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/Problem11_label24_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 18:38:37,595 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 18:38:37,597 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 18:38:37,609 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 18:38:37,609 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 18:38:37,610 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 18:38:37,612 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 18:38:37,613 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 18:38:37,615 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 18:38:37,617 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 18:38:37,620 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 18:38:37,620 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 18:38:37,621 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 18:38:37,622 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 18:38:37,629 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 18:38:37,629 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 18:38:37,630 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 18:38:37,635 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 18:38:37,639 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 18:38:37,641 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 18:38:37,643 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 18:38:37,644 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 18:38:37,649 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 18:38:37,653 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 18:38:37,653 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 18:38:37,654 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 18:38:37,655 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 18:38:37,657 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 18:38:37,658 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 18:38:37,659 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 18:38:37,659 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 18:38:37,660 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 18:38:37,661 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 18:38:37,661 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 18:38:37,662 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 18:38:37,663 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 18:38:37,663 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 18:38:37,686 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 18:38:37,687 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 18:38:37,687 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 18:38:37,691 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 18:38:37,691 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 18:38:37,691 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 18:38:37,691 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 18:38:37,692 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 18:38:37,692 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 18:38:37,692 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 18:38:37,692 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 18:38:37,692 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 18:38:37,692 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 18:38:37,693 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 18:38:37,693 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 18:38:37,694 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 18:38:37,695 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 18:38:37,695 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 18:38:37,695 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 18:38:37,695 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 18:38:37,695 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 18:38:37,696 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 18:38:37,696 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 18:38:37,696 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 18:38:37,696 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 18:38:37,696 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:38:37,697 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 18:38:37,698 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 18:38:37,698 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 18:38:37,698 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 18:38:37,698 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 18:38:37,699 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 18:38:37,699 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 18:38:37,699 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 18:38:37,699 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 18:38:37,749 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 18:38:37,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 18:38:37,765 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 18:38:37,767 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 18:38:37,767 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 18:38:37,768 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label24_true-unreach-call.c [2018-11-12 18:38:37,830 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2d535cb/0152f1415bd6429681677151cd4cd0f2/FLAG440f67f1b [2018-11-12 18:38:38,427 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 18:38:38,428 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label24_true-unreach-call.c [2018-11-12 18:38:38,444 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2d535cb/0152f1415bd6429681677151cd4cd0f2/FLAG440f67f1b [2018-11-12 18:38:38,467 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2d535cb/0152f1415bd6429681677151cd4cd0f2 [2018-11-12 18:38:38,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 18:38:38,482 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 18:38:38,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 18:38:38,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 18:38:38,487 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 18:38:38,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:38:38" (1/1) ... [2018-11-12 18:38:38,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665e3473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:38, skipping insertion in model container [2018-11-12 18:38:38,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:38:38" (1/1) ... [2018-11-12 18:38:38,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 18:38:38,592 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 18:38:39,160 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:38:39,168 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 18:38:39,377 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:38:39,398 INFO L193 MainTranslator]: Completed translation [2018-11-12 18:38:39,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39 WrapperNode [2018-11-12 18:38:39,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 18:38:39,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 18:38:39,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 18:38:39,400 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 18:38:39,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (1/1) ... [2018-11-12 18:38:39,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (1/1) ... [2018-11-12 18:38:39,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 18:38:39,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 18:38:39,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 18:38:39,566 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 18:38:39,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (1/1) ... [2018-11-12 18:38:39,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (1/1) ... [2018-11-12 18:38:39,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (1/1) ... [2018-11-12 18:38:39,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (1/1) ... [2018-11-12 18:38:39,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (1/1) ... [2018-11-12 18:38:39,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (1/1) ... [2018-11-12 18:38:39,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (1/1) ... [2018-11-12 18:38:39,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 18:38:39,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 18:38:39,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 18:38:39,704 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 18:38:39,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:38:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 18:38:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 18:38:39,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 18:38:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 18:38:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 18:38:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 18:38:39,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 18:38:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 18:38:39,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 18:38:44,461 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 18:38:44,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:38:44 BoogieIcfgContainer [2018-11-12 18:38:44,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 18:38:44,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 18:38:44,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 18:38:44,466 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 18:38:44,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 06:38:38" (1/3) ... [2018-11-12 18:38:44,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36332428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:38:44, skipping insertion in model container [2018-11-12 18:38:44,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:38:39" (2/3) ... [2018-11-12 18:38:44,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36332428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:38:44, skipping insertion in model container [2018-11-12 18:38:44,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:38:44" (3/3) ... [2018-11-12 18:38:44,470 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label24_true-unreach-call.c [2018-11-12 18:38:44,481 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 18:38:44,489 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 18:38:44,506 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 18:38:44,562 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 18:38:44,562 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 18:38:44,563 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 18:38:44,563 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 18:38:44,563 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 18:38:44,563 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 18:38:44,563 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 18:38:44,563 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 18:38:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-12 18:38:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-12 18:38:44,607 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:44,608 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:38:44,611 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:44,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:44,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1684659980, now seen corresponding path program 1 times [2018-11-12 18:38:44,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:44,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:44,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:44,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:44,673 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:38:45,175 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:38:45,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:38:45,176 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:38:45,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:38:45,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:38:45,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:38:45,202 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-12 18:38:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:48,342 INFO L93 Difference]: Finished difference Result 996 states and 1776 transitions. [2018-11-12 18:38:48,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:38:48,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2018-11-12 18:38:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:48,368 INFO L225 Difference]: With dead ends: 996 [2018-11-12 18:38:48,369 INFO L226 Difference]: Without dead ends: 697 [2018-11-12 18:38:48,380 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:38:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2018-11-12 18:38:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 481. [2018-11-12 18:38:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2018-11-12 18:38:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 742 transitions. [2018-11-12 18:38:48,479 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 742 transitions. Word has length 58 [2018-11-12 18:38:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:38:48,480 INFO L480 AbstractCegarLoop]: Abstraction has 481 states and 742 transitions. [2018-11-12 18:38:48,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:38:48,480 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 742 transitions. [2018-11-12 18:38:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-11-12 18:38:48,488 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:48,489 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:38:48,489 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:48,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:48,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1326176867, now seen corresponding path program 1 times [2018-11-12 18:38:48,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:48,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:48,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:48,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:48,492 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:48,832 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 18:38:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:38:48,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:38:48,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 18:38:48,981 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:38:48,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 18:38:48,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 18:38:48,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 18:38:48,984 INFO L87 Difference]: Start difference. First operand 481 states and 742 transitions. Second operand 6 states. [2018-11-12 18:38:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:53,393 INFO L93 Difference]: Finished difference Result 1725 states and 2777 transitions. [2018-11-12 18:38:53,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:38:53,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2018-11-12 18:38:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:53,411 INFO L225 Difference]: With dead ends: 1725 [2018-11-12 18:38:53,411 INFO L226 Difference]: Without dead ends: 1250 [2018-11-12 18:38:53,416 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 18:38:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2018-11-12 18:38:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1231. [2018-11-12 18:38:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2018-11-12 18:38:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1812 transitions. [2018-11-12 18:38:53,493 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1812 transitions. Word has length 131 [2018-11-12 18:38:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:38:53,494 INFO L480 AbstractCegarLoop]: Abstraction has 1231 states and 1812 transitions. [2018-11-12 18:38:53,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 18:38:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1812 transitions. [2018-11-12 18:38:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-12 18:38:53,499 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:53,500 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:38:53,500 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:53,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash -704139656, now seen corresponding path program 1 times [2018-11-12 18:38:53,501 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:53,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:53,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:53,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:53,502 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:38:53,965 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:38:53,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 18:38:53,965 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:38:53,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:38:53,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:38:53,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:38:53,967 INFO L87 Difference]: Start difference. First operand 1231 states and 1812 transitions. Second operand 7 states. [2018-11-12 18:38:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:58,895 INFO L93 Difference]: Finished difference Result 3652 states and 5569 transitions. [2018-11-12 18:38:58,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 18:38:58,907 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 132 [2018-11-12 18:38:58,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:58,930 INFO L225 Difference]: With dead ends: 3652 [2018-11-12 18:38:58,930 INFO L226 Difference]: Without dead ends: 2427 [2018-11-12 18:38:58,941 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-12 18:38:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2018-11-12 18:38:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2147. [2018-11-12 18:38:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2147 states. [2018-11-12 18:38:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 2934 transitions. [2018-11-12 18:38:59,046 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 2934 transitions. Word has length 132 [2018-11-12 18:38:59,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:38:59,046 INFO L480 AbstractCegarLoop]: Abstraction has 2147 states and 2934 transitions. [2018-11-12 18:38:59,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:38:59,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 2934 transitions. [2018-11-12 18:38:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-11-12 18:38:59,050 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:59,051 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:38:59,051 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:59,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:59,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1415755325, now seen corresponding path program 1 times [2018-11-12 18:38:59,052 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:59,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:59,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:59,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:59,053 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-12 18:38:59,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:38:59,535 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:38:59,536 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 176 with the following transitions: [2018-11-12 18:38:59,544 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [365], [367], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:38:59,621 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:38:59,621 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:39:00,390 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:39:00,920 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:39:00,922 INFO L272 AbstractInterpreter]: Visited 124 different actions 242 times. Merged at 5 different actions 5 times. Never widened. Performed 2975 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2975 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:39:00,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:00,963 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:39:01,630 INFO L227 lantSequenceWeakener]: Weakened 172 states. On average, predicates are now at 73.81% of their original sizes. [2018-11-12 18:39:01,630 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:39:02,604 INFO L415 sIntCurrentIteration]: We unified 174 AI predicates to 174 [2018-11-12 18:39:02,605 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:39:02,606 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:39:02,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2018-11-12 18:39:02,606 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:39:02,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:39:02,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:39:02,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:39:02,608 INFO L87 Difference]: Start difference. First operand 2147 states and 2934 transitions. Second operand 11 states. [2018-11-12 18:39:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:39:20,966 INFO L93 Difference]: Finished difference Result 4673 states and 6434 transitions. [2018-11-12 18:39:20,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 18:39:20,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 175 [2018-11-12 18:39:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:39:20,979 INFO L225 Difference]: With dead ends: 4673 [2018-11-12 18:39:20,979 INFO L226 Difference]: Without dead ends: 2532 [2018-11-12 18:39:20,988 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 183 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-12 18:39:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2018-11-12 18:39:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2528. [2018-11-12 18:39:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2528 states. [2018-11-12 18:39:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 3341 transitions. [2018-11-12 18:39:21,052 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 3341 transitions. Word has length 175 [2018-11-12 18:39:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:39:21,053 INFO L480 AbstractCegarLoop]: Abstraction has 2528 states and 3341 transitions. [2018-11-12 18:39:21,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:39:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 3341 transitions. [2018-11-12 18:39:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-11-12 18:39:21,057 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:39:21,057 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:39:21,058 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:39:21,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1882969289, now seen corresponding path program 1 times [2018-11-12 18:39:21,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:39:21,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:21,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:39:21,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:21,061 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:39:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:39:21,511 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-12 18:39:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-12 18:39:21,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:39:21,542 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:39:21,543 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 186 with the following transitions: [2018-11-12 18:39:21,543 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [365], [367], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:39:21,549 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:39:21,549 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:39:21,766 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:39:22,028 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:39:22,029 INFO L272 AbstractInterpreter]: Visited 134 different actions 389 times. Merged at 5 different actions 9 times. Never widened. Performed 6402 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6402 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:39:22,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:22,032 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:39:22,366 INFO L227 lantSequenceWeakener]: Weakened 182 states. On average, predicates are now at 73.77% of their original sizes. [2018-11-12 18:39:22,367 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:39:23,147 INFO L415 sIntCurrentIteration]: We unified 184 AI predicates to 184 [2018-11-12 18:39:23,148 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:39:23,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:39:23,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2018-11-12 18:39:23,148 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:39:23,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:39:23,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:39:23,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:39:23,150 INFO L87 Difference]: Start difference. First operand 2528 states and 3341 transitions. Second operand 11 states. [2018-11-12 18:39:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:39:38,603 INFO L93 Difference]: Finished difference Result 5064 states and 7022 transitions. [2018-11-12 18:39:38,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:39:38,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 185 [2018-11-12 18:39:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:39:38,617 INFO L225 Difference]: With dead ends: 5064 [2018-11-12 18:39:38,617 INFO L226 Difference]: Without dead ends: 2923 [2018-11-12 18:39:38,627 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 194 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:39:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2018-11-12 18:39:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2913. [2018-11-12 18:39:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2913 states. [2018-11-12 18:39:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 3788 transitions. [2018-11-12 18:39:38,699 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 3788 transitions. Word has length 185 [2018-11-12 18:39:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:39:38,700 INFO L480 AbstractCegarLoop]: Abstraction has 2913 states and 3788 transitions. [2018-11-12 18:39:38,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:39:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 3788 transitions. [2018-11-12 18:39:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-12 18:39:38,703 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:39:38,703 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:39:38,704 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:39:38,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash 158269423, now seen corresponding path program 1 times [2018-11-12 18:39:38,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:39:38,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:38,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:39:38,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:38,706 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:39:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:39:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:39:38,982 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:39:38,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:39:38,982 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:39:38,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:39:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:39:38,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:39:38,983 INFO L87 Difference]: Start difference. First operand 2913 states and 3788 transitions. Second operand 4 states. [2018-11-12 18:39:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:39:41,770 INFO L93 Difference]: Finished difference Result 7249 states and 9934 transitions. [2018-11-12 18:39:41,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:39:41,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 190 [2018-11-12 18:39:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:39:41,802 INFO L225 Difference]: With dead ends: 7249 [2018-11-12 18:39:41,802 INFO L226 Difference]: Without dead ends: 4722 [2018-11-12 18:39:41,815 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:39:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4722 states. [2018-11-12 18:39:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4722 to 4516. [2018-11-12 18:39:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4516 states. [2018-11-12 18:39:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 5970 transitions. [2018-11-12 18:39:41,919 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 5970 transitions. Word has length 190 [2018-11-12 18:39:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:39:41,920 INFO L480 AbstractCegarLoop]: Abstraction has 4516 states and 5970 transitions. [2018-11-12 18:39:41,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:39:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 5970 transitions. [2018-11-12 18:39:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-11-12 18:39:41,924 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:39:41,924 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:39:41,924 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:39:41,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:41,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1946138246, now seen corresponding path program 1 times [2018-11-12 18:39:41,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:39:41,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:41,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:39:41,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:41,927 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:39:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:39:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-12 18:39:42,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:39:42,164 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:39:42,164 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2018-11-12 18:39:42,164 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [365], [367], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:39:42,171 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:39:42,172 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:39:42,809 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:39:43,346 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:39:43,346 INFO L272 AbstractInterpreter]: Visited 155 different actions 452 times. Merged at 5 different actions 9 times. Never widened. Performed 8521 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8521 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:39:43,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:43,354 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:39:43,747 INFO L227 lantSequenceWeakener]: Weakened 140 states. On average, predicates are now at 74.41% of their original sizes. [2018-11-12 18:39:43,747 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:39:44,245 INFO L415 sIntCurrentIteration]: We unified 205 AI predicates to 205 [2018-11-12 18:39:44,246 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:39:44,246 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:39:44,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [5] total 22 [2018-11-12 18:39:44,246 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:39:44,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-12 18:39:44,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-12 18:39:44,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2018-11-12 18:39:44,247 INFO L87 Difference]: Start difference. First operand 4516 states and 5970 transitions. Second operand 19 states. [2018-11-12 18:40:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:11,585 INFO L93 Difference]: Finished difference Result 9954 states and 13722 transitions. [2018-11-12 18:40:11,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-12 18:40:11,586 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 206 [2018-11-12 18:40:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:11,609 INFO L225 Difference]: With dead ends: 9954 [2018-11-12 18:40:11,609 INFO L226 Difference]: Without dead ends: 5824 [2018-11-12 18:40:11,628 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 233 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=374, Invalid=1606, Unknown=0, NotChecked=0, Total=1980 [2018-11-12 18:40:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5824 states. [2018-11-12 18:40:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5824 to 5804. [2018-11-12 18:40:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5804 states. [2018-11-12 18:40:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5804 states to 5804 states and 7417 transitions. [2018-11-12 18:40:11,755 INFO L78 Accepts]: Start accepts. Automaton has 5804 states and 7417 transitions. Word has length 206 [2018-11-12 18:40:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:11,755 INFO L480 AbstractCegarLoop]: Abstraction has 5804 states and 7417 transitions. [2018-11-12 18:40:11,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-12 18:40:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states and 7417 transitions. [2018-11-12 18:40:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-11-12 18:40:11,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:11,764 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:40:11,765 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:11,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:11,765 INFO L82 PathProgramCache]: Analyzing trace with hash 701848699, now seen corresponding path program 1 times [2018-11-12 18:40:11,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:11,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:11,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:11,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:11,767 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-11-12 18:40:12,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:40:12,204 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:40:12,204 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 261 with the following transitions: [2018-11-12 18:40:12,205 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [365], [367], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [494], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:40:12,208 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:40:12,209 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:40:12,298 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:40:12,989 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:40:12,990 INFO L272 AbstractInterpreter]: Visited 141 different actions 550 times. Merged at 7 different actions 21 times. Never widened. Performed 8784 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8784 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:40:12,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:12,998 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:40:12,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:40:12,998 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:40:13,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:13,012 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:40:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:13,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:40:18,079 WARN L179 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2018-11-12 18:40:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-11-12 18:40:18,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:40:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:40:18,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:40:18,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2018-11-12 18:40:18,654 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:40:18,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 18:40:18,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 18:40:18,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=74, Unknown=2, NotChecked=0, Total=110 [2018-11-12 18:40:18,657 INFO L87 Difference]: Start difference. First operand 5804 states and 7417 transitions. Second operand 9 states. [2018-11-12 18:40:27,370 WARN L179 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 27 DAG size of output: 13 [2018-11-12 18:40:39,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:39,589 INFO L93 Difference]: Finished difference Result 17499 states and 24555 transitions. [2018-11-12 18:40:39,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-12 18:40:39,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 260 [2018-11-12 18:40:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:39,647 INFO L225 Difference]: With dead ends: 17499 [2018-11-12 18:40:39,648 INFO L226 Difference]: Without dead ends: 12087 [2018-11-12 18:40:39,682 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 515 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=171, Invalid=427, Unknown=2, NotChecked=0, Total=600 [2018-11-12 18:40:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12087 states. [2018-11-12 18:40:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12087 to 11782. [2018-11-12 18:40:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11782 states. [2018-11-12 18:40:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11782 states to 11782 states and 15713 transitions. [2018-11-12 18:40:39,989 INFO L78 Accepts]: Start accepts. Automaton has 11782 states and 15713 transitions. Word has length 260 [2018-11-12 18:40:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:39,989 INFO L480 AbstractCegarLoop]: Abstraction has 11782 states and 15713 transitions. [2018-11-12 18:40:39,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 18:40:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11782 states and 15713 transitions. [2018-11-12 18:40:39,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-11-12 18:40:40,000 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:40,000 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:40:40,001 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:40,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:40,001 INFO L82 PathProgramCache]: Analyzing trace with hash -893978701, now seen corresponding path program 1 times [2018-11-12 18:40:40,001 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:40,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:40,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:40,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:40,002 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:40,310 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-12 18:40:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 6 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:40:41,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:40:41,197 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:40:41,197 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 265 with the following transitions: [2018-11-12 18:40:41,197 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [365], [367], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:40:41,199 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:40:41,199 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:40:41,285 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:40:41,928 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:40:41,928 INFO L272 AbstractInterpreter]: Visited 140 different actions 407 times. Merged at 5 different actions 9 times. Never widened. Performed 6258 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6258 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:40:41,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:41,969 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:40:42,371 INFO L227 lantSequenceWeakener]: Weakened 261 states. On average, predicates are now at 73.64% of their original sizes. [2018-11-12 18:40:42,371 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:40:42,646 INFO L415 sIntCurrentIteration]: We unified 263 AI predicates to 263 [2018-11-12 18:40:42,647 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:40:42,647 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:40:42,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [17] total 28 [2018-11-12 18:40:42,647 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:42,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-12 18:40:42,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-12 18:40:42,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-12 18:40:42,648 INFO L87 Difference]: Start difference. First operand 11782 states and 15713 transitions. Second operand 13 states. [2018-11-12 18:41:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:00,914 INFO L93 Difference]: Finished difference Result 21139 states and 28804 transitions. [2018-11-12 18:41:00,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:41:00,914 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 264 [2018-11-12 18:41:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:00,960 INFO L225 Difference]: With dead ends: 21139 [2018-11-12 18:41:00,960 INFO L226 Difference]: Without dead ends: 11986 [2018-11-12 18:41:00,985 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 273 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-12 18:41:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2018-11-12 18:41:01,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 11982. [2018-11-12 18:41:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11982 states. [2018-11-12 18:41:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11982 states to 11982 states and 15923 transitions. [2018-11-12 18:41:01,222 INFO L78 Accepts]: Start accepts. Automaton has 11982 states and 15923 transitions. Word has length 264 [2018-11-12 18:41:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:01,223 INFO L480 AbstractCegarLoop]: Abstraction has 11982 states and 15923 transitions. [2018-11-12 18:41:01,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-12 18:41:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 11982 states and 15923 transitions. [2018-11-12 18:41:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-11-12 18:41:01,249 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:01,250 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:41:01,250 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:01,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:01,250 INFO L82 PathProgramCache]: Analyzing trace with hash 431611238, now seen corresponding path program 1 times [2018-11-12 18:41:01,250 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:01,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:01,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:01,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:01,252 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 315 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:41:02,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:02,234 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:41:02,234 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 335 with the following transitions: [2018-11-12 18:41:02,235 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [365], [367], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:41:02,237 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:41:02,237 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:41:02,359 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:41:02,718 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:41:02,718 INFO L272 AbstractInterpreter]: Visited 127 different actions 498 times. Merged at 8 different actions 26 times. Never widened. Performed 8228 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8228 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:41:02,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:02,728 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:41:02,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:02,728 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:41:02,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:02,738 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:41:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:02,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:41:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 302 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 18:41:03,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:41:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 302 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 18:41:03,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:41:03,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-12 18:41:03,497 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:41:03,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 18:41:03,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 18:41:03,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2018-11-12 18:41:03,499 INFO L87 Difference]: Start difference. First operand 11982 states and 15923 transitions. Second operand 18 states. [2018-11-12 18:41:12,531 WARN L179 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2018-11-12 18:41:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:18,043 INFO L93 Difference]: Finished difference Result 27191 states and 42485 transitions. [2018-11-12 18:41:18,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-12 18:41:18,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 334 [2018-11-12 18:41:18,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:18,128 INFO L225 Difference]: With dead ends: 27191 [2018-11-12 18:41:18,128 INFO L226 Difference]: Without dead ends: 17837 [2018-11-12 18:41:18,190 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 708 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1075, Invalid=4181, Unknown=0, NotChecked=0, Total=5256 [2018-11-12 18:41:18,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17837 states. [2018-11-12 18:41:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17837 to 17399. [2018-11-12 18:41:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17399 states. [2018-11-12 18:41:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17399 states to 17399 states and 22353 transitions. [2018-11-12 18:41:18,626 INFO L78 Accepts]: Start accepts. Automaton has 17399 states and 22353 transitions. Word has length 334 [2018-11-12 18:41:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:18,627 INFO L480 AbstractCegarLoop]: Abstraction has 17399 states and 22353 transitions. [2018-11-12 18:41:18,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 18:41:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 17399 states and 22353 transitions. [2018-11-12 18:41:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-11-12 18:41:18,655 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:18,656 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 18:41:18,656 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:18,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:18,656 INFO L82 PathProgramCache]: Analyzing trace with hash 569394853, now seen corresponding path program 1 times [2018-11-12 18:41:18,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:18,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:18,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:18,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:18,658 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:19,138 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-11-12 18:41:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 250 proven. 54 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 18:41:19,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:19,545 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:41:19,545 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 340 with the following transitions: [2018-11-12 18:41:19,546 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [365], [367], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [574], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:41:19,549 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:41:19,549 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:41:19,858 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:41:20,287 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:41:20,287 INFO L272 AbstractInterpreter]: Visited 127 different actions 499 times. Merged at 8 different actions 27 times. Never widened. Performed 6788 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6788 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:41:20,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:20,293 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:41:20,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:20,293 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:41:20,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:20,302 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:41:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:20,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:41:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 302 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 18:41:20,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:41:20,687 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-12 18:41:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 302 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 18:41:21,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:41:21,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-12 18:41:21,281 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:41:21,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 18:41:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 18:41:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-11-12 18:41:21,282 INFO L87 Difference]: Start difference. First operand 17399 states and 22353 transitions. Second operand 10 states. [2018-11-12 18:41:23,809 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 11 [2018-11-12 18:41:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:29,535 INFO L93 Difference]: Finished difference Result 37641 states and 51261 transitions. [2018-11-12 18:41:29,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-12 18:41:29,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 339 [2018-11-12 18:41:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:29,621 INFO L225 Difference]: With dead ends: 37641 [2018-11-12 18:41:29,622 INFO L226 Difference]: Without dead ends: 21978 [2018-11-12 18:41:29,693 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 701 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2018-11-12 18:41:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21978 states. [2018-11-12 18:41:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21978 to 21441. [2018-11-12 18:41:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21441 states. [2018-11-12 18:41:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21441 states to 21441 states and 27150 transitions. [2018-11-12 18:41:30,354 INFO L78 Accepts]: Start accepts. Automaton has 21441 states and 27150 transitions. Word has length 339 [2018-11-12 18:41:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:30,354 INFO L480 AbstractCegarLoop]: Abstraction has 21441 states and 27150 transitions. [2018-11-12 18:41:30,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 18:41:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 21441 states and 27150 transitions. [2018-11-12 18:41:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-11-12 18:41:30,392 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:30,392 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 18:41:30,392 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:30,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1517936202, now seen corresponding path program 1 times [2018-11-12 18:41:30,393 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:30,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:30,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:30,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:30,394 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 11 proven. 374 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-12 18:41:31,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:31,199 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:41:31,200 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 347 with the following transitions: [2018-11-12 18:41:31,200 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [365], [367], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:41:31,203 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:41:31,203 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:41:31,288 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:41:32,305 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:41:32,305 INFO L272 AbstractInterpreter]: Visited 137 different actions 674 times. Merged at 8 different actions 36 times. Never widened. Performed 10741 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10741 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:41:32,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:32,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:41:32,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:32,316 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:41:32,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:32,325 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:41:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:32,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:41:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 302 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:41:32,689 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:41:32,921 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-11-12 18:41:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 302 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:41:33,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:41:33,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 24 [2018-11-12 18:41:33,555 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:41:33,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 18:41:33,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 18:41:33,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2018-11-12 18:41:33,556 INFO L87 Difference]: Start difference. First operand 21441 states and 27150 transitions. Second operand 22 states. [2018-11-12 18:41:38,135 WARN L179 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2018-11-12 18:41:38,361 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2018-11-12 18:41:43,092 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-11-12 18:41:46,741 WARN L179 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2018-11-12 18:41:47,435 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2018-11-12 18:41:48,287 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-11-12 18:41:50,812 WARN L179 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2018-11-12 18:41:54,215 WARN L179 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2018-11-12 18:41:57,067 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-11-12 18:41:58,553 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-11-12 18:42:00,640 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2018-11-12 18:42:01,938 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 Received shutdown request... [2018-11-12 18:42:15,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-11-12 18:42:15,698 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 18:42:15,705 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 18:42:15,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 06:42:15 BoogieIcfgContainer [2018-11-12 18:42:15,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 18:42:15,706 INFO L168 Benchmark]: Toolchain (without parser) took 217225.34 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 3.9 GB in the end (delta: -2.5 GB). Peak memory consumption was 602.8 MB. Max. memory is 7.1 GB. [2018-11-12 18:42:15,707 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 18:42:15,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 916.28 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2018-11-12 18:42:15,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 165.79 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -850.7 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2018-11-12 18:42:15,710 INFO L168 Benchmark]: Boogie Preprocessor took 137.39 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 18:42:15,710 INFO L168 Benchmark]: RCFGBuilder took 4758.37 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 175.1 MB). Peak memory consumption was 175.1 MB. Max. memory is 7.1 GB. [2018-11-12 18:42:15,711 INFO L168 Benchmark]: TraceAbstraction took 211242.55 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.0 GB in the beginning and 3.9 GB in the end (delta: -1.9 GB). Peak memory consumption was 468.9 MB. Max. memory is 7.1 GB. [2018-11-12 18:42:15,715 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 916.28 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 165.79 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -850.7 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.39 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4758.37 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 175.1 MB). Peak memory consumption was 175.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211242.55 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.0 GB in the beginning and 3.9 GB in the end (delta: -1.9 GB). Peak memory consumption was 468.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 159]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 159). Cancelled while BasicCegarLoop was constructing difference of abstraction (21441states) and FLOYD_HOARE automaton (currently 177 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (59095 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 211.1s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 181.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2579 SDtfs, 38951 SDslu, 5284 SDs, 0 SdLazy, 47510 SolverSat, 11253 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 89.9s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 3996 GetRequests, 3537 SyntacticMatches, 12 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17894 ImplicationChecksByTransitivity, 36.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21441occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.0s AbstIntTime, 8 AbstIntIterations, 4 AbstIntStrong, 0.9977964722032517 AbsIntWeakeningRatio, 0.11501210653753027 AbsIntAvgWeakeningVarsNumRemoved, 22.771186440677965 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 2039 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 13.5s InterpolantComputationTime, 3899 NumberOfCodeBlocks, 3899 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 5158 ConstructedInterpolants, 10 QuantifiedInterpolants, 8918842 SizeOfPredicates, 9 NumberOfNonLiveVariables, 2236 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 3665/4493 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown