java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label42_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 11:37:28,860 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 11:37:28,863 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 11:37:28,877 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 11:37:28,877 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 11:37:28,878 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 11:37:28,880 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 11:37:28,882 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 11:37:28,886 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 11:37:28,889 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 11:37:28,890 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 11:37:28,893 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 11:37:28,894 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 11:37:28,897 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 11:37:28,900 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 11:37:28,905 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 11:37:28,906 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 11:37:28,907 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 11:37:28,916 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 11:37:28,917 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 11:37:28,919 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 11:37:28,920 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 11:37:28,922 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 11:37:28,922 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 11:37:28,923 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 11:37:28,923 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 11:37:28,924 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 11:37:28,925 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 11:37:28,926 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 11:37:28,927 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 11:37:28,927 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 11:37:28,928 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 11:37:28,930 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 11:37:28,946 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 11:37:28,946 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 11:37:28,947 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 11:37:28,947 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 11:37:28,948 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 11:37:28,948 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 11:37:28,948 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 11:37:28,948 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 11:37:28,948 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 11:37:28,949 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 11:37:28,949 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 11:37:28,949 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 11:37:28,950 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 11:37:28,950 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 11:37:28,950 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 11:37:28,950 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 11:37:28,951 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 11:37:28,951 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 11:37:28,951 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 11:37:28,951 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 11:37:28,951 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 11:37:28,952 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 11:37:28,952 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 11:37:28,952 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 11:37:28,952 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 11:37:28,952 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 11:37:28,953 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 11:37:28,953 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 11:37:28,953 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 11:37:28,953 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 11:37:28,953 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 11:37:28,957 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 11:37:28,957 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 11:37:28,957 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 11:37:29,012 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 11:37:29,025 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 11:37:29,029 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 11:37:29,031 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 11:37:29,031 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 11:37:29,032 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label42_false-unreach-call.c [2018-11-07 11:37:29,098 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f23e793/741ce1ed63f34b85bff114790c50695c/FLAG08ec33ed8 [2018-11-07 11:37:29,749 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 11:37:29,751 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label42_false-unreach-call.c [2018-11-07 11:37:29,766 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f23e793/741ce1ed63f34b85bff114790c50695c/FLAG08ec33ed8 [2018-11-07 11:37:29,781 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f23e793/741ce1ed63f34b85bff114790c50695c [2018-11-07 11:37:29,792 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 11:37:29,794 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 11:37:29,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 11:37:29,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 11:37:29,802 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 11:37:29,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:37:29" (1/1) ... [2018-11-07 11:37:29,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da72689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:29, skipping insertion in model container [2018-11-07 11:37:29,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:37:29" (1/1) ... [2018-11-07 11:37:29,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 11:37:29,894 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 11:37:30,432 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 11:37:30,438 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 11:37:30,570 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 11:37:30,593 INFO L193 MainTranslator]: Completed translation [2018-11-07 11:37:30,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30 WrapperNode [2018-11-07 11:37:30,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 11:37:30,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 11:37:30,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 11:37:30,595 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 11:37:30,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (1/1) ... [2018-11-07 11:37:30,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (1/1) ... [2018-11-07 11:37:30,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 11:37:30,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 11:37:30,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 11:37:30,746 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 11:37:30,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (1/1) ... [2018-11-07 11:37:30,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (1/1) ... [2018-11-07 11:37:30,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (1/1) ... [2018-11-07 11:37:30,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (1/1) ... [2018-11-07 11:37:30,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (1/1) ... [2018-11-07 11:37:30,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (1/1) ... [2018-11-07 11:37:30,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (1/1) ... [2018-11-07 11:37:30,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 11:37:30,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 11:37:30,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 11:37:30,861 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 11:37:30,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 11:37:30,932 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 11:37:30,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 11:37:30,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 11:37:30,933 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 11:37:30,933 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 11:37:30,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 11:37:30,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 11:37:30,934 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 11:37:30,934 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 11:37:34,327 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 11:37:34,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:37:34 BoogieIcfgContainer [2018-11-07 11:37:34,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 11:37:34,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 11:37:34,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 11:37:34,334 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 11:37:34,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 11:37:29" (1/3) ... [2018-11-07 11:37:34,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf96276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:37:34, skipping insertion in model container [2018-11-07 11:37:34,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:37:30" (2/3) ... [2018-11-07 11:37:34,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf96276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:37:34, skipping insertion in model container [2018-11-07 11:37:34,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:37:34" (3/3) ... [2018-11-07 11:37:34,339 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label42_false-unreach-call.c [2018-11-07 11:37:34,349 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 11:37:34,359 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 11:37:34,379 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 11:37:34,418 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 11:37:34,418 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 11:37:34,419 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 11:37:34,419 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 11:37:34,419 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 11:37:34,419 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 11:37:34,419 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 11:37:34,420 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 11:37:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-11-07 11:37:34,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-07 11:37:34,459 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:37:34,460 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] [2018-11-07 11:37:34,462 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:37:34,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:37:34,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1002972724, now seen corresponding path program 1 times [2018-11-07 11:37:34,471 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:37:34,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:37:34,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:37:34,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:37:34,531 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:37:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:37:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 11:37:34,843 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 11:37:34,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 11:37:34,843 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:37:34,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 11:37:34,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 11:37:34,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 11:37:34,865 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 4 states. [2018-11-07 11:37:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 11:37:37,329 INFO L93 Difference]: Finished difference Result 737 states and 1298 transitions. [2018-11-07 11:37:37,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 11:37:37,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-11-07 11:37:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 11:37:37,356 INFO L225 Difference]: With dead ends: 737 [2018-11-07 11:37:37,356 INFO L226 Difference]: Without dead ends: 515 [2018-11-07 11:37:37,366 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 11:37:37,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-11-07 11:37:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2018-11-07 11:37:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-11-07 11:37:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 848 transitions. [2018-11-07 11:37:37,468 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 848 transitions. Word has length 24 [2018-11-07 11:37:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 11:37:37,469 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 848 transitions. [2018-11-07 11:37:37,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 11:37:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 848 transitions. [2018-11-07 11:37:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-11-07 11:37:37,475 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:37:37,476 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 11:37:37,476 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:37:37,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:37:37,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1186733907, now seen corresponding path program 1 times [2018-11-07 11:37:37,477 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:37:37,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:37:37,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:37:37,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:37:37,479 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:37:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:37:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 11:37:37,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 11:37:37,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 11:37:37,849 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:37:37,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 11:37:37,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 11:37:37,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 11:37:37,852 INFO L87 Difference]: Start difference. First operand 515 states and 848 transitions. Second operand 6 states. [2018-11-07 11:37:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 11:37:40,909 INFO L93 Difference]: Finished difference Result 1863 states and 3251 transitions. [2018-11-07 11:37:40,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 11:37:40,910 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2018-11-07 11:37:40,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 11:37:40,924 INFO L225 Difference]: With dead ends: 1863 [2018-11-07 11:37:40,925 INFO L226 Difference]: Without dead ends: 1354 [2018-11-07 11:37:40,933 INFO L604 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 [2018-11-07 11:37:40,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2018-11-07 11:37:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1331. [2018-11-07 11:37:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2018-11-07 11:37:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2051 transitions. [2018-11-07 11:37:41,009 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2051 transitions. Word has length 99 [2018-11-07 11:37:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 11:37:41,010 INFO L480 AbstractCegarLoop]: Abstraction has 1331 states and 2051 transitions. [2018-11-07 11:37:41,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 11:37:41,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2051 transitions. [2018-11-07 11:37:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-07 11:37:41,014 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:37:41,014 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 11:37:41,015 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:37:41,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:37:41,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1340062609, now seen corresponding path program 1 times [2018-11-07 11:37:41,015 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:37:41,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:37:41,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:37:41,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:37:41,017 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:37:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:37:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 11:37:41,229 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 11:37:41,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 11:37:41,230 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:37:41,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 11:37:41,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 11:37:41,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 11:37:41,231 INFO L87 Difference]: Start difference. First operand 1331 states and 2051 transitions. Second operand 6 states. [2018-11-07 11:37:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 11:37:45,393 INFO L93 Difference]: Finished difference Result 3512 states and 5693 transitions. [2018-11-07 11:37:45,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 11:37:45,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2018-11-07 11:37:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 11:37:45,414 INFO L225 Difference]: With dead ends: 3512 [2018-11-07 11:37:45,415 INFO L226 Difference]: Without dead ends: 2187 [2018-11-07 11:37:45,429 INFO L604 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 [2018-11-07 11:37:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2018-11-07 11:37:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2165. [2018-11-07 11:37:45,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2165 states. [2018-11-07 11:37:45,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 3178 transitions. [2018-11-07 11:37:45,520 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 3178 transitions. Word has length 101 [2018-11-07 11:37:45,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 11:37:45,521 INFO L480 AbstractCegarLoop]: Abstraction has 2165 states and 3178 transitions. [2018-11-07 11:37:45,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 11:37:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 3178 transitions. [2018-11-07 11:37:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-07 11:37:45,524 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:37:45,524 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 11:37:45,525 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:37:45,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:37:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash 457598944, now seen corresponding path program 1 times [2018-11-07 11:37:45,525 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:37:45,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:37:45,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:37:45,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:37:45,529 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:37:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:37:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 11:37:45,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 11:37:45,780 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 11:37:45,780 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 105 with the following transitions: [2018-11-07 11:37:45,783 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [93], [95], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 11:37:45,846 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 11:37:45,846 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 11:37:46,410 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 11:37:47,233 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 11:37:47,235 INFO L272 AbstractInterpreter]: Visited 88 different actions 497 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 11:37:47,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:37:47,283 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 11:37:47,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 11:37:47,284 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 11:37:47,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:37:47,298 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 11:37:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:37:47,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 11:37:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 11:37:47,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 11:37:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 11:37:47,943 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 11:37:47,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-07 11:37:47,944 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:37:47,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 11:37:47,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 11:37:47,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 11:37:47,946 INFO L87 Difference]: Start difference. First operand 2165 states and 3178 transitions. Second operand 3 states. [2018-11-07 11:37:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 11:37:50,400 INFO L93 Difference]: Finished difference Result 4762 states and 7150 transitions. [2018-11-07 11:37:50,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 11:37:50,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2018-11-07 11:37:50,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 11:37:50,422 INFO L225 Difference]: With dead ends: 4762 [2018-11-07 11:37:50,422 INFO L226 Difference]: Without dead ends: 2603 [2018-11-07 11:37:50,437 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 11:37:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2018-11-07 11:37:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2603. [2018-11-07 11:37:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2603 states. [2018-11-07 11:37:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 3690 transitions. [2018-11-07 11:37:50,517 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 3690 transitions. Word has length 104 [2018-11-07 11:37:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 11:37:50,517 INFO L480 AbstractCegarLoop]: Abstraction has 2603 states and 3690 transitions. [2018-11-07 11:37:50,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 11:37:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 3690 transitions. [2018-11-07 11:37:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-07 11:37:50,520 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 11:37:50,520 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 11:37:50,521 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 11:37:50,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:37:50,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2140674393, now seen corresponding path program 1 times [2018-11-07 11:37:50,521 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 11:37:50,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:37:50,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 11:37:50,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 11:37:50,523 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 11:37:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 11:37:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 11:37:50,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 11:37:50,773 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 11:37:50,774 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 106 with the following transitions: [2018-11-07 11:37:50,774 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [93], [95], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 11:37:50,784 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 11:37:50,784 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 11:37:51,016 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 11:37:51,024 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 11:37:51,024 INFO L272 AbstractInterpreter]: Visited 85 different actions 85 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 11:37:51,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 11:37:51,063 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 11:37:51,490 INFO L227 lantSequenceWeakener]: Weakened 89 states. On average, predicates are now at 73.31% of their original sizes. [2018-11-07 11:37:51,491 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 11:37:52,345 INFO L415 sIntCurrentIteration]: We unified 104 AI predicates to 104 [2018-11-07 11:37:52,345 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 11:37:52,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 11:37:52,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2018-11-07 11:37:52,347 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 11:37:52,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 11:37:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 11:37:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-07 11:37:52,349 INFO L87 Difference]: Start difference. First operand 2603 states and 3690 transitions. Second operand 10 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown