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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label40_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 23:55:57,667 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:55:57,671 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:55:57,691 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:55:57,692 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:55:57,694 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:55:57,696 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:55:57,698 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:55:57,700 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:55:57,707 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:55:57,708 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:55:57,708 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:55:57,712 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:55:57,715 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:55:57,717 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:55:57,718 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:55:57,719 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:55:57,723 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:55:57,726 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:55:57,728 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:55:57,729 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:55:57,732 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:55:57,738 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 23:55:57,752 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-26 23:55:57,774 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:55:57,775 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:55:57,776 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:55:57,777 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 23:55:57,777 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 23:55:57,777 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 23:55:57,777 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 23:55:57,777 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 23:55:57,778 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-26 23:55:57,778 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 23:55:57,779 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 23:55:57,779 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 23:55:57,780 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:55:57,780 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 23:55:57,781 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:55:57,781 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:55:57,781 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:55:57,781 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:55:57,781 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:55:57,782 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:55:57,782 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:55:57,782 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:55:57,782 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:55:57,782 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:55:57,783 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:55:57,783 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:55:57,783 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:55:57,783 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:55:57,783 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 23:55:57,784 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:55:57,785 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 23:55:57,785 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 23:55:57,786 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 23:55:57,786 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-26 23:55:57,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:55:57,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:55:57,891 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:55:57,893 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:55:57,893 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:55:57,894 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label40_false-unreach-call_false-termination.c [2018-10-26 23:55:57,965 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d56c9dd2e/7b3ca0cf46394963bf744e12be2dbe69/FLAG0577a0e71 [2018-10-26 23:55:58,588 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:55:58,589 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label40_false-unreach-call_false-termination.c [2018-10-26 23:55:58,606 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d56c9dd2e/7b3ca0cf46394963bf744e12be2dbe69/FLAG0577a0e71 [2018-10-26 23:55:58,627 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d56c9dd2e/7b3ca0cf46394963bf744e12be2dbe69 [2018-10-26 23:55:58,640 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:55:58,642 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 23:55:58,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:55:58,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:55:58,651 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:55:58,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:55:58" (1/1) ... [2018-10-26 23:55:58,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a192096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:58, skipping insertion in model container [2018-10-26 23:55:58,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:55:58" (1/1) ... [2018-10-26 23:55:58,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:55:58,756 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:55:59,260 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:55:59,265 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:55:59,459 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:55:59,479 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:55:59,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59 WrapperNode [2018-10-26 23:55:59,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:55:59,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 23:55:59,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 23:55:59,481 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 23:55:59,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (1/1) ... [2018-10-26 23:55:59,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (1/1) ... [2018-10-26 23:55:59,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 23:55:59,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:55:59,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:55:59,719 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:55:59,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (1/1) ... [2018-10-26 23:55:59,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (1/1) ... [2018-10-26 23:55:59,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (1/1) ... [2018-10-26 23:55:59,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (1/1) ... [2018-10-26 23:55:59,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (1/1) ... [2018-10-26 23:55:59,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (1/1) ... [2018-10-26 23:55:59,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (1/1) ... [2018-10-26 23:55:59,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:55:59,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:55:59,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:55:59,829 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:55:59,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (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 [2018-10-26 23:55:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:55:59,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:55:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-26 23:55:59,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-26 23:55:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:55:59,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:55:59,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:55:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:56:03,301 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:56:03,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:56:03 BoogieIcfgContainer [2018-10-26 23:56:03,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:56:03,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:56:03,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:56:03,307 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:56:03,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:55:58" (1/3) ... [2018-10-26 23:56:03,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f90887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:56:03, skipping insertion in model container [2018-10-26 23:56:03,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:55:59" (2/3) ... [2018-10-26 23:56:03,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f90887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:56:03, skipping insertion in model container [2018-10-26 23:56:03,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:56:03" (3/3) ... [2018-10-26 23:56:03,311 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label40_false-unreach-call_false-termination.c [2018-10-26 23:56:03,322 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:56:03,331 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:56:03,350 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:56:03,404 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:56:03,405 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:56:03,405 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:56:03,405 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:56:03,405 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:56:03,405 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:56:03,406 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:56:03,406 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:56:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-26 23:56:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 23:56:03,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:56:03,441 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] [2018-10-26 23:56:03,443 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:56:03,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:56:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash -35569548, now seen corresponding path program 1 times [2018-10-26 23:56:03,452 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:56:03,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:56:03,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:56:03,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:56:03,500 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:56:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:56:03,888 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-26 23:56:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:56:04,124 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:56:04,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 23:56:04,124 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:56:04,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 23:56:04,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 23:56:04,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 23:56:04,145 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-10-26 23:56:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:56:07,203 INFO L93 Difference]: Finished difference Result 878 states and 1595 transitions. [2018-10-26 23:56:07,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 23:56:07,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2018-10-26 23:56:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:56:07,231 INFO L225 Difference]: With dead ends: 878 [2018-10-26 23:56:07,232 INFO L226 Difference]: Without dead ends: 617 [2018-10-26 23:56:07,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 23:56:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2018-10-26 23:56:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2018-10-26 23:56:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2018-10-26 23:56:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1129 transitions. [2018-10-26 23:56:07,349 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1129 transitions. Word has length 26 [2018-10-26 23:56:07,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:56:07,350 INFO L481 AbstractCegarLoop]: Abstraction has 617 states and 1129 transitions. [2018-10-26 23:56:07,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 23:56:07,350 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1129 transitions. [2018-10-26 23:56:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-26 23:56:07,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:56:07,361 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:56:07,361 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:56:07,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:56:07,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1735670092, now seen corresponding path program 1 times [2018-10-26 23:56:07,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:56:07,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:56:07,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:56:07,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:56:07,364 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:56:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:56:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:56:07,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:56:07,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-26 23:56:07,862 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:56:07,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:56:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:56:07,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:56:07,865 INFO L87 Difference]: Start difference. First operand 617 states and 1129 transitions. Second operand 6 states. [2018-10-26 23:56:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:56:10,422 INFO L93 Difference]: Finished difference Result 1620 states and 3026 transitions. [2018-10-26 23:56:10,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:56:10,424 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2018-10-26 23:56:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:56:10,438 INFO L225 Difference]: With dead ends: 1620 [2018-10-26 23:56:10,439 INFO L226 Difference]: Without dead ends: 1009 [2018-10-26 23:56:10,443 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 [2018-10-26 23:56:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2018-10-26 23:56:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 997. [2018-10-26 23:56:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2018-10-26 23:56:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1718 transitions. [2018-10-26 23:56:10,522 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1718 transitions. Word has length 146 [2018-10-26 23:56:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:56:10,523 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1718 transitions. [2018-10-26 23:56:10,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:56:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1718 transitions. [2018-10-26 23:56:10,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-10-26 23:56:10,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:56:10,540 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-26 23:56:10,540 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:56:10,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:56:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash -70137397, now seen corresponding path program 1 times [2018-10-26 23:56:10,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:56:10,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:56:10,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:56:10,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:56:10,543 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:56:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:56:11,227 WARN L179 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-10-26 23:56:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 38 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 23:56:11,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:56:11,711 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:56:11,712 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 260 with the following transitions: [2018-10-26 23:56:11,714 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-26 23:56:11,790 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:56:11,791 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:56:14,561 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 23:56:18,081 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 23:56:18,083 INFO L272 AbstractInterpreter]: Visited 125 different actions 125 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-26 23:56:18,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:56:18,128 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 23:56:21,133 INFO L227 lantSequenceWeakener]: Weakened 251 states. On average, predicates are now at 77.5% of their original sizes. [2018-10-26 23:56:21,134 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 23:56:21,632 INFO L415 sIntCurrentIteration]: We unified 258 AI predicates to 258 [2018-10-26 23:56:21,633 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 23:56:21,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 23:56:21,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-10-26 23:56:21,636 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:56:21,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 23:56:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 23:56:21,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:56:21,640 INFO L87 Difference]: Start difference. First operand 997 states and 1718 transitions. Second operand 7 states. [2018-10-26 23:56:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:56:51,600 INFO L93 Difference]: Finished difference Result 2173 states and 3739 transitions. [2018-10-26 23:56:51,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:56:51,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 259 [2018-10-26 23:56:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:56:51,608 INFO L225 Difference]: With dead ends: 2173 [2018-10-26 23:56:51,609 INFO L226 Difference]: Without dead ends: 1182 [2018-10-26 23:56:51,613 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 259 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:56:51,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2018-10-26 23:56:51,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1180. [2018-10-26 23:56:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-10-26 23:56:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1908 transitions. [2018-10-26 23:56:51,655 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1908 transitions. Word has length 259 [2018-10-26 23:56:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:56:51,656 INFO L481 AbstractCegarLoop]: Abstraction has 1180 states and 1908 transitions. [2018-10-26 23:56:51,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 23:56:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1908 transitions. [2018-10-26 23:56:51,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-10-26 23:56:51,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:56:51,666 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-26 23:56:51,666 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:56:51,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:56:51,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1485361180, now seen corresponding path program 1 times [2018-10-26 23:56:51,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:56:51,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:56:51,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:56:51,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:56:51,669 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:56:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:56:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 145 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 23:56:52,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:56:52,607 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:56:52,607 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 345 with the following transitions: [2018-10-26 23:56:52,608 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-26 23:56:52,615 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:56:52,615 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:56:55,023 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 23:57:00,152 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 23:57:00,152 INFO L272 AbstractInterpreter]: Visited 130 different actions 252 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-26 23:57:00,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:57:00,162 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 23:57:00,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:57:00,162 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 [2018-10-26 23:57:00,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:57:00,182 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 23:57:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:57:00,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:57:00,683 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 23:57:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 267 proven. 53 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-26 23:57:01,164 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:57:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 67 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 23:57:02,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:57:02,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 20 [2018-10-26 23:57:02,304 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:57:02,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 23:57:02,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 23:57:02,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2018-10-26 23:57:02,306 INFO L87 Difference]: Start difference. First operand 1180 states and 1908 transitions. Second operand 15 states. [2018-10-26 23:57:03,125 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2018-10-26 23:57:03,613 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-10-26 23:57:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:57:09,089 INFO L93 Difference]: Finished difference Result 3005 states and 5050 transitions. [2018-10-26 23:57:09,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 23:57:09,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 344 [2018-10-26 23:57:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:57:09,109 INFO L225 Difference]: With dead ends: 3005 [2018-10-26 23:57:09,109 INFO L226 Difference]: Without dead ends: 1815 [2018-10-26 23:57:09,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 696 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 23:57:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2018-10-26 23:57:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1579. [2018-10-26 23:57:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2018-10-26 23:57:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2214 transitions. [2018-10-26 23:57:09,174 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2214 transitions. Word has length 344 [2018-10-26 23:57:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:57:09,175 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2214 transitions. [2018-10-26 23:57:09,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 23:57:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2214 transitions. [2018-10-26 23:57:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-10-26 23:57:09,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:57:09,186 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:57:09,186 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:57:09,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:57:09,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1777454544, now seen corresponding path program 1 times [2018-10-26 23:57:09,186 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:57:09,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:57:09,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:57:09,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:57:09,188 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:57:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:57:09,705 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 23:57:09,903 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 23:57:10,118 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 23:57:10,528 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-26 23:57:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 70 proven. 317 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 23:57:11,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:57:11,265 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:57:11,265 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 371 with the following transitions: [2018-10-26 23:57:11,266 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-26 23:57:11,274 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:57:11,274 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:57:13,555 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 23:57:21,754 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 23:57:21,755 INFO L272 AbstractInterpreter]: Visited 129 different actions 252 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-26 23:57:21,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:57:21,761 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 23:57:26,506 INFO L227 lantSequenceWeakener]: Weakened 238 states. On average, predicates are now at 77.62% of their original sizes. [2018-10-26 23:57:26,507 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 23:57:33,765 INFO L415 sIntCurrentIteration]: We unified 369 AI predicates to 369 [2018-10-26 23:57:33,766 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 23:57:33,766 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 23:57:33,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 30 [2018-10-26 23:57:33,767 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:57:33,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 23:57:33,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 23:57:33,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-10-26 23:57:33,768 INFO L87 Difference]: Start difference. First operand 1579 states and 2214 transitions. Second operand 17 states. Received shutdown request... [2018-10-26 23:59:55,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 23:59:55,168 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 23:59:55,174 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 23:59:55,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 11:59:55 BoogieIcfgContainer [2018-10-26 23:59:55,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 23:59:55,175 INFO L168 Benchmark]: Toolchain (without parser) took 236534.43 ms. Allocated memory was 1.5 GB in the beginning and 4.3 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-26 23:59:55,176 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 23:59:55,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 836.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-10-26 23:59:55,178 INFO L168 Benchmark]: Boogie Procedure Inliner took 237.51 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 740.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -826.6 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2018-10-26 23:59:55,179 INFO L168 Benchmark]: Boogie Preprocessor took 107.58 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2018-10-26 23:59:55,180 INFO L168 Benchmark]: RCFGBuilder took 3476.37 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 131.1 MB). Peak memory consumption was 131.1 MB. Max. memory is 7.1 GB. [2018-10-26 23:59:55,180 INFO L168 Benchmark]: TraceAbstraction took 231870.68 ms. Allocated memory was 2.3 GB in the beginning and 4.3 GB in the end (delta: 2.0 GB). Free memory was 2.1 GB in the beginning and 3.0 GB in the end (delta: -966.2 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-10-26 23:59:55,186 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 836.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 237.51 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 740.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -826.6 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.58 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3476.37 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 131.1 MB). Peak memory consumption was 131.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 231870.68 ms. Allocated memory was 2.3 GB in the beginning and 4.3 GB in the end (delta: 2.0 GB). Free memory was 2.1 GB in the beginning and 3.0 GB in the end (delta: -966.2 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 61). Cancelled while BasicCegarLoop was constructing difference of abstraction (1579states) and FLOYD_HOARE automaton (currently 19 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (1567 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 231.7s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 183.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 645 SDtfs, 6457 SDslu, 1041 SDs, 0 SdLazy, 7125 SolverSat, 1856 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 93.9s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 1384 GetRequests, 1307 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 13.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1579occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 24.4s AbstIntTime, 3 AbstIntIterations, 2 AbstIntStrong, 0.9961023276240666 AbsIntWeakeningRatio, 0.09250398724082935 AbsIntAvgWeakeningVarsNumRemoved, 400.8628389154705 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 250 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 1489 NumberOfCodeBlocks, 1489 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 1826 ConstructedInterpolants, 0 QuantifiedInterpolants, 6296541 SizeOfPredicates, 6 NumberOfNonLiveVariables, 564 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 646/1582 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown