java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label25_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:48:25,667 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:48:25,669 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:48:25,681 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:48:25,682 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:48:25,683 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:48:25,684 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:48:25,686 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:48:25,687 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:48:25,688 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:48:25,689 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:48:25,690 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:48:25,691 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:48:25,692 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:48:25,693 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:48:25,694 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:48:25,694 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:48:25,696 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:48:25,699 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:48:25,700 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:48:25,701 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:48:25,703 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:48:25,708 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:48:25,709 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:48:25,709 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:48:25,710 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:48:25,711 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:48:25,712 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:48:25,713 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:48:25,715 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:48:25,716 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:48:25,716 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:48:25,717 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:48:25,717 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:48:25,718 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:48:25,718 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:48:25,719 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 16:48:25,734 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:48:25,735 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:48:25,735 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:48:25,736 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:48:25,736 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:48:25,736 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:48:25,736 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:48:25,736 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:48:25,737 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:48:25,737 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:48:25,737 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:48:25,737 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:48:25,737 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:48:25,738 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:48:25,738 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:48:25,738 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:48:25,738 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:48:25,739 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:48:25,739 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:48:25,739 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:48:25,739 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:48:25,739 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:48:25,740 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:48:25,740 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:48:25,740 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:48:25,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:48:25,740 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:48:25,741 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:48:25,741 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:48:25,741 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:48:25,741 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:48:25,741 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:48:25,741 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:48:25,742 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:48:25,742 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:48:25,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:48:25,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:48:25,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:48:25,813 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:48:25,813 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:48:25,814 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label25_false-unreach-call.c [2018-11-12 16:48:25,871 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99884a9d7/a38eb7fcbf0942829884c2974d39b2d0/FLAGb2f8f9559 [2018-11-12 16:48:26,585 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:48:26,586 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label25_false-unreach-call.c [2018-11-12 16:48:26,606 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99884a9d7/a38eb7fcbf0942829884c2974d39b2d0/FLAGb2f8f9559 [2018-11-12 16:48:26,622 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99884a9d7/a38eb7fcbf0942829884c2974d39b2d0 [2018-11-12 16:48:26,634 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:48:26,636 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:48:26,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:48:26,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:48:26,641 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:48:26,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:48:26" (1/1) ... [2018-11-12 16:48:26,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fb9594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:26, skipping insertion in model container [2018-11-12 16:48:26,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:48:26" (1/1) ... [2018-11-12 16:48:26,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:48:26,795 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:48:27,792 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:48:27,797 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:48:28,237 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:48:28,262 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:48:28,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28 WrapperNode [2018-11-12 16:48:28,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:48:28,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:48:28,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:48:28,264 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:48:28,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (1/1) ... [2018-11-12 16:48:28,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (1/1) ... [2018-11-12 16:48:28,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:48:28,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:48:28,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:48:28,534 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:48:28,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (1/1) ... [2018-11-12 16:48:28,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (1/1) ... [2018-11-12 16:48:28,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (1/1) ... [2018-11-12 16:48:28,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (1/1) ... [2018-11-12 16:48:28,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (1/1) ... [2018-11-12 16:48:28,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (1/1) ... [2018-11-12 16:48:28,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (1/1) ... [2018-11-12 16:48:28,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:48:28,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:48:28,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:48:28,775 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:48:28,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 16:48:28,848 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:48:28,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:48:28,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:48:28,849 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-12 16:48:28,849 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-12 16:48:28,849 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:48:28,849 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:48:28,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:48:28,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:48:28,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:48:28,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:48:37,100 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:48:37,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:48:37 BoogieIcfgContainer [2018-11-12 16:48:37,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:48:37,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:48:37,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:48:37,106 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:48:37,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:48:26" (1/3) ... [2018-11-12 16:48:37,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daf7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:48:37, skipping insertion in model container [2018-11-12 16:48:37,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:28" (2/3) ... [2018-11-12 16:48:37,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daf7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:48:37, skipping insertion in model container [2018-11-12 16:48:37,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:48:37" (3/3) ... [2018-11-12 16:48:37,110 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label25_false-unreach-call.c [2018-11-12 16:48:37,120 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:48:37,129 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:48:37,148 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:48:37,194 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:48:37,194 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:48:37,194 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:48:37,194 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:48:37,194 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:48:37,195 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:48:37,195 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:48:37,195 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:48:37,255 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-12 16:48:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-12 16:48:37,261 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:48:37,262 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:48:37,264 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:48:37,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:48:37,270 INFO L82 PathProgramCache]: Analyzing trace with hash 621618756, now seen corresponding path program 1 times [2018-11-12 16:48:37,272 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:48:37,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:48:37,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:48:37,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:48:37,331 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:48:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:48:37,792 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-12 16:48:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:48:37,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:48:37,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:48:37,814 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:48:37,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:48:37,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:48:37,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:48:37,867 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-12 16:48:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:48:47,577 INFO L93 Difference]: Finished difference Result 2133 states and 3959 transitions. [2018-11-12 16:48:47,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:48:47,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-11-12 16:48:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:48:47,617 INFO L225 Difference]: With dead ends: 2133 [2018-11-12 16:48:47,617 INFO L226 Difference]: Without dead ends: 1523 [2018-11-12 16:48:47,633 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:48:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2018-11-12 16:48:47,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1516. [2018-11-12 16:48:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1516 states. [2018-11-12 16:48:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2287 transitions. [2018-11-12 16:48:47,812 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2287 transitions. Word has length 30 [2018-11-12 16:48:47,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:48:47,813 INFO L480 AbstractCegarLoop]: Abstraction has 1516 states and 2287 transitions. [2018-11-12 16:48:47,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:48:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2287 transitions. [2018-11-12 16:48:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-12 16:48:47,818 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:48:47,819 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:48:47,819 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:48:47,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:48:47,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2146255078, now seen corresponding path program 1 times [2018-11-12 16:48:47,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:48:47,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:48:47,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:48:47,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:48:47,822 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:48:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:48:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:48:48,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:48:48,222 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:48:48,223 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 106 with the following transitions: [2018-11-12 16:48:48,225 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:48:48,272 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:48:48,272 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:48:48,729 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:48:49,437 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:48:49,439 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Performed 3923 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3923 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 16:48:49,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:48:49,472 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:48:49,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:48:49,473 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 16:48:49,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:48:49,486 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:48:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:48:49,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:49:05,962 WARN L179 SmtUtils]: Spent 15.87 s on a formula simplification. DAG size of input: 135 DAG size of output: 83 [2018-11-12 16:49:06,383 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 23 [2018-11-12 16:49:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:49:06,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:49:07,265 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-11-12 16:49:08,510 WARN L179 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-11-12 16:49:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:49:08,897 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-12 16:49:08,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-11-12 16:49:08,897 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:49:08,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:49:08,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:49:08,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-11-12 16:49:08,902 INFO L87 Difference]: Start difference. First operand 1516 states and 2287 transitions. Second operand 6 states. [2018-11-12 16:49:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:49:23,175 INFO L93 Difference]: Finished difference Result 5741 states and 8892 transitions. [2018-11-12 16:49:23,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-12 16:49:23,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2018-11-12 16:49:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:49:23,223 INFO L225 Difference]: With dead ends: 5741 [2018-11-12 16:49:23,224 INFO L226 Difference]: Without dead ends: 4231 [2018-11-12 16:49:23,234 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-11-12 16:49:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2018-11-12 16:49:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 4196. [2018-11-12 16:49:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4196 states. [2018-11-12 16:49:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4196 states to 4196 states and 6323 transitions. [2018-11-12 16:49:23,376 INFO L78 Accepts]: Start accepts. Automaton has 4196 states and 6323 transitions. Word has length 105 [2018-11-12 16:49:23,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:49:23,377 INFO L480 AbstractCegarLoop]: Abstraction has 4196 states and 6323 transitions. [2018-11-12 16:49:23,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:49:23,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4196 states and 6323 transitions. [2018-11-12 16:49:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-11-12 16:49:23,394 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:49:23,395 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:49:23,396 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:49:23,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:49:23,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1301430671, now seen corresponding path program 1 times [2018-11-12 16:49:23,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:49:23,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:49:23,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:49:23,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:49:23,398 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:49:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:49:23,780 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 16:49:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:49:23,872 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:49:23,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 16:49:23,872 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:49:23,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:49:23,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:49:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 16:49:23,873 INFO L87 Difference]: Start difference. First operand 4196 states and 6323 transitions. Second operand 6 states. [2018-11-12 16:49:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:49:28,709 INFO L93 Difference]: Finished difference Result 12515 states and 19754 transitions. [2018-11-12 16:49:28,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:49:28,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2018-11-12 16:49:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:49:28,765 INFO L225 Difference]: With dead ends: 12515 [2018-11-12 16:49:28,765 INFO L226 Difference]: Without dead ends: 8325 [2018-11-12 16:49:28,788 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:49:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8325 states. [2018-11-12 16:49:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8325 to 8256. [2018-11-12 16:49:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8256 states. [2018-11-12 16:49:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8256 states to 8256 states and 11989 transitions. [2018-11-12 16:49:29,025 INFO L78 Accepts]: Start accepts. Automaton has 8256 states and 11989 transitions. Word has length 172 [2018-11-12 16:49:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:49:29,026 INFO L480 AbstractCegarLoop]: Abstraction has 8256 states and 11989 transitions. [2018-11-12 16:49:29,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:49:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 8256 states and 11989 transitions. [2018-11-12 16:49:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-11-12 16:49:29,032 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:49:29,032 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 16:49:29,032 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:49:29,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:49:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1752335123, now seen corresponding path program 1 times [2018-11-12 16:49:29,033 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:49:29,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:49:29,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:49:29,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:49:29,034 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:49:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:49:29,311 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 16:49:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 47 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-12 16:49:29,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:49:29,355 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:49:29,355 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 189 with the following transitions: [2018-11-12 16:49:29,355 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1262], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:49:29,360 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:49:29,360 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:49:29,445 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:49:30,097 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:49:30,097 INFO L272 AbstractInterpreter]: Visited 92 different actions 262 times. Merged at 5 different actions 9 times. Never widened. Performed 4477 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4477 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 16:49:30,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:49:30,135 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:49:30,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:49:30,135 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 16:49:30,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:49:30,151 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:49:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:49:30,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:49:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:49:30,676 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:49:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:49:31,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:49:31,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-12 16:49:31,674 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:49:31,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:49:31,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:49:31,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-12 16:49:31,678 INFO L87 Difference]: Start difference. First operand 8256 states and 11989 transitions. Second operand 9 states. [2018-11-12 16:49:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:49:38,168 INFO L93 Difference]: Finished difference Result 20072 states and 29365 transitions. [2018-11-12 16:49:38,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 16:49:38,169 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2018-11-12 16:49:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:49:38,226 INFO L225 Difference]: With dead ends: 20072 [2018-11-12 16:49:38,227 INFO L226 Difference]: Without dead ends: 11822 [2018-11-12 16:49:38,269 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 374 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:49:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11822 states. [2018-11-12 16:49:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11822 to 11799. [2018-11-12 16:49:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11799 states. [2018-11-12 16:49:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11799 states to 11799 states and 15117 transitions. [2018-11-12 16:49:38,735 INFO L78 Accepts]: Start accepts. Automaton has 11799 states and 15117 transitions. Word has length 188 [2018-11-12 16:49:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:49:38,736 INFO L480 AbstractCegarLoop]: Abstraction has 11799 states and 15117 transitions. [2018-11-12 16:49:38,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:49:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 11799 states and 15117 transitions. [2018-11-12 16:49:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-12 16:49:38,741 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:49:38,742 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 16:49:38,742 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:49:38,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:49:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1245707981, now seen corresponding path program 1 times [2018-11-12 16:49:38,743 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:49:38,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:49:38,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:49:38,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:49:38,744 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:49:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:49:39,070 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 16:49:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 95 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-12 16:49:39,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:49:39,384 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:49:39,384 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 206 with the following transitions: [2018-11-12 16:49:39,385 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:49:39,389 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:49:39,389 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:49:39,498 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:49:40,351 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:49:40,351 INFO L272 AbstractInterpreter]: Visited 97 different actions 375 times. Merged at 7 different actions 22 times. Never widened. Performed 6378 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6378 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 16:49:40,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:49:40,389 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:49:40,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:49:40,389 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 16:49:40,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:49:40,405 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:49:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:49:40,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:49:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 16:49:40,535 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:49:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 16:49:40,702 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:49:40,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-12 16:49:40,702 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:49:40,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:49:40,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:49:40,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:49:40,712 INFO L87 Difference]: Start difference. First operand 11799 states and 15117 transitions. Second operand 3 states. [2018-11-12 16:49:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:49:43,809 INFO L93 Difference]: Finished difference Result 23592 states and 30228 transitions. [2018-11-12 16:49:43,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:49:43,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2018-11-12 16:49:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:49:43,862 INFO L225 Difference]: With dead ends: 23592 [2018-11-12 16:49:43,863 INFO L226 Difference]: Without dead ends: 11799 [2018-11-12 16:49:43,917 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 410 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:49:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11799 states. [2018-11-12 16:49:44,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11799 to 11799. [2018-11-12 16:49:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11799 states. [2018-11-12 16:49:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11799 states to 11799 states and 14360 transitions. [2018-11-12 16:49:44,159 INFO L78 Accepts]: Start accepts. Automaton has 11799 states and 14360 transitions. Word has length 205 [2018-11-12 16:49:44,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:49:44,160 INFO L480 AbstractCegarLoop]: Abstraction has 11799 states and 14360 transitions. [2018-11-12 16:49:44,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:49:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 11799 states and 14360 transitions. [2018-11-12 16:49:44,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-11-12 16:49:44,167 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:49:44,167 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:49:44,168 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:49:44,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:49:44,168 INFO L82 PathProgramCache]: Analyzing trace with hash -795953761, now seen corresponding path program 1 times [2018-11-12 16:49:44,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:49:44,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:49:44,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:49:44,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:49:44,170 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:49:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:49:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 16:49:44,777 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:49:44,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:49:44,778 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:49:44,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:49:44,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:49:44,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:49:44,779 INFO L87 Difference]: Start difference. First operand 11799 states and 14360 transitions. Second operand 4 states. [2018-11-12 16:49:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:49:50,178 INFO L93 Difference]: Finished difference Result 31548 states and 38948 transitions. [2018-11-12 16:49:50,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:49:50,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2018-11-12 16:49:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:49:50,252 INFO L225 Difference]: With dead ends: 31548 [2018-11-12 16:49:50,252 INFO L226 Difference]: Without dead ends: 19755 [2018-11-12 16:49:50,281 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:49:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19755 states. [2018-11-12 16:49:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19755 to 19742. [2018-11-12 16:49:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19742 states. [2018-11-12 16:49:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19742 states to 19742 states and 23487 transitions. [2018-11-12 16:49:50,669 INFO L78 Accepts]: Start accepts. Automaton has 19742 states and 23487 transitions. Word has length 260 [2018-11-12 16:49:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:49:50,669 INFO L480 AbstractCegarLoop]: Abstraction has 19742 states and 23487 transitions. [2018-11-12 16:49:50,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:49:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 19742 states and 23487 transitions. [2018-11-12 16:49:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-11-12 16:49:50,681 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:49:50,681 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:49:50,682 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:49:50,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:49:50,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1849561965, now seen corresponding path program 1 times [2018-11-12 16:49:50,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:49:50,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:49:50,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:49:50,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:49:50,683 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:49:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:49:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 16:49:51,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:49:51,324 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:49:51,324 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 305 with the following transitions: [2018-11-12 16:49:51,325 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1333], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:49:51,330 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:49:51,330 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:49:51,437 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:49:52,940 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:49:52,940 INFO L272 AbstractInterpreter]: Visited 109 different actions 535 times. Merged at 8 different actions 36 times. Never widened. Performed 9598 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9598 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 9 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 16:49:52,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:49:52,977 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:49:52,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:49:52,977 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 16:49:52,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:49:52,994 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:49:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:49:53,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:49:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 16:49:53,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:49:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 16:49:53,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:49:53,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-11-12 16:49:53,610 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:49:53,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:49:53,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:49:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:49:53,615 INFO L87 Difference]: Start difference. First operand 19742 states and 23487 transitions. Second operand 7 states. [2018-11-12 16:50:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:50:01,352 INFO L93 Difference]: Finished difference Result 53226 states and 64803 transitions. [2018-11-12 16:50:01,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 16:50:01,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 304 [2018-11-12 16:50:01,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:50:01,430 INFO L225 Difference]: With dead ends: 53226 [2018-11-12 16:50:01,431 INFO L226 Difference]: Without dead ends: 30365 [2018-11-12 16:50:01,472 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 609 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-12 16:50:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30365 states. [2018-11-12 16:50:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30365 to 28520. [2018-11-12 16:50:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28520 states. [2018-11-12 16:50:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28520 states to 28520 states and 32995 transitions. [2018-11-12 16:50:01,992 INFO L78 Accepts]: Start accepts. Automaton has 28520 states and 32995 transitions. Word has length 304 [2018-11-12 16:50:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:50:01,993 INFO L480 AbstractCegarLoop]: Abstraction has 28520 states and 32995 transitions. [2018-11-12 16:50:01,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:50:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 28520 states and 32995 transitions. [2018-11-12 16:50:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-11-12 16:50:02,008 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:50:02,009 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:50:02,009 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:50:02,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:50:02,010 INFO L82 PathProgramCache]: Analyzing trace with hash 228019061, now seen corresponding path program 1 times [2018-11-12 16:50:02,010 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:50:02,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:50:02,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:50:02,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:50:02,011 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:50:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:50:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-12 16:50:02,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:50:02,438 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:50:02,439 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 318 with the following transitions: [2018-11-12 16:50:02,439 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1845], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:50:02,446 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:50:02,446 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:50:02,524 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:50:04,231 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:50:04,231 INFO L272 AbstractInterpreter]: Visited 208 different actions 820 times. Merged at 7 different actions 24 times. Never widened. Performed 14729 root evaluator evaluations with a maximum evaluation depth of 6. Performed 14729 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 16:50:04,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:50:04,269 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:50:04,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:50:04,269 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:50:04,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:50:04,281 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:50:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:50:04,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:50:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-12 16:50:04,615 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:50:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:50:05,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:50:05,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-11-12 16:50:05,747 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:50:05,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:50:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:50:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:50:05,749 INFO L87 Difference]: Start difference. First operand 28520 states and 32995 transitions. Second operand 9 states. [2018-11-12 16:50:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:50:20,020 INFO L93 Difference]: Finished difference Result 78297 states and 93015 transitions. [2018-11-12 16:50:20,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-12 16:50:20,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2018-11-12 16:50:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:50:20,144 INFO L225 Difference]: With dead ends: 78297 [2018-11-12 16:50:20,144 INFO L226 Difference]: Without dead ends: 48001 [2018-11-12 16:50:20,188 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 628 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2018-11-12 16:50:20,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48001 states. [2018-11-12 16:50:20,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48001 to 44174. [2018-11-12 16:50:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44174 states. [2018-11-12 16:50:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44174 states to 44174 states and 52453 transitions. [2018-11-12 16:50:20,955 INFO L78 Accepts]: Start accepts. Automaton has 44174 states and 52453 transitions. Word has length 317 [2018-11-12 16:50:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:50:20,955 INFO L480 AbstractCegarLoop]: Abstraction has 44174 states and 52453 transitions. [2018-11-12 16:50:20,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:50:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 44174 states and 52453 transitions. [2018-11-12 16:50:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-11-12 16:50:20,986 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:50:20,986 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:50:20,987 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:50:20,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:50:20,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1636829654, now seen corresponding path program 1 times [2018-11-12 16:50:20,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:50:20,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:50:20,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:50:20,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:50:20,989 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:50:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:50:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 75 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-12 16:50:21,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:50:21,542 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:50:21,542 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 426 with the following transitions: [2018-11-12 16:50:21,543 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1376], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1845], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:50:21,547 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:50:21,548 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:50:21,667 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:50:23,441 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:50:23,441 INFO L272 AbstractInterpreter]: Visited 209 different actions 1039 times. Merged at 8 different actions 42 times. Widened at 1 different actions 1 times. Performed 18212 root evaluator evaluations with a maximum evaluation depth of 6. Performed 18212 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 9 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-12 16:50:23,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:50:23,451 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:50:23,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:50:23,451 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:50:23,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:50:23,460 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:50:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:50:23,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:50:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 16:50:23,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:50:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 16:50:24,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:50:24,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-12 16:50:24,707 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:50:24,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:50:24,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:50:24,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-11-12 16:50:24,709 INFO L87 Difference]: Start difference. First operand 44174 states and 52453 transitions. Second operand 10 states. [2018-11-12 16:50:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:50:37,699 INFO L93 Difference]: Finished difference Result 138786 states and 163387 transitions. [2018-11-12 16:50:37,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 16:50:37,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 425 [2018-11-12 16:50:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:50:37,911 INFO L225 Difference]: With dead ends: 138786 [2018-11-12 16:50:37,912 INFO L226 Difference]: Without dead ends: 69410 [2018-11-12 16:50:38,047 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 863 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2018-11-12 16:50:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69410 states. [2018-11-12 16:50:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69410 to 60717. [2018-11-12 16:50:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60717 states. [2018-11-12 16:50:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60717 states to 60717 states and 71282 transitions. [2018-11-12 16:50:39,572 INFO L78 Accepts]: Start accepts. Automaton has 60717 states and 71282 transitions. Word has length 425 [2018-11-12 16:50:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:50:39,572 INFO L480 AbstractCegarLoop]: Abstraction has 60717 states and 71282 transitions. [2018-11-12 16:50:39,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:50:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 60717 states and 71282 transitions. [2018-11-12 16:50:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-11-12 16:50:39,592 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:50:39,592 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:50:39,593 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:50:39,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:50:39,593 INFO L82 PathProgramCache]: Analyzing trace with hash 629548986, now seen corresponding path program 1 times [2018-11-12 16:50:39,593 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:50:39,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:50:39,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:50:39,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:50:39,594 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:50:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:50:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 81 proven. 269 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:50:40,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:50:40,270 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:50:40,271 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 428 with the following transitions: [2018-11-12 16:50:40,271 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1845], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:50:40,274 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:50:40,274 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:50:40,386 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:50:42,379 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:50:42,379 INFO L272 AbstractInterpreter]: Visited 209 different actions 1243 times. Merged at 8 different actions 47 times. Widened at 1 different actions 2 times. Performed 25893 root evaluator evaluations with a maximum evaluation depth of 6. Performed 25893 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 9 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-12 16:50:42,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:50:42,389 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:50:42,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:50:42,389 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:50:42,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:50:42,397 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:50:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:50:42,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:50:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-12 16:50:42,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:50:43,014 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2018-11-12 16:50:43,634 WARN L179 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-12 16:50:43,804 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-12 16:50:43,839 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-11-12 16:50:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 75 proven. 275 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:50:44,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:50:44,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2018-11-12 16:50:44,688 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:50:44,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-12 16:50:44,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-12 16:50:44,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:50:44,690 INFO L87 Difference]: Start difference. First operand 60717 states and 71282 transitions. Second operand 15 states. [2018-11-12 16:51:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:51:06,992 INFO L93 Difference]: Finished difference Result 154600 states and 186855 transitions. [2018-11-12 16:51:06,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-12 16:51:06,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 427 [2018-11-12 16:51:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:51:07,350 INFO L225 Difference]: With dead ends: 154600 [2018-11-12 16:51:07,351 INFO L226 Difference]: Without dead ends: 92544 [2018-11-12 16:51:07,472 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 889 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1444 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1028, Invalid=3802, Unknown=0, NotChecked=0, Total=4830 [2018-11-12 16:51:07,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92544 states. [2018-11-12 16:51:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92544 to 85204. [2018-11-12 16:51:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85204 states. [2018-11-12 16:51:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85204 states to 85204 states and 101067 transitions. [2018-11-12 16:51:09,199 INFO L78 Accepts]: Start accepts. Automaton has 85204 states and 101067 transitions. Word has length 427 [2018-11-12 16:51:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:51:09,200 INFO L480 AbstractCegarLoop]: Abstraction has 85204 states and 101067 transitions. [2018-11-12 16:51:09,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-12 16:51:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 85204 states and 101067 transitions. [2018-11-12 16:51:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-11-12 16:51:09,221 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:51:09,221 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:51:09,222 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:51:09,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:09,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1016124872, now seen corresponding path program 1 times [2018-11-12 16:51:09,222 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:51:09,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:09,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:09,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:09,224 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:51:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 73 proven. 238 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 16:51:11,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:51:11,671 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:51:11,671 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 471 with the following transitions: [2018-11-12 16:51:11,671 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1626], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1845], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:51:11,674 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:51:11,675 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:51:11,723 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:51:13,213 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:51:13,213 INFO L272 AbstractInterpreter]: Visited 209 different actions 1035 times. Merged at 8 different actions 38 times. Never widened. Performed 18781 root evaluator evaluations with a maximum evaluation depth of 6. Performed 18781 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 9 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 16:51:13,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:13,252 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:51:13,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:51:13,252 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:51:13,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:13,267 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:51:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:13,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:51:14,360 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 17 [2018-11-12 16:51:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 75 proven. 295 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-12 16:51:15,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:51:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 16:51:15,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:51:15,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 5] total 21 [2018-11-12 16:51:15,939 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:51:15,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:51:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:51:15,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2018-11-12 16:51:15,943 INFO L87 Difference]: Start difference. First operand 85204 states and 101067 transitions. Second operand 18 states. [2018-11-12 16:51:40,445 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-12 16:51:45,069 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 32 Received shutdown request... [2018-11-12 16:52:13,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-11-12 16:52:13,032 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:52:13,037 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:52:13,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:52:13 BoogieIcfgContainer [2018-11-12 16:52:13,037 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:52:13,038 INFO L168 Benchmark]: Toolchain (without parser) took 226403.66 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -629.5 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-11-12 16:52:13,039 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. [2018-11-12 16:52:13,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1626.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-11-12 16:52:13,040 INFO L168 Benchmark]: Boogie Procedure Inliner took 269.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 788.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -971.2 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2018-11-12 16:52:13,041 INFO L168 Benchmark]: Boogie Preprocessor took 240.57 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2018-11-12 16:52:13,042 INFO L168 Benchmark]: RCFGBuilder took 8326.79 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 469.8 MB). Peak memory consumption was 469.8 MB. Max. memory is 7.1 GB. [2018-11-12 16:52:13,043 INFO L168 Benchmark]: TraceAbstraction took 215934.86 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.8 GB in the beginning and 2.0 GB in the end (delta: -279.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-12 16:52:13,048 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 1626.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 269.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 788.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -971.2 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 240.57 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8326.79 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 469.8 MB). Peak memory consumption was 469.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215934.86 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.8 GB in the beginning and 2.0 GB in the end (delta: -279.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 77). Cancelled while BasicCegarLoop was constructing difference of abstraction (85204states) and FLOYD_HOARE automaton (currently 163 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (76685 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 215.8s OverallTime, 11 OverallIterations, 4 TraceHistogramMax, 159.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3925 SDtfs, 47917 SDslu, 6672 SDs, 0 SdLazy, 84425 SolverSat, 13610 SolverUnsat, 606 SolverUnknown, 0 SolverNotchecked, 126.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5286 GetRequests, 4920 SyntacticMatches, 20 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13962 ImplicationChecksByTransitivity, 34.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85204occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 12.1s AbstIntTime, 8 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 21852 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 33.7s InterpolantComputationTime, 5344 NumberOfCodeBlocks, 5344 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 7758 ConstructedInterpolants, 316 QuantifiedInterpolants, 13702008 SizeOfPredicates, 16 NumberOfNonLiveVariables, 4124 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 4247/5701 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown