java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 07:45:24,535 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 07:45:24,537 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 07:45:24,550 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 07:45:24,550 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 07:45:24,551 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 07:45:24,552 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 07:45:24,554 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 07:45:24,556 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 07:45:24,557 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 07:45:24,558 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 07:45:24,558 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 07:45:24,559 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 07:45:24,560 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 07:45:24,561 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 07:45:24,562 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 07:45:24,563 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 07:45:24,565 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 07:45:24,567 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 07:45:24,569 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 07:45:24,570 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 07:45:24,571 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 07:45:24,574 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 07:45:24,574 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 07:45:24,574 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 07:45:24,575 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 07:45:24,576 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 07:45:24,577 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 07:45:24,578 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 07:45:24,579 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 07:45:24,579 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 07:45:24,580 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 07:45:24,580 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 07:45:24,581 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 07:45:24,582 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 07:45:24,582 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 07:45:24,583 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 07:45:24,602 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 07:45:24,602 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 07:45:24,603 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 07:45:24,603 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 07:45:24,603 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 07:45:24,604 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 07:45:24,606 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 07:45:24,606 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 07:45:24,606 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 07:45:24,606 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 07:45:24,607 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 07:45:24,607 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 07:45:24,607 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 07:45:24,607 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 07:45:24,608 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 07:45:24,609 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 07:45:24,609 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 07:45:24,609 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 07:45:24,609 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 07:45:24,609 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 07:45:24,610 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 07:45:24,610 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 07:45:24,610 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 07:45:24,610 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 07:45:24,610 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 07:45:24,610 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 07:45:24,612 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 07:45:24,612 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 07:45:24,612 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 07:45:24,613 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 07:45:24,613 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 07:45:24,613 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 07:45:24,613 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 07:45:24,613 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 07:45:24,614 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 07:45:24,614 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 07:45:24,670 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 07:45:24,682 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 07:45:24,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 07:45:24,689 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 07:45:24,690 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 07:45:24,690 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c [2018-10-27 07:45:24,762 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d551a5b60/d8a3f964d8e746f68b7d9000b5e8f44c/FLAG45bea5a8b [2018-10-27 07:45:25,544 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 07:45:25,545 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c [2018-10-27 07:45:25,594 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d551a5b60/d8a3f964d8e746f68b7d9000b5e8f44c/FLAG45bea5a8b [2018-10-27 07:45:25,617 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d551a5b60/d8a3f964d8e746f68b7d9000b5e8f44c [2018-10-27 07:45:25,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 07:45:25,634 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 07:45:25,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 07:45:25,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 07:45:25,644 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 07:45:25,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:45:25" (1/1) ... [2018-10-27 07:45:25,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc5d6a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:25, skipping insertion in model container [2018-10-27 07:45:25,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:45:25" (1/1) ... [2018-10-27 07:45:25,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 07:45:25,825 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 07:45:27,048 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 07:45:27,053 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 07:45:27,639 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 07:45:27,675 INFO L193 MainTranslator]: Completed translation [2018-10-27 07:45:27,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27 WrapperNode [2018-10-27 07:45:27,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 07:45:27,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 07:45:27,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 07:45:27,678 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 07:45:27,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (1/1) ... [2018-10-27 07:45:27,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (1/1) ... [2018-10-27 07:45:28,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 07:45:28,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 07:45:28,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 07:45:28,179 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 07:45:28,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (1/1) ... [2018-10-27 07:45:28,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (1/1) ... [2018-10-27 07:45:28,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (1/1) ... [2018-10-27 07:45:28,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (1/1) ... [2018-10-27 07:45:28,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (1/1) ... [2018-10-27 07:45:28,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (1/1) ... [2018-10-27 07:45:28,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (1/1) ... [2018-10-27 07:45:28,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 07:45:28,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 07:45:28,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 07:45:28,482 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 07:45:28,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 07:45:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 07:45:28,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 07:45:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 07:45:28,563 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 07:45:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 07:45:28,563 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 07:45:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 07:45:28,563 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 07:45:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 07:45:28,564 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 07:45:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 07:45:28,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 07:45:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 07:45:28,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 07:45:40,829 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 07:45:40,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:45:40 BoogieIcfgContainer [2018-10-27 07:45:40,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 07:45:40,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 07:45:40,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 07:45:40,835 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 07:45:40,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:45:25" (1/3) ... [2018-10-27 07:45:40,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b55b56c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:45:40, skipping insertion in model container [2018-10-27 07:45:40,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:27" (2/3) ... [2018-10-27 07:45:40,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b55b56c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:45:40, skipping insertion in model container [2018-10-27 07:45:40,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:45:40" (3/3) ... [2018-10-27 07:45:40,838 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label24_true-unreach-call.c [2018-10-27 07:45:40,848 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 07:45:40,864 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 07:45:40,883 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 07:45:40,945 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 07:45:40,945 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 07:45:40,946 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 07:45:40,946 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 07:45:40,946 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 07:45:40,946 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 07:45:40,946 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 07:45:40,947 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 07:45:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-27 07:45:40,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-27 07:45:40,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:45:40,999 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] [2018-10-27 07:45:41,002 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:45:41,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:45:41,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1344002707, now seen corresponding path program 1 times [2018-10-27 07:45:41,015 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:45:41,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:45:41,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:45:41,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:45:41,070 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:45:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:45:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:45:41,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 07:45:41,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 07:45:41,613 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:45:41,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 07:45:41,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 07:45:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 07:45:41,645 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-10-27 07:45:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:45:51,043 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-10-27 07:45:51,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 07:45:51,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2018-10-27 07:45:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:45:51,092 INFO L225 Difference]: With dead ends: 2446 [2018-10-27 07:45:51,092 INFO L226 Difference]: Without dead ends: 1604 [2018-10-27 07:45:51,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 07:45:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-10-27 07:45:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-10-27 07:45:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-10-27 07:45:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2969 transitions. [2018-10-27 07:45:51,267 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2969 transitions. Word has length 53 [2018-10-27 07:45:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:45:51,268 INFO L481 AbstractCegarLoop]: Abstraction has 1604 states and 2969 transitions. [2018-10-27 07:45:51,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 07:45:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2969 transitions. [2018-10-27 07:45:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-27 07:45:51,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:45:51,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 07:45:51,277 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:45:51,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:45:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash -450811892, now seen corresponding path program 1 times [2018-10-27 07:45:51,277 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:45:51,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:45:51,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:45:51,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:45:51,279 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:45:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:45:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:45:51,608 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 07:45:51,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 07:45:51,609 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:45:51,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 07:45:51,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 07:45:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 07:45:51,612 INFO L87 Difference]: Start difference. First operand 1604 states and 2969 transitions. Second operand 5 states. [2018-10-27 07:46:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:46:04,535 INFO L93 Difference]: Finished difference Result 4038 states and 7427 transitions. [2018-10-27 07:46:04,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 07:46:04,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2018-10-27 07:46:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:46:04,554 INFO L225 Difference]: With dead ends: 4038 [2018-10-27 07:46:04,554 INFO L226 Difference]: Without dead ends: 2440 [2018-10-27 07:46:04,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 07:46:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2018-10-27 07:46:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2413. [2018-10-27 07:46:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2413 states. [2018-10-27 07:46:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 4141 transitions. [2018-10-27 07:46:04,646 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 4141 transitions. Word has length 127 [2018-10-27 07:46:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:46:04,646 INFO L481 AbstractCegarLoop]: Abstraction has 2413 states and 4141 transitions. [2018-10-27 07:46:04,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 07:46:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 4141 transitions. [2018-10-27 07:46:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-27 07:46:04,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:46:04,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 07:46:04,651 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:46:04,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:46:04,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1515805392, now seen corresponding path program 1 times [2018-10-27 07:46:04,652 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:46:04,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:46:04,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:46:04,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:46:04,654 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:46:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:46:04,891 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 07:46:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:46:04,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:46:04,965 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 07:46:04,966 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 130 with the following transitions: [2018-10-27 07:46:04,968 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2191], [2193], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2384], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-27 07:46:05,029 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 07:46:05,030 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 07:46:05,595 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 07:46:05,597 INFO L272 AbstractInterpreter]: Visited 84 different actions 160 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 07:46:05,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:46:05,629 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 07:46:05,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:46:05,629 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 07:46:05,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:46:05,641 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 07:46:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:46:05,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 07:46:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:46:05,888 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 07:46:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:46:06,241 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 07:46:06,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2018-10-27 07:46:06,241 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:46:06,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 07:46:06,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 07:46:06,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-27 07:46:06,246 INFO L87 Difference]: Start difference. First operand 2413 states and 4141 transitions. Second operand 3 states. [2018-10-27 07:46:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:46:12,835 INFO L93 Difference]: Finished difference Result 7156 states and 12477 transitions. [2018-10-27 07:46:12,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 07:46:12,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2018-10-27 07:46:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:46:12,867 INFO L225 Difference]: With dead ends: 7156 [2018-10-27 07:46:12,867 INFO L226 Difference]: Without dead ends: 4749 [2018-10-27 07:46:12,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-27 07:46:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2018-10-27 07:46:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 4749. [2018-10-27 07:46:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4749 states. [2018-10-27 07:46:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 7195 transitions. [2018-10-27 07:46:13,023 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 7195 transitions. Word has length 129 [2018-10-27 07:46:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:46:13,025 INFO L481 AbstractCegarLoop]: Abstraction has 4749 states and 7195 transitions. [2018-10-27 07:46:13,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 07:46:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 7195 transitions. [2018-10-27 07:46:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-27 07:46:13,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:46:13,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 07:46:13,030 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:46:13,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:46:13,030 INFO L82 PathProgramCache]: Analyzing trace with hash 56708252, now seen corresponding path program 1 times [2018-10-27 07:46:13,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:46:13,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:46:13,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:46:13,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:46:13,032 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:46:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:46:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:46:13,286 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 07:46:13,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 07:46:13,286 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:46:13,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 07:46:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 07:46:13,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 07:46:13,288 INFO L87 Difference]: Start difference. First operand 4749 states and 7195 transitions. Second operand 6 states. [2018-10-27 07:46:23,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:46:23,657 INFO L93 Difference]: Finished difference Result 17482 states and 27226 transitions. [2018-10-27 07:46:23,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 07:46:23,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2018-10-27 07:46:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:46:23,748 INFO L225 Difference]: With dead ends: 17482 [2018-10-27 07:46:23,749 INFO L226 Difference]: Without dead ends: 12739 [2018-10-27 07:46:23,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 07:46:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12739 states. [2018-10-27 07:46:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12739 to 12652. [2018-10-27 07:46:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12652 states. [2018-10-27 07:46:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12652 states to 12652 states and 18756 transitions. [2018-10-27 07:46:24,165 INFO L78 Accepts]: Start accepts. Automaton has 12652 states and 18756 transitions. Word has length 135 [2018-10-27 07:46:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:46:24,165 INFO L481 AbstractCegarLoop]: Abstraction has 12652 states and 18756 transitions. [2018-10-27 07:46:24,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 07:46:24,166 INFO L276 IsEmpty]: Start isEmpty. Operand 12652 states and 18756 transitions. [2018-10-27 07:46:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-27 07:46:24,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:46:24,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 07:46:24,173 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:46:24,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:46:24,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2138160203, now seen corresponding path program 1 times [2018-10-27 07:46:24,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:46:24,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:46:24,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:46:24,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:46:24,177 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:46:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:46:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:46:24,457 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 07:46:24,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 07:46:24,457 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:46:24,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 07:46:24,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 07:46:24,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 07:46:24,459 INFO L87 Difference]: Start difference. First operand 12652 states and 18756 transitions. Second operand 6 states. [2018-10-27 07:46:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:46:31,072 INFO L93 Difference]: Finished difference Result 28666 states and 43319 transitions. [2018-10-27 07:46:31,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 07:46:31,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2018-10-27 07:46:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:46:31,145 INFO L225 Difference]: With dead ends: 28666 [2018-10-27 07:46:31,145 INFO L226 Difference]: Without dead ends: 16020 [2018-10-27 07:46:31,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 07:46:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16020 states. [2018-10-27 07:46:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16020 to 15974. [2018-10-27 07:46:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15974 states. [2018-10-27 07:46:31,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15974 states to 15974 states and 22998 transitions. [2018-10-27 07:46:31,587 INFO L78 Accepts]: Start accepts. Automaton has 15974 states and 22998 transitions. Word has length 156 [2018-10-27 07:46:31,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:46:31,588 INFO L481 AbstractCegarLoop]: Abstraction has 15974 states and 22998 transitions. [2018-10-27 07:46:31,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 07:46:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 15974 states and 22998 transitions. [2018-10-27 07:46:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-27 07:46:31,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:46:31,597 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 07:46:31,597 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:46:31,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:46:31,598 INFO L82 PathProgramCache]: Analyzing trace with hash 802704968, now seen corresponding path program 1 times [2018-10-27 07:46:31,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:46:31,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:46:31,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:46:31,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:46:31,600 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:46:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:46:31,877 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 07:46:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 07:46:32,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 07:46:32,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 07:46:32,275 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:46:32,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 07:46:32,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 07:46:32,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 07:46:32,276 INFO L87 Difference]: Start difference. First operand 15974 states and 22998 transitions. Second operand 6 states. [2018-10-27 07:46:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:46:45,743 INFO L93 Difference]: Finished difference Result 33966 states and 49476 transitions. [2018-10-27 07:46:45,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 07:46:45,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2018-10-27 07:46:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:46:45,815 INFO L225 Difference]: With dead ends: 33966 [2018-10-27 07:46:45,815 INFO L226 Difference]: Without dead ends: 17998 [2018-10-27 07:46:45,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 07:46:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17998 states. [2018-10-27 07:46:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17998 to 17845. [2018-10-27 07:46:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17845 states. [2018-10-27 07:46:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17845 states to 17845 states and 24000 transitions. [2018-10-27 07:46:46,331 INFO L78 Accepts]: Start accepts. Automaton has 17845 states and 24000 transitions. Word has length 173 [2018-10-27 07:46:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:46:46,332 INFO L481 AbstractCegarLoop]: Abstraction has 17845 states and 24000 transitions. [2018-10-27 07:46:46,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 07:46:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 17845 states and 24000 transitions. [2018-10-27 07:46:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-27 07:46:46,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:46:46,346 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, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 07:46:46,346 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:46:46,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:46:46,346 INFO L82 PathProgramCache]: Analyzing trace with hash -349036039, now seen corresponding path program 1 times [2018-10-27 07:46:46,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:46:46,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:46:46,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:46:46,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:46:46,348 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:46:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:46:46,652 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 07:46:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-27 07:46:47,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:46:47,445 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 07:46:47,445 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: [2018-10-27 07:46:47,445 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2191], [2193], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2384], [2385], [2389], [2393], [2397], [2401], [2405], [2408], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-27 07:46:47,451 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 07:46:47,451 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 07:46:51,696 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 07:46:51,696 INFO L272 AbstractInterpreter]: Visited 91 different actions 174 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 07:46:51,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:46:51,698 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 07:46:51,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:46:51,699 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 07:46:51,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:46:51,707 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 07:46:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:46:51,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 07:46:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-27 07:46:52,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 07:46:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-27 07:46:52,665 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 07:46:52,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 14 [2018-10-27 07:46:52,666 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:46:52,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 07:46:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 07:46:52,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-10-27 07:46:52,668 INFO L87 Difference]: Start difference. First operand 17845 states and 24000 transitions. Second operand 5 states. [2018-10-27 07:47:01,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 07:47:01,565 INFO L93 Difference]: Finished difference Result 53559 states and 74825 transitions. [2018-10-27 07:47:01,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 07:47:01,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2018-10-27 07:47:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 07:47:01,683 INFO L225 Difference]: With dead ends: 53559 [2018-10-27 07:47:01,683 INFO L226 Difference]: Without dead ends: 35720 [2018-10-27 07:47:01,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 416 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-10-27 07:47:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35720 states. [2018-10-27 07:47:02,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35720 to 35512. [2018-10-27 07:47:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35512 states. [2018-10-27 07:47:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35512 states to 35512 states and 45928 transitions. [2018-10-27 07:47:02,438 INFO L78 Accepts]: Start accepts. Automaton has 35512 states and 45928 transitions. Word has length 211 [2018-10-27 07:47:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 07:47:02,440 INFO L481 AbstractCegarLoop]: Abstraction has 35512 states and 45928 transitions. [2018-10-27 07:47:02,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 07:47:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 35512 states and 45928 transitions. [2018-10-27 07:47:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-27 07:47:02,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 07:47:02,454 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 07:47:02,455 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 07:47:02,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:47:02,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1582239141, now seen corresponding path program 1 times [2018-10-27 07:47:02,455 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 07:47:02,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:47:02,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 07:47:02,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 07:47:02,456 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 07:47:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 07:47:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 92 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 07:47:03,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 07:47:03,056 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 07:47:03,057 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 250 with the following transitions: [2018-10-27 07:47:03,058 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2191], [2193], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2376], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2568], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-27 07:47:03,068 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 07:47:03,070 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 07:47:03,477 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 07:47:03,478 INFO L272 AbstractInterpreter]: Visited 127 different actions 127 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-27 07:47:03,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 07:47:03,514 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 07:47:04,097 INFO L227 lantSequenceWeakener]: Weakened 240 states. On average, predicates are now at 75.57% of their original sizes. [2018-10-27 07:47:04,097 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 07:47:04,350 INFO L415 sIntCurrentIteration]: We unified 248 AI predicates to 248 [2018-10-27 07:47:04,351 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 07:47:04,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 07:47:04,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2018-10-27 07:47:04,352 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 07:47:04,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 07:47:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 07:47:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 07:47:04,353 INFO L87 Difference]: Start difference. First operand 35512 states and 45928 transitions. Second operand 6 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown