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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 14:41:08,606 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 14:41:08,608 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 14:41:08,626 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 14:41:08,626 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 14:41:08,627 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 14:41:08,629 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 14:41:08,630 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 14:41:08,632 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 14:41:08,633 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 14:41:08,633 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 14:41:08,634 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 14:41:08,635 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 14:41:08,636 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 14:41:08,637 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 14:41:08,638 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 14:41:08,639 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 14:41:08,640 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 14:41:08,642 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 14:41:08,644 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 14:41:08,645 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 14:41:08,646 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 14:41:08,649 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 14:41:08,649 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 14:41:08,649 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 14:41:08,650 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 14:41:08,651 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 14:41:08,652 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 14:41:08,653 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 14:41:08,654 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 14:41:08,654 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 14:41:08,655 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 14:41:08,655 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 14:41:08,655 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 14:41:08,656 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 14:41:08,657 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 14:41:08,657 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.epf [2018-11-07 14:41:08,673 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 14:41:08,673 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 14:41:08,674 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 14:41:08,674 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 14:41:08,674 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 14:41:08,675 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 14:41:08,675 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 14:41:08,675 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 14:41:08,675 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 14:41:08,675 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 14:41:08,676 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 14:41:08,676 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 14:41:08,676 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 14:41:08,677 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 14:41:08,677 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 14:41:08,677 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 14:41:08,677 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 14:41:08,677 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 14:41:08,678 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 14:41:08,678 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 14:41:08,678 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 14:41:08,678 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 14:41:08,678 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 14:41:08,679 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 14:41:08,679 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 14:41:08,679 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 14:41:08,679 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 14:41:08,679 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 14:41:08,680 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 14:41:08,680 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 14:41:08,680 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 14:41:08,680 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 14:41:08,680 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 14:41:08,680 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 14:41:08,724 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 14:41:08,744 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 14:41:08,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 14:41:08,748 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 14:41:08,748 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 14:41:08,749 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c [2018-11-07 14:41:08,808 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f78546fc/d8b75c6052e6498cb40d4ffadd87a047/FLAG704383c8c [2018-11-07 14:41:09,519 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 14:41:09,521 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c [2018-11-07 14:41:09,549 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f78546fc/d8b75c6052e6498cb40d4ffadd87a047/FLAG704383c8c [2018-11-07 14:41:09,565 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f78546fc/d8b75c6052e6498cb40d4ffadd87a047 [2018-11-07 14:41:09,577 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 14:41:09,579 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 14:41:09,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 14:41:09,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 14:41:09,587 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 14:41:09,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:41:09" (1/1) ... [2018-11-07 14:41:09,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b9d6296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:09, skipping insertion in model container [2018-11-07 14:41:09,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:41:09" (1/1) ... [2018-11-07 14:41:09,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 14:41:09,761 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 14:41:11,044 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 14:41:11,049 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 14:41:11,680 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 14:41:11,716 INFO L193 MainTranslator]: Completed translation [2018-11-07 14:41:11,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11 WrapperNode [2018-11-07 14:41:11,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 14:41:11,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 14:41:11,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 14:41:11,718 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 14:41:11,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (1/1) ... [2018-11-07 14:41:12,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (1/1) ... [2018-11-07 14:41:12,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 14:41:12,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 14:41:12,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 14:41:12,073 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 14:41:12,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (1/1) ... [2018-11-07 14:41:12,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (1/1) ... [2018-11-07 14:41:12,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (1/1) ... [2018-11-07 14:41:12,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (1/1) ... [2018-11-07 14:41:12,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (1/1) ... [2018-11-07 14:41:12,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (1/1) ... [2018-11-07 14:41:12,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (1/1) ... [2018-11-07 14:41:12,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 14:41:12,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 14:41:12,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 14:41:12,331 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 14:41:12,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 14:41:12,406 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 14:41:12,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 14:41:12,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 14:41:12,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-07 14:41:12,407 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-07 14:41:12,408 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 14:41:12,408 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 14:41:12,408 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 14:41:12,408 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 14:41:12,408 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 14:41:12,409 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 14:41:12,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 14:41:12,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 14:41:12,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 14:41:12,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 14:41:21,482 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 14:41:21,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:41:21 BoogieIcfgContainer [2018-11-07 14:41:21,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 14:41:21,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 14:41:21,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 14:41:21,488 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 14:41:21,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:41:09" (1/3) ... [2018-11-07 14:41:21,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cca389f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:41:21, skipping insertion in model container [2018-11-07 14:41:21,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:41:11" (2/3) ... [2018-11-07 14:41:21,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cca389f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:41:21, skipping insertion in model container [2018-11-07 14:41:21,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:41:21" (3/3) ... [2018-11-07 14:41:21,491 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label24_true-unreach-call.c [2018-11-07 14:41:21,500 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 14:41:21,509 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 14:41:21,525 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 14:41:21,571 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 14:41:21,571 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 14:41:21,571 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 14:41:21,572 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 14:41:21,572 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 14:41:21,572 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 14:41:21,572 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 14:41:21,572 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 14:41:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-11-07 14:41:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-07 14:41:21,627 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:41:21,629 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] [2018-11-07 14:41:21,631 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:41:21,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:41:21,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1344002707, now seen corresponding path program 1 times [2018-11-07 14:41:21,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:41:21,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:21,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:41:21,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:21,691 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:41:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:41:22,217 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 14:41:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:41:22,449 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:41:22,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 14:41:22,449 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:41:22,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 14:41:22,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 14:41:22,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 14:41:22,476 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-11-07 14:41:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:41:29,929 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-11-07 14:41:29,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 14:41:29,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2018-11-07 14:41:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:41:29,969 INFO L225 Difference]: With dead ends: 2446 [2018-11-07 14:41:29,969 INFO L226 Difference]: Without dead ends: 1604 [2018-11-07 14:41:29,980 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 14:41:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-11-07 14:41:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-11-07 14:41:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-11-07 14:41:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2969 transitions. [2018-11-07 14:41:30,180 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2969 transitions. Word has length 53 [2018-11-07 14:41:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:41:30,181 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 2969 transitions. [2018-11-07 14:41:30,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 14:41:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2969 transitions. [2018-11-07 14:41:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-07 14:41:30,195 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:41:30,196 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] [2018-11-07 14:41:30,196 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:41:30,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:41:30,196 INFO L82 PathProgramCache]: Analyzing trace with hash -450811892, now seen corresponding path program 1 times [2018-11-07 14:41:30,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:41:30,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:30,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:41:30,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:30,199 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:41:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:41:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:41:30,461 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:41:30,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 14:41:30,461 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:41:30,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 14:41:30,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 14:41:30,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 14:41:30,464 INFO L87 Difference]: Start difference. First operand 1604 states and 2969 transitions. Second operand 5 states. [2018-11-07 14:41:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:41:39,744 INFO L93 Difference]: Finished difference Result 4038 states and 7427 transitions. [2018-11-07 14:41:39,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 14:41:39,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2018-11-07 14:41:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:41:39,764 INFO L225 Difference]: With dead ends: 4038 [2018-11-07 14:41:39,764 INFO L226 Difference]: Without dead ends: 2440 [2018-11-07 14:41:39,769 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 14:41:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2018-11-07 14:41:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2413. [2018-11-07 14:41:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2413 states. [2018-11-07 14:41:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 4141 transitions. [2018-11-07 14:41:39,838 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 4141 transitions. Word has length 127 [2018-11-07 14:41:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:41:39,839 INFO L480 AbstractCegarLoop]: Abstraction has 2413 states and 4141 transitions. [2018-11-07 14:41:39,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 14:41:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 4141 transitions. [2018-11-07 14:41:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-07 14:41:39,843 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:41:39,843 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] [2018-11-07 14:41:39,844 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:41:39,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:41:39,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1515805392, now seen corresponding path program 1 times [2018-11-07 14:41:39,844 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:41:39,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:39,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:41:39,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:39,846 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:41:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:41:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:41:40,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 14:41:40,106 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 14:41:40,107 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 130 with the following transitions: [2018-11-07 14:41:40,109 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] [2018-11-07 14:41:40,153 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 14:41:40,153 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 14:41:40,834 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 14:41:40,836 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. [2018-11-07 14:41:40,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:41:40,888 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 14:41:40,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 14:41:40,888 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 14:41:40,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:41:40,904 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 14:41:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:41:41,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 14:41:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:41:41,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 14:41:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:41:41,623 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 14:41:41,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2018-11-07 14:41:41,624 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:41:41,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 14:41:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 14:41:41,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 14:41:41,628 INFO L87 Difference]: Start difference. First operand 2413 states and 4141 transitions. Second operand 3 states. [2018-11-07 14:41:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:41:48,670 INFO L93 Difference]: Finished difference Result 7156 states and 12477 transitions. [2018-11-07 14:41:48,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 14:41:48,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2018-11-07 14:41:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:41:48,701 INFO L225 Difference]: With dead ends: 7156 [2018-11-07 14:41:48,701 INFO L226 Difference]: Without dead ends: 4749 [2018-11-07 14:41:48,712 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 14:41:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2018-11-07 14:41:48,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 4749. [2018-11-07 14:41:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4749 states. [2018-11-07 14:41:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 7195 transitions. [2018-11-07 14:41:48,852 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 7195 transitions. Word has length 129 [2018-11-07 14:41:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:41:48,853 INFO L480 AbstractCegarLoop]: Abstraction has 4749 states and 7195 transitions. [2018-11-07 14:41:48,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 14:41:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 7195 transitions. [2018-11-07 14:41:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-07 14:41:48,857 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:41:48,857 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] [2018-11-07 14:41:48,857 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:41:48,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:41:48,858 INFO L82 PathProgramCache]: Analyzing trace with hash 56708252, now seen corresponding path program 1 times [2018-11-07 14:41:48,858 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:41:48,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:48,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:41:48,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:48,859 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:41:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:41:49,095 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 14:41:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:41:49,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:41:49,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 14:41:49,501 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:41:49,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 14:41:49,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 14:41:49,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 14:41:49,502 INFO L87 Difference]: Start difference. First operand 4749 states and 7195 transitions. Second operand 6 states. [2018-11-07 14:41:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:41:59,180 INFO L93 Difference]: Finished difference Result 17482 states and 27226 transitions. [2018-11-07 14:41:59,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 14:41:59,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2018-11-07 14:41:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:41:59,259 INFO L225 Difference]: With dead ends: 17482 [2018-11-07 14:41:59,260 INFO L226 Difference]: Without dead ends: 12739 [2018-11-07 14:41:59,291 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 14:41:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12739 states. [2018-11-07 14:41:59,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12739 to 12652. [2018-11-07 14:41:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12652 states. [2018-11-07 14:41:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12652 states to 12652 states and 18756 transitions. [2018-11-07 14:41:59,657 INFO L78 Accepts]: Start accepts. Automaton has 12652 states and 18756 transitions. Word has length 135 [2018-11-07 14:41:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:41:59,657 INFO L480 AbstractCegarLoop]: Abstraction has 12652 states and 18756 transitions. [2018-11-07 14:41:59,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 14:41:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 12652 states and 18756 transitions. [2018-11-07 14:41:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-11-07 14:41:59,670 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:41:59,670 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] [2018-11-07 14:41:59,671 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:41:59,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:41:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2138160203, now seen corresponding path program 1 times [2018-11-07 14:41:59,673 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:41:59,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:59,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:41:59,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:41:59,674 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:41:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:41:59,960 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 14:42:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:42:00,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:42:00,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 14:42:00,017 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:42:00,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 14:42:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 14:42:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 14:42:00,019 INFO L87 Difference]: Start difference. First operand 12652 states and 18756 transitions. Second operand 6 states. [2018-11-07 14:42:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:42:06,450 INFO L93 Difference]: Finished difference Result 28666 states and 43319 transitions. [2018-11-07 14:42:06,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 14:42:06,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2018-11-07 14:42:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:42:06,528 INFO L225 Difference]: With dead ends: 28666 [2018-11-07 14:42:06,528 INFO L226 Difference]: Without dead ends: 16020 [2018-11-07 14:42:06,574 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 14:42:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16020 states. [2018-11-07 14:42:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16020 to 15974. [2018-11-07 14:42:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15974 states. [2018-11-07 14:42:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15974 states to 15974 states and 22998 transitions. [2018-11-07 14:42:06,962 INFO L78 Accepts]: Start accepts. Automaton has 15974 states and 22998 transitions. Word has length 156 [2018-11-07 14:42:06,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:42:06,963 INFO L480 AbstractCegarLoop]: Abstraction has 15974 states and 22998 transitions. [2018-11-07 14:42:06,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 14:42:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 15974 states and 22998 transitions. [2018-11-07 14:42:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-07 14:42:06,972 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:42:06,973 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] [2018-11-07 14:42:06,973 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:42:06,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:42:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash 802704968, now seen corresponding path program 1 times [2018-11-07 14:42:06,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:42:06,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:42:06,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:42:06,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:42:06,975 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:42:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:42:07,295 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 14:42:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:42:07,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:42:07,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 14:42:07,671 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:42:07,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 14:42:07,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 14:42:07,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 14:42:07,673 INFO L87 Difference]: Start difference. First operand 15974 states and 22998 transitions. Second operand 6 states. [2018-11-07 14:42:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:42:16,006 INFO L93 Difference]: Finished difference Result 33966 states and 49476 transitions. [2018-11-07 14:42:16,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 14:42:16,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2018-11-07 14:42:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:42:16,068 INFO L225 Difference]: With dead ends: 33966 [2018-11-07 14:42:16,068 INFO L226 Difference]: Without dead ends: 17998 [2018-11-07 14:42:16,107 INFO L604 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 [2018-11-07 14:42:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17998 states. [2018-11-07 14:42:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17998 to 17845. [2018-11-07 14:42:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17845 states. [2018-11-07 14:42:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17845 states to 17845 states and 24000 transitions. [2018-11-07 14:42:16,486 INFO L78 Accepts]: Start accepts. Automaton has 17845 states and 24000 transitions. Word has length 173 [2018-11-07 14:42:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:42:16,487 INFO L480 AbstractCegarLoop]: Abstraction has 17845 states and 24000 transitions. [2018-11-07 14:42:16,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 14:42:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 17845 states and 24000 transitions. [2018-11-07 14:42:16,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-11-07 14:42:16,499 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:42:16,499 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] [2018-11-07 14:42:16,499 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:42:16,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:42:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash -349036039, now seen corresponding path program 1 times [2018-11-07 14:42:16,501 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:42:16,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:42:16,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:42:16,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:42:16,502 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:42:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:42:16,781 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 14:42:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 14:42:17,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 14:42:17,454 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 14:42:17,454 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: [2018-11-07 14:42:17,455 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] [2018-11-07 14:42:17,462 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 14:42:17,462 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 14:42:17,811 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 14:42:17,811 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. [2018-11-07 14:42:17,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:42:17,847 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 14:42:17,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 14:42:17,848 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 14:42:17,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:42:17,867 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 14:42:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:42:17,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 14:42:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 14:42:18,554 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 14:42:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 14:42:19,226 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 14:42:19,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 14 [2018-11-07 14:42:19,227 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:42:19,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 14:42:19,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 14:42:19,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-11-07 14:42:19,228 INFO L87 Difference]: Start difference. First operand 17845 states and 24000 transitions. Second operand 5 states. [2018-11-07 14:42:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:42:26,216 INFO L93 Difference]: Finished difference Result 53559 states and 74825 transitions. [2018-11-07 14:42:26,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 14:42:26,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2018-11-07 14:42:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:42:26,352 INFO L225 Difference]: With dead ends: 53559 [2018-11-07 14:42:26,352 INFO L226 Difference]: Without dead ends: 35720 [2018-11-07 14:42:26,395 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 416 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-07 14:42:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35720 states. [2018-11-07 14:42:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35720 to 35512. [2018-11-07 14:42:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35512 states. [2018-11-07 14:42:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35512 states to 35512 states and 45928 transitions. [2018-11-07 14:42:27,054 INFO L78 Accepts]: Start accepts. Automaton has 35512 states and 45928 transitions. Word has length 211 [2018-11-07 14:42:27,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:42:27,055 INFO L480 AbstractCegarLoop]: Abstraction has 35512 states and 45928 transitions. [2018-11-07 14:42:27,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 14:42:27,055 INFO L276 IsEmpty]: Start isEmpty. Operand 35512 states and 45928 transitions. [2018-11-07 14:42:27,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-11-07 14:42:27,068 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:42:27,068 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] [2018-11-07 14:42:27,068 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:42:27,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:42:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1582239141, now seen corresponding path program 1 times [2018-11-07 14:42:27,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:42:27,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:42:27,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:42:27,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:42:27,070 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:42:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:42:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 92 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 14:42:27,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 14:42:27,604 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 14:42:27,604 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 250 with the following transitions: [2018-11-07 14:42:27,605 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] [2018-11-07 14:42:27,611 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 14:42:27,612 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 14:42:27,794 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 14:42:27,794 INFO L272 AbstractInterpreter]: Visited 127 different actions 127 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 14:42:27,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:42:27,831 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 14:42:28,360 INFO L227 lantSequenceWeakener]: Weakened 240 states. On average, predicates are now at 75.53% of their original sizes. [2018-11-07 14:42:28,360 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 14:42:28,838 INFO L415 sIntCurrentIteration]: We unified 248 AI predicates to 248 [2018-11-07 14:42:28,839 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 14:42:28,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 14:42:28,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2018-11-07 14:42:28,840 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:42:28,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 14:42:28,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 14:42:28,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 14:42:28,841 INFO L87 Difference]: Start difference. First operand 35512 states and 45928 transitions. Second operand 8 states. [2018-11-07 14:42:35,742 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown