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_label32_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 03:03:51,798 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 03:03:51,801 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 03:03:51,819 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 03:03:51,820 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 03:03:51,822 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 03:03:51,823 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 03:03:51,825 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 03:03:51,827 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 03:03:51,829 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 03:03:51,831 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 03:03:51,831 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 03:03:51,832 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 03:03:51,833 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 03:03:51,834 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 03:03:51,842 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 03:03:51,843 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 03:03:51,846 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 03:03:51,848 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 03:03:51,853 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 03:03:51,854 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 03:03:51,856 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 03:03:51,860 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 03:03:51,871 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 [2018-10-27 03:03:51,887 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 03:03:51,887 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 03:03:51,890 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 03:03:51,890 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 03:03:51,890 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 03:03:51,891 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 03:03:51,891 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 03:03:51,891 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 03:03:51,891 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 03:03:51,891 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 03:03:51,892 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 03:03:51,892 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 03:03:51,893 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 03:03:51,893 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 03:03:51,893 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 03:03:51,893 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 03:03:51,895 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 03:03:51,895 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 03:03:51,896 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 03:03:51,896 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 03:03:51,896 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 03:03:51,896 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 03:03:51,896 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 03:03:51,897 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 03:03:51,897 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 03:03:51,897 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 03:03:51,897 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 03:03:51,898 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 03:03:51,898 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 03:03:51,898 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 03:03:51,898 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 03:03:51,898 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 03:03:51,899 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 03:03:51,899 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 03:03:51,964 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 03:03:51,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 03:03:51,982 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 03:03:51,983 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 03:03:51,984 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 03:03:51,985 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label32_true-unreach-call_false-termination.c [2018-10-27 03:03:52,050 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2a0203d2b/08e5ae8640944f01bc5d241fc5dd7561/FLAG8e25be63f [2018-10-27 03:03:52,649 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 03:03:52,650 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label32_true-unreach-call_false-termination.c [2018-10-27 03:03:52,678 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2a0203d2b/08e5ae8640944f01bc5d241fc5dd7561/FLAG8e25be63f [2018-10-27 03:03:52,694 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2a0203d2b/08e5ae8640944f01bc5d241fc5dd7561 [2018-10-27 03:03:52,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 03:03:52,707 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 03:03:52,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 03:03:52,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 03:03:52,713 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 03:03:52,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:03:52" (1/1) ... [2018-10-27 03:03:52,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d519f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:52, skipping insertion in model container [2018-10-27 03:03:52,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:03:52" (1/1) ... [2018-10-27 03:03:52,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 03:03:52,820 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 03:03:53,395 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 03:03:53,400 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 03:03:53,580 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 03:03:53,598 INFO L193 MainTranslator]: Completed translation [2018-10-27 03:03:53,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53 WrapperNode [2018-10-27 03:03:53,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 03:03:53,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 03:03:53,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 03:03:53,600 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 03:03:53,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (1/1) ... [2018-10-27 03:03:53,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (1/1) ... [2018-10-27 03:03:53,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 03:03:53,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 03:03:53,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 03:03:53,852 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 03:03:53,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (1/1) ... [2018-10-27 03:03:53,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (1/1) ... [2018-10-27 03:03:53,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (1/1) ... [2018-10-27 03:03:53,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (1/1) ... [2018-10-27 03:03:53,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (1/1) ... [2018-10-27 03:03:53,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (1/1) ... [2018-10-27 03:03:53,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (1/1) ... [2018-10-27 03:03:53,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 03:03:53,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 03:03:53,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 03:03:53,967 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 03:03:53,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 03:03:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 03:03:54,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 03:03:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 03:03:54,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 03:03:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 03:03:54,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 03:03:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 03:03:54,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 03:03:57,689 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 03:03:57,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:03:57 BoogieIcfgContainer [2018-10-27 03:03:57,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 03:03:57,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 03:03:57,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 03:03:57,697 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 03:03:57,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:03:52" (1/3) ... [2018-10-27 03:03:57,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7060504b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:03:57, skipping insertion in model container [2018-10-27 03:03:57,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:03:53" (2/3) ... [2018-10-27 03:03:57,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7060504b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:03:57, skipping insertion in model container [2018-10-27 03:03:57,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:03:57" (3/3) ... [2018-10-27 03:03:57,701 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label32_true-unreach-call_false-termination.c [2018-10-27 03:03:57,711 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 03:03:57,720 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 03:03:57,737 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 03:03:57,778 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 03:03:57,779 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 03:03:57,779 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 03:03:57,779 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 03:03:57,779 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 03:03:57,779 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 03:03:57,779 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 03:03:57,780 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 03:03:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 03:03:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-27 03:03:57,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:03:57,820 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 03:03:57,823 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:03:57,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:03:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1019361724, now seen corresponding path program 1 times [2018-10-27 03:03:57,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:03:57,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:03:57,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:03:57,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:03:57,880 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:03:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:03:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:03:58,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 03:03:58,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 03:03:58,329 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 03:03:58,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 03:03:58,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 03:03:58,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 03:03:58,355 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-10-27 03:04:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 03:04:01,300 INFO L93 Difference]: Finished difference Result 894 states and 1611 transitions. [2018-10-27 03:04:01,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 03:04:01,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-10-27 03:04:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 03:04:01,341 INFO L225 Difference]: With dead ends: 894 [2018-10-27 03:04:01,342 INFO L226 Difference]: Without dead ends: 633 [2018-10-27 03:04:01,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 03:04:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-10-27 03:04:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2018-10-27 03:04:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2018-10-27 03:04:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 962 transitions. [2018-10-27 03:04:01,452 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 962 transitions. Word has length 62 [2018-10-27 03:04:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 03:04:01,453 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 962 transitions. [2018-10-27 03:04:01,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 03:04:01,454 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 962 transitions. [2018-10-27 03:04:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-27 03:04:01,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:04:01,469 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 03:04:01,470 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:04:01,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:04:01,470 INFO L82 PathProgramCache]: Analyzing trace with hash 585274651, now seen corresponding path program 1 times [2018-10-27 03:04:01,470 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:04:01,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:04:01,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:04:01,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:04:01,473 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:04:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:04:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:04:01,850 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 03:04:01,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 03:04:01,851 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 03:04:01,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 03:04:01,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 03:04:01,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 03:04:01,854 INFO L87 Difference]: Start difference. First operand 633 states and 962 transitions. Second operand 4 states. [2018-10-27 03:04:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 03:04:04,973 INFO L93 Difference]: Finished difference Result 2170 states and 3490 transitions. [2018-10-27 03:04:04,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 03:04:04,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2018-10-27 03:04:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 03:04:04,988 INFO L225 Difference]: With dead ends: 2170 [2018-10-27 03:04:04,988 INFO L226 Difference]: Without dead ends: 1543 [2018-10-27 03:04:04,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 03:04:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2018-10-27 03:04:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1543. [2018-10-27 03:04:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2018-10-27 03:04:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2271 transitions. [2018-10-27 03:04:05,081 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2271 transitions. Word has length 175 [2018-10-27 03:04:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 03:04:05,082 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2271 transitions. [2018-10-27 03:04:05,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 03:04:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2271 transitions. [2018-10-27 03:04:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-27 03:04:05,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:04:05,099 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 03:04:05,099 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:04:05,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:04:05,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2093465648, now seen corresponding path program 1 times [2018-10-27 03:04:05,100 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:04:05,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:04:05,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:04:05,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:04:05,101 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:04:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:04:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 132 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:04:05,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:04:05,558 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 03:04:05,559 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 251 with the following transitions: [2018-10-27 03:04:05,561 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 03:04:05,633 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 03:04:05,634 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 03:04:08,350 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 03:04:11,182 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 03:04:11,184 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 03:04:11,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:04:11,245 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 03:04:14,078 INFO L227 lantSequenceWeakener]: Weakened 242 states. On average, predicates are now at 78.18% of their original sizes. [2018-10-27 03:04:14,078 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 03:04:14,593 INFO L415 sIntCurrentIteration]: We unified 249 AI predicates to 249 [2018-10-27 03:04:14,593 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 03:04:14,594 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 03:04:14,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2018-10-27 03:04:14,597 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 03:04:14,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 03:04:14,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 03:04:14,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 03:04:14,602 INFO L87 Difference]: Start difference. First operand 1543 states and 2271 transitions. Second operand 7 states. [2018-10-27 03:04:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 03:04:41,125 INFO L93 Difference]: Finished difference Result 3265 states and 4776 transitions. [2018-10-27 03:04:41,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 03:04:41,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2018-10-27 03:04:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 03:04:41,134 INFO L225 Difference]: With dead ends: 3265 [2018-10-27 03:04:41,134 INFO L226 Difference]: Without dead ends: 1728 [2018-10-27 03:04:41,139 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 250 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-27 03:04:41,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2018-10-27 03:04:41,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1726. [2018-10-27 03:04:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-10-27 03:04:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2461 transitions. [2018-10-27 03:04:41,193 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2461 transitions. Word has length 250 [2018-10-27 03:04:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 03:04:41,194 INFO L481 AbstractCegarLoop]: Abstraction has 1726 states and 2461 transitions. [2018-10-27 03:04:41,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 03:04:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2461 transitions. [2018-10-27 03:04:41,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2018-10-27 03:04:41,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:04:41,206 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 03:04:41,206 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:04:41,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:04:41,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2144924513, now seen corresponding path program 1 times [2018-10-27 03:04:41,207 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:04:41,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:04:41,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:04:41,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:04:41,210 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:04:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:04:41,748 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 03:04:41,968 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-27 03:04:42,196 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 03:04:42,445 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-27 03:04:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 253 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 03:04:42,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:04:42,961 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 03:04:42,961 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 336 with the following transitions: [2018-10-27 03:04:42,962 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 03:04:42,967 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 03:04:42,968 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 03:04:45,064 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 03:04:49,745 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 03:04:49,745 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 03:04:49,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:04:49,757 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 03:04:52,641 INFO L227 lantSequenceWeakener]: Weakened 118 states. On average, predicates are now at 78.04% of their original sizes. [2018-10-27 03:04:52,641 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 03:05:13,591 INFO L415 sIntCurrentIteration]: We unified 334 AI predicates to 334 [2018-10-27 03:05:13,592 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 03:05:13,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 03:05:13,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [12] total 28 [2018-10-27 03:05:13,593 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 03:05:13,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-27 03:05:13,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-27 03:05:13,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2018-10-27 03:05:13,594 INFO L87 Difference]: Start difference. First operand 1726 states and 2461 transitions. Second operand 18 states. [2018-10-27 03:07:42,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 03:07:42,163 INFO L93 Difference]: Finished difference Result 4013 states and 5642 transitions. [2018-10-27 03:07:42,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-27 03:07:42,164 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 335 [2018-10-27 03:07:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 03:07:42,176 INFO L225 Difference]: With dead ends: 4013 [2018-10-27 03:07:42,176 INFO L226 Difference]: Without dead ends: 2476 [2018-10-27 03:07:42,181 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 340 GetRequests, 298 SyntacticMatches, 20 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2018-10-27 03:07:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2018-10-27 03:07:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2259. [2018-10-27 03:07:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2259 states. [2018-10-27 03:07:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3019 transitions. [2018-10-27 03:07:42,331 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3019 transitions. Word has length 335 [2018-10-27 03:07:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 03:07:42,332 INFO L481 AbstractCegarLoop]: Abstraction has 2259 states and 3019 transitions. [2018-10-27 03:07:42,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-27 03:07:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3019 transitions. [2018-10-27 03:07:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-10-27 03:07:42,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:07:42,343 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 03:07:42,343 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:07:42,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:07:42,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1746465803, now seen corresponding path program 1 times [2018-10-27 03:07:42,344 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:07:42,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:07:42,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:07:42,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:07:42,345 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:07:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:07:42,832 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 03:07:43,014 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-27 03:07:43,242 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 03:07:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 178 proven. 243 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 03:07:44,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:07:44,055 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 03:07:44,055 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 362 with the following transitions: [2018-10-27 03:07:44,056 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [397], [399], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 03:07:44,061 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 03:07:44,062 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 03:07:46,882 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-10-27 03:07:53,678 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-27 03:07:53,679 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-27 03:07:53,680 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 03:07:53,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:07:53,680 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 03:07:53,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:07:53,691 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 03:07:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:07:53,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 03:07:53,886 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-27 03:07:54,087 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 03:07:54,088 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 03:07:54,092 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 03:07:54,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 03:07:54 BoogieIcfgContainer [2018-10-27 03:07:54,092 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 03:07:54,093 INFO L168 Benchmark]: Toolchain (without parser) took 241387.53 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-27 03:07:54,094 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 03:07:54,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 891.08 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-10-27 03:07:54,096 INFO L168 Benchmark]: Boogie Procedure Inliner took 251.74 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -826.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2018-10-27 03:07:54,097 INFO L168 Benchmark]: Boogie Preprocessor took 115.21 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: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2018-10-27 03:07:54,098 INFO L168 Benchmark]: RCFGBuilder took 3723.23 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: 118.9 MB). Peak memory consumption was 118.9 MB. Max. memory is 7.1 GB. [2018-10-27 03:07:54,098 INFO L168 Benchmark]: TraceAbstraction took 236401.02 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.9 GB in the end (delta: -880.9 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-10-27 03:07:54,104 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 891.08 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 251.74 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -826.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.21 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: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3723.23 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: 118.9 MB). Peak memory consumption was 118.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236401.02 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.9 GB in the end (delta: -880.9 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: 169]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 169). Cancelled while BasicCegarLoop was analyzing trace of length 362 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 15 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 236.3s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 181.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 798 SDtfs, 4347 SDslu, 638 SDs, 0 SdLazy, 5673 SolverSat, 913 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.6s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 601 GetRequests, 549 SyntacticMatches, 20 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 22.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2259occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 22.1s AbstIntTime, 3 AbstIntIterations, 2 AbstIntStrong, 0.995808163671166 AbsIntWeakeningRatio, 0.09948542024013722 AbsIntAvgWeakeningVarsNumRemoved, 584.0840480274443 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 4 MinimizatonAttempts, 219 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 822 NumberOfCodeBlocks, 822 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 818 ConstructedInterpolants, 0 QuantifiedInterpolants, 2035572 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 445/640 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown