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_label52_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 22:29:21,725 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 22:29:21,728 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 22:29:21,751 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 22:29:21,751 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 22:29:21,753 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 22:29:21,754 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 22:29:21,758 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 22:29:21,760 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 22:29:21,768 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 22:29:21,769 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 22:29:21,769 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 22:29:21,773 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 22:29:21,774 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 22:29:21,777 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 22:29:21,778 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 22:29:21,781 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 22:29:21,784 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 22:29:21,789 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 22:29:21,791 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 22:29:21,794 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 22:29:21,797 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 22:29:21,801 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 22:29:21,815 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 [2018-10-23 22:29:21,845 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 22:29:21,846 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 22:29:21,847 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 22:29:21,847 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 22:29:21,847 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 22:29:21,847 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 22:29:21,847 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 22:29:21,848 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 22:29:21,848 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 22:29:21,849 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 22:29:21,849 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 22:29:21,849 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 22:29:21,850 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 22:29:21,850 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 22:29:21,850 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 22:29:21,850 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 22:29:21,850 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 22:29:21,852 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 22:29:21,852 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 22:29:21,853 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 22:29:21,853 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 22:29:21,853 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 22:29:21,853 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 22:29:21,854 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 22:29:21,854 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 22:29:21,855 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 22:29:21,855 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 22:29:21,855 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 22:29:21,855 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 22:29:21,856 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 22:29:21,856 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 22:29:21,856 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 22:29:21,856 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 22:29:21,857 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 22:29:21,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 22:29:21,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 22:29:21,927 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 22:29:21,928 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 22:29:21,929 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 22:29:21,929 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label52_false-unreach-call_false-termination.c [2018-10-23 22:29:21,999 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7549b872b/6696b99e20bd41479bd5a1e4febbf4e4/FLAG4be056a28 [2018-10-23 22:29:22,654 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 22:29:22,657 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label52_false-unreach-call_false-termination.c [2018-10-23 22:29:22,677 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7549b872b/6696b99e20bd41479bd5a1e4febbf4e4/FLAG4be056a28 [2018-10-23 22:29:22,696 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7549b872b/6696b99e20bd41479bd5a1e4febbf4e4 [2018-10-23 22:29:22,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 22:29:22,709 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 22:29:22,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 22:29:22,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 22:29:22,714 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 22:29:22,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:29:22" (1/1) ... [2018-10-23 22:29:22,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ad0ab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:22, skipping insertion in model container [2018-10-23 22:29:22,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:29:22" (1/1) ... [2018-10-23 22:29:22,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 22:29:22,794 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 22:29:23,249 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:29:23,255 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 22:29:23,426 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:29:23,449 INFO L193 MainTranslator]: Completed translation [2018-10-23 22:29:23,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23 WrapperNode [2018-10-23 22:29:23,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 22:29:23,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 22:29:23,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 22:29:23,451 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 22:29:23,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (1/1) ... [2018-10-23 22:29:23,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (1/1) ... [2018-10-23 22:29:23,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 22:29:23,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 22:29:23,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 22:29:23,729 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 22:29:23,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (1/1) ... [2018-10-23 22:29:23,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (1/1) ... [2018-10-23 22:29:23,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (1/1) ... [2018-10-23 22:29:23,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (1/1) ... [2018-10-23 22:29:23,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (1/1) ... [2018-10-23 22:29:23,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (1/1) ... [2018-10-23 22:29:23,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (1/1) ... [2018-10-23 22:29:23,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 22:29:23,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 22:29:23,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 22:29:23,862 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 22:29:23,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (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 [2018-10-23 22:29:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 22:29:23,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 22:29:23,920 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-23 22:29:23,920 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-23 22:29:23,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 22:29:23,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 22:29:23,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 22:29:23,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 22:29:27,706 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 22:29:27,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:29:27 BoogieIcfgContainer [2018-10-23 22:29:27,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 22:29:27,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 22:29:27,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 22:29:27,716 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 22:29:27,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:29:22" (1/3) ... [2018-10-23 22:29:27,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6935051f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:29:27, skipping insertion in model container [2018-10-23 22:29:27,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:29:23" (2/3) ... [2018-10-23 22:29:27,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6935051f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:29:27, skipping insertion in model container [2018-10-23 22:29:27,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:29:27" (3/3) ... [2018-10-23 22:29:27,722 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label52_false-unreach-call_false-termination.c [2018-10-23 22:29:27,733 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 22:29:27,744 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 22:29:27,769 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 22:29:27,820 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 22:29:27,820 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 22:29:27,820 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 22:29:27,820 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 22:29:27,820 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 22:29:27,821 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 22:29:27,821 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 22:29:27,821 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 22:29:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-23 22:29:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-23 22:29:27,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:29:27,858 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] [2018-10-23 22:29:27,861 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:29:27,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:29:27,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1208637865, now seen corresponding path program 1 times [2018-10-23 22:29:27,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:29:27,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:29:27,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:29:27,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:29:27,915 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:29:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:29:28,240 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:29:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:29:28,354 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:29:28,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 22:29:28,355 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:29:28,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 22:29:28,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 22:29:28,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 22:29:28,382 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-23 22:29:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:29:30,309 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-10-23 22:29:30,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 22:29:30,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-10-23 22:29:30,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:29:30,334 INFO L225 Difference]: With dead ends: 691 [2018-10-23 22:29:30,335 INFO L226 Difference]: Without dead ends: 434 [2018-10-23 22:29:30,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 22:29:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-23 22:29:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-10-23 22:29:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-23 22:29:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-10-23 22:29:30,422 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 29 [2018-10-23 22:29:30,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:29:30,422 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-10-23 22:29:30,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 22:29:30,422 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-10-23 22:29:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-23 22:29:30,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:29:30,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:29:30,431 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:29:30,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:29:30,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1035560415, now seen corresponding path program 1 times [2018-10-23 22:29:30,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:29:30,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:29:30,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:29:30,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:29:30,434 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:29:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:29:30,759 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:29:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:29:30,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:29:30,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 22:29:30,818 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:29:30,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:29:30,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:29:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:29:30,821 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-10-23 22:29:32,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:29:32,915 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-10-23 22:29:32,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:29:32,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2018-10-23 22:29:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:29:32,922 INFO L225 Difference]: With dead ends: 1062 [2018-10-23 22:29:32,923 INFO L226 Difference]: Without dead ends: 634 [2018-10-23 22:29:32,925 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 [2018-10-23 22:29:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-10-23 22:29:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-10-23 22:29:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-10-23 22:29:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-10-23 22:29:32,966 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 116 [2018-10-23 22:29:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:29:32,967 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-10-23 22:29:32,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:29:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-10-23 22:29:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-23 22:29:32,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:29:32,971 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:29:32,971 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:29:32,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:29:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2098713064, now seen corresponding path program 1 times [2018-10-23 22:29:32,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:29:32,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:29:32,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:29:32,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:29:32,974 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:29:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:29:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:29:33,157 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:29:33,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:29:33,157 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:29:33,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:29:33,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:29:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:29:33,158 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-10-23 22:29:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:29:37,366 INFO L93 Difference]: Finished difference Result 2352 states and 4016 transitions. [2018-10-23 22:29:37,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:29:37,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2018-10-23 22:29:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:29:37,380 INFO L225 Difference]: With dead ends: 2352 [2018-10-23 22:29:37,380 INFO L226 Difference]: Without dead ends: 1733 [2018-10-23 22:29:37,386 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 [2018-10-23 22:29:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2018-10-23 22:29:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1733. [2018-10-23 22:29:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-10-23 22:29:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2647 transitions. [2018-10-23 22:29:37,447 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2647 transitions. Word has length 125 [2018-10-23 22:29:37,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:29:37,448 INFO L481 AbstractCegarLoop]: Abstraction has 1733 states and 2647 transitions. [2018-10-23 22:29:37,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:29:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2647 transitions. [2018-10-23 22:29:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-23 22:29:37,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:29:37,464 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 22:29:37,464 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:29:37,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:29:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash -839398590, now seen corresponding path program 1 times [2018-10-23 22:29:37,465 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:29:37,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:29:37,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:29:37,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:29:37,471 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:29:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:29:37,986 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-10-23 22:29:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 44 proven. 107 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-23 22:29:38,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:29:38,278 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:29:38,280 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 255 with the following transitions: [2018-10-23 22:29:38,282 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [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], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-23 22:29:38,354 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:29:38,354 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:29:41,449 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:29:42,900 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 22:29:42,902 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-23 22:29:42,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:29:42,946 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 22:29:45,897 INFO L232 lantSequenceWeakener]: Weakened 246 states. On average, predicates are now at 77.56% of their original sizes. [2018-10-23 22:29:45,897 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 22:29:46,350 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 22:29:46,351 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:29:46,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-10-23 22:29:46,352 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:29:46,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 22:29:46,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 22:29:46,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-23 22:29:46,353 INFO L87 Difference]: Start difference. First operand 1733 states and 2647 transitions. Second operand 7 states. [2018-10-23 22:30:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:30:00,950 INFO L93 Difference]: Finished difference Result 3645 states and 5568 transitions. [2018-10-23 22:30:00,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:30:00,950 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 254 [2018-10-23 22:30:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:30:00,962 INFO L225 Difference]: With dead ends: 3645 [2018-10-23 22:30:00,962 INFO L226 Difference]: Without dead ends: 1918 [2018-10-23 22:30:00,971 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-23 22:30:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2018-10-23 22:30:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2018-10-23 22:30:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-10-23 22:30:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2838 transitions. [2018-10-23 22:30:01,028 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2838 transitions. Word has length 254 [2018-10-23 22:30:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:30:01,029 INFO L481 AbstractCegarLoop]: Abstraction has 1916 states and 2838 transitions. [2018-10-23 22:30:01,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 22:30:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2838 transitions. [2018-10-23 22:30:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-23 22:30:01,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:30:01,040 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:30:01,041 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:30:01,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:30:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1746897264, now seen corresponding path program 1 times [2018-10-23 22:30:01,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:30:01,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:30:01,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:30:01,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:30:01,043 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:30:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:30:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 154 proven. 189 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-23 22:30:01,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:30:01,948 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:30:01,949 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 340 with the following transitions: [2018-10-23 22:30:01,949 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [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], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-23 22:30:01,955 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:30:01,956 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:30:04,624 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:30:07,951 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 22:30:07,951 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. [2018-10-23 22:30:07,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:30:07,959 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 22:30:10,904 INFO L232 lantSequenceWeakener]: Weakened 125 states. On average, predicates are now at 78.16% of their original sizes. [2018-10-23 22:30:10,904 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 22:31:00,763 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 22:31:00,763 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:31:00,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [12] total 33 [2018-10-23 22:31:00,763 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:31:00,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-23 22:31:00,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-23 22:31:00,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2018-10-23 22:31:00,765 INFO L87 Difference]: Start difference. First operand 1916 states and 2838 transitions. Second operand 23 states. [2018-10-23 22:33:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:33:07,709 INFO L93 Difference]: Finished difference Result 4206 states and 6181 transitions. [2018-10-23 22:33:07,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 22:33:07,709 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 339 [2018-10-23 22:33:07,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:33:07,721 INFO L225 Difference]: With dead ends: 4206 [2018-10-23 22:33:07,721 INFO L226 Difference]: Without dead ends: 1921 [2018-10-23 22:33:07,732 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 352 GetRequests, 257 SyntacticMatches, 60 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 22:33:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2018-10-23 22:33:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1916. [2018-10-23 22:33:07,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-10-23 22:33:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2832 transitions. [2018-10-23 22:33:07,823 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2832 transitions. Word has length 339 [2018-10-23 22:33:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:33:07,824 INFO L481 AbstractCegarLoop]: Abstraction has 1916 states and 2832 transitions. [2018-10-23 22:33:07,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-23 22:33:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2832 transitions. [2018-10-23 22:33:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-10-23 22:33:07,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:33:07,834 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:33:07,834 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:33:07,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:33:07,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1127648740, now seen corresponding path program 1 times [2018-10-23 22:33:07,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:33:07,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:33:07,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:33:07,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:33:07,836 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:33:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:33:08,323 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 22:33:08,519 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 22:33:08,744 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 22:33:09,127 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-23 22:33:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 316 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-23 22:33:09,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:33:09,815 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:33:09,815 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 366 with the following transitions: [2018-10-23 22:33:09,816 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [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], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-23 22:33:09,820 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:33:09,820 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:33:11,548 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:33:16,199 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 22:33:16,199 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-23 22:33:16,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:33:16,209 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 22:33:19,581 INFO L232 lantSequenceWeakener]: Weakened 363 states. On average, predicates are now at 77.53% of their original sizes. [2018-10-23 22:33:19,582 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 22:33:20,016 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 22:33:20,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:33:20,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2018-10-23 22:33:20,017 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:33:20,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 22:33:20,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 22:33:20,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-10-23 22:33:20,019 INFO L87 Difference]: Start difference. First operand 1916 states and 2832 transitions. Second operand 12 states. Received shutdown request... [2018-10-23 22:33:27,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 22:33:27,057 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 22:33:27,063 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 22:33:27,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:33:27 BoogieIcfgContainer [2018-10-23 22:33:27,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 22:33:27,064 INFO L168 Benchmark]: Toolchain (without parser) took 244356.26 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 2.8 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-23 22:33:27,065 INFO L168 Benchmark]: CDTParser took 0.19 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. [2018-10-23 22:33:27,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 740.31 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. [2018-10-23 22:33:27,067 INFO L168 Benchmark]: Boogie Procedure Inliner took 277.76 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -830.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2018-10-23 22:33:27,068 INFO L168 Benchmark]: Boogie Preprocessor took 132.26 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: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2018-10-23 22:33:27,069 INFO L168 Benchmark]: RCFGBuilder took 3845.82 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: 121.5 MB). Peak memory consumption was 121.5 MB. Max. memory is 7.1 GB. [2018-10-23 22:33:27,069 INFO L168 Benchmark]: TraceAbstraction took 239355.26 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 2.8 GB in the end (delta: -704.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-23 22:33:27,075 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 740.31 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 277.76 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -830.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.26 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: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3845.82 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: 121.5 MB). Peak memory consumption was 121.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239355.26 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 2.8 GB in the end (delta: -704.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 70). Cancelled while BasicCegarLoop was constructing difference of abstraction (1916states) and FLOYD_HOARE automaton (currently 13 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (274 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 239.2s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 156.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 841 SDtfs, 5060 SDslu, 437 SDs, 0 SdLazy, 6178 SolverSat, 1183 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 56.2s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 999 GetRequests, 866 SyntacticMatches, 63 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 55.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1916occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 17.0s AbstIntTime, 3 AbstIntIterations, 3 AbstIntStrong, 0.9959386144624021 AbsIntWeakeningRatio, 0.09424083769633508 AbsIntAvgWeakeningVarsNumRemoved, 400.59895287958113 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 5 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 1228 NumberOfCodeBlocks, 1228 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 1222 ConstructedInterpolants, 0 QuantifiedInterpolants, 4203220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 336/948 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown