abstraction has 2873 states and 4204 transitions. [2018-10-23 22:47:12,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 22:47:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 4204 transitions. [2018-10-23 22:47:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-23 22:47:12,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:47:12,388 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:47:12,388 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:47:12,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:47:12,392 INFO L82 PathProgramCache]: Analyzing trace with hash 129577417, now seen corresponding path program 1 times [2018-10-23 22:47:12,392 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:47:12,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:47:12,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:47:12,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:47:12,393 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:47:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:47:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:47:12,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:47:12,699 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:47:12,700 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 109 with the following transitions: [2018-10-23 22:47:12,702 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], [874], [876], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [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] [2018-10-23 22:47:12,777 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:47:12,777 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:47:14,184 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:47:34,277 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 22:47:34,278 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. [2018-10-23 22:47:34,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:47:34,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 22:47:34,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:47:34,291 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 [2018-10-23 22:47:34,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:47:34,304 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 22:47:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:47:34,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 22:48:03,274 WARN L179 SmtUtils]: Spent 24.34 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-23 22:48:23,509 WARN L179 SmtUtils]: Spent 16.10 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-10-23 22:48:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:48:23,770 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 22:48:28,698 WARN L179 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-23 22:48:28,859 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-23 22:48:31,316 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-23 22:48:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:48:31,672 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-23 22:48:31,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-23 22:48:31,673 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:48:31,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:48:31,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:48:31,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=160, Unknown=5, NotChecked=0, Total=210 [2018-10-23 22:48:31,675 INFO L87 Difference]: Start difference. First operand 2873 states and 4204 transitions. Second operand 6 states. [2018-10-23 22:50:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:50:02,036 INFO L93 Difference]: Finished difference Result 11184 states and 17364 transitions. [2018-10-23 22:50:02,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 22:50:02,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2018-10-23 22:50:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:50:02,099 INFO L225 Difference]: With dead ends: 11184 [2018-10-23 22:50:02,100 INFO L226 Difference]: Without dead ends: 8317 [2018-10-23 22:50:02,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=45, Invalid=160, Unknown=5, NotChecked=0, Total=210 [2018-10-23 22:50:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8317 states. [2018-10-23 22:50:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8317 to 8239. [2018-10-23 22:50:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8239 states. [2018-10-23 22:50:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8239 states to 8239 states and 11943 transitions. [2018-10-23 22:50:02,393 INFO L78 Accepts]: Start accepts. Automaton has 8239 states and 11943 transitions. Word has length 108 [2018-10-23 22:50:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:50:02,394 INFO L481 AbstractCegarLoop]: Abstraction has 8239 states and 11943 transitions. [2018-10-23 22:50:02,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:50:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 8239 states and 11943 transitions. [2018-10-23 22:50:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-23 22:50:02,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:50:02,408 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:50:02,408 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:50:02,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:50:02,409 INFO L82 PathProgramCache]: Analyzing trace with hash -244022956, now seen corresponding path program 1 times [2018-10-23 22:50:02,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:50:02,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:02,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:50:02,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:02,411 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:50:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:50:02,745 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:50:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:50:02,904 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:50:02,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 22:50:02,904 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:50:02,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:50:02,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:50:02,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:50:02,905 INFO L87 Difference]: Start difference. First operand 8239 states and 11943 transitions. Second operand 6 states. [2018-10-23 22:50:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:50:10,711 INFO L93 Difference]: Finished difference Result 20149 states and 29956 transitions. [2018-10-23 22:50:10,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:50:10,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2018-10-23 22:50:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:50:10,795 INFO L225 Difference]: With dead ends: 20149 [2018-10-23 22:50:10,795 INFO L226 Difference]: Without dead ends: 11916 [2018-10-23 22:50:10,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 22:50:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11916 states. [2018-10-23 22:50:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11916 to 11818. [2018-10-23 22:50:11,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11818 states. [2018-10-23 22:50:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11818 states to 11818 states and 15191 transitions. [2018-10-23 22:50:11,200 INFO L78 Accepts]: Start accepts. Automaton has 11818 states and 15191 transitions. Word has length 177 [2018-10-23 22:50:11,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:50:11,202 INFO L481 AbstractCegarLoop]: Abstraction has 11818 states and 15191 transitions. [2018-10-23 22:50:11,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:50:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 11818 states and 15191 transitions. [2018-10-23 22:50:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-23 22:50:11,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:50:11,207 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:50:11,207 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:50:11,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:50:11,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1544409704, now seen corresponding path program 1 times [2018-10-23 22:50:11,208 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:50:11,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:11,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:50:11,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:11,209 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:50:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:50:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-23 22:50:11,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:50:11,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:50:11,557 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:50:11,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:50:11,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:50:11,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:50:11,558 INFO L87 Difference]: Start difference. First operand 11818 states and 15191 transitions. Second operand 4 states. [2018-10-23 22:50:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:50:22,370 INFO L93 Difference]: Finished difference Result 39440 states and 52353 transitions. [2018-10-23 22:50:22,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:50:22,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 197 [2018-10-23 22:50:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:50:22,522 INFO L225 Difference]: With dead ends: 39440 [2018-10-23 22:50:22,522 INFO L226 Difference]: Without dead ends: 27628 [2018-10-23 22:50:22,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:50:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27628 states. [2018-10-23 22:50:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27628 to 27621. [2018-10-23 22:50:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27621 states. [2018-10-23 22:50:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27621 states to 27621 states and 33949 transitions. [2018-10-23 22:50:23,307 INFO L78 Accepts]: Start accepts. Automaton has 27621 states and 33949 transitions. Word has length 197 [2018-10-23 22:50:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:50:23,308 INFO L481 AbstractCegarLoop]: Abstraction has 27621 states and 33949 transitions. [2018-10-23 22:50:23,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:50:23,308 INFO L276 IsEmpty]: Start isEmpty. Operand 27621 states and 33949 transitions. [2018-10-23 22:50:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-23 22:50:23,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:50:23,323 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:50:23,324 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:50:23,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:50:23,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1917962551, now seen corresponding path program 1 times [2018-10-23 22:50:23,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:50:23,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:23,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:50:23,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:23,326 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:50:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:50:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-23 22:50:24,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:50:24,014 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:50:24,014 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 243 with the following transitions: [2018-10-23 22:50:24,015 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], [874], [876], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [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], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [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], [1435], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-23 22:50:24,032 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:50:24,033 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:50:25,589 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-10-23 22:50:38,133 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-23 22:50:38,134 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-23 22:50:38,134 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 22:50:38,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:50:38,135 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 [2018-10-23 22:50:38,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:50:38,158 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 22:50:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:50:38,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 22:50:38,260 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 22:50:38,464 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 22:50:38,464 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 22:50:38,469 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 22:50:38,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:50:38 BoogieIcfgContainer [2018-10-23 22:50:38,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 22:50:38,470 INFO L168 Benchmark]: Toolchain (without parser) took 246835.24 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -453.2 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-10-23 22:50:38,471 INFO L168 Benchmark]: CDTParser took 0.18 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. [2018-10-23 22:50:38,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1718.29 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-10-23 22:50:38,473 INFO L168 Benchmark]: Boogie Procedure Inliner took 464.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -947.6 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2018-10-23 22:50:38,474 INFO L168 Benchmark]: Boogie Preprocessor took 285.67 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: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2018-10-23 22:50:38,474 INFO L168 Benchmark]: RCFGBuilder took 12883.67 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: 472.7 MB). Peak memory consumption was 472.7 MB. Max. memory is 7.1 GB. [2018-10-23 22:50:38,475 INFO L168 Benchmark]: TraceAbstraction took 231476.45 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 1.9 GB in the end (delta: -132.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-23 22:50:38,480 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 1718.29 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 464.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -947.6 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 285.67 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: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12883.67 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: 472.7 MB). Peak memory consumption was 472.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 231476.45 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 1.9 GB in the end (delta: -132.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 86). Cancelled while BasicCegarLoop was analyzing trace of length 243 with TraceHistMax 3,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, 231.3s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 133.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1683 SDtfs, 8565 SDslu, 1202 SDs, 0 SdLazy, 13248 SolverSat, 4815 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 126.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 254 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 57.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27621occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 35.7s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 5 MinimizatonAttempts, 230 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 58.7s InterpolantComputationTime, 728 NumberOfCodeBlocks, 728 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 829 ConstructedInterpolants, 107 QuantifiedInterpolants, 1131121 SizeOfPredicates, 3 NumberOfNonLiveVariables, 261 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 210/258 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown