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/Problem15_label00_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 23:57:44,656 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:57:44,658 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:57:44,671 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:57:44,671 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:57:44,673 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:57:44,674 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:57:44,676 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:57:44,678 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:57:44,679 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:57:44,680 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:57:44,680 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:57:44,681 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:57:44,682 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:57:44,683 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:57:44,684 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:57:44,685 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:57:44,687 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:57:44,689 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:57:44,691 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:57:44,692 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:57:44,694 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:57:44,696 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:57:44,696 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:57:44,697 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:57:44,698 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:57:44,699 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:57:44,700 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:57:44,701 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:57:44,702 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:57:44,702 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:57:44,703 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-26 23:57:44,706 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 [2018-10-26 23:57:44,721 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:57:44,722 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:57:44,722 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:57:44,723 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 23:57:44,723 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 23:57:44,723 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 23:57:44,723 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 23:57:44,724 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 23:57:44,724 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-26 23:57:44,724 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 23:57:44,724 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 23:57:44,725 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 23:57:44,725 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:57:44,726 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 23:57:44,728 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:57:44,728 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:57:44,728 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:57:44,728 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:57:44,729 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:57:44,729 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:57:44,729 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:57:44,729 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:57:44,729 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:57:44,730 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:57:44,730 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:57:44,730 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:57:44,730 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:57:44,730 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:57:44,731 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 23:57:44,731 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:57:44,731 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 23:57:44,731 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 23:57:44,731 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 23:57:44,732 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-26 23:57:44,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:57:44,800 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:57:44,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:57:44,808 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:57:44,808 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:57:44,809 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label00_false-unreach-call.c [2018-10-26 23:57:44,878 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8eebb63d1/4fce6e9424d04b5dad75654743829224/FLAG50e984fe5 [2018-10-26 23:57:45,649 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:57:45,650 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label00_false-unreach-call.c [2018-10-26 23:57:45,674 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8eebb63d1/4fce6e9424d04b5dad75654743829224/FLAG50e984fe5 [2018-10-26 23:57:45,696 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8eebb63d1/4fce6e9424d04b5dad75654743829224 [2018-10-26 23:57:45,709 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:57:45,712 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 23:57:45,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:57:45,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:57:45,718 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:57:45,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:57:45" (1/1) ... [2018-10-26 23:57:45,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d3a67d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:45, skipping insertion in model container [2018-10-26 23:57:45,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:57:45" (1/1) ... [2018-10-26 23:57:45,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:57:45,840 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:57:46,615 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:57:46,621 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:57:46,915 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:57:46,939 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:57:46,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46 WrapperNode [2018-10-26 23:57:46,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:57:46,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 23:57:46,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 23:57:46,941 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 23:57:46,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (1/1) ... [2018-10-26 23:57:47,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (1/1) ... [2018-10-26 23:57:47,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 23:57:47,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:57:47,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:57:47,366 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:57:47,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (1/1) ... [2018-10-26 23:57:47,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (1/1) ... [2018-10-26 23:57:47,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (1/1) ... [2018-10-26 23:57:47,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (1/1) ... [2018-10-26 23:57:47,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (1/1) ... [2018-10-26 23:57:47,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (1/1) ... [2018-10-26 23:57:47,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (1/1) ... [2018-10-26 23:57:47,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:57:47,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:57:47,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:57:47,605 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:57:47,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (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 [2018-10-26 23:57:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:57:47,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:57:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-26 23:57:47,676 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-26 23:57:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-26 23:57:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-26 23:57:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:57:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:57:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:57:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:57:54,824 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:57:54,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:57:54 BoogieIcfgContainer [2018-10-26 23:57:54,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:57:54,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:57:54,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:57:54,831 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:57:54,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:57:45" (1/3) ... [2018-10-26 23:57:54,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a56735f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:57:54, skipping insertion in model container [2018-10-26 23:57:54,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:57:46" (2/3) ... [2018-10-26 23:57:54,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a56735f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:57:54, skipping insertion in model container [2018-10-26 23:57:54,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:57:54" (3/3) ... [2018-10-26 23:57:54,836 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label00_false-unreach-call.c [2018-10-26 23:57:54,847 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:57:54,858 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:57:54,878 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:57:54,921 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:57:54,921 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:57:54,921 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:57:54,921 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:57:54,922 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:57:54,922 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:57:54,922 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:57:54,922 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:57:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-10-26 23:57:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 23:57:54,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:57:54,963 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:57:54,966 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:57:54,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:57:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2089929615, now seen corresponding path program 1 times [2018-10-26 23:57:54,976 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:57:55,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:57:55,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:57:55,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:57:55,036 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:57:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:57:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:57:55,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:57:55,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 23:57:55,237 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:57:55,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 23:57:55,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 23:57:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:57:55,260 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 3 states. [2018-10-26 23:58:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:58:02,858 INFO L93 Difference]: Finished difference Result 1188 states and 2146 transitions. [2018-10-26 23:58:02,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 23:58:02,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-26 23:58:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:58:02,885 INFO L225 Difference]: With dead ends: 1188 [2018-10-26 23:58:02,885 INFO L226 Difference]: Without dead ends: 748 [2018-10-26 23:58:02,897 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 [2018-10-26 23:58:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2018-10-26 23:58:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2018-10-26 23:58:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2018-10-26 23:58:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1128 transitions. [2018-10-26 23:58:03,005 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1128 transitions. Word has length 13 [2018-10-26 23:58:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:58:03,006 INFO L481 AbstractCegarLoop]: Abstraction has 746 states and 1128 transitions. [2018-10-26 23:58:03,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 23:58:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1128 transitions. [2018-10-26 23:58:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-26 23:58:03,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:58:03,013 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-26 23:58:03,014 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:58:03,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:58:03,014 INFO L82 PathProgramCache]: Analyzing trace with hash 341889893, now seen corresponding path program 1 times [2018-10-26 23:58:03,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:58:03,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:03,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:58:03,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:03,016 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:58:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:58:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:58:03,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:58:03,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 23:58:03,318 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:58:03,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 23:58:03,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 23:58:03,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 23:58:03,322 INFO L87 Difference]: Start difference. First operand 746 states and 1128 transitions. Second operand 5 states. [2018-10-26 23:58:03,496 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-26 23:58:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:58:17,838 INFO L93 Difference]: Finished difference Result 2394 states and 3589 transitions. [2018-10-26 23:58:17,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:58:17,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2018-10-26 23:58:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:58:17,851 INFO L225 Difference]: With dead ends: 2394 [2018-10-26 23:58:17,851 INFO L226 Difference]: Without dead ends: 1654 [2018-10-26 23:58:17,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:58:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2018-10-26 23:58:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1646. [2018-10-26 23:58:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2018-10-26 23:58:17,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2402 transitions. [2018-10-26 23:58:17,955 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2402 transitions. Word has length 83 [2018-10-26 23:58:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:58:17,955 INFO L481 AbstractCegarLoop]: Abstraction has 1646 states and 2402 transitions. [2018-10-26 23:58:17,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 23:58:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2402 transitions. [2018-10-26 23:58:17,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-26 23:58:17,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:58:17,960 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-26 23:58:17,961 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:58:17,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:58:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash 320095328, now seen corresponding path program 1 times [2018-10-26 23:58:17,961 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:58:17,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:17,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:58:17,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:17,963 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:58:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:58:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:58:18,549 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:58:18,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-26 23:58:18,549 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:58:18,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:58:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:58:18,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:58:18,551 INFO L87 Difference]: Start difference. First operand 1646 states and 2402 transitions. Second operand 6 states. [2018-10-26 23:58:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:58:26,222 INFO L93 Difference]: Finished difference Result 4250 states and 6736 transitions. [2018-10-26 23:58:26,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:58:26,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2018-10-26 23:58:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:58:26,245 INFO L225 Difference]: With dead ends: 4250 [2018-10-26 23:58:26,245 INFO L226 Difference]: Without dead ends: 2919 [2018-10-26 23:58:26,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-26 23:58:26,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2018-10-26 23:58:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2871. [2018-10-26 23:58:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2871 states. [2018-10-26 23:58:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 4002 transitions. [2018-10-26 23:58:26,354 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 4002 transitions. Word has length 88 [2018-10-26 23:58:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:58:26,355 INFO L481 AbstractCegarLoop]: Abstraction has 2871 states and 4002 transitions. [2018-10-26 23:58:26,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:58:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 4002 transitions. [2018-10-26 23:58:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-26 23:58:26,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:58:26,357 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-26 23:58:26,358 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:58:26,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:58:26,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2101566060, now seen corresponding path program 1 times [2018-10-26 23:58:26,358 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:58:26,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:26,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:58:26,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:26,360 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:58:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:58:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:58:26,460 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:58:26,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 23:58:26,460 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:58:26,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 23:58:26,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 23:58:26,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:58:26,462 INFO L87 Difference]: Start difference. First operand 2871 states and 4002 transitions. Second operand 3 states. [2018-10-26 23:58:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:58:31,354 INFO L93 Difference]: Finished difference Result 6354 states and 9172 transitions. [2018-10-26 23:58:31,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 23:58:31,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2018-10-26 23:58:31,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:58:31,375 INFO L225 Difference]: With dead ends: 6354 [2018-10-26 23:58:31,376 INFO L226 Difference]: Without dead ends: 3798 [2018-10-26 23:58:31,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:58:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2018-10-26 23:58:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3798. [2018-10-26 23:58:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3798 states. [2018-10-26 23:58:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 5085 transitions. [2018-10-26 23:58:31,479 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 5085 transitions. Word has length 94 [2018-10-26 23:58:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:58:31,479 INFO L481 AbstractCegarLoop]: Abstraction has 3798 states and 5085 transitions. [2018-10-26 23:58:31,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 23:58:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 5085 transitions. [2018-10-26 23:58:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-26 23:58:31,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:58:31,484 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-26 23:58:31,485 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:58:31,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:58:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash -770209994, now seen corresponding path program 1 times [2018-10-26 23:58:31,485 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:58:31,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:31,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:58:31,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:31,487 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:58:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:58:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:58:31,676 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:58:31,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-26 23:58:31,676 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:58:31,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:58:31,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:58:31,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:58:31,677 INFO L87 Difference]: Start difference. First operand 3798 states and 5085 transitions. Second operand 6 states. [2018-10-26 23:58:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:58:37,394 INFO L93 Difference]: Finished difference Result 7604 states and 10325 transitions. [2018-10-26 23:58:37,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:58:37,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-10-26 23:58:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:58:37,414 INFO L225 Difference]: With dead ends: 7604 [2018-10-26 23:58:37,414 INFO L226 Difference]: Without dead ends: 4120 [2018-10-26 23:58:37,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-26 23:58:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2018-10-26 23:58:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 4007. [2018-10-26 23:58:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4007 states. [2018-10-26 23:58:37,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5161 transitions. [2018-10-26 23:58:37,523 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5161 transitions. Word has length 100 [2018-10-26 23:58:37,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:58:37,523 INFO L481 AbstractCegarLoop]: Abstraction has 4007 states and 5161 transitions. [2018-10-26 23:58:37,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:58:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5161 transitions. [2018-10-26 23:58:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-26 23:58:37,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:58:37,525 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-26 23:58:37,526 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:58:37,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:58:37,526 INFO L82 PathProgramCache]: Analyzing trace with hash -504215513, now seen corresponding path program 1 times [2018-10-26 23:58:37,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:58:37,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:37,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:58:37,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:37,528 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:58:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:58:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:58:37,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:58:37,693 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:58:37,694 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 110 with the following transitions: [2018-10-26 23:58:37,696 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-26 23:58:37,766 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:58:37,766 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:58:39,713 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 23:58:46,431 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 23:58:46,432 INFO L272 AbstractInterpreter]: Visited 104 different actions 298 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-26 23:58:46,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:58:46,449 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 23:58:46,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:58:46,449 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 [2018-10-26 23:58:46,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:58:46,460 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 23:58:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:58:46,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:58:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:58:46,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:58:47,055 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-26 23:58:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:58:47,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:58:47,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2018-10-26 23:58:47,349 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:58:47,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:58:47,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:58:47,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-10-26 23:58:47,350 INFO L87 Difference]: Start difference. First operand 4007 states and 5161 transitions. Second operand 6 states. [2018-10-26 23:58:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:58:56,312 INFO L93 Difference]: Finished difference Result 12745 states and 17259 transitions. [2018-10-26 23:58:56,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 23:58:56,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2018-10-26 23:58:56,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:58:56,370 INFO L225 Difference]: With dead ends: 12745 [2018-10-26 23:58:56,370 INFO L226 Difference]: Without dead ends: 9052 [2018-10-26 23:58:56,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-10-26 23:58:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9052 states. [2018-10-26 23:58:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9052 to 8996. [2018-10-26 23:58:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8996 states. [2018-10-26 23:58:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8996 states to 8996 states and 11752 transitions. [2018-10-26 23:58:56,606 INFO L78 Accepts]: Start accepts. Automaton has 8996 states and 11752 transitions. Word has length 109 [2018-10-26 23:58:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:58:56,607 INFO L481 AbstractCegarLoop]: Abstraction has 8996 states and 11752 transitions. [2018-10-26 23:58:56,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:58:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 8996 states and 11752 transitions. [2018-10-26 23:58:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-26 23:58:56,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:58:56,610 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-26 23:58:56,611 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:58:56,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:58:56,611 INFO L82 PathProgramCache]: Analyzing trace with hash 661156445, now seen corresponding path program 1 times [2018-10-26 23:58:56,611 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:58:56,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:56,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:58:56,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:58:56,613 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:58:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:58:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:58:56,771 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:58:56,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 23:58:56,771 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:58:56,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 23:58:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 23:58:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:58:56,773 INFO L87 Difference]: Start difference. First operand 8996 states and 11752 transitions. Second operand 3 states. [2018-10-26 23:59:02,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:59:02,936 INFO L93 Difference]: Finished difference Result 17682 states and 23224 transitions. [2018-10-26 23:59:02,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 23:59:02,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2018-10-26 23:59:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:59:02,977 INFO L225 Difference]: With dead ends: 17682 [2018-10-26 23:59:02,977 INFO L226 Difference]: Without dead ends: 9000 [2018-10-26 23:59:03,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:59:03,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2018-10-26 23:59:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 8996. [2018-10-26 23:59:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8996 states. [2018-10-26 23:59:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8996 states to 8996 states and 11174 transitions. [2018-10-26 23:59:03,199 INFO L78 Accepts]: Start accepts. Automaton has 8996 states and 11174 transitions. Word has length 158 [2018-10-26 23:59:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:59:03,200 INFO L481 AbstractCegarLoop]: Abstraction has 8996 states and 11174 transitions. [2018-10-26 23:59:03,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 23:59:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 8996 states and 11174 transitions. [2018-10-26 23:59:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-26 23:59:03,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:59:03,204 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:59:03,204 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:59:03,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:59:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash 913470733, now seen corresponding path program 1 times [2018-10-26 23:59:03,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:59:03,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:59:03,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:59:03,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:59:03,206 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:59:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:59:03,735 WARN L179 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-10-26 23:59:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 23:59:04,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:59:04,084 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:59:04,085 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 174 with the following transitions: [2018-10-26 23:59:04,085 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [609], [610], [614], [617], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-26 23:59:04,091 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:59:04,092 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:59:05,033 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 23:59:05,033 INFO L272 AbstractInterpreter]: Visited 86 different actions 86 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-26 23:59:05,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:59:05,052 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 23:59:06,411 INFO L227 lantSequenceWeakener]: Weakened 165 states. On average, predicates are now at 77.25% of their original sizes. [2018-10-26 23:59:06,412 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 23:59:06,596 INFO L415 sIntCurrentIteration]: We unified 172 AI predicates to 172 [2018-10-26 23:59:06,597 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 23:59:06,597 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 23:59:06,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-10-26 23:59:06,598 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:59:06,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 23:59:06,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 23:59:06,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:59:06,599 INFO L87 Difference]: Start difference. First operand 8996 states and 11174 transitions. Second operand 7 states. [2018-10-26 23:59:09,364 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 00:00:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:00:27,431 INFO L93 Difference]: Finished difference Result 17680 states and 22010 transitions. [2018-10-27 00:00:27,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 00:00:27,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2018-10-27 00:00:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:00:27,472 INFO L225 Difference]: With dead ends: 17680 [2018-10-27 00:00:27,472 INFO L226 Difference]: Without dead ends: 8998 [2018-10-27 00:00:27,496 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 173 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-27 00:00:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8998 states. [2018-10-27 00:00:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8998 to 8996. [2018-10-27 00:00:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8996 states. [2018-10-27 00:00:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8996 states to 8996 states and 11157 transitions. [2018-10-27 00:00:27,697 INFO L78 Accepts]: Start accepts. Automaton has 8996 states and 11157 transitions. Word has length 173 [2018-10-27 00:00:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:00:27,697 INFO L481 AbstractCegarLoop]: Abstraction has 8996 states and 11157 transitions. [2018-10-27 00:00:27,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 00:00:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 8996 states and 11157 transitions. [2018-10-27 00:00:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-27 00:00:27,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:00:27,702 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:00:27,702 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:00:27,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:00:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash -926180506, now seen corresponding path program 1 times [2018-10-27 00:00:27,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:00:27,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:00:27,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:00:27,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:00:27,704 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:00:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:00:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-27 00:00:28,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:00:28,315 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:00:28,315 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 183 with the following transitions: [2018-10-27 00:00:28,316 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [585], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 00:00:28,325 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 00:00:28,325 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 00:00:29,928 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 00:00:33,717 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 00:00:33,717 INFO L272 AbstractInterpreter]: Visited 105 different actions 301 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 00:00:33,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:00:33,722 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 00:00:33,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:00:33,722 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 [2018-10-27 00:00:33,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:00:33,734 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 00:00:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:00:33,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:00:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-10-27 00:00:33,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:00:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-10-27 00:00:34,266 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:00:34,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2018-10-27 00:00:34,267 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:00:34,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 00:00:34,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 00:00:34,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-27 00:00:34,268 INFO L87 Difference]: Start difference. First operand 8996 states and 11157 transitions. Second operand 5 states. [2018-10-27 00:00:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:00:39,093 INFO L93 Difference]: Finished difference Result 20864 states and 26605 transitions. [2018-10-27 00:00:39,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 00:00:39,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2018-10-27 00:00:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:00:39,131 INFO L225 Difference]: With dead ends: 20864 [2018-10-27 00:00:39,131 INFO L226 Difference]: Without dead ends: 12182 [2018-10-27 00:00:39,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 362 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-27 00:00:39,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12182 states. [2018-10-27 00:00:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12182 to 11234. [2018-10-27 00:00:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11234 states. [2018-10-27 00:00:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11234 states to 11234 states and 13289 transitions. [2018-10-27 00:00:39,351 INFO L78 Accepts]: Start accepts. Automaton has 11234 states and 13289 transitions. Word has length 182 [2018-10-27 00:00:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:00:39,352 INFO L481 AbstractCegarLoop]: Abstraction has 11234 states and 13289 transitions. [2018-10-27 00:00:39,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 00:00:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 11234 states and 13289 transitions. [2018-10-27 00:00:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-10-27 00:00:39,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:00:39,359 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:00:39,359 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:00:39,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:00:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash -229060413, now seen corresponding path program 1 times [2018-10-27 00:00:39,360 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:00:39,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:00:39,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:00:39,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:00:39,361 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:00:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:00:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 102 proven. 150 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 00:00:40,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:00:40,312 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:00:40,312 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 270 with the following transitions: [2018-10-27 00:00:40,313 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [609], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 00:00:40,317 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 00:00:40,317 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 00:00:42,320 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 00:00:46,211 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 00:00:46,212 INFO L272 AbstractInterpreter]: Visited 106 different actions 305 times. Merged at 5 different actions 10 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 00:00:46,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:00:46,219 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 00:00:46,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:00:46,219 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 [2018-10-27 00:00:46,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:00:46,228 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 00:00:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:00:46,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:00:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 224 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 00:00:46,599 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:00:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 28 proven. 224 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 00:00:47,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:00:47,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2018-10-27 00:00:47,076 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:00:47,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-27 00:00:47,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 00:00:47,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2018-10-27 00:00:47,078 INFO L87 Difference]: Start difference. First operand 11234 states and 13289 transitions. Second operand 14 states. [2018-10-27 00:00:57,292 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2018-10-27 00:01:06,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:01:06,474 INFO L93 Difference]: Finished difference Result 25604 states and 30536 transitions. [2018-10-27 00:01:06,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-27 00:01:06,475 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 269 [2018-10-27 00:01:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:01:06,522 INFO L225 Difference]: With dead ends: 25604 [2018-10-27 00:01:06,522 INFO L226 Difference]: Without dead ends: 13799 [2018-10-27 00:01:06,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 554 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=429, Invalid=1293, Unknown=0, NotChecked=0, Total=1722 [2018-10-27 00:01:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13799 states. [2018-10-27 00:01:06,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13799 to 13080. [2018-10-27 00:01:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13080 states. [2018-10-27 00:01:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13080 states to 13080 states and 15495 transitions. [2018-10-27 00:01:06,791 INFO L78 Accepts]: Start accepts. Automaton has 13080 states and 15495 transitions. Word has length 269 [2018-10-27 00:01:06,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:01:06,791 INFO L481 AbstractCegarLoop]: Abstraction has 13080 states and 15495 transitions. [2018-10-27 00:01:06,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-27 00:01:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 13080 states and 15495 transitions. [2018-10-27 00:01:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-27 00:01:06,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:01:06,799 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:01:06,800 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:01:06,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:01:06,800 INFO L82 PathProgramCache]: Analyzing trace with hash 129296168, now seen corresponding path program 1 times [2018-10-27 00:01:06,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:01:06,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:01:06,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:01:06,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:01:06,802 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:01:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:01:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 102 proven. 150 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 00:01:07,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:01:07,436 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:01:07,437 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 355 with the following transitions: [2018-10-27 00:01:07,437 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [609], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1115], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 00:01:07,442 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 00:01:07,442 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 00:01:12,237 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 00:01:24,700 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 00:01:24,700 INFO L272 AbstractInterpreter]: Visited 191 different actions 560 times. Merged at 5 different actions 10 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 00:01:24,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:01:24,709 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 00:01:24,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:01:24,709 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 [2018-10-27 00:01:24,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:01:24,719 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 00:01:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:01:24,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:01:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 224 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 00:01:25,192 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:01:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 28 proven. 224 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 00:01:25,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:01:25,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2018-10-27 00:01:25,763 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:01:25,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-27 00:01:25,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 00:01:25,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2018-10-27 00:01:25,764 INFO L87 Difference]: Start difference. First operand 13080 states and 15495 transitions. Second operand 14 states. Received shutdown request... [2018-10-27 00:01:35,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-27 00:01:35,621 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 00:01:35,627 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 00:01:35,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 12:01:35 BoogieIcfgContainer [2018-10-27 00:01:35,627 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 00:01:35,628 INFO L168 Benchmark]: Toolchain (without parser) took 229918.29 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 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-27 00:01:35,629 INFO L168 Benchmark]: CDTParser took 0.25 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. [2018-10-27 00:01:35,630 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1226.90 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: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. [2018-10-27 00:01:35,630 INFO L168 Benchmark]: Boogie Procedure Inliner took 424.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -866.6 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-27 00:01:35,631 INFO L168 Benchmark]: Boogie Preprocessor took 238.59 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: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-10-27 00:01:35,632 INFO L168 Benchmark]: RCFGBuilder took 7221.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 300.1 MB). Peak memory consumption was 300.1 MB. Max. memory is 7.1 GB. [2018-10-27 00:01:35,633 INFO L168 Benchmark]: TraceAbstraction took 220800.04 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 2.8 GB in the end (delta: -961.6 MB). Peak memory consumption was 911.7 MB. Max. memory is 7.1 GB. [2018-10-27 00:01:35,640 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 1226.90 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: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 424.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -866.6 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 238.59 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: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7221.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 300.1 MB). Peak memory consumption was 300.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220800.04 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 2.8 GB in the end (delta: -961.6 MB). Peak memory consumption was 911.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 25). Cancelled while BasicCegarLoop was constructing difference of abstraction (13080states) and FLOYD_HOARE automaton (currently 26 states, 14 states before enhancement),while ReachableStatesComputation was computing reachable states (12137 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 220.7s OverallTime, 11 OverallIterations, 4 TraceHistogramMax, 170.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3382 SDtfs, 20925 SDslu, 2722 SDs, 0 SdLazy, 30635 SolverSat, 5190 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 134.0s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 2166 GetRequests, 2034 SyntacticMatches, 10 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13080occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 38.3s AbstIntTime, 5 AbstIntIterations, 1 AbstIntStrong, 0.9941333838894507 AbsIntWeakeningRatio, 0.1511627906976744 AbsIntAvgWeakeningVarsNumRemoved, 873.6918604651163 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 10 MinimizatonAttempts, 1900 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 2537 NumberOfCodeBlocks, 2537 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 3432 ConstructedInterpolants, 0 QuantifiedInterpolants, 5114411 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1680 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 19 InterpolantComputations, 8 PerfectInterpolantSequences, 990/1936 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown