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_label33_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:20:17,568 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:20:17,570 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:20:17,587 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:20:17,588 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:20:17,589 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:20:17,590 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:20:17,595 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:20:17,597 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:20:17,598 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:20:17,599 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:20:17,599 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:20:17,600 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:20:17,601 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:20:17,603 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:20:17,603 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:20:17,604 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:20:17,606 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:20:17,608 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:20:17,610 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:20:17,611 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:20:17,613 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:20:17,615 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:20:17,616 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:20:17,616 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:20:17,617 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:20:17,618 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:20:17,619 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:20:17,620 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:20:17,621 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:20:17,622 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:20:17,622 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:20:17,623 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:20:17,623 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:20:17,624 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:20:17,625 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:20:17,625 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 [2018-11-07 18:20:17,641 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:20:17,641 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:20:17,642 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:20:17,642 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:20:17,643 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:20:17,643 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:20:17,643 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:20:17,643 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:20:17,643 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:20:17,644 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:20:17,644 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:20:17,644 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:20:17,644 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:20:17,645 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:20:17,645 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:20:17,645 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:20:17,645 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:20:17,646 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:20:17,646 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:20:17,646 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:20:17,646 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:20:17,646 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:20:17,647 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:20:17,647 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:20:17,647 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:20:17,647 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:20:17,648 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:20:17,648 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:20:17,648 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:20:17,648 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:20:17,648 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:20:17,648 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:20:17,649 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:20:17,649 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:20:17,649 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:20:17,699 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:20:17,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:20:17,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:20:17,723 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:20:17,724 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:20:17,725 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label33_false-unreach-call.c [2018-11-07 18:20:17,793 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200c41b35/325028138ec5464fb22f5aad5bbd0adf/FLAG9b52500d7 [2018-11-07 18:20:18,504 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:20:18,505 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label33_false-unreach-call.c [2018-11-07 18:20:18,527 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200c41b35/325028138ec5464fb22f5aad5bbd0adf/FLAG9b52500d7 [2018-11-07 18:20:18,542 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200c41b35/325028138ec5464fb22f5aad5bbd0adf [2018-11-07 18:20:18,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:20:18,556 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:20:18,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:20:18,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:20:18,564 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:20:18,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:20:18" (1/1) ... [2018-11-07 18:20:18,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b330f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:18, skipping insertion in model container [2018-11-07 18:20:18,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:20:18" (1/1) ... [2018-11-07 18:20:18,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:20:18,713 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:20:19,689 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:20:19,694 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:20:20,135 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:20:20,159 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:20:20,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20 WrapperNode [2018-11-07 18:20:20,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:20:20,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:20:20,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:20:20,161 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:20:20,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (1/1) ... [2018-11-07 18:20:20,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (1/1) ... [2018-11-07 18:20:20,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:20:20,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:20:20,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:20:20,422 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:20:20,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (1/1) ... [2018-11-07 18:20:20,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (1/1) ... [2018-11-07 18:20:20,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (1/1) ... [2018-11-07 18:20:20,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (1/1) ... [2018-11-07 18:20:20,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (1/1) ... [2018-11-07 18:20:20,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (1/1) ... [2018-11-07 18:20:20,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (1/1) ... [2018-11-07 18:20:20,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:20:20,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:20:20,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:20:20,632 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:20:20,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (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 [2018-11-07 18:20:20,703 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:20:20,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:20:20,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:20:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 18:20:20,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 18:20:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:20:20,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:20:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:20:20,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:20:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:20:20,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:20:30,276 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:20:30,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:20:30 BoogieIcfgContainer [2018-11-07 18:20:30,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:20:30,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:20:30,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:20:30,283 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:20:30,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:20:18" (1/3) ... [2018-11-07 18:20:30,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c004c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:20:30, skipping insertion in model container [2018-11-07 18:20:30,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:20:20" (2/3) ... [2018-11-07 18:20:30,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c004c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:20:30, skipping insertion in model container [2018-11-07 18:20:30,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:20:30" (3/3) ... [2018-11-07 18:20:30,287 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label33_false-unreach-call.c [2018-11-07 18:20:30,298 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:20:30,308 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:20:30,329 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:20:30,376 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:20:30,377 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:20:30,377 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:20:30,377 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:20:30,377 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:20:30,377 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:20:30,378 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:20:30,378 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:20:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 18:20:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-07 18:20:30,423 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:20:30,424 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] [2018-11-07 18:20:30,427 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:20:30,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash 137132598, now seen corresponding path program 1 times [2018-11-07 18:20:30,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:20:30,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:30,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:30,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:30,489 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:20:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:20:30,955 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:20:30,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:20:30,956 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:20:30,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:20:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:20:30,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:20:30,982 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 18:20:39,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:20:39,969 INFO L93 Difference]: Finished difference Result 2142 states and 3971 transitions. [2018-11-07 18:20:39,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:20:39,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-11-07 18:20:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:20:40,003 INFO L225 Difference]: With dead ends: 2142 [2018-11-07 18:20:40,004 INFO L226 Difference]: Without dead ends: 1532 [2018-11-07 18:20:40,022 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 [2018-11-07 18:20:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2018-11-07 18:20:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1519. [2018-11-07 18:20:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1519 states. [2018-11-07 18:20:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2456 transitions. [2018-11-07 18:20:40,227 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2456 transitions. Word has length 23 [2018-11-07 18:20:40,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:20:40,227 INFO L480 AbstractCegarLoop]: Abstraction has 1519 states and 2456 transitions. [2018-11-07 18:20:40,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:20:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2456 transitions. [2018-11-07 18:20:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-11-07 18:20:40,237 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:20:40,237 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:20:40,238 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:20:40,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:40,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2044944537, now seen corresponding path program 1 times [2018-11-07 18:20:40,238 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:20:40,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:40,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:40,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:40,243 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:20:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:20:40,566 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:20:40,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 18:20:40,566 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:20:40,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 18:20:40,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 18:20:40,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 18:20:40,569 INFO L87 Difference]: Start difference. First operand 1519 states and 2456 transitions. Second operand 5 states. [2018-11-07 18:20:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:20:47,298 INFO L93 Difference]: Finished difference Result 4424 states and 7338 transitions. [2018-11-07 18:20:47,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:20:47,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2018-11-07 18:20:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:20:47,328 INFO L225 Difference]: With dead ends: 4424 [2018-11-07 18:20:47,329 INFO L226 Difference]: Without dead ends: 2911 [2018-11-07 18:20:47,335 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:20:47,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2018-11-07 18:20:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2875. [2018-11-07 18:20:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2875 states. [2018-11-07 18:20:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 4373 transitions. [2018-11-07 18:20:47,439 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 4373 transitions. Word has length 95 [2018-11-07 18:20:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:20:47,440 INFO L480 AbstractCegarLoop]: Abstraction has 2875 states and 4373 transitions. [2018-11-07 18:20:47,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 18:20:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 4373 transitions. [2018-11-07 18:20:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-07 18:20:47,444 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:20:47,444 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:20:47,445 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:20:47,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:47,445 INFO L82 PathProgramCache]: Analyzing trace with hash -552688383, now seen corresponding path program 1 times [2018-11-07 18:20:47,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:20:47,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:47,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:47,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:47,447 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:20:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:20:47,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:20:47,710 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:20:47,711 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 99 with the following transitions: [2018-11-07 18:20:47,714 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [794], [796], [799], [807], [815], [823], [831], [839], [847], [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] [2018-11-07 18:20:47,761 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:20:47,761 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:20:48,207 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:20:48,903 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:20:48,904 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 18:20:48,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:48,950 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:20:48,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:20:48,951 INFO L194 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 [2018-11-07 18:20:48,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:48,967 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:20:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:49,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:21:05,019 WARN L179 SmtUtils]: Spent 15.50 s on a formula simplification. DAG size of input: 135 DAG size of output: 83 [2018-11-07 18:21:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:21:05,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:21:05,789 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-11-07 18:21:07,068 WARN L179 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-11-07 18:21:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:21:07,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 18:21:07,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-11-07 18:21:07,491 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:21:07,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:21:07,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:21:07,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:21:07,492 INFO L87 Difference]: Start difference. First operand 2875 states and 4373 transitions. Second operand 6 states. [2018-11-07 18:21:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:21:24,302 INFO L93 Difference]: Finished difference Result 11152 states and 17729 transitions. [2018-11-07 18:21:24,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 18:21:24,303 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2018-11-07 18:21:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:21:24,368 INFO L225 Difference]: With dead ends: 11152 [2018-11-07 18:21:24,368 INFO L226 Difference]: Without dead ends: 8283 [2018-11-07 18:21:24,391 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:21:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2018-11-07 18:21:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 8238. [2018-11-07 18:21:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8238 states. [2018-11-07 18:21:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8238 states to 8238 states and 12717 transitions. [2018-11-07 18:21:24,649 INFO L78 Accepts]: Start accepts. Automaton has 8238 states and 12717 transitions. Word has length 98 [2018-11-07 18:21:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:21:24,650 INFO L480 AbstractCegarLoop]: Abstraction has 8238 states and 12717 transitions. [2018-11-07 18:21:24,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:21:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 8238 states and 12717 transitions. [2018-11-07 18:21:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-07 18:21:24,662 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:21:24,663 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:21:24,663 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:21:24,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash -317243459, now seen corresponding path program 1 times [2018-11-07 18:21:24,663 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:21:24,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:24,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:24,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:24,668 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:21:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:21:25,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:21:25,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:21:25,035 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:21:25,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:21:25,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:21:25,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:21:25,037 INFO L87 Difference]: Start difference. First operand 8238 states and 12717 transitions. Second operand 6 states. [2018-11-07 18:21:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:21:29,373 INFO L93 Difference]: Finished difference Result 19678 states and 30769 transitions. [2018-11-07 18:21:29,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:21:29,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2018-11-07 18:21:29,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:21:29,458 INFO L225 Difference]: With dead ends: 19678 [2018-11-07 18:21:29,459 INFO L226 Difference]: Without dead ends: 11446 [2018-11-07 18:21:29,501 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:21:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11446 states. [2018-11-07 18:21:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11446 to 11368. [2018-11-07 18:21:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11368 states. [2018-11-07 18:21:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11368 states to 11368 states and 15056 transitions. [2018-11-07 18:21:29,816 INFO L78 Accepts]: Start accepts. Automaton has 11368 states and 15056 transitions. Word has length 173 [2018-11-07 18:21:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:21:29,817 INFO L480 AbstractCegarLoop]: Abstraction has 11368 states and 15056 transitions. [2018-11-07 18:21:29,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:21:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 11368 states and 15056 transitions. [2018-11-07 18:21:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-07 18:21:29,821 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:21:29,821 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:21:29,821 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:21:29,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash -318686824, now seen corresponding path program 1 times [2018-11-07 18:21:29,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:21:29,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:29,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:29,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:29,823 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:21:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:30,152 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:21:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 18:21:30,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:30,911 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:21:30,911 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 191 with the following transitions: [2018-11-07 18:21:30,912 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [794], [796], [799], [807], [815], [823], [831], [839], [847], [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], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:21:30,918 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:21:30,919 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:21:31,049 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:21:31,906 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:21:31,907 INFO L272 AbstractInterpreter]: Visited 97 different actions 378 times. Merged at 7 different actions 25 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 18:21:31,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:31,950 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:21:31,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:31,950 INFO L194 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 [2018-11-07 18:21:31,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:31,962 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:21:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:32,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:21:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-07 18:21:32,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:21:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-07 18:21:32,487 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:21:32,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-07 18:21:32,487 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:21:32,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:21:32,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:21:32,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:21:32,489 INFO L87 Difference]: Start difference. First operand 11368 states and 15056 transitions. Second operand 3 states. [2018-11-07 18:21:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:21:35,278 INFO L93 Difference]: Finished difference Result 22730 states and 30174 transitions. [2018-11-07 18:21:35,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:21:35,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2018-11-07 18:21:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:21:35,353 INFO L225 Difference]: With dead ends: 22730 [2018-11-07 18:21:35,353 INFO L226 Difference]: Without dead ends: 11368 [2018-11-07 18:21:35,398 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 380 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:21:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11368 states. [2018-11-07 18:21:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11368 to 11368. [2018-11-07 18:21:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11368 states. [2018-11-07 18:21:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11368 states to 11368 states and 14324 transitions. [2018-11-07 18:21:35,614 INFO L78 Accepts]: Start accepts. Automaton has 11368 states and 14324 transitions. Word has length 190 [2018-11-07 18:21:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:21:35,614 INFO L480 AbstractCegarLoop]: Abstraction has 11368 states and 14324 transitions. [2018-11-07 18:21:35,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:21:35,615 INFO L276 IsEmpty]: Start isEmpty. Operand 11368 states and 14324 transitions. [2018-11-07 18:21:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-11-07 18:21:35,623 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:21:35,629 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:21:35,629 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:21:35,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:35,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2077464317, now seen corresponding path program 1 times [2018-11-07 18:21:35,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:21:35,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:35,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:35,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:35,632 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:21:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 216 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-07 18:21:35,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:35,965 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:21:35,966 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 290 with the following transitions: [2018-11-07 18:21:35,966 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [794], [796], [799], [807], [815], [823], [831], [839], [847], [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], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [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] [2018-11-07 18:21:35,970 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:21:35,971 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:21:36,116 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:21:37,509 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:21:37,510 INFO L272 AbstractInterpreter]: Visited 109 different actions 645 times. Merged at 8 different actions 48 times. Widened at 1 different actions 1 times. Found 11 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 18:21:37,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:37,548 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:21:37,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:37,548 INFO L194 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 [2018-11-07 18:21:37,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:37,565 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:21:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:37,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:21:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 216 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-07 18:21:38,027 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:21:38,281 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 18:21:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 216 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-07 18:21:38,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:21:38,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-07 18:21:38,744 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:21:38,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:21:38,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:21:38,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:21:38,746 INFO L87 Difference]: Start difference. First operand 11368 states and 14324 transitions. Second operand 6 states. [2018-11-07 18:21:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:21:49,389 INFO L93 Difference]: Finished difference Result 34651 states and 46579 transitions. [2018-11-07 18:21:49,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:21:49,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 289 [2018-11-07 18:21:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:21:49,491 INFO L225 Difference]: With dead ends: 34651 [2018-11-07 18:21:49,491 INFO L226 Difference]: Without dead ends: 23289 [2018-11-07 18:21:49,535 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 580 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-11-07 18:21:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23289 states. [2018-11-07 18:21:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23289 to 22365. [2018-11-07 18:21:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22365 states. [2018-11-07 18:21:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22365 states to 22365 states and 26726 transitions. [2018-11-07 18:21:50,386 INFO L78 Accepts]: Start accepts. Automaton has 22365 states and 26726 transitions. Word has length 289 [2018-11-07 18:21:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:21:50,387 INFO L480 AbstractCegarLoop]: Abstraction has 22365 states and 26726 transitions. [2018-11-07 18:21:50,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:21:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 22365 states and 26726 transitions. [2018-11-07 18:21:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-11-07 18:21:50,402 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:21:50,403 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:21:50,403 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:21:50,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:50,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1119080016, now seen corresponding path program 1 times [2018-11-07 18:21:50,404 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:21:50,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:50,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:50,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:50,405 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:21:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:50,907 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-11-07 18:21:51,443 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2018-11-07 18:21:51,940 WARN L179 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-11-07 18:21:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 16 proven. 207 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-11-07 18:21:52,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:52,245 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:21:52,245 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 308 with the following transitions: [2018-11-07 18:21:52,246 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [794], [796], [799], [807], [815], [823], [831], [839], [847], [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], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1333], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:21:52,250 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:21:52,250 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:21:52,309 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:21:52,817 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:21:52,817 INFO L272 AbstractInterpreter]: Visited 120 different actions 346 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 18:21:52,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:52,855 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:21:52,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:52,855 INFO L194 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 [2018-11-07 18:21:52,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:52,873 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:21:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:52,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:21:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-07 18:21:53,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:21:54,133 WARN L179 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-11-07 18:21:54,291 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2018-11-07 18:21:54,427 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-11-07 18:21:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 126 proven. 98 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 18:21:54,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:21:54,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 19 [2018-11-07 18:21:54,878 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:21:54,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:21:54,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:21:54,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:21:54,879 INFO L87 Difference]: Start difference. First operand 22365 states and 26726 transitions. Second operand 18 states. [2018-11-07 18:22:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:22:26,038 INFO L93 Difference]: Finished difference Result 83782 states and 101453 transitions. [2018-11-07 18:22:26,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-11-07 18:22:26,039 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 307 [2018-11-07 18:22:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:22:26,255 INFO L225 Difference]: With dead ends: 83782 [2018-11-07 18:22:26,256 INFO L226 Difference]: Without dead ends: 56713 [2018-11-07 18:22:26,352 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 640 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1298, Invalid=5344, Unknown=0, NotChecked=0, Total=6642 [2018-11-07 18:22:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56713 states. [2018-11-07 18:22:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56713 to 53179. [2018-11-07 18:22:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53179 states. [2018-11-07 18:22:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53179 states to 53179 states and 62845 transitions. [2018-11-07 18:22:27,775 INFO L78 Accepts]: Start accepts. Automaton has 53179 states and 62845 transitions. Word has length 307 [2018-11-07 18:22:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:22:27,775 INFO L480 AbstractCegarLoop]: Abstraction has 53179 states and 62845 transitions. [2018-11-07 18:22:27,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:22:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 53179 states and 62845 transitions. [2018-11-07 18:22:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-11-07 18:22:27,797 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:22:27,797 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:22:27,797 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:22:27,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:22:27,798 INFO L82 PathProgramCache]: Analyzing trace with hash 490104554, now seen corresponding path program 1 times [2018-11-07 18:22:27,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:22:27,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:22:27,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:22:27,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:22:27,800 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:22:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:22:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:22:28,231 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:22:28,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:22:28,231 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:22:28,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:22:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:22:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:22:28,233 INFO L87 Difference]: Start difference. First operand 53179 states and 62845 transitions. Second operand 4 states. [2018-11-07 18:22:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:22:35,860 INFO L93 Difference]: Finished difference Result 126073 states and 152381 transitions. [2018-11-07 18:22:35,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:22:35,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2018-11-07 18:22:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:22:36,118 INFO L225 Difference]: With dead ends: 126073 [2018-11-07 18:22:36,118 INFO L226 Difference]: Without dead ends: 72900 [2018-11-07 18:22:36,297 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 [2018-11-07 18:22:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72900 states. [2018-11-07 18:22:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72900 to 69391. [2018-11-07 18:22:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69391 states. [2018-11-07 18:22:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69391 states to 69391 states and 81118 transitions. [2018-11-07 18:22:38,102 INFO L78 Accepts]: Start accepts. Automaton has 69391 states and 81118 transitions. Word has length 340 [2018-11-07 18:22:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:22:38,103 INFO L480 AbstractCegarLoop]: Abstraction has 69391 states and 81118 transitions. [2018-11-07 18:22:38,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:22:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 69391 states and 81118 transitions. [2018-11-07 18:22:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-11-07 18:22:38,123 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:22:38,124 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:22:38,124 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:22:38,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:22:38,125 INFO L82 PathProgramCache]: Analyzing trace with hash 752749883, now seen corresponding path program 1 times [2018-11-07 18:22:38,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:22:38,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:22:38,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:22:38,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:22:38,126 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:22:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:22:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:22:38,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:22:38,587 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:22:38,588 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 347 with the following transitions: [2018-11-07 18:22:38,588 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [794], [796], [799], [807], [815], [823], [831], [839], [847], [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], [1270], [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], [1600], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:22:38,592 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:22:38,592 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:22:38,696 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:22:40,310 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:22:40,310 INFO L272 AbstractInterpreter]: Visited 160 different actions 941 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 18:22:40,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:22:40,348 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:22:40,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:22:40,348 INFO L194 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 [2018-11-07 18:22:40,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:22:40,361 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:22:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:22:40,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:22:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:22:40,552 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:22:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:22:40,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:22:40,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-11-07 18:22:40,787 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:22:40,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:22:40,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:22:40,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:22:40,789 INFO L87 Difference]: Start difference. First operand 69391 states and 81118 transitions. Second operand 7 states. [2018-11-07 18:22:48,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:22:48,595 INFO L93 Difference]: Finished difference Result 182030 states and 215847 transitions. [2018-11-07 18:22:48,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:22:48,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 346 [2018-11-07 18:22:48,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:22:48,879 INFO L225 Difference]: With dead ends: 182030 [2018-11-07 18:22:48,879 INFO L226 Difference]: Without dead ends: 91290 [2018-11-07 18:22:49,168 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 695 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:22:49,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91290 states. [2018-11-07 18:22:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91290 to 82143. [2018-11-07 18:22:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82143 states. [2018-11-07 18:22:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82143 states to 82143 states and 94213 transitions. [2018-11-07 18:22:50,705 INFO L78 Accepts]: Start accepts. Automaton has 82143 states and 94213 transitions. Word has length 346 [2018-11-07 18:22:50,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:22:50,706 INFO L480 AbstractCegarLoop]: Abstraction has 82143 states and 94213 transitions. [2018-11-07 18:22:50,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:22:50,706 INFO L276 IsEmpty]: Start isEmpty. Operand 82143 states and 94213 transitions. [2018-11-07 18:22:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-11-07 18:22:50,729 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:22:50,730 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:22:50,730 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:22:50,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:22:50,730 INFO L82 PathProgramCache]: Analyzing trace with hash 655261742, now seen corresponding path program 1 times [2018-11-07 18:22:50,730 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:22:50,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:22:50,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:22:50,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:22:50,732 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:22:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:22:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-07 18:22:51,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:22:51,315 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:22:51,315 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 377 with the following transitions: [2018-11-07 18:22:51,316 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [794], [796], [799], [807], [815], [823], [831], [839], [847], [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], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2158], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:22:51,322 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:22:51,322 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:22:51,382 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:22:54,731 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:22:54,732 INFO L272 AbstractInterpreter]: Visited 274 different actions 1896 times. Merged at 7 different actions 47 times. Widened at 1 different actions 2 times. Found 7 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 18:22:54,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:22:54,759 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:22:54,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:22:54,759 INFO L194 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 [2018-11-07 18:22:54,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:22:54,772 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:22:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:22:54,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:22:55,205 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-11-07 18:22:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-07 18:22:55,508 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:22:55,662 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:22:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 37 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:22:57,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:22:57,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-11-07 18:22:57,188 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:22:57,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:22:57,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:22:57,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:22:57,190 INFO L87 Difference]: Start difference. First operand 82143 states and 94213 transitions. Second operand 9 states. [2018-11-07 18:23:13,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:23:13,094 INFO L93 Difference]: Finished difference Result 228245 states and 267780 transitions. [2018-11-07 18:23:13,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-07 18:23:13,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 376 [2018-11-07 18:23:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:23:13,463 INFO L225 Difference]: With dead ends: 228245 [2018-11-07 18:23:13,463 INFO L226 Difference]: Without dead ends: 135724 [2018-11-07 18:23:13,677 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 746 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2018-11-07 18:23:13,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135724 states. [2018-11-07 18:23:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135724 to 128186. [2018-11-07 18:23:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128186 states. [2018-11-07 18:23:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128186 states to 128186 states and 148006 transitions. [2018-11-07 18:23:16,039 INFO L78 Accepts]: Start accepts. Automaton has 128186 states and 148006 transitions. Word has length 376 [2018-11-07 18:23:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:23:16,040 INFO L480 AbstractCegarLoop]: Abstraction has 128186 states and 148006 transitions. [2018-11-07 18:23:16,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:23:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 128186 states and 148006 transitions. [2018-11-07 18:23:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2018-11-07 18:23:16,075 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:23:16,075 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:23:16,076 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:23:16,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:23:16,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1716882144, now seen corresponding path program 1 times [2018-11-07 18:23:16,076 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:23:16,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:16,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:23:16,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:16,078 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:23:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:23:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2018-11-07 18:23:16,623 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:23:16,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:23:16,624 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:23:16,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:23:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:23:16,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:23:16,625 INFO L87 Difference]: Start difference. First operand 128186 states and 148006 transitions. Second operand 4 states. [2018-11-07 18:23:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:23:25,876 INFO L93 Difference]: Finished difference Result 311437 states and 363738 transitions. [2018-11-07 18:23:25,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:23:25,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2018-11-07 18:23:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:23:26,176 INFO L225 Difference]: With dead ends: 311437 [2018-11-07 18:23:26,177 INFO L226 Difference]: Without dead ends: 146610 [2018-11-07 18:23:26,368 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 [2018-11-07 18:23:26,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146610 states. [2018-11-07 18:23:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146610 to 135022. [2018-11-07 18:23:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135022 states. [2018-11-07 18:23:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135022 states to 135022 states and 153930 transitions. [2018-11-07 18:23:27,933 INFO L78 Accepts]: Start accepts. Automaton has 135022 states and 153930 transitions. Word has length 501 [2018-11-07 18:23:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:23:27,934 INFO L480 AbstractCegarLoop]: Abstraction has 135022 states and 153930 transitions. [2018-11-07 18:23:27,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:23:27,934 INFO L276 IsEmpty]: Start isEmpty. Operand 135022 states and 153930 transitions. [2018-11-07 18:23:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2018-11-07 18:23:27,953 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:23:27,953 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:23:27,954 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:23:27,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:23:27,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1798628670, now seen corresponding path program 1 times [2018-11-07 18:23:27,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:23:27,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:27,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:23:27,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:27,955 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:23:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:23:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 56 proven. 293 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:23:30,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:23:30,062 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:23:30,063 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 507 with the following transitions: [2018-11-07 18:23:30,063 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [794], [796], [799], [807], [815], [823], [831], [839], [847], [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], [1478], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2158], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:23:30,068 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:23:30,068 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:23:30,123 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:23:32,852 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:23:32,852 INFO L272 AbstractInterpreter]: Visited 275 different actions 1911 times. Merged at 8 different actions 56 times. Widened at 1 different actions 2 times. Found 13 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 18:23:32,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:23:32,859 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:23:32,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:23:32,859 INFO L194 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 [2018-11-07 18:23:32,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:23:32,868 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:23:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:23:33,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:23:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 82 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:23:34,258 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:23:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:23:35,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:23:35,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 5] total 27 [2018-11-07 18:23:35,398 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:23:35,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-07 18:23:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-07 18:23:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2018-11-07 18:23:35,401 INFO L87 Difference]: Start difference. First operand 135022 states and 153930 transitions. Second operand 25 states. [2018-11-07 18:23:37,197 WARN L179 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-11-07 18:23:41,598 WARN L179 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2018-11-07 18:23:41,981 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2018-11-07 18:23:44,148 WARN L179 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2018-11-07 18:23:45,689 WARN L179 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2018-11-07 18:23:47,376 WARN L179 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2018-11-07 18:23:48,462 WARN L179 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2018-11-07 18:23:49,379 WARN L179 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2018-11-07 18:23:56,802 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-11-07 18:23:59,185 WARN L179 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2018-11-07 18:24:00,180 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-11-07 18:24:00,888 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2018-11-07 18:24:03,098 WARN L179 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 74 DAG size of output: 60 Received shutdown request... [2018-11-07 18:24:03,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-07 18:24:03,442 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:24:03,446 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:24:03,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:24:03 BoogieIcfgContainer [2018-11-07 18:24:03,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:24:03,448 INFO L168 Benchmark]: Toolchain (without parser) took 224893.28 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 267.8 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-11-07 18:24:03,449 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-11-07 18:24:03,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1603.04 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. [2018-11-07 18:24:03,450 INFO L168 Benchmark]: Boogie Procedure Inliner took 261.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 781.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -963.5 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:24:03,451 INFO L168 Benchmark]: Boogie Preprocessor took 209.32 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2018-11-07 18:24:03,452 INFO L168 Benchmark]: RCFGBuilder took 9645.88 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: 459.8 MB). Peak memory consumption was 459.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:24:03,453 INFO L168 Benchmark]: TraceAbstraction took 213168.21 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.8 GB in the beginning and 1.1 GB in the end (delta: 620.0 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-11-07 18:24:03,458 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 1603.04 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 261.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 781.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -963.5 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 209.32 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9645.88 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: 459.8 MB). Peak memory consumption was 459.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 213168.21 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.8 GB in the beginning and 1.1 GB in the end (delta: 620.0 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 56). Cancelled while BasicCegarLoop was constructing difference of abstraction (135022states) and FLOYD_HOARE automaton (currently 54 states, 25 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 74 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 213.0s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 153.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4143 SDtfs, 55269 SDslu, 4464 SDs, 0 SdLazy, 58737 SolverSat, 14417 SolverUnsat, 70 SolverUnknown, 0 SolverNotchecked, 114.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4541 GetRequests, 4278 SyntacticMatches, 27 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4013 ImplicationChecksByTransitivity, 37.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135022occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 12.4s AbstIntTime, 7 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 10.6s AutomataMinimizationTime, 11 MinimizatonAttempts, 36412 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 32.6s InterpolantComputationTime, 5356 NumberOfCodeBlocks, 5356 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 7442 ConstructedInterpolants, 204 QuantifiedInterpolants, 17170025 SizeOfPredicates, 16 NumberOfNonLiveVariables, 3593 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 26 InterpolantComputations, 8 PerfectInterpolantSequences, 4018/5043 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown